US2690724A - Sewing machine - Google Patents

Description

Oct. 5, 1954 J. F. EISENBEISS SEWING MACHINE 6 Sheets-Sheet 1 Filed 8. 1959 FIG. 7'

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INVENI'OP Ton F. E 1551185155 Oct. 5, 1954 J. F. EISENBEISS SEWING MACHINE Filed Feb. 28, 1950 6 Sheets-Sheet 2 INVENTUP.

T Tot-m F E/SENBE/Ss w.- v A Oct. 5, 1954 J. F. EISENBEISS SEWING MACHINE 6 Sheets-Sheet 3 Filed Feb. 28, 1950 @Im ll ik I- INVENI'OPI :TOHH F 51557985155 5) Oct. 5, 1954 Filed Feb. 28, 195? J. F. EISENBEISS SEWING MACHINE 6 Sheets-Sheet 5 INVENTOP Tend F Elsenavss Oct. 5, 1954 J. F. EISENBEISS SEWING MACHINE 6 Sheets-Sheet 6 Filed Feb. 28, 1950 INVENTOP.

Iron/1 F. EISEP/BE/SS BY Patented Get. 5, 1954 IT'ED; STATES ATENT OFFICE Claims priority, application Switzerland March 2, 1949 11 Claims. 1

The sewing machines hitherto knownusually have a rotary drive which is efiected either by a foot actuated treadle, manually'by means of a handle, or by means of motors, this drive is'connected to the actual sewing membersof the machine by means of a number of cdrnplicated gears such'as spur gearing, combined crank and cam gear, screw gear, etc. 'The'rotary movement must, therefore, firstly be converted by'mechanically interacting gears and controlling members into a straight line reciprocating movement for the sewing needle, secondly it must be converted with the aid of cams and the like'into the substan: tially straight line reciprocating 'movement of the feeder for the material to be sewn, and thirdly, it must be converted "either into an oscillating movement of the shuttle Whichis moved through the loop of the thread on theunderside of the material, or into anfos'cillating movement of the loop forming means whichacts on the'lo'op' of the thread which is passed through the material for formingachain-stitch.

These three main kinds of movement have, therefore, scarcely anything in common withfthe original rotary movement, 'but are derived from it in a form which is in part complicated. The difliculty is essentially. due to th fact that the individual parts to be moved are not directly adjacent to one another in space and consequently must be related to one another an invariable sequence of operations. This explains the complicated mechanical construction of the known sewing machines. i

The object of the invention is to o bviate these disadvantages of the known sewing machines and to provide a sewing machin'ewhich'is'con siderably simpler as regards its mechanicalconstruction and its mechanicaldrivingmembers, particularly as regards the members which move the needle carrier, the shuttlaairi'd the material.

feeder. A further object of the invention is to obtain an appreciable, economy in power and, therefore, a bettereiiiciency than the known sew: ing machines.

Another object of the invention is to provide sewing machine in which known driving 'me'm hers effect movement of the needle carrier, the shuttle or the loop-forming'rneans, and the ma terial feeder, the driving force of which members acts mainly in a straight, line on the said parts of the sewing machine, any rotating masses being toalarge extent avoided. n 4' w v A Preferably such driving member s comprise electro-magnets or solenoids, thecontrolling contacts of which a e e ted, theupwar ye d.

downwardly moving needle carrier, or by a cam contact-making device which is driven by an electric motor of small canacity;

The drive of the upwardly and downwardly moving sewing'menibers of the machine is therefore no longer derived as previously from a rotating movement, but from" the starta reciprocating driving.movementisprovided,

Further details of the invention will appear from the following description of the'drawings and the claims,

-Various forms of sewing machines constructed in accordance with the invention are illustrated diagrammatically and by way of examplefin the accompanying drawings, in which:

Figure 1 showsv in side elevation the construction of a sewing machine according tothe in en I r 3:.

Figure 2 is a top plan View showing the material feeder and shuttle fitted in 'thebase of the sewing machine frame;

Figure 3 showsanother method of driving the shuttle; 1

Figure 4 shows diagrammatically the arrangement of the sewing members;

Fig. 4a" is alongitudinal sectional view through the machine;

Fig. 4b is a sectional view through the machine base on line 4b4b inFigmld and illustrating the feeder mechanism} t Fig. 4c is a plain view ofthe machine base with the base plate partly broken 01f Figure 5 is a diagram showing the electrical connections for the sewing members;

Figure 6 illustrates diagrammatically and in section, a contact-making device for the electromagnetic driving means for the needle carrier, the shuttle, and material feeder, and the corresponding driving motor in elevation;

Figure '7 is a plan of the driving motor with an interposed stepless gearing connected to it;

Figure 8 is a diagrammatic plan of the electromagnetic drive fOr' the oscillating shuttle;

Figure 9 is a detail view partly in section and broken away, of the arm which is removable'from the casing of the sewing machine and is adjustable in height, and has a circuit-breaking nt t;

Figure 10 is a plan of the swingable arm which is fixed to the casing of the sewin g machine;

Figures 11 and 12 show diag'ramm'atically and in side elevation detail views of the needle carrier which is fixed to the arm which is not further illustrated and is adjustable as to height in accordance with Figure 11, is swingable and can be fixed according to Figure 12; and

Figure 13 shows diagrammatically an electrical device of a known kind for damping the movement of the needle carrier.

In all the figures like parts are like reference numerals.

Referring to the drawings, the machine fralne comprises a base i and an arm 2 which carries the head 3 for mounting the needle carrier in which the sewing needle 5 is clamped. The needle carrier l is constructed at its upper end as a piston 6 which is movable upwards and downwards in a cylinder a which is fitted on the head 3. The admission of air to the upper cylinder space 9 can be adjusted by a valve 8. The reference numerals l6 indicates the winding of an electro-magnet which is placed around an iron core H of the needle carrier 1. A compre sion spring i2 is disposed between collar it of the needle carrier i and the lower end of the head 3 f the needle carrier. The spring [2 serves to press the needle carrier 3 upwardly into its normal or inoperative position.

The base i houses material feeder l i which advances the material to be sewn in known manner by means of a ribbed plate, and also the shuttle 55 (see Figure 2). As shown in Fig. 4b, the feeding member I i is supported by a knee lever Mia which is pivotally mounted on the pin Mb. Pin 4b is fixed to a bracket in the housing 1. The feeding member M has an arm Hi which projects into a magnet winding ii. A core ill is provided, which has one leg i6 projecting into the winding ll and another leg it which has an end portion located opposite the vertical arm 54a of the knee lever l la. A spring Me is secured at one end thereof to the feeding means i4 and at the other end to the housing I and urges the feeding member i l into the initial position shown in Fig. 41).

When the electromagnet winding ii is excited, the arm l la is attracted by the lower leg portion E of the core 55 whereby the lever his is turned until it abuts against the cor It. The horizontal arm of the knee lever I ia raises the feeding member it during the turning movement of lever Ma so that the feeder is adapted to engage a material placed on top of the housing denoted by l. At the same time the horizontal projection of the feeding member M- is attracted by the leg IE to move into the winding ll so that the feeding member performs a horizontal movement in forward direction for feeding the material.

When the current passing through winding i? is interrupted by the contact ii, the knee lever l la drops into its initial position shown in Fig. 473 due to the action of gravity, while simultaneously the spring i ic retracts the feeding men1- ber I i which is now in its lower position and does not engage the material.

An electro-magnet winding H is disposed around an iron core 16 which is fixed to the material feeder M. A shuttle holder !9 which is pivoted at E8, is likewise provided at each of its ends with iron cores 2t, 2G for cooperation with magnet windings Zia and 2 lb respectively. Th numeral 22 represents a flexible lead having a plug by means of which the sewing machine can be connected to a convenient source of electric current for operating the several parts of the machine.

The electrical connections to the machine will be seen from Figures 4 and 5, in which also the essential parts of the sewing machine are diagrammatically illustrated.

The windings lll, ll, 2m and Zlb are provided with corresponding spring contacts I (3, l? and 2! The numerals 23 and 23' indicate a switchover device comprising two spring-operated contacts which is connected in the circuit of the magnet windings Zla and Zlb.

As can be seen from Fig. 4 the current flows through the windings Zia and Zlb in opposite directions and the spring operated contacts 23 and 23 each tend to close the corresponding circuit. The magnet cores 20 and 20' are movably mounted on a pivoted member I9 which also carries the shuttle I5 as can be clearly seen from Fig. 2. If for instance the magnet winding Zlb is energized by the closed contact 23 the core 20 is attracted to move into the winding 2 lb, and in doing so opens the respective contact 23. This position is illustrated somewhat simplified in Fig. 4 in which the shuttle i5 represents also the members 20 and 20. When the movable element I9, 20, 2!), I5 on its way into the winding 2!?) has released contact 23, the contact 23 closes and energizes the magnet winding 2! a, so that the magnet core 28 may be attracted and again moved into the winding 21a for opening the contact 23.

Figure 4 also illustrates that the arm 2 can be arranged on the case so that it can be swung outwardly by means of a hinge 24, or by means of a similar hinge 25 can be swung sideways out of the plane of the paper, or the arm 2 can be replaced by a longer arm 26, which is shown in dotted lines, and can be fixed by means of bayonet fastening 21. The interchangeability of the arm has the advantage that when working on pieces of material which are not easy to handle, a larger arm can be inserted which enables the material to be introduced more easily.

Figures 9 and 10 show a further form of construction for enabling the arms to be swung 1aterally. In this case the arm is rotatable in a holder 23 on the machine base and is arranged so that it can be fixed and taken out, for which purpose there is used a spring detent 29 which may be of a known kind (Figure 9).

In cases when the arm is arranged to be swingable or tiltable and/or interchangeable on the machine frame, it is preferred that a spring contact as (Figure 4) should be interposed in the electric circuit, so that on tilting, swinging or removing the arm, the circuit is automatically broken and when the arm is returned to its position or replaced, the circuit is again automatically connected.

To the needle carrier is fitted a contact actuator member 3| which causes opening and closing of the contacts [0, H and 2| during the upward and downward movement of the needle carrier.

The numeral 32 denotes the main switch for the circuit of the sewing machine (Figure 5). When this switch 32 is closed, the electro-magnets Ill, I1, 2Ia and 2lb are energized in coordination with the sequence of working operations, by reason of the control of their contacts, so that the machine which is shown in Figures 4 and 5 operates in the following manner.

When the electro-magnet I0 is energized, the needle carrier 4 is moved downwardly from its upper position. The needle passes through the material being sewn and also passes together with the thread loop through the needle hole 33 in the closure plate 34 of the base I of the sewing machine. Whenther eedle reaches. its lower dead point, the contact actuatonmembers, 3i opens the contact I and thefiowof current-in the. coil [0 is-interrupted, so that the needle carrier is then moved back into its upper posie tion by the spring l2. Shortly before the needle.

is moved from its right position into its leftv position, as can be seen from Figures 2 and 4. In this way the shuttle is. shot through the loop of the thread carried by the needle. At the end of this movement the core 28 of the shuttle l strikes against the switchover device 23 and interrupts thus the flow of current for energizing the electro-magnet 2 la, while permitting closing of the spring-operated contact 23' permitting the flow of currentthrough electro-magnet Zlb. The. electro-magnet 2lb, however, is not yet energized because the contact 2 i has been opened again in the meantime. When the needle carrier has approximately reached its upper dead point, the contact [1 is closed for a short time by the contact actuator 3i and the electro-magnet H is energized for a short time whereby the feeder id. is actuated and consequently advances the material to be sewn. After the material has been advanced the contact I0 is closed by the contact actuator and the magnet coil [0 is energized, whereby the needle carrier 4 is again moved downwardly. During this downward movement the point of the needle again penetrates through the needle hole 33.

Shortly befor the needle carrier is reaching the lower end of its stroke the contact 2! is again closed by the contact actuator 3i, andnow. the coil of the electro-magnet Zlb isv energized by means of the closed switch-over contact 23 which had already been released by the shuttle 55. During the following upward movement of the needle carrier contact 21 is again opened because the pressure of the contact actuator 3| on the contact 2| ceases. By means of the energized electro-magnet 2lb the shuttle i5 is. drawn to the right side. When the shuttle l5 reaches its end position on the right, it shiftsthe switchover contact 23 again so that the flow of current for energizing the electro-magnet 2ib-is openedby the switchover contact 23 while the circuit for the eleotro-magnet Zia is closed by the switch-over contact 23 so as to be ready for the next operation. The electro-magnet 210,, however, is not yet energized because in the meantime contact 2l is again opened as illustrated in Fig. 4. Then, on the following movements of the needle carrier, the movements. of the feeder id and the shuttle 15 are alsorepeated in time with the actuation of the contacts, in the manner described.

The regulation of the speed of the needlecar rier 4 is efiected by the damping action of the piston 6 in the cylinder? and the valve 8,. By adjusting the effective cross-sectional area of the air passage of the valve by means of the valve screw 2, the damping of the piston move? ment is reduced or increased as desired and, therefore, the speed of the needle carrier is increased or reduced. When the valve is fully open e ppa tu pe te eeer iinet t. e frequency of oscillation. a'sdetermined by. the,

pri ig. ten ion, e ma ses. nd he l tromaa neticforce.

An electromagnetic clamping, device .may how ever be used instead of thismechanically acting dampingv device foradjustingthe speed. of. the.

means of the resistor 36. theforce of the field.

produced by the ring 35 may beadjusted to the desired value.

In orderthat the upward anddownward movement of the needle carrier may takeplace with certainty when the stroke islong, it may be advantageous to split up thewinding of the coil of the electromagnet I0. of the needle carrier, as is also illustrated in Figure i3, by the conductors 31, 38 and 39. which areconnected in succession.

The swingable and/or tiltableand/or. releasable arrangement ofv thea'rrn z onthe machine frame, which haspreviously been described in connection with Figures. 4 and 9, is a particular advantage of the invention because, there areno mechanically moved partsiin thearrn of the sewing machine, such asare present. in; the known machines which are operated by foot, hand; or an electric motor, and. consequently a serious disadvantage oflthe hitherto known sewing ma chines is avoided. This disadvantage is that it is very often inconvenient for the .user to introduce material between the needle and the base plate, because a large amount of material must often be pushed through the space between the sewing needle and the base plate before ,the, partof the material, which is to be. sewn, is located in the correct working position. Owing to the swingable, tiltable or; removable arrangement of the arm of the sewing machine, the material can now be brought into the desired working position, whereupon the arm can be swung, tilted or replaced back into the sewing position of the machine.

The omission ofany mechanical gear parts for the actual sewingprocess such as are present in the known machine also enables. the sewing machine to be further subdivided in such a manner that it can easilybe taken to pieces for trans.- portand the piecescan be fittedin a very small space in a container.

In order to protect the operator from injury from the freely projectingneedle when the arm of the machine is tilted upwards or swung-aside or removed, the contact; device 36. (Figures 4 and 11) is provided. On swinging or tilting upwards or removing the arm, the supply of current to the electro -magnet IB of the needle carrier is interrupted by the contactdevice 39, so that the needle carrier is pressed: by the, spring to its upper dead point.

Instead of a contact actuating device comprising a member'fixed to the needle carrier as has been. described in. connection with the example, of Figure 4, a cam may beprovided, for this pur--. se S an. ar a e e t i u t a by 7 way of example, in Figure 6. The operation of the contacts I1, and 2| (schematically illustrated in Fig. 6), which are actuated by the cam means 58 is to be understood in connection with the diagram shown in Fig. 5. v

In this figure, the sewing machine is not illustrated, but ll) represents the base late of the machine and a small capacity electric motor M which is required to deliver scarcely any mechanical power is mounted on the base plate. This motor may however also be arranged to drive a rotating or oscillating shuttle and also it may be employed for winding thread on to the shuttle spools.

The numeral 42 indicates the supply current leads and the numeral 43 a series resistance of known kind by which the speed of rotation of the motor is regulated. A pinion 45 fixed on to the motor shaft 44 engages with a spur-wheel G6, which is fixed on a shaft 48 journalled in casing 51. On the shaft 48 are mounted three cam plates 49 the cam surfaces of which are indicated by the numeral 50. Below these cam plates are the electrical contacts l0, 1" and 2|, which are disposed in known manner in an oil bath 51 in order to prevent sparking when the circuit is broken.

The numeral 52 indicates an easily accessible hand wheel which is fixed on the shaft 88 for manual adjustment of the sewing needle when desired. This adjustment can be effected because the power of the motor is so small that it does not constitute any danger to the person making the adjustment.

The speed of the motor ll is reduced by the reducing gear 45, 66. The series resistance 43 enables the speed of the motor and, therefore, the frequency of the stroke of the needle carrier to be regulated as required.

In the constructional example of Figure 7, the gear 45, 46 of the above described form of construction is replaced by an infinitely variable mechanical gear of known kind. A combination of both kinds of gear can also be employed. The gearing shown in Figure 7 consists of two cones 53 and 54 and a belt 55 which can be moved to and fro in the axial direction by means of a lever or fork 56 whereby the speed is regulated.

By using a contact-making device of the kind illustrated in Figure 6 for the electro-magnetic driving means for moving the needle carrier, the shuttle, or the loop forming means and the material feeder means, a mechanical or electro-magnetic damping device for regulating the speed of the needle carrier can be dispensed with and, further, the sewing speed can be regulated to a sufiicient extent by the motor ll which drives the contact-making means, which was not possible with the hitherto known and usual sewing machine driven by an electric motor.

Further, the stopping position of the driving motor 4!, the momentum of which is very small, can be so adjusted that at the end of the sewing process the needle is disposed as desired in either upper or lower position. For this purpose two pins 1'2 and '13 are provided on the hand wheel 52 at different distances from the centre of the wheel, and an adjustable stop M is provided which can be moved to either of two stopping positions and so into the path of one or the other of the pins 1'2 and I3. According to the adjustment of the stop, the contact [0' is held either open or closed and, therefore, the needle carrier will be retained in either its upper or lower position. Such locating of the needle carrier cannot be obtained with the known sewing machines having an electric drive.

Since the cams 49, 50 close the contact 10' in one position, and open the contact in a position turned 180, and these positions correspond to the upper, or lower position of the needle carrier, the needle carrier is stopped in the upper, or in the lower position when the cam 49, 5B which actuates the contact I0 is arrested in one of two predetermined positions which are spaced for 180. The adjustable stop 14 arrests pin 72 in one position, and if moved in a radial direction, arrests stop 13 in the other position of the wheel 52, shaft 48 and cam 49, 56. The second cam 49, 50 operates the contact 2i, and the arrangement of the cams is such that during a rotation of the shaft 43 by the auxiliary electric motor H the contacts l0, l7 and 2i are opened and closed in the order required for the operation of the sewing machine. The cycle of actuation of these contacts has been described and explained referring to the contact actuating member 3!.

When using an oscillating shuttle it is recom mended that a driving means which is shown in Figure 8, by way of example, should be used. In this figure the numeral 5'! denotes an oscillating shuttle or shuttle carrier having a pinion 58 which engages with a toothed wheel 66 which is rotatably mounted at 59. A rod 62 is fixed to the iron core SI of an electro-magnet 2i and engages the toothed wheel at E3. The numeral 6 represents a tension spring one end of which is fixed to the sewing machine frame 65 and the other end is attached at E6 to the toothed wheel 66. Thus, in accordance with the impulses which the electromagnet receives during the course of the operating rhythm of the sewing machine, th shuttle 5'! swings to and fro. When the winding of the electro-magnet 21 is energized by the contacts previously described, the iron core 6| is drawn into the winding and turns in a certain degree the gear 60 by means of the rod 62 engaging the point 63 of the gear 50. This partial turn is transmitted to the oscillating shuttle by the gear 60 and 58 having a suitable ratio of transmission.

When the energizing of the coil of the electromagnet 2| ceases by means of the action of the contacts previously described, the tension spring 64 engaging the gear 60 at point 66 causes a partial turn in the opposite direction of the gear 68. This partial turn is again transmitted to the shuttle 5'! by means of the gear 66 and 58. In this way the oscillating movement of the shuttle 57 is caused.

In Figure 2 the disposition of the motor 4! and the contact-making device is diagrammatically indicated. In Figure 3 the drive of a rotary shuttle 10 of a kind known per se, by means of a simple bevel gear H from the motor 41 is diagrammatically illustrated.

Since, as previously described, the arm of the sewing machine is free from any rotary driving members, the parts of which are in the mechanical engagement With one another, it is directly possible, and in many cases desirable, to arrange for the head 3 of the needle carrier (see Figure 11) to be adjustable in height on the arm of the sewing machine, so that it can be adjusted upwardly or downwardly in the direction of the arrow indicated.

In the form of construction illustrated in Figure 12, the head 3 of the needle carrier is pivotally mounted so that it can be swung out in the direction indicated by the arrcwand-canbe fixed in that position indicated in broken lines, for example, by a locking screw.

I claim:

1. In a sewing machine, in combination, a supporting frame'inoluding asubstantially horizontal base; a sewing head mounted on said supporting frame; a needle carrier vertically movably mounted in said sewing head; first electromagnet means for driving said needle carrier and including a stationary member secured to said sewing head and a movable member secured to said needle carrier, one-of said members being a winding; first contact means arranged in series with said winding of said first electro-magnet means; a feeding member movably mounted in said base underneath said sewing head; second electro-magnet means for driving said feeding member and including a stationary member'secured to saidbase and a-movable member secured to said feeding member, one of said members being a winding; second contact mean arranged in series with said winding of said second electro-magnet means; shuttle means movably mounted underneath said horizontal base; third electro-magnet means for driving said shuttle means and including at least one stationary member secured to said base and one movable member secured to said shuttle means, one of said members being a winding; third contact means arranged in series with said winding of said third electro-magnet means; and actuating means secured to said needle carrier and during movement of the same engaging and actuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence whenever corresponding contact means are closed.

2. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; a sewing head mounted on'said supporting frame; a needle carrier vertically movably mounted in said sewing head; spring means arranged in said sewing head tending to retract said needle carrier; first electro-magnet means for driving said needle carrier and including a stationary member secured to said sewing head and a movable member secured to said needle carrier, one of said members being a winding; first contact means arranged in series with said winding of said first electro-magnet means; adjustable damping means secured to said sewing head and connected with said needle carrier for regulating the speedof the movement of said needle 'carrier; a feeding member movably mounted in said base underneath said sewing'head; second electro-magnet means for driving said feeding member and including a stationary member secured to said base and a' movable member secured to said feeding member, one of said members being a winding; second contact means arranged in series with said winding of said second electromagnet means; shuttle means movably mounted underneath said horizontal base; third electromagnet means for driving said shuttle means and including at least one' stationary member secured to said base and one movable member secured to said shuttlemeans, one of saidmembers being a winding; 'third contact means arranged in series with 'said winding of said third electro-magnet means; and actuatingmeans secured to said needle carrierand during movement of the same engaging andactuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said ing; first contact means arranged in series with said winding of said first electro-magnet means; a feedin member movably mounted in said base underneath said sewing head; second electromagnet means for driving said feeding member and including a stationary member secured to said base and a movable member secured to said feeding member, one of said members being a winding; second contact means arranged in series with said winding of said second electro-magnet means; shuttle means movably mounted underneath said horizontal base; third electro-magnet means for driving said shuttle means and including at least one stationary member secured to said base and one movable member secured to said shuttle means, one of said members being a wind- "ing; third contact means arranged in series with said winding of said third electro-magnet means; and actuating means for actuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence whenever corresponding contact means are closed, said actuating means including electric motor means mounted in said supporting frame, cam means rotated by said electric motor means and engaging during rotation said contact means in a predetermined order, and adjustable transmission means intermediate of said electric motor means and said cam means.

4. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; a sewing head mounted on said supporting frame; a needle carrier vertically movably mounted in said sewing head; first electro-magnet means for driving said needle carrier and including a stationary member secured to said sewinghead and a movable member secured to said needle carrier, one of said members being a winding; first contact means arranged in series with said winding of said first electro-magnet means; adjustable clamping means including a cylinder fixedly mounted on said sewing head, a piston fixedly mounted on said needle carrier and movable in said cylinder, and an adjustable valve in said cylinder for regulating passage of air; a feeding member movably mounted in said base underneath said sewing head; second electro-magnet means for driving said feeding member and including a stationary member secured to said base and a movable member secured to said feeding member, one of said members being a winding; second contact means arranged in series with said winding of said second electro-magnet means; shuttle means movably mounted underneath said horizontal base; third electro-magnet means for driving said shuttle means and including at least one stationary member secured to said base and 11 one movable member secured to said shuttle means, one of said members being a winding; third contact means arranged in series with said winding of said third electro-magnet means; and actuating means secured to said needle carrier and during movement of the same engaging and actuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence whenever corresponding contact means are closed.

5. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; a sewing head mounted on said supporting frame; a needle carrier vertically movably mounted in said sewing head; first electro-magnet means for driving said needle carrier and including a stationary member secured to said sewing head and a movable member secured to said needle carrier, one of said members being a winding; first contact means arranged in series with said winding of said first electro-magnet means; adjustable damping means including electric coil means secured to said sewing head, oppositely wound and adapted to counteract the action of said winding of said first electro-magnet means, and a variable electric resistance in series with said coil means for regulating the current flowing through said coil means; a feeding member movably mounted in said base underneath said sewing head; second electro-magnet means for driving said feeding member and including a stationary member secured to said base and a movable member secured to saidfeeding member, one of said members being a winding; second contact means arranged in series with said winding of said second electro-magnet means; shuttle means movably mounted underneath said horizontal base; third electro-magnet means for driving said shuttle means and including at least one stationary member secured to said base and one movable member secured to said shuttle means, one of said members being a winding; third contact means arranged in series with said winding of said third electro-magnet means; and actuating means secured to said needle carrier and during movement of the same engaging and actuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence Whenever corresponding contact means are closed.

6. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; a sewing head mounted on said supporting frame; a needle carrier vertically movably mounted in said sewing head; first electro-magnet means for driving said needle carrier and including a stationary member secured to said sewing head and a movable member secured to said needle carrier, one of said members being a winding comprising at least two coils; a first contact means arranged in series with said coils of said first electro-magnet means and adapted to energize said two coils of said first electromagnet means, successively; adjustable damping means including cooperating cylinder and piston members, one of said last mentioned members being fixedly secured to said sewing head and the other of said members being fixedly secured to said needle carrier and an adjustable valve on said one member for regulating passage of air; a feeding member movably mounted in said base underneath said sewing head; second electro-magnet means for driving said feeding memher and including a stationary member secured to said base and a movable member secured to said feeding member, one of said members being a winding; second contact means arranged in series with said winding of said second electromagnet means; shuttle means movably mounted underneath said horizontal base; third electromagnet means for driving said shuttle means and including at least one stationary member secured to said base and one movable member secured to said shuttle means, one of said members being a winding; third contact means arranged in series with said winding of said third electro-magnet means; and actuating means secured to said needle carrier and during movement of the same engaging and actuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence whenever corresponding contact means are closed.

'7. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; an arm member mounted on said supporting frame and extending substantially parallel to said horizontal base; a sewing head mounted on the end of said arm member; a needle carrier vertically movably mounted in said sewing head; first electro-magnet means for driving said needle carrier and including a stationary member secured to said sewing head and a movable member secured to said needle carrier, one of said members being a winding; first contact means arranged in series with said winding of said first electro-magnet means; adjustable damping means including cooperating cylinder piston members, one of said last mentioned members being fixedly secured to said swing head and the other of said members being fixedly secured to said needle carrier and an adjustable valve on said one member for regulating passage of air; a feeding member movably mo unted in said base underneath said sewing head; second electro-magnet means for driving said feeding member and including a stationary member secured to said base and a movable member secured to said feeding member, one of said members being a winding; second contact means arranged in series with said windings of said second electro-magnet means; shuttle means movably mounted underneath said horizontal base; third electro-magnet means for driving said shuttle means and including at least one stationary member secured to said base and one movable member secured to said shuttle means, one of said members being a winding; third contact means arranged in series with said winding of said third electro-magnet means; and actuating means secured to said needle carrier and during movement of the same engaging and actuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence whenever corresponding contact means are closed.

8. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; projecting means formed with bore means projecting from said supporting frame; a detachable bolt means passing through said bore means; a detachable arm member mounted on said supporting frame and having projecting means formed with bore aligned with said bore means, said bolt means passing also through said bores so that said arm member is to be interchanged with other arm members, and extends substantially parallel to said horizontal base; a sewing head mounted on the end of saidarm member; a needle carrier vertically movably mounted in said sewing head; first electro-magnet means for driving said needle carrier and including a stationary member secured to said sewing head and a movable member secured to said needle carrier, one of said 'members being a winding; first contact means arrangedin series with said winding of said first electro-magnet means; adjustable damping means includingco operating cylinder and piston members, one of said last mentioned members being fixedly secured to said sewing head and the other of said members being fixedly secured to said needle carrier and an adjustable valve on said one member for regulating passage of air; a feeding member movably mounted in said base underneath said sewing head; second electro-magnetmeans for driving said feeding member and including a stationary member secured to said base and a movable member secured to'said feeding member, one of said members being a winding; second contact means arranged inseries with said winding of said second electro-magnet means; shuttle means movably mounted underneath said horizontal base; third electro-magnet means for driving said shuttle means and including at least one stationary member secured to said base and one movable member secured to said shuttle means, one of said members being a winding; third contact means arranged in series with said winding of said third electro-magnet means; and actuating means secured to said needle carrier and during movement of the same engaging and actuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence whenever corresponding contact means are closed.

9. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; an arm member pivotally mounted on said supporting frame extending substantially parallel to said horizontal base in operative position, and adapted to be pivoted to an inoperative position; a sewing head mounted on the end of said arm member; a needle carrier vertically movably mounted in said sewing head; first electro-magnet means for driving said needle carrier and including a stationary member secured to said sewing head and a movable member secured to said needle carrier, one of said members being a winding; first contact means arranged in series with said winding of said first electro-magnet means; a feeding member movably mounted in said base underneath said sewing head; second electro-magnet means for driving said feeding member and including a stationary member secured to said base and a movable member secured to said feeding member, one of said members being a winding; second contact means arranged in series with said winding of said second electro-magnet means; shuttle means movably mounted underneath said horizontal base; third electro-magnet means for driving said shuttle means and including at least one stationary member secured to said base and one movable member secured to said shuttle means, one of said members being a winding; third contact means arranged in series with said winding of said third electro-magnet means; and actuating means secured to said needle carrier and during movement of the same engaging and actuating said contact means in a predetermined serum 14 order so that said needle carrier, *said feeding member, andsaid'shuttlemeans are operated'in a predetermined sequence whenever correspondingcontact meansare closed.

10. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; ase'wing head mounted on said supporting frame; a needle :carrier vertically movably mounted insaid "sewing head; spring means arranged in said sewing h'ead tending to retract said needle carrier; first electro-magnet means for driving said needle carrier and including a stationary member secured to said sewing headand a'mov'able member secured to said needle carrier, one of said members being a; winding; first contact means arranged in serieswith said winding of said'first eelctro magnetmeans; a feeding member movably mounted-in said base underneath said sewing head; second electromagnet means for driving "said "feeding member and including a stationary member secured to magnet means; shuttle means movably mounted underneath said horizontal base; third electromagnet means for driving said shuttle means and including at least one stationary member secured to said base and one movable member secured to said shuttle means, one of said members being a inding; third contact means arranged in series with said winding of saidthird electromagnet means; actuating means for actuation of said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence whenever corresponding contact means are closed, said actuating means including electric motor means mounted in said supporting frame, a shaft, cam means fixedly secured on said shaft and engaging during rotation said contact means in a predetermined order, and adjustable transmission means intermediate of said electric motor means and said shaft for rotating said cam means; a wheel fixedly mounted on said shaft of said cam means and provided with two projections arranged in a predetermined position thereon; and manually operated stop means movable between two positions and in each position engaging one of said projections so as to stop said cam means by means of one of said two projections in one of two positions, one position corresponding to open first contact means and the other to closed first contact means, whereby said needle carrier is stopped in an upper end position when said stop means engage one of said projections, and in a lower end position when said stop means engage the other of said projections.

11. In a sewing machine, in combination, a supporting frame including a substantially horizontal base; a sewing head mounted on said supporting frame; a needle carrier vertically movably mounted in said sewing head; first electro-magnet means including a winding secured to said sewing head and a core secured to said needle carrier for driving said needle carrier; first contact means arranged in series with said winding of said first electro-magnet means; adjustable damping means including cooperating cylinder and piston members, one of said last mentioned members being fixedly secured to said sewing head and the other of said members being fixedly secured to said needle carrier, and an adjustable valve on said one member for regulating passage of air; a feeding member movably mounted in said base underneath said sewing head; second electro-magnet means including a winding secured to said base, and a core secured to said feeding member for driving said feeding member; second contact means arranged in series with said winding of said second electro-magnet means; shuttle means movably mounted underneath said horizontal base; third electro-magnet means for driving said shuttle means including two cores secured to said shuttle means and a winding including two coils, one of said two coils when energized attracting one core of said shuttle means and tending to move said shuttle means in one direction, and the other of said two coils when energized attracting the other core of said shuttle means and tending to move said shuttle means in an opposite direction; third contact means arranged in series with said winding of said third electro-magnet means; a switch-over device including two spring operated contacts actuated by said cores secured to said shuttle means, each of said spring operated contacts being arranged in series with said winding of one of said two coils of said third electro-magnet means in series with said third contact means for energizing each of said two coils separately; and actuating means secured to said needle carrier and during movement of the same engaging and actuating said contact means in a predetermined order so that said needle carrier, said feeding member, and said shuttle means are operated in a predetermined sequence whenever corresponding contact means are closed.

References Cited in the file of this patent UNITED STATES PATENTS

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