US802098A - Feeding mechanism for sewing-machines. - Google Patents

Description

No. 802,098. PATENTED 0OT.1'7,1905. W. G. FREE. FEEDING MECHANISM FOR SEWING MACHINES.

3 SHEETS SHEET 1.

Wibzawwu:

No. 802,098. PATENTED OCT. 17, 1905.

W. 0. FREE.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED AUG. 2. 1005.

a SHEBTS-SHEET 2.

Inmu mu m No. 802,098. PATENTED OCT. 1'7, 1905. W. 0. FREE.

FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED AUG. 2. 1905 3 SH EBTS-SHEBT 3- N Eva/afar- WILLIAM 0. FREE, OF CHICAGO, ILLINOIS.

FEEDING MECHANISM FOR SEWING-MACHINES- Specification of Letters Patent.

Patented Oct. 17, 1905;

Application filed August 2, 1905. Serial No. 272,404.

To all whom, it may concern.-

Be it known that I, WVILLIAM 0. FREE, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Feeding Mechanism for Sewing-Machines,of which the following is a specification.

My invention has for its object the simplification and improvement of mechanism of the class mentioned above; and it consists of certain new and useful features of construction and combinations of parts especially devised to those ends, all as hereinafter fully described, and specifically pointed out in the claims appended hereto.

Referring to the accompanying drawings, which form a part of this specification, Figure 1 is a bottom plan view of a sewing-machine provided with my improvements. Fig. 2 is a vertical partial section of the machine at the dotted line 2 2 in Fig. 1. Fig. 3 is a section at the dotted line 3 3 in Fig. 1 of parts there shown. Fig. 4 is an isometrical detail of the feeding mechanism of the machine detached from the base-plate thereof. Fig. 5 is a detail to be referred hereinafter.

Like letters of reference indicate corresponding parts throughout the several views.

A is the base-plate of a sewing-machine containing my improvements, having-an upright standard A erected thereon supporting an overhanging arm A and provided with a hanger A and downwardly-projecting lugs Ah A",'A, A, A and A", having bearings A A, and A therein for supporting parts to be described hereinafter.

B is a shaft provided with a crank B and mounted in suitable bearings in the standard A and arm A of the machine, and will be hereinafter referred to as the main shaft.

C is a driving-shaft mounted in the bearings A A in the lugs A A This shaft operates both the shuttle-driving mechanism and the feeding mechanism of the machine.

D is a rock-shaft mounted at each end and parallel to the shaft 0 by means of pointscrews D, tapped through the lugs A A.

E is a feedbar having a transverse slot E therein and provided with a feed-dog E, projecting above its upper edge and mounted in the slideway E formed by the hanger A and lug A on the base-plate A.

E is a crank-arm connecting the rock-shaft D with the feed-bar E, one end E of such crank-arm E being fast to the rock-shaft D, and the other end E thereof being connected, by means of a pivot E, with the feed-bar E.

F is a rock-shaft-actuating arm arranged parallel to the feed-bar E and having a transverse slot F therein.

F is a crank-arm connecting the rock-shaft D with the rock-shaft-actuating arm F, one end F of such crank-arm F being fast to the rock-shaft D and the other end F thereof being connected, by means of a pivot F, with the rock-shaft-actuating arm F.

G is a feed-regulating lever having a slotted way G therein and pivotally mounted in a fixed bearing A by means of a pintle G G is a nut applied to the free and correspondingly-threaded end of the lever G for securing the same at any desired angle of inclination by turning it down upon the curved edge of the bearing Gr on the base-plate A.

H is a roller or other stud projecting transversely from the free end portion of the arm F into the slotted way Gr in the feed-regulating lever G and cooperating therewith in the manner and for a purpose to be explained hereinafter.

I is a crank-wheel having an elongated radial socket I thereon and mounted fast on the driving-shaft C.

I is a pitman pivoted at its upper end to the crank B on the main shaft B and provided at its lower end with a roller-stud 1", projecting transversely therefrom into the socket I in the crank-wheel I.

I is a link pivotally connecting the pitman I between its ends and at I to a pivot-bearing I on the standard A of the machineframe. i

J is a triangular curved feed-bar eccentric mounted fast on the driving-shaft O and in the transverse slot E in the feedbar E.

J is atriangular curved rock-shaft-actuating arm-eccentric mounted fast on the driving-shaft C and in the transverse slot F in the rock-shaft-actuating arm F.

The function of the eccentric J is to move the feed-bar E, with its feed-dog E, alternately upward and downward at predetermined times. The function of the eccentric J, cooperating with the way G in the feedregulating lever G, is to move the rock-shaftactuating arm F alternately and longitudinally inward and outward at predetermined times, thereby communicating, through the crank-arm F, rock-shaft D, and crank-shaft E, corresponding inward and outward movements of the feed-bar E.

The eccentrics J J are so arranged on the driving-shaft C that their consecutive operations will be as follows: The former, J, will move the feed-bar E upward. The latter, J, acting in conjunction with the slotted feed-regulating lever G and through the parts F, F, I), and E will move it inward. The former, J, will move it downward, and the latter, J, acting in conjunction with the slotted feedregulating lever G and through the parts F, F, D, and E will move it outward to its starting-point.

K is a disk secured transversely to the lefthand. end of the driving-shaft C and serves, in connection with the outer end of the bearing A on the base-plate A, as a means of maintaining the feed-bar E in accurate engagement with the periphery of the eccentric J.

When the feed-regulatinglever G is in the position shown in Fig. 3 and the eccentric J is rotated, the joint operation of the slotted way G therein and of such eccentric will be to produce the maximum length of longitudinal reciprocations of the rock-shaft-actuating arm F and acting through the rock-shaft D of the feed-bar E. In proportion as the lever G is made to approach a horizontal position the longitudinal reciprocations of the rock-shaft-actuating arm F and feed-bar E will be minimized in length.

The remaining unlettered parts (shown in Fig. l of the drawings) belong to the shuttledriving mechanism of the machine and are fully shown, described, and claimed in Letters Patent of the United States, No. 692,843, issued to myself February 11, 1902. Said unlettered parts need not be regarded in order to fully understand the invention herein described and claimed.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In feeding mechanism for sewing-machines, in combination, a feed-bar and a rockshaft-actuating arm arranged parallel to each other and having transverse opposite slots therein, a driving-shaft extending through the slots in such bar and arm, a rock-shaft parallel to the driving-shaft, crank-arms connecting the rock-shaft with the feed-bar and rockshaft-actuating arm, a pivoted feed-regulat ing lever having a slotted way therein, a stud projecting transversely from the free end portion of the rock-shaft-actuating arm into the way in the feed-regulating lever, atriangular curved feed-bar eccentric-mounted on the driving-shaft and in the slot in the feed-bar, a triangular curved rock-shaft-actuating arm-eccentric mounted on the driving-shaft in the slot in the rock-shaft-actuating arm, the eccentrics and Way in the feed-regulating lever being so located and arranged that their joint and consecutive operations will move the feedbar successively upward, inward, downward and outward, substantially as and for the purpose specified.

2. In feeding mechanism for sewing-machines, in combination, a feed-bar and a rockshaft-actuating arm arranged parallel to each other and having transverse opposite slots therein, a driving-shaft extending through the slots in such bar and arm, a rock-shaft parallel to the driving-shaft, crank-arms connecting the rock-shaft with the feed-bar and rocksh'aft-actuating arm, a pivoted feed-regulating lever having a slotted way therein, a stud projecting transversely from the free end portion of the rock-sh'aft-actuating arm into the way'in the feed-regulating lever, a triangular curved feed-bareccen-tric mounted on the driving-shaft and in the slot in the feed-bar, a triangular curved rock-shaft-actuating arm-eccentric mounted on the driving-shaft in the slot in the rock-shaft-actuating arm, the slotted way in the feed-regulating lever being so located and arranged that, acting through the stud on the rock-shaft-actuating arm, the

movement of such lever on its pivot will lengthen or shorten the longitudinally-reciprocating movements of the rock-shaft-actuating arm and feed-bar of the machine, substantially as and for the purpose specified.

3. In feeding mechanism for sewing-machines, in combination, a feed-bar and a rockshaft-actuatin-g arm arranged parallel to each other and having transverse opposite slots therein, a driving-shaft extending through the slots in such bar and arm, a rock-shaft parallel to the driving-shaft, crank-arms connecting the rock-shaft with the feed-bar and rock-shaft-actuating arm, a pivoted feed-reg ulating lever having a slotted way therein, a stud projecting transversely from the free end portion of the rook-shaft-actuating arm into the way in the feed-regulating lever, a triangular curved feed-ban eccentric mounted on the driving-shaft and in the slot in the feed-bar, a triangular curved rock-shaft-actuating arm-eccentric mounted on the driving-shaft in the slot in the rock-shaft-actuating arm, a main shaft parallel to the driving shaft and provided with a crank, a crank wheel having an elongated radial socket therein and mounted on the driving-shaft, a pitman pivoted, at its upper end, to the crank on the main shaft and provided, at its lower end, witharoller-stud projecting transversely therefrom into the socket in the crank-wheel, substantially as and for the purpose specified.

4:. In feeding mechanism for sewing-machines, in combination, a feed-bar and a rockshaft-actuating arm arranged parallel to each other and having transverse opposite slots therein, a driving-shaft extending through the slots in such bar and arm, a rock-shaft parallel to the driving-shaft, crank-arms connecting the rock-shaft with the feed-bar and rock-shaft-actuating arm, a pivoted feed-regulating lever having a slotted way therein, a stud projecting transversely from the free end portion of the rock-shaft-actuating arm into the way in the feed-regulating lever, a triangular curved feed-bar eccentric mounted on the driving-shaft and in the slot in the feed-bar, a triangular curved rock-shaft-actuating armeccentric mounted on the driving-shaft in the slot in therock-shaft-actuating arm, a main shaft parallel to the driving-shaft and provided with a crank, a crank-wheel having an elongated radial socket therein and mounted on the driving-shaft, a pitman pivoted, at its upper end, to the crank on the main shaft and provided, at its lower end, with a rollerstud projecting transversely therefrom into the socket in the crank-wheel, and a link pivotally connecting the pitman, between its ends, to a pivot-bearing on the standard of the machine-frame, substantially as and for the purpose specified.

5. In feeding mechanism for sewing-machines, in combination, a feed-bar E and a rock-shaft-actuating arm F having transverse opposite slots E and F therein, a drivingshaft C extending through the slots E and F in the bar E and arm F, a rock-shaft D, crank-arms E and F connecting the rockshaft D with the feed-bar and rock-shaft-actuating arm, respectively, a feed-regulating lever having a way Gr therein and pivotally mounted, on a fixed bearing, by means of a pintle G a roller-stud H projecting transversely from the free end portion of the arm F into the way G in the feed-regulating lever G, a triangular curved eccentric J mounted on the driving-shaft C and in the slot E in the feed-bar E, a triangular curved eccentric J mounted on the driving-shaft C and in the slot P in the rock-shaft-actuating arm, and means for rotating the driving-shaft C,

substantially as and for the purpose specified.

In testimony whereof I have signed my name to this specification 1n the presence of two subscribing witnesses.

WILLIAM 0. FREE.

Witnesses:

L. L. MORRISON, NELLIE E. ENNETT.

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