US617038A - Heel-trimming machine - Google Patents

Description

0. mass. Pa tented 1a".- a, I899.

A. McDOWELL. HEEL TRIMMING MACHINE.

(Application filed Nov. 2!). 1896.)

3 Sheets-Sflwet I.

(No Model.)

No. 6|7,038. Patented Ian. 3, 1899.

A. MCDOWELL. HEEL TRIMMING MACHINE.

(Application flied Nov. 20, 1896. (No Model.) 3 Sheets-8heet 2.

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No. M23038. Patented Ian. 3, 1899.

A. McDOWELL.

HEEL TBIMMING MACHINE.

(Application filed Nov. 20, 1896.) (Nu Madam 3 Sheets-Sheet 3.

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ll'nrrnn STATES PATENT ALEXANDER MCDOIVELL, OF LYNN, MASSACHUSETTS.

HEEL-TRIMIVIING MACHINE.

SPECIFICATION forming part of Letters Patent No. 617,038, dated January 3, 1899.

Application filed November 20, 1896. Serial No. 612,815. (No model.)

To all whom, it may concern.-

Be it known that I, ALEXANDER MCDOW- ELL, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts,have invented certain new and useful Improvements in Heel-Trimming Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates particularly to the devices which are employed in heel-trimming machines for supporting and adjusting the guards which are used in connection with the cutters.

The object of the invention is to provide an improved construction and arrangement of the devices by means of which the said guards are supported and adjusted.

The invention will be described first with reference to the accompanying drawings, in which I have represented the best embodiments thereof which I have yet contrived, and the distinguishing characteristics thereof will be particularly pointed out and distinctly defined in the claims at the close of this specification.

In the drawings, Figure l is a view in plan of mechanism embodying my invention. Fig. 2 is a view in elevation looking from the lefthand side in Fig. 1. Fig. 3 is a view partly in elevation from the right-hand side in Fig. 2 and partly in vertical section on the dotted line 3 3 in said figure; and Fig. at is a view in elevation, looking from the front in Fig. 2, of the cutter-shaft, the supports therefor, the heel-rest, which last is omitted from the other views for the sake of clearness, and the supporting means for the top-lift guard, the cutter being omitted, as well as the counterguard and its supporting arrangements, for the sake of clearness.

1 is the framing of the machine, and 2 is the cutter-shaft, it rotating in bearings,which are provided at 3 3. At 4: is a pulley mounted upon the said shaft for the purpose of actuating the same, and at 5 is a cutter secured upon one end of the said shaft. At 51 is a heel-rest of usual character. At 6 is a toplift guard located adjacent to the said cutter 5. Sometimes the top-lift guard is fixed or non-rotatable, while in other cases it is made fast with the cutter and rotated with it. This latter arrangement is found objectionable in practice for various reasons. It has been proposed heretofore to use a rotatable top-lift guard which is mounted loosely on the cuttershaft, so as to turn independently of the said shaft, at least when the top lift of the heel of a shoe is placed in contact with the said top-lift guard. This arrangement has some advantages which cause it to be adopted in some instances. A disadvantage incident to mounting the toplift guard loosely upon the cutter-shaft, as just noted, is the fact that the eye or central opening of the top-lift guard soon wears in consequence of the rotation of the cutter-shaft within the same, so that the fit between the said eye and the cutter-shaft is destroyed.

One object of the present invention is to obviate the wear just mentioned. To this end I mount the hub 7 upon the exterior of a sleeve or independent bearing 8, which latter is suitably supported in the desired position. This independent bearin g holds the rotatable top-lift guard 6 out of contact with the cutter-shaft, so that wear of the top-lift guard in consequence of the rotation of the cuttershaft in contact with the inner portions or eye of the rotatable top-lift guard is completely obviated.

Another object of the invention is to provide means whereby to compensate for variations in the size of the cutter due-to grinding away the cutting edges of the blades of the same for the purpose of sharpening such blades. This grinding is found necessary at intervals. The grinding away of the cutting edges of the blades of the' cutter occasions a reduction in the diameter of the cutter. Heretofore it has been found necessary to compensate for this reductionin the diameter of the cutter by grinding away the top-lift guard to reduce its diameter, so that it shall correspond with the reduced diameter of the cutter. In order to obviate the necessity of grinding away or otherwise altering the diameter of the top-lift guard, I provide means whereby to adjust the top-lift guard relatively to the cutter, so that after the cutter has been sharpened a slight adjustment of the toplift guard will bring its edge into proper working position with relation to the cutter. The sleeve orindependent bearing Sis formed on or applied to an arm 9, which is held by a pivotal pin or bolt to the support 11. The said support is applied to or secured upon any convenient fixed part of the machine. In the illustrated embodiment of the invention I have represented the said support as having an opening therethrough to enable it to be passed upon the projecting end of the bushing or sleeve 12, which furnishes one of the bearings for the shaft 2, the said arm being split, as at 13, and provided with a bolt 14, by means of which its parts may be drawn together to clamp the support in the desired position upon the sleeve 12. This mode of applying the support enables it to be adjusted an gularly into any desired position, so that it may be turned either downwardly into a vertical position, as shown, or upward into a vertical position, if deemed necessary. With the said arm 9 I combine means whereby to adjust the same upon the support 11 so as to bring the top-lift guard 6 into the desired position relatively to the cutter 5, whereby the edge of the said toplift guard may be made to correspond in position at the working point with the edge or periphery of the cutter. Thus I apply to the arm 9 an adjusting-screw 15, the threaded stem of which enters a threaded aperture in the arm, and either the prolonged tip of the said screw or a pin 16, located in a continuation of the recess 17, in which the stem of the screw is located, acts against a fixed projection 18, applied to the support 11. A spring 19, applied to the arm 9, also acts upon the said projection 18. The said spring 19 acts with a tendency to force the arm and sleeve laterally in one direction, while the said screw or screw 15 and pin 16 serve as a means of adjusting the arm and sleeve positively in the other direction. For the purpose of locking the arm 9 after having been adjusted transversely through the aid of the screw 15 I apply to the support 11 a set-screw 20, which latter acts against a pin 21, which projects from the arm 9 into a slot or opening 22 in the support 11. Since the said set-screw 2O acts against the pin 21 with a tendency to force the said pin and the arm 9 in one direction, while theadjusting-screw 15 and pin 16 act against the stopor projection 18 with a tendency to force the arm in the other direction, it is obvious that when the screw 20 has been turned up sufficiently the arm 9 will be held clamped in the desired position. In order to effect conveniently an adjustment of the arm 9 at right angles to that which is effected by means of the screws 15 and 20, I provide the said arm with an eccentricallydisposed bearing or connection with its support, the said eccentric hearing or connection having capacity for rotary adjustment. In the drawings I have shown the pivotal pin or bolt as having applied to the threaded end thereof the nut 23, an extension 231 of which enters an opening or hole 2% in the support 11, that is provided for the reception of the said extension 231. The said extension 231 is bored eccen trically for the reception of the bolt 10. The extension 231 constitutes, in effect, an eccentric or bolt 10, and when thebolt and nut are rotated together the arm 9 is ad justed upon the support 11 at right angles to the adjustment secured by means of the screws 15 and 20, as stated above. At is a binding-screw to hold the nut 23 in the desired position of adjustment. This adj ustment, effected, as described, by means of the eccentric bearing or connection for the arm 9, enables the arm and its sleeve, with, of course, the top-lift guard, to be raised or lowered as required in order to bring the edge of the toplift guard in the proper position with relation to the periphery of the cutter at the desired working point.

As will be obvious, the described means ofsupporting and adjusting the top-lift guard are equally applicable to other known forms of such guard than that shown and may be adapted for use in connection therewith in an obvious manner not necessary to be explained herein. This portion of the invention is capable also of being employed in connection with the counter-guard of a heel-trimming machine. I prefer to support and adjust the counter-guard 26in the manner which I will proceed to describe. The arm 91, having applied thereto or formed thereon the in* dependent bearing on which the hub of the counter-guard 26 is mounted, is connected by a stud 27 to one end of the bar 28, which latter slides longitudinally in the solid socket 29 upon the block 30 and is provided with an adjusting-screw 31,havi-ng a milled head, by means of which it may be given the desired position. By turning the adjustingscrew the said bar 28 may be adjusted horizontally with reference to the cutter. The bar 28 is forked or recessed to receive the arm 91, and to the portions of the said bar above and below the said arm are applied adjusting-screws 32, acting in opposite directions against the said arm. By means of the said screws 32 32 a vertical adjustment of the arm and counter-guard relativelyto the cutter may be secured. The socket 39 is slotted longitudinally, as at 33, and through the slot passes a screw 34:, the threaded end of which enters a threaded hole in the bar28, while the head thereof is adapted to bear upon the upper surface of the socket 29 or an intermediate washer. By means of the said screw 34 the bar 28 may be locked in any desired position of longitudinal adjustment. To the bar 28 is applied a flat spring 35, one end of which bears upon the hub of the counter-guard 26. Byits engagement with a flange 36, thatis formed upon the said hub, the said spring 35 prevents the counter-guard from accidentally changing its position or becoming detached from the independent bearing that is provided therefor upon the arm 91. This spring 35 is held to the arm 28 by a screw 37, by means of which screw the spring may be caused to bear with more or less force upon the hub of the counter-guard, or the pressure of the said spring upon the said hub may be relieved altogether. The said screw and spring provide means for producing an adjustable drag upon the counter-guard. In other words, I provide thereby a tension-regulatin g device by means of which to retard the rotation of the counter-guard.

In working upon certain classes of goods, such as heavy rough boots and shoes, it frequently is preferred that the counter-guard should be fixed or stationary. -By means of the device which I have j ust described the rotating counter-guard may be prevented from turning or rotating when working upon the said classes of goods. In handling more delicate grades of boots and shoes it is desired that the coun tor-guard should rotate in order to prevent marking, and thereby damaging the goods. In dealing with thisclass of goods the pressure of the spring upon the hub of the counter-guard may be reduced or relieved entirely, so as to permit the guard to move as freely as desired.

Heretofore it has been customary to employ a shield, which has been amxed to the side of the cutterand caused to rotate therewith. This shield under certain conditions occasions more or less injury to the boots and shoes which are being trimmed. In accordance with one part of the present invention I form at the edge of the counter-guard 26 a lip 267, which passes into the space between the counter and the rand of the shoe being operated upon, and thereby constitutes of the counterguard 26 both a counter-guard and a shield. The lip 267 serves the function which the shield heretofore has served. This part of the invention is of value for use in connection chiefly with cutters having lips for the purpose of trimming the rand, and in practice the lipped counter-guard will be so adj usted relatively to the cutter as that the lip of the cutter shall lie within the lip of the counter-guard.

The block 30 is pivoted at 38 upon the block 39, the latter having a sleeve-like socket 40 to fit upon the round bar or spindle 41, which latter at its outer end is screw-threaded to receive the nut 42, by means of which the block 39 is held in place upon the said spindle or bar 41. At 43 is a coiled spring, placed between the block 39 and the collar 44 upon the spindle or bar 41, which latter is conveniently secured to the framing 1. At 45 is a bindingscrew applied to the block 39, the inner end of which screw bears against the spindle or bar 41 to lock the block 39 in the desired position of adjustment.

To the pivoted block 30 I apply a lockingbar 46, the said locking-bar 46 being secured against the edge of the said block 30 by means of a screw 47, which last serves as a pivot on which the said locking-bar is free to move vertically.

48.is a spring secured to the block 30 by a screw 481 and operating upon the locking bar 46 with a tendency to depress the same.

49 is a hook that is secured to the block 39, it having a sloping end up which the lockingbar 46 is adapted to ride as the block is swung from the left to the right in the drawings, the said locking-bar being depressed by spring 48, behind the shoulder of the said hook 49, as soon as it has reached the proper working position. This locking -bar and hook serve to retain the pivoted block 30 and counter-guard 26, mounted thereon, in the required position for work, but enables the said block and the counter-guard to be swung to the left in the drawings wheneverit is desired to secure access to the cutter or to remove thev counter-guard from its support. At 50 is a guiding-screw, which passes through a vertical slot 501 in the locking-bar, and at 51 is an adj Listing-screw, passing through a threaded hole in the locking-bar and bearing against the edge of the pivoted block 30. By means of the adjusting-screw 51 the free end of the locking-bar 46 may be adjusted from the edge of the pivoted block 30 as far as may be required in order to take up all play of the said pivoted block and hold the opposite edge of the said block against the stop-plate 52, that is secured to the block 39.

The locking devices just described and the provisions for adjustment which are combined therewith prevent all looseness and uncertainty in the position of the block 30 and the counter-guard which is carried thereby.

I claim as my invention-- 1. In a heel-trimming or the like machine, the combination with the cutter, its shaft, and a guard applied to the said cutter, of a carrier to which the said guard is applied, and means to adjust the said carrier and guard in a transverse direction with relation to the cutter, and also vertically at right angles to such direction but still transversely with relation to the cutter, substantially as described.

2. In a heel-trimming or the like machine, the combination with the cutter, its shaft, and a rotatable guard applied to the isaid cutter, of the pivoted arm on which the said guard is mounted, means to adjust the said arm transversely on the pivot thereof with relation to the cutter, and means whereby to adjust the position of the arm and guard lengthwise of the arm relatively to the cutter, substantially as described.

3. In a heel-trimming or the like machine, the combination with the cutter, its shaft, and a rotatable guard for the said cutter, of the independent bearing for the said rotatable guard, the support for the said independ ent bearing, and devices for adjusting the said support transversely with relation to the cutter, substantially as described.

4. In a heel-trimming or the like machine, the combination with the cutter, its shaft,

IIO

and a rotatable guard for the said cutter, of the independent bearing for the said rotatable guard, the arm on which said bearing is provided, the devices for adj usting said arm transversely with relation to the cutter, and the eccentric bearing or connection for the said arm whereby to adjust the arm longitudinally, substantially as described.

5. In a heel-trimming or the like machine, the combination with the cutter, its shaft, and a rotatable guard for the said cutter, of the independent bearing for the said rotatable guard, the arm on which said bearing is provided, the devices for adjusting said arm transversely with relation to the cutter, the eccentric bearing or connection for the said ,arm whereby to adjust the arm longitudinally, and the rotatable or angularly-adjustable support to which the said arm is connected, substantially as described.

6. The combination with the cutter, its shaft, and a rotatable guard, as 26, of an independent bearing on which the said guard is mounted to rotate, and'a drag device bearing'on the hub of said guard, substantially as described.

7. The combination with the cutter, its shaft, and a rotatable guard, as 26, having a hub with a flange 36, an independent bearing on which the said guard is mounted to rotate, and a device to engage with the said flange for the purpose of holding the guard on the bearing, substantially as described.

8. The combination with the cutter, its shaft, and a rotatable guard, as 26, of the independent bearing on which the said guard is mounted to rotate, a drag device bearing on the hub of said guard, and means to vary the pressure of the said drag device upon the said hub, substantially as described.

9. The combination with the cutter, its shaft and a counter-guard, as 26, of an arm, as 91, on which the said counter-guard is mounted, a bar, as 28, to which the said arm is pivoted, means to adjust said bar longitudinally and opposite-acting screws 32, 32, applied to the bar and acting against the arm to adjust it transversely, substantially as described.

10. The. combination with the cutter, its shaft, and the counter-guard, of the pivoted block 30, means to support the counter-guard on the said block, the block 39 on which block 30 is pivoted, the hook 49 applied to the block 39, the vertically-swinging locking-bar 46 pivoted to the edge of block 30 and engaging with hook 46, and the spring acting on the said locking-bar to depress the same, substantially as described.

11. The combination with the cutter, its shaft, and the counter-guard, of the pivoted block 30, means to support the counter-guard on the said block, the block 39 on which' the block 30 is pivoted, the stop 52 and hook 49 on said block 39, the vertically-swinging locking-bar 46 pivoted to the edge of block 30 and engaging with hook 46, the spring 48 acting to depress the said locking-bar,and the screw 50 to adjust the locking-bar relatively to the block 30, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER MCDOXVELL. \Vitnesses:

CHAS. F. RANDALL, WILLIAM A. COPELAND.

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