US688193A - Presser-foot mechanism for shoe-sewing machines. - Google Patents

Description

No. 688,l93. Patented Dec. 3, l90l.

E. NURMANCUT.

PBESSER FOOT MECHANISM FOR SHOE SEWING MACHINES.

(Application filed Oct. 28, 1901.) (No Model.) 2 Sheets-8hegt I.

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No. 688,!93. Patented Dec. 3, 190i. E. NORMANUUT.

PRESSER FOOT ECHANISM FOR SHOE SEWING MACHINES.

(Application filed Oct. 28, 1901.)

(No Mqdel.)

.2"sheats-sheet 2.

r'rnn STATES PATENT Orrrcn.

ENOCH NORMANOUT, OF MONTREAL, CANADA, ASSIGNOR TO THE COLUMBIA WIRE SEWING LOOK STITCH MACHINE 00., LIMITED, A CORPORATION OF MAINE.

PRESSER-FOOT MECHANISM FOR SHOE-SEWING MACHINES.

SPECIFICATION forming part of Letters Patent N 0. 68 8,193, dated December 3, 1901.

Original application filed April 14, 1898, $eria1 No. 677,634. No. 80,291.

To CLZZ whom it may concern:

Be it known that LENocH NORMANCUT, a subject of the King of Great Britain, residing at Montreal, Province of Quebec, Dominion of Oanada,have invented certain new and useful Improvements in Shoe-Sewing Machinery; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in to the art to which it appertains to make and use the same.

My invention relates to improvements in shoe-sole-sewing machines,and has particular relation to mechanism for regulating and controlling the pressure of the pressure-bar on the shoe-sole during the sewing operation, being a divisional application of that filed by me April 14, 1898, Serial No. 677,634.

The object of the invention is to provide, primarily, a means for controlling the amount of pressure placed on the shoe-sole by the pressure-bar, said means preventing the application of excessive pressure. A further object is the provision of means for locking the pressure-bar in position after the amount of pressure has been regulated. Other objects will be hereinafter made clear.

To these and other ends the invention c011- sists in the improved construction and combination of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims.

In the drawings,in which similar characters of reference indicate similar parts in all of the views, Figure 1 is a side elevation of a portion of a sewing-machine head, showing the rocking-lever, its cam, and other necessary operating parts. Fig. 2 is a central longitudinal sectionalview of the head. Fig. 3 is a horizontal sectional View taken on the line 3 3 of Fig. 2. Fig. 4 is a front elevation of the head with the face-plate removed. Fig. 5 is a detail sectional view showing a means for permitting the pressure of the rocking lever to be controlled.

In shoe-sewing machines of the type shown in said application above set forth, in which the needle operates from the shoe-horn, the

Divided and this application filed October 28, 1901. Serial (No model.)

stitching being on the inner portion of the sole, a pressure-bar must be provided capable of withstanding the pressure of the needle while being inserted, and as the shoe-horn is held against a vertical movement to release this pressure when the work is to be fed the pressure-bar must be capable of a movement which will release the shoe from such pressure during the feeding movement. Hence the provision of a reciprocating pressure-bar. Owing to the fact that shoe-soles vary in thickness it will be readily understood that a fixed movement of the pressure-bar (normally an essential feature) will be disadvantageous where the thickness of the sole is excessive and that provision must be made for relieving the sole from the excessive pressure without changing the solidity of the pressureresisting qualities of the pressure-bar when in position to hold the shoe during the stitching operation. It is the purpose of this invention to provide a structure of this character.

In the drawings, I designates the head of a shoe-sewing machine, having at its front a guide 21 provided with a vertical slot i for the reception of the slidable pressure-foot 2' The guide 2' is provided with a transverse slot 2' which communicates with the vertical slot 2' and serves to allow of the passage of the pressure-bar lever (rocking lever) and the sliding wedge k which serves to coact with the rocking lever to form a support for the pressure foot 2' as well as to control the length of movement of the upright needle, the latter function not being described herein, as it forms no partof the present invention.

The pressure-foot 2'" consists of a slide-bar 2', adapted to slide within the vertical slot 2 and has its lower end provided with a ren1ovable pressure-plate 2". The slide-bar 2" is also provided with a vertical slot i within which is adapted to slide the adjustment-slide 11", which is in turn provided with a vertical slot 21 which communicates with the slot 2' in the guide 2?. The upper end of the adjust- 5 ment-slide 2' is provided with a slotted opening 2', having its lower end enlarged for the reception of the head of the adj usting-screw g scares 1' which serves to raise and lower the adlated on its pivot j by means of the roller justment-slide t in the vertical slot 1' The connection j riding up the inclined face of upper end of the sliding bar i is provided the groove in the cam 6 this movement of 70 with a screw-threaded opening 1' within the rocking lever serving to force the preswhich the pressure-releasing screw i is sure-bar downward on the face of the sole adapted to have movement, said screw i which is to be sewed. As the thickness of being provided with a screw-threadcd openthe sole is sometimes greater than the dising within which the adjusting-screwt' has tance between the upper face of the shoe- 75 its movement. Adjusting-nuts 11 are mounthorn and the lower face of the pressure-bar ed on the said adjusting-screw 73 one of when the latter is in its lowermost position, which is provided with an operating-handle to some extent, and as the movement of the 2' A suitable lock-nut 2' is provided to rerear end of the lever J is the same in all cases, tain the adjusting-screw i in position after where this is the case an excessive pressure 80 having been adjusted. would be applied on the face of the sole and 1' designates a removable face-plate prodestroy the even surface by indenting. To vided with a vertical slot 1' having cornprevent this, the hinged joint j is provided, munication with the slots t 71 as above described, this construction ena- B designates the operating-shaft of the mabling the rear end of the rocking lever J to 85 chine, extending vertically through the body move upward to its upper position while the 20 and head thereof, and on which is mounted a lower face of the pressure-bar rests on the side cam Z1 within which one end of a pivsole of the shoe without increasing the presotally-mounted rocking lever J is adapted to sure on the sole, the front end of the lever have operating connection by means of a suitremaining stationary, the blockj" being forced 9o able pin and roller-stud j, operating in the upward against the action of the spring as grooved face of the cam. The opposite end the rollerj passes up the inclined face of the of the lever J extends forwardly into and groove on the cam 6 and when the pressure through the slots '6 i and 2', the adjuston the sole exceeds the resistance of the block ment-slide 11 normally resting on the upper j, which resistance is regulated by the shape 95 face of the forward end of said lever. Beof the opening. After the roller j has passed tween the pivotal pin j of the rocking lever up the inclined face of the cam 19 and the and the front end thereof the lever is propressure of the lever is applied to the presvided with a hinged joint 7' the construction sure-bar the wiper'cam b passes beyond conbeing such as to form an opening j having tact with the wiper 7c, and the spring it? forces IOO oppositely-inclined sides at the top of the lethe slide K rearward until the inclined face ver, this openingj being adapted to receive of the sliding wedge k binds against the lower a suitable friction-block j", normally held in face of the lever J and the lower face of the contact with the inclined sides of the opening slot 71 forming a member between the rockby means of a springj ing leverand the pressure-bar which contacts 105 To the top of the cam 19 is secured a suitwith both, and thereby providing practically 4o able wiper-cam b, which is adapted to ride a solid portion against which the pressure of against the face of a wiper is, formed on the the upright needle is exerted. There is thereend of a slide K, mounted to have longitudifore a locking of the pressure-bar in position, nal movement in the head I. Iivotally conand which remains unbroken until the wiper- 11o nected to the front end of the slide K is a cam again comes into contactwith the Wiper sliding wedge it the front end of which ex- 70 on its next revolution, it being understood, tends through the slots of", 2' and 2' below of course, that an upward movement of the the front end of the rocking lever J. In orpressure-bar takes place when the rollerj d er that the slide K may have a quick action passes again to its low position on the cam 115 when released from contact with the wiper- 19 this movement raising the rocking lever,

earn 1) I provide an actuating-spring kflwhich wedge, and pressure-bar.

serves to force the slide K toward the shaft B. I do not limit myself to the precise eon- As shown in the drawings, the front end of struction of automatic pressu re-regulating the lever J and the sliding wedge 7.3 practidevice herein described, but claim the right no cally fill the slot 7 when the pressure-bar i to use any suitable mechanism for that puris in its upper position, which is when the pose.

side cam 19 begins its period of rest. This Having thus described my invention, what serves to hold the pressure-bar i above the I claim as new iswork to be done and allows of the insertion 1. A machine for sewing shoes comprising 125 Of the work on the shoe-horn or permits of ahead; a pressure-bar mounted to havea verthe feeding of the work between stitches. As tical movement therein; a rocking lever havthe cam b carrying the wiper-cam b ,is roing a fixed movement on said head, adapted tated the wiper-cam b contacts with the to reciprocate said pressure-bar; and a fricwiper k and causes the slide K and the slidtional pressure-regulating mechanism mount- I 3c in g wedge 10 to be moved forward against the ed in said rocking lever,whereby the pressure action of the spring thus releasing the adof said pressure-bar will be automatically justing-slide i from its locked position. Afregulated. ter this is done the rocking lever J is oscil- 2. A machine for sewing shoes comprising a pressure-bar; a rocking lever for imparting movement to said pressure-bar; means for imparting movementto said lever; and means for automatically relieving the excess pressure placed on said pressure-bar by said lever.

3. A machine for sewing shoes, comprising a head; a pressure-bar mounted to have a vertical movement therein; means for reciprocating said pressure-bar vertically; and means for automatically relieving the excess pressure caused by the thickness of the shoe sole.

4. A machine for sewing shoes, comprising a head; a pressure-bar mounted to have a vertical adjusted movement therein; means for adjusting the position of said pressure-bar vertically in said head; means for imparting a vertical reciprocating movement to said pressure-bar; and means for automatically relieving the excess pressure caused by the thickness of the shoe-sole.

5. A machine for sewing shoes, comprising a head; a pressure-bar mounted to have a vertical movement therein; means for reciprocating said pressure-bar vertically; means for automatically relieving the excess pressure of said pressure-bar caused by the thickness of the shoe-sole; and means for locking said pressurebar in posit-ion after being reciprocated.

6. A machine for sewing, shoes, comprising in its construction a head; a pressure-bar mounted to have a vertical movement therein; means for reciprocating said pressure-bar vertically within said head; means for automaticall y relieving the excess pressure of said pressure-bar caused by the thickness of the shoe-sole; and means for automatically looking said pressure bar in a fixed position after being reciprocated.

A 7. A machine for sewing shoes comprising a head; a pressure-bar mounted to have a vertical movement therein; a rocking lever pivotally connected to said head and adapted to reciprocate said pressure-bar vertically; means for automatically relieving the excess pressure of said pressure-bar caused by the thickness of the shoe-sole; and means for automatically locking said pressure-bar in fixed position relative to said rocking lever after having been reciprocated.

8. A machine for sewing shoes, comprising a head; a pressure-bar mounted to have a vertical movement therein; means for reciprocating said pressure-bar; means for relieving the excess pressure of said pressure bar caused by the thickness of the shoe-sole; and means for locking said pressure-bar in position after being reciprocated.

9. A machine for sewing shoes, comprising ahead; a pressurebar mounted to have a vertical movement therein; means for adjusting the'position of said pressure-bar; means for reciprocating said pressure-bar; means for re lievin g the excess pressure from said pressure-bar caused by the thickness of the shoesole; and means for automatically locking said pressure-bar in fixed position after the same has been reciprocated.

10. A machine for sewing shoes comprising a head; a pressure-bar mounted to have vertical movement therein; an adj ustment-slide adjustably mounted in said pressure-bar; means for reciprocating said pressure-bar and said adjustment-slide; means for automatically relieving the excess pressure of said pressure-bar caused by the thickness of the shoe-sole; and means for locking said pressure-bar and said adjustment-slide in fixed position after having been reciprocated.

11. A machine for sewing shoes comprising a head; a pressure-bar mounted to have a vertical movement therein; an adj ustmentslide adjustably mounted in said pressure-bar; a rocking lever pivotally connected to said head and adapted to reciprocate said adj ustment-slide and said pressure-bar; means for automatically relieving the excess pressure of said pressure-bar caused by the thickness of the shoe-sole; and means for locking said rocking lever in fixed position in said adjustment-slide.

12. A machine for sewing shoes comprising a head a pressure-bar mounted to have a vertical movement therein; means for actuating said pressure-bar; means for adjusting the position of said pressure-bar; and means for relieving the excess pressure placed on said pressure-bar.

13. A machine for sewing shoes comprising a head; a pressure-bar mounted to have a vertical movement therein; means for actuating said pressure-bar; means for regulating the position of said pressure-bar; and means for automatically equalizing the pressure of said pressure-bar, regardless of the thickness of the shoe-sole.

14. A machine for sewing shoes comprising a head; apressure-bar mounted to have vertical movement therein; a rocking lever-having a fixed movement on said head and adapted to reciprocate said pressure-bar and means connected to said rocking lever for automatically equalizing the pressure applied to said pressure-bar by said rocking lever.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

ENOOH NORMANOUT.

\Vitnesses:

J. A. MARION, T. MYNARD.

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