US725551A - Foot-power. - Google Patents

Description

No. 725,551. PATENTED APR. 14, 1903. 0. H. GENTRY.

FOOT POWER.

APPLIOATION FILED AUG. 9. 1902.

N0 MODEL.

INVENTOR.

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OLIVER HOWARD GENTRY, OF BROOKLYN, NEW YORK 'FOOT-POWER.

SPECIFICATION forming part Of Letters Patent NO. 725,551, dated April 14, 1903.

Application filed August 9, 1902. Serial No. 119,024. (No model.)

To aZl whom it may concern.

Be it known that I, OLIVER HOWARD GEN- TRY, a citizen of the United States of America,

' and a resident of the borough of Brooklyn,

New York city, and State of New York, have invented certain new and useful Improvements in Foot-Power, of which the following is a specification.

My invention relates to foot-power apparatus for driving sewing-machines, lathes, and other light machines; and it consists of improved means for applying the power through the instrumentality of a pendulous treadlecarrying lever to be operated by a swinging motion effected by flexure of the knee-joint rather than the common pedal operated by the ankle-joint,which has some advantages, as hereinafter described, reference being made to the accompanying drawings, in which- Figure 1 is an end elevation/of a sewingmachine stand with my improved power apparatus applied. Figs. 2and 3 are enlarged details of the lower parts of the pendulous lever and treadle. Fig. 4 is a vertical section of the transmitting apparatus geared with the upper end of said lever, the section being taken through the axis of the lever on line 4 4 of Fig. 5. Fig. 5 is partly an elevation of the apparatus of Fig. 4 and partly a transverse s'ection online y y. Fig. 6 represents details of the driving clutch-pinions.

A represents a part of one end frame of the stand. a represents a short shaft fitted in a bushing I), mounted in said part A of the frame and securely clamped'by its flangehead 0 and the disk nut 61, the latter, being screwed onto the screwhreaded inner end of the bushing.

The flange o carries a socket 6, wherein.

bearing-balls f are placed, and a driving-pulley g, carried on the outer end of shaft a, has

a cone h, forming the complement of a ballbearing for the outer extremity of said shaft ct. Near the other extremity of said shaft a it carries a spur-toothed wheel 2', which is inclosed in a cover j, the rim of which closely fits on the periphery of the disk nut d, by which the cover is centered relatively to the bore'of bushing 17, and the rim ofsaid cover has a flange 70, by which it is bolted to frame A, with intermediate packing for retaining lubricating-oil. Said rim of the cover is also slotted in the upper side at Z for clearance for.

whereon the pendulous lever 0 is mounted,

said stud being in the axis of shaft a and having a socket p, which is the socket for a ball-bearing for the inner end of shaft a, of which q represents the balls and r the cone, said cone being secured by a nut s, screwed on the shaft. cover 11, boltedonto the end of pivot n.

Above the pivot 41 lever 0 carries two spurtoothed segments a a, respectively, gearing with pinions w w, mounted on the pivot-stud m said pivot-stud beinga fixture in the frame A, to which it is secured by the disk head-z and the nut 2, screwed on the end of t'he stud.

To the hub of the pinion w a wheel is attached having a spur-toothed rim 4, gearing with wheel 2', and a bevel-toothed rim 5, gearing with the bevel-pinion 6, located above pinions w won the vertical pivot-stud 7, supported by the bracket 8, attached to frame- The socket n is closed by a riphery of the hub and clutch-rollers 12 in 1 the notches, whereby the clutch engages for driving when the hub moves in one direction and disengages when the hub moves in the otherdirection, and the clutch-notches of the respective hubs are arranged in reverse of each other, as represented in Fig, 6, whereby.- .through the 'instrumentality of the wheels 3 and 9, alternatelydriven forward in'opposite,

directions and engaging pinion 6 on opposite sides of its pivot, continuous forward motion is communicated to shaft aand pulley g,

which give motion through the belt 13 to the pulley 14 of the sewing-machine shaft or tothe spindle or other high-speed object to be driven.

Under the lever 0 I have provided a guidechannel 15 for the lower end of said lever, with an antifriction-roller 16 on a stud in the end of the lever for eoonomizing friction against the side walls of the channel. The

said channel is carried on a bracket 17, bolted onto the framepiece B, in which there is a vertical slot 18 for the bolt 19, allowing the bracket to be shifted up and down to adjust it with relation to the lever. The bolt 19 also traverses a slotted bracket 20, in which one end of the end-frame connecting-rod 21 has a bearing at 22, which bracket is clamped to the end frame-piece B by said bolt. Said bolt may be shifted in the slot of this bracket to adjust the guide-channel.

The pedal 23 is connected to the lever 0 by a cranked rod 24, allowing the pedal to be shifted forward and backward to suit the operator, said rod having a collar 25 and a nut 26 on the part connected with the lever 0 for clamping the lever and holding the pedal in the positions in which it may be set.

At 27 I represent a coiled spring, the purpose of which is to retract the lever, as indicated in Fig. 1, when released from the foot of the operator, so that the first movement in starting will be the forward thrust, which is the movement most favorable for application of the power.

I am aware that a pendulous lever with a toothed segment and a reciprocating clutchpinion are not new broadly as a foot-power driving-gear, and I do not claim'such devices broadly.

What I do claim as my invention is- 1. The combination of the pendulous treadle-carrying lever, bearing two reciprocating toothed segments, reversely-driving clutchpinions respectively engaging said toothed segments, a bevel-wheel connected with each pinion and geared with an intermediate bevelpinion on opposite sides of its axis, and a transmitting-Wheel geared with one of the bevel-Wheels.

2. The combination with the transmittingwheel, of the pinion, shaft and pulley geared with said transmitting-wheel, bushing wherein said shaft is mounted and being supported in the frame-piece and secured by the disk nut, flanged cover inclosing said pulley-driving pinion, and disk nut, the shaft bearing socketed pivot-stud on the back of said cover, and the pendulous foot-lever pivoted on said stud and geared with said transmitting-wheel. Signed at New York this 2d day of August,

OLIVER HOWARD GENTRY. WVitn'esses:

O. SEDGWIGK, J. M. HOWARD.

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