US698073A

US698073A - Clipper or shearing-tool.

Info

Publication number: US698073A
Application number: US7327701A
Authority: US
Inventors: John K Stewart
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-08-26
Filing date: 1901-08-26
Publication date: 1902-04-22
Anticipated expiration: 1919-04-22

Description

No. 698,073. l Patented Apr. 22, |902.

. y. .1. K. sT-EwART.

CLIPPEB 0R SHEARING TOUL.

(Application filed Aug. 26, 1901.) v

(No Model.)

77:02 72 esj-56,5

4NTTED STATES PATENT OFFICE.

JOHNK. STEWART, OF CHICAGO, ILLINOIS.

SPECIFICATION forming part of .Letters Patent No. 698,073, dated April 22, 1902.

Application filed August 26, 1901. Serial No. 73,277. (No model.)

To all whom, t may concern.:

Beit known that I, JOHN K. STEWART, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Clippers or shearing-Tools, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

This invention relates to clippers or shearing-tools; and it consists of features of construction which are set out in the claims.

In the drawings, Figure 1 is a longitudinal vertical section of my improved shearingtool. Fig. 2 is a top plan of the same with the cap-plate removed. Fig. 3 is a transverse section at the line 3.3 on Fig. l.

A is the body on which the operating parts are journaled and mounted and which carries with it at the forward end a comb or fixed cutter.

` B is the operating-shaft, journaled in the handle or bodyC and actuating the main lever D by the customary crank-pin and roll operating in the vertical channel D' at the rear end of the lever D. The lever D is fulcrumed on a post A3, rigid with the body A. Itisbifurcated forward of its bearing on the pivot-post, and the arms D4 D4 of such bifurcation are connecte'dat a distance back of their ends at the upper side by the cross-bar D2. The inner Asurfaces of the arms D4 D4,

facing each other,` are accurately jlinished in parallel vertical planes, and fitting closely betweenthem is a bushing lsleeve or collar L, havingits opposite vertical sides correspondingly inished to seat accurately on the facing inner surfaces of the armsD4 D4, so that said sleeve has'capacityfor movement with respect to thearmsonly in the directionof said fore-and-aft Vertical planes without capacity for lateral movement with respectto said arms. In the cylindrical longitudinal aperture of the sleeve there is accurately fitted and journaled the cylindrical stem E2 of a secondary lever E, ysaid lever being spread or forked at its forward end, terminating in the bearing-fingers E' E' offthe'vibratingcutter G, toward the opposite end of the latter, and having just behind said bearing-fingers the pins e c, which take into the oscillating cutter, thereby constituting said secondary lever the medium by which lever D communicates movement-to the oscillating cutter.

H is a supplemental lever-finger which is tends forward of the pivot underor in a sloty or channel E5 of the secondary lever E, protruding between the fingers E E of the latthe operating pivoted at h to the secondary lever E and ex- Y' ter and bearing upon the middle tooth G2 of the cutter G. l

H is a pivot-bolt which is set through one "of the fork-arms D4 and screwed into the is inserted, whereby it is adapted to crowd said arms together slightly, takingadvantage of the spring. of the metal tov insure a perfectly close fit of the bushing-sleeve between said arms, while' at the same time permitting saidsleeve sufficient freedom for the movement which it may require in the plane of the parallel faces of the' sleeve and said arma.

This pivot-pin taking through the sleeve, which .is slotted vertically at Z Z for that purpose, in. likemanner takes through the'stenn E2 of the secondary lever E, the aperture e2 being also slightly elongated vertically to permit slight'vertical (movement of the lever with respect to thepivot-.bolt This bolt is the pivot-bearing of the supplemental le# ver-finger H, lwhich is thus directly pivoted to the operating-lever D; but the pivot-aperture in said supplemental lever-fingerH is slightly larger than the pivot to permit slight oscillation of said `finger, and thereby of the secondary lever E, in the channel of which said finger is confined, and the said finger and said secondary lever are thus'made capable of pivotal action in vertical plane and slight oscillatory action about the stem of the said secondary lever. It will be seen that the secondary lever by its close fit in the bushingsleeve and by the close it of that sleeve between the fork-arms D4 D4 of the operatinglever D is insured full rangeof movement about the fulcrum-post A3 andis thereby adapted to give full cutting movement to the vibrating cutter G, while at the same time, by reason of the construction described per-4 mitting a rocking or oscillation of the secondary lever about the axis of its stem, the le# verE is adapted to accommodate itself perfectly to the slightest inaccuracy which may existin the construction, which might cause the vibrating cutter to bind or press more forcibly upon the fixed comb or cutter at one part of its path than at another, and this is the purpose of the construction described, considered generally, while specifically the purpose of the bushing-sleeve is to prevent lost motion or wear which might occur between the secondary lever and the main operating-lever in respect to the cutting movement', the broad surfaces of the bushingsleeve where it bears upon the inner surfaces of the fork-arms D4 of the operating lever and the provision of the pivot-bolt H', adapted to clamp said arms on the sleeve, being a complete safeguard against any lost motion at this point, while the extended surface of the cylindrical stem E2, bearing within the bushing, and the very slight range of oscillation which occurs at these bearing-surfaces insure frecdom from lost motion at this point.

A' is a cap which constitutes the upper part of the case A and closes it above.

J is a steel plate which closes an aperture in the cap-plate above the cross-bar D?, said plate being held to the cap by boltsjj, which also hold the cap to the main body or case A. The under surface of the plate J is parallel to the plane of contact of the cutters, and the upper face of the cross-bar D2 is designed to be also inthat plane, and its face bears on the under surface of the plate J as the operating-lever vibrates. In order to lubricate the surfaces of the plate J and cross bar D2, which are in rubbing contact during the action of the machine, the plate J has an aperture J1", in which is inserted a thimble or cup J, filled with fibrous absorbent material M, as felt, adapted to absorb and retain and particularly to strain the oil for lubricating said surfaces. This thimble is represented as spun with retaining-flanges at the upper and lower edges and a shoulder M', stopping it on the plate J, so that the lower end shall not touch the bar D2, the felt M being protruded sufficiently to carry the oil to the surface of said bar.

F is the screw for adjusting the pressure of the oscillating cutter upon the fixed comb or cutter. To accommodate it, the operatinglever D has a vertically-extending boss D5, hollow from top to bottom and interiorly threaded; Into the threaded aperture of this boss, at the forward side, an opening D50 leads from the space between the fork-arms D4 D4, and the rear end of the secondary lever E protrudes through this opening into the vertical cavity provided for the adjusting-screw F, and said screw at an intermediate portion of its length has a circumferentially-extending or annular groove F', (interrupting the thread at that part,) into which the rear end of said secondary lever E takes, so that as the screw is operated up and down by rotation the said rear end of the secondary lever is similarly carried up and down and the forward end is pressed more or less forcibly upon the eutter G.

I claim- 1. In a clipperor shearing-tool, in combination with the vibrating cutter a main operating-lever and means for actuating it; a sleeve or collar pivoted to said main operating-lever, and a secondary lever journaled in said sleeve or collar and adapted to oscillate therein about the longitudinal aXis thereof, and engaging and vibrating the cutter.

2. In aclipper or shearing-tool, in combination with the vibrating cutter a main operating-lever and means for actuating it; a secondary lever actuated by said main operating-lever, having pivotal connections therewith and a limited range of oscillation about a longitudinal axis, and of vertical movement with respect to said main operating-lever the latter having a recess at its forward part with parallel vertical sides, and a bushing-sleeve having corresponding parallel vertical sides fitting closely between the vertical sides of said recess, said secondary lever being journaled and adapted to oscillate about the longitudinal axis of its stem in said bushingsleeve.

3. In a clipper or shearing-tool, in combination with a vibrating cutter, the main operating-lever and means for actuating it; a secondary lever having pivotal connections with said main lever, with limited freedom of oscillation about a longitudinal axis, and of vertical movement in respect to said main lever, said secondary lever bearing on the vibrating cutter and constituting the medium y by which the main lever actuates said cutter;

a bushing-sleeve carried by the main operating-lever and having vertical movement with respect thereto, and restrained with respect to transverse movement; the secondary lever having a cylindrical stem journaled in the bushing-sleeve and adapted to oscillate therein; and a screw operating between said main lever and said secondary lever to adjust the secondary lever in vertical plane about its pivotal connection to the main operatinglever.

4. In a clipper or shearing-tool, in combination with the case or body having at the forward end the comb or fixed cutter, the vibrating cutter, the main operating-lever and means for actuating it; a secondary lever which at its forward end bears upon the vibrating cutter toward the opposite end of the latter; a supplemental finger pivoted at its rear end to said secondary lever, and at its forward end bearing upon the vibrating cutter intermediate the ends of the latter, and being forward of its pivotal connection to the secondary lever pivoted also to the main op erating-lever, and having at its last-mentioned pivot limited freedom of oscillation about a longitudinal axis, and a bushing-sleeve on the stem of said secondary lever in which the latter is adapted to oscillate, Said bushing-sleeve being mounted in the main operating-lever IOO IIO

with capacity for vertical movement but restrained against lateral movement with respect to said oscillating lever; and an adjusting-screw operating between the rear portion of said secondary lever and the operating-lever, to press the .forward end` of the secondary lever on the vibrating cutter.

5. In a clipper or shearing-tool, in combination with a cutter-operating lever, having an upwardly-facing bearing-surface, a plate against which said surface is pressed, having an' aperture, and the oil holder and strainer, M, in said aperture having a flange at the upper end to retain the oil-straining material, and a shoulder, M', stopping it on the plate.

6. In a clipper or shearing-tool, in combination with the cutter the main operating-lever and means for actuating it; a secondary lever actuated by said main operating-lever, and having a cylindrical stem;` a bushingsleeve on such stem,rl0dged in the main operating-lever and having capacityfor vertical movement, but restrained against lateral movement in respect thereto; a pivotpin extending through said bushing sleeve and through said secondary lever and secured in the operating-lever, and connecting said three parts together; the aperture lfor said pin through the bushing-sleeve and through the secondary lever being vertically elongated to afford limited range of vertical movement and to -bear upon the cutter; said operating-lever havingva vertical threaded aperture-back ot' the pivot of the secondarylever theretoand an opening into said threaded aperture at the forward side, the rear endfot' thesecondary lever extendingthrough said opening; ascrew extending in said threaded aperture, and hav- `ing at an intermediate point of its threaded extent a circumferential or annular groove which correspondsrin position, Vwhen the v screw is in operative relation `with the `other parts, with the openingrin the forward side of said threaded aperture, the rear endof the Y secondary lever taking throughsaid opening and engaging in -the annular groove of they Screw; whereby the latter serves to elevate' the rear end ofthe lever to causeitto press at the forward end onthe cutter.l

In testimony whereof I have hereuntoset my hand,at Chicago, Illinois,this 14th-'day of August, 1901. 1

vJOHN K. STEWART.

In presence of-- GHAs. S. BURTON, ADNA H. BOWEN, Jr.