US1053972A - Animal-shears. - Google Patents

Description

W. M. CAHILL.

ANIMAL SHEARS.

APPLIOATION FILED MAY 31, 1910.

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cO..\VASHlNu N D c WALTER M. CAHILL, OF WINONA, MINNESOTA.

ANIMAL-SHEARS.

Specification of Letters Patent,

Patented Feb.l 25, 1913.

Application filed May 31, 1910. Serial No. 564,077.

To all whomfe'zt may concern.'

Be it known that I, IALTER M. CAI-ULL, a citizen of the United States, residing at iVinona. in the county of 'Winona and State of 5 Minnesota, have invented a certain new and useful Improvement in Animal-Shears, of which the following is a specification.

My invention relates to improvements in animal shears and has for its object to pro- 0 vide an improved bearing for such shears.

It. is illustrated in the accompanying drawings, wherein- Figure l is a plan view of the device; Fig. Q, a ction along the line 2-2 of Fig. l; Fig. 3, a section along the line 3-3 of Fig. 2 on a large scale; Fig. 4, a longitudinal section through the rocker arm; Fig. 5, a detail of one of the spacing members.

Like letters refer to like parts throughoutv the several drawings.

The shell A is integral with and mounted upon the cylindrical handle A1 and carries the hub A2 which has the forwardly extending flange A37 the comb-plate A5 having the teeth AG. The cover B having` the collar B1. within which is screw threaded thereto the plug B2, is held upon the shell A by the screws B3 and the collar B'L which is screw threaded upon the handle A1 and has the conical surface B5 to engage the corresponding conical surface B6 upon the cover B and the shell A. The drive shaft C is carried in the bearing C1 within the handle A1 and has at its end the crank disk C2 carrying the 5 crank C3 upon which is rotatably mounted the ball Ct. The rocker arm G5 which is mounted upon the shaft G6 has at one end the cylindrical part C7 partially inclosing the ball C* and at the other has the downwardly extending ball bearing C2 and intermediate it and the shaft C6, the downwardly extending lug C9 perforated at C1". The yoke D having the bosses D1 and lingers D2 in contact respectively with the cutter plate D3 and outer cutting blades thereof D4 is perforated at D5 to permit the passage of the ball CS and has the rearwardly extendingcylindrical lug D6 within the perforation G10 in the lug C2 and has the downwardly extending hanger D7 which is perforated atI DS. The yoke E having the iingers E1 in contact with the inner cutting teeth of the plate D3 is provided with the socket bearing E2 to engage the ball GS and 5 has the rearwardly projecting part E3 resting upon the hanger D7 and carrying the pin E4 which engages the perforation D8 in the hanger DT. The shaft C is mounted at either end within bearings in the hub A2 and plug B2 respectively. The description of one will suffice for both. The cylindrical collar F perforated at F2 surrounds the end of the shaft and is mounted within the roller cage F2 within the body of the hub. The annular washers Ft F5 which surround the shaft CG have the concaved surfaces F to inclose the packing F7, the pressure upon which may be adjusted by means of the screw FS to provide an oil-tight dust-proof chamber or casing for the bearings. The perforated shaft CG which is hollow and has one end closed by the diaphragm G perforated at Gl contains the balls G2 separated by the spacing members G3 and provides an oil-tight dust-proof connection or passage between the bearing or chamber. The upper ball within the shaft projects above the end of it and is in contact with the web G4 which forms the bottom of the oil cup G5 and is perforated at GG. The cap GT is rigidly attached to the plug B2 and has the corrugations GS thereabout which are engaged by the projection G9 upon the spring G20 to hold the plug B2 in position.

It will be evident that while I have shown in my drawings an operative device, still numerous changes might be made in the size, shape and arrangement of parts without departing materially from the spirit of my invention.

The use and operation of my invention are as follows: I provide animal shears driven by a rotating shaft having a rocker arm to oscillate cutting knives in opposit-ion to stationary cutting knives, said rocker arm being mounted upon a rock shaft. I provide a bearing for said rock shaft comprising a cylindrical collar within which said rock shaft is-rotatably mounted, a. roller bearing about said collar and packing means about'said shaft to prevent the ingress of dust into the bearings. I provide a ball bearing in the end of the shaft in order that pressure may be brought through the shaft and the rocker arm upon the cutting teeth without undue friction. I provide a hollow rock shaft and an oil cup at one end of said shaft with passage through said shaftfrom the oil cup to each of the bearings. By this means, I am enabled to have a continuous oil chamber connecting the two bearings, preventing the admission of dust or dirt and preventing the loss of the lubricant.

I Claim :h

l. In an animal shears, a hollow rook shaft, a perforated plug in one end of said shaft, a plurality of balls Within Said shaft, one of said balls extending beyond the end of the shaft. Y

2. In an animal shears, a rocker arm, rook shaft upon which said arin is mounted, antiy friction bearings at either end of said shaft and an oil passage between said bearings7 anti-friction bearings upon eaeh end of Such bearings, said bearings comprising a Cylindrical collar and a roller Cage.

3. In an animal shears, a rocker arm, rook shaft upon which said arm is mounted, antifriction bearings at either end of said Shaft l and an oil passage between said bearings,l anti-friction bearings upon each end of Such l bearings, said bearings comprising a oylinl drioal collar and a roller Cage.

4l. In an animal shears, a rocker arm and roch shaft upon which said arm is mounted, anti-frietion bearings at either end of Said shaft comprising a cylinder having perl forated Walls and inelosing the shaft and a roller cage about said eylindeiga connection through said Shaft between said bearings and a ball. in one end of said Shaft in engagement with a flat surface at the end of one of Said bearings.

5. In an animal shears, a rocker arm and reel; shaft upon which said arm is mounted, anti-friction bearings at either end of said shaft comprising a cylinder having perforated Walls and inelosing' the shaft and a roller Cage about said cylinder, a Connection through said shaft between said bearings and a ball in one end of said shaft in engagement with a i'at surface at the end ot' one ot' said bearings, and a plurality of eon- Cave Washers about said shaft in engagement with said bearings.y means for holding said Washers in juXta-positions one to the other l to :torni a packingl containing cavity about the shaft.

WYALTER M. CAHILL. l'litnesses Finnois W. PARKER, Jr., PAUL J. GATHMANN.

Copies of this patent may be obtained foi` ve cents each, by addressing the Commissioner of Patents, Washington, B. C.

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