US798011A

US798011A - Horseshoe-calk sharpener.

Info

Publication number: US798011A
Application number: US22280104A
Authority: US
Inventors: Harry P Christie
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-08-31
Filing date: 1904-08-31
Publication date: 1905-08-22
Anticipated expiration: 1922-08-22

Description

PATENTED AUG. 22, 1905.

-H. P. CHRISTIE. noasssnor: GALK SHARPBNER.

APPLIOATION FILED AUG. 31, 1904.

c a u m a m n u w s a i m m a a n 1 W n w x a Aunsuw. s.

HARRY P. CHRISTIE, OF INDIANAPOLIS, INDIANA.

HORSESHOE-CALK SHARPENER.

Specification of Letters Patent.

Patented Aug. 22, 1905.

Application filed August 31,1904. Serial No. 222,801.

To II/N/ whom it may concern:

Be it known that I, HARRY P. CHRISTIE, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented new and useful Improvements in Horseshoe-Salk Sharpeners; and I do declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanyingd rawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to portable machines for sharpening" the toe and heel calks of horseshoes while the shoes are. attached to the hoofs of horses; and the invention has reference particularly to duplex grinding-machines for hand-power operation adapted to be used for the above-mentioned purpose.

The object of the invention is to provide an inexpensive portable machine suitable for grinding either side of a calk or both sides thereof at one operation, to the end that when the calks become slightly dull in winter seasons they may be quickly sharpened in the stable without subjecting the horse to the dangers of slippery streets or roads in going to a shop and also obviating the necessity of incurring the expense incident to removing, sharpening, and resetting shoes in the shop while the calks are sufliciently long to be resharpened and used.

With the above-mentioned and minor objects in view the invention consists in a machine comprising a pair of novel cooperating frames provided each with a grinding-roll and gearing for operating the rolls, the frames being connected together and adapted to be supported in one hand of the operator thereof.

Referring to the drawings, Figure 1 is a View in elevation of the machine; Fig. 2, a view of the machine in elevation and illustrating the manner in which it operates on the toe-calk of a horseshoe; Fig. 3, a fragmentary elevation viewed oppositely to Fig. 2; Fig. 4, a fragmentary vertical sectional view on the line 1 l in Fig. 1, and Fig. 5 is a sectional detail view of one of the grindingrolls and its supports.

Similar reference characters designate like I parts or features.

In construction a main frame A is provided that has a suitable handle (0, adapted to be held in one hand of an operator for supporting and guiding the machine, and the body portion of the frame is divided so as to provide two separated side parts I) and b, to which is connected a pivotal screw 0. adapted to be removed therefrom. An arm (Z is attached to the side part 1/ for supporting the drivewheel. A pair of separated arms eand a are attached to the lower ends of the side parts and have journal-bearings f and f at their extremities, all being parts of the main frame. A grinding roll or wheel B, having a shaft 9, is mounted in the bearings, and a pinion C is secured to the shaft outside of the frame. Slots 7a permitreadyinsertion of the roll-shaft into the bearings, as well as removal therefrom laterally, removable screwsz' normally holding the shaft in its bearings. At the junction of the arms 6 and e is an apertured ear 7', secured to the main frame.

A companion frame D is pivotally connected to the main frame by means of the pivotscrew 0 between the. side parts 6 and b, and it has an arm part 70 extending upwardly and opposite to the handle a, so that it may be manipulated by a finger or the thumb of the operators hand. The frame D is bifurcated at its lower end, so that a pair of separated arms Z and Z are provided, having each a journal-bearing m, in which a grinding-roll B is mounted, provided with a pinion G, attached to its shaft g. An ear j is attached to the frame D at the junction of the arms Z and Z thereof, and a coiled spring E is strained to the ears j and and normally draws the lower, parts of the frame one toward the other, so that the two rolls may be drawn together.

A toothed drive-wheel F is mounted rotatively on the end of the arm d and is held by a screw n or the like, the wheel meshing with the pinions C and C. The axis of the wheel F coincides with the axis of the pivot 0, that connects the frames A and D together, so that the pinions O and C may move along the periphery of the wheel F without becoming disengaged therefrom when the frames move relatively on their pivot. The wheel F is provided with a crank-handle p for operating the wheel by hand.

The grinding-rolls may be composed of any suitable material, such as emery molded onto a shaft, and in order to prevent excessive wear of the journal-bearing ends suitable washers q and q are placed between them and the ends of the rolls. The rolls may be cheaply produced and may be replaced by new ones when worn out. The pinions G or C are suitably secured to the roll-shafts, so

that they may be removed and attached to the shafts of new rolls.

In practical use the horses hoof should be held in a manner as when a shoe is being attached thereto between the limbs of the operator, the hoof being inverted, or nearly so. Then the machine should be held the handle a in one hand and the rolls separated by means of the arm 70, after which the rolls may be adjusted and allowed to close against opposite sides of a calk, as in Fig. 2. The drive-wheel may then be operated by means of its handle, so that the rolls will be rapidly rotated both in the same direction and will quickly sharpen the calk, grinding both sides thereof, and by guiding the machine properly one side may be ground more than the other or either one of the sides only of the call; may be ground.

It will be understood that while the grind-v ing-rolls both rotate in the same direction their adjacent surfaces pass each other in opposite directions, so that while one roll has a tendency to roll off of the calk the opposite roll will counteract this tendency by its tendency to roll in the opposite direction or toward the base of the ealk, and therefore no considerable eifort is required to hold the rolls in proper positions relatively to the callz, since the rubbing resistances are equalized.

The machine, as will be obvious, may be used in grinding various articles, such as coldhisels.

Having thus described the invention, what I claim as new is 1. A portable horseshoe-call: sharpener including a pair of connected frames, one frame of the pair provided with a supporting and controlling handle adapted to be held in a hand of an operator, and the other frame of the pair provided with a controlling-arm extending oppositely to the handle, and grinding-rolls mounted in the frames and geared together so as to rotate in the same direction.

2. A portable horseshoe-call; sharpener including a main frame provided with a supporting and controlling handle adapted to be held in a hand of an operator, a companion frame connected to the main frame and provided with a controlling-arm extending oppositely to the handle of the main frame so as to be engaged by a finger of the operators hand that holds the handle, a grinding-roll mounted in the main frame so as to be moved thereby to various positions, a grinding-roll mounted in the companion frame so as to be controlled by the arm thereof, and drivinggearing connected to the grinding-rolls.

3. A portable horseshoe-call; sharpener including a main frame and a connected companion frame provided with a pair of grinding-rolls geared together so that their adjacent peripheral faces may grind the calk in opposite directions and thereby equalize the grinding resistances, a supporting and controlling handle secured to the main frame and adapted to be held in a hand of an operator, an arm secured to the companion frame and extending oppositely to the handle, and a spring cooperating to draw the grinding-rolls each toward the other and also to force the arm away from the handle.

4. A portable horseshoe calk sharpener comprising a main frame provided with a handle for carrying and controlling the positions thereof, a grinding-roll mounted in the main frame, a companion frame pivoted to the main frame and provided with a controlling-arm extending oppositely to the handle of the main frame, a grinding-roll mounted in the companion frame, a lateral arm attached to the main frame, a pair of pinions one connected to one of the grinding-rolls and the other one connected to the other one of the grinding-rolls, a gear-wheel mounted on the lateral arm and engaging both pinions of the pair thereof, and a spring strained between the main frame and the companion frame.

5. A portable horseshoe calk sharpener comprising two grinding-rolls, a pair of connected frames supporting the rolls portably and providing means whereby either roll may be moved to or from the other roll, a handle attached to one of the frames adapted to be held in an operators hand, an arm attached to the other one of the frames and extending oppositely-to the handle cooperating therewith to move either roll to or from the calk, a spring opposing the movement of the arm toward the handle, a gear-wheel mounted on one of the frames, a pinion connected to one of the grinding-rolls and engaging the gearwheel, anda pinion connected to the other one of the grinding-rolls and also engaging the gear-wheel.

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

HARRY P. CHRISTIE.

Witnesses:

7M. H. PAYNE, E. T. SILvIUs.