US569346A

US569346A - Crank-handle

Info

Publication number: US569346A
Authority: US
Publication date: 1896-10-13
Anticipated expiration: 1913-10-13

Description

(No Model.)

J. D. MQFARLAND, Jr.

CRANK HANDLE.

Patented Oct. 13,, 1896.

m: uoams PEYEFIS co. marc-urna, WASHINGTON a c UNITED STATES PATENT OEEICE.

, JAMES DRAYTEN MOFARLAND, JR, OF PROSPER, OREGON.

CRANK-HANDLE.

SPECIFICATION folming part of Letters Patent No. 569,346, dated October 13, 1896.

Application filed March 2, 1896- ]0 all whom it may concern.-

Be it known that 1, JAMEs DRAYTEN Mc- FARLAND, J r., a citizen of the United States, residing at Prosper, in the county of Coos and State of Oregon, have invented a new and useful Crank-Handle, of which the following is a specification.

My invention relates to improvements in crank-handles that are used to drive loggingjacks or other devices by hand-power; and the objects of my improvement are, first, to reduce the liability to injury of the operator by being struck by the reverse movement of the handle should the holding-ratchet break, or from other causes; second, to provide a handle that will enable a person to get the full benefit of all the leverage in the loggingjack, and, third, to afford facilities for oper atin g the logging-jack in close quarters where a complete revolution of the handle cannot be made. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a longitudinal section of the entire handle; Fig. 2, a perspective view of the cross-head and part of the body of the handle, showing how the cross-head appears with the ratchet removed; Fig. 3, a detailed view in perspective of the ratchet. The section-view is taken on line 1 2, Figs. 2 and 3.

Similarletters refer to similarparts throughout the several views.

The cross-head A, the tube E, and the hand hold I) constitute what may be termed the fixed parts of the handle. The cross-head is shrunk on one end of the tube E. At the oth er end the handhold D is shrunk on, forming a right angle to the tube and parallel with the hole G in the cross-head. In the hole G is placed the ratchet B, which may be retained in position by the flanges g g, being shrunk onto each end of the ratchet, or it may be threaded for the reception of the flanges.

Through the tube E extends the pawl or dog rod O. This rod is bent at a to conform to the shape of the handhold. It is again bent at b, so as to pass into a hole c in the handhold. This hole is of two sizes, the smaller opening being on the side where the rod enters. The rod is threaded at cl for the reception ofa nut i. As this nut is in the larger part of hole 6 it will retain the rod in Serial No. 581,596. (No model.)

its place in the handle. The rod is concaved from a to b on the inner side so as to fit the convex surface of the handhold when the two are pressed together, thereby forming an even surface for the grasp of the hand.

In the ratchet B are a series of holes a c c for the reception of end h of the pawl-rod C. These holes are countersunk or flaring at the end the pawl-rod enters. They extend through the shell of the ratchet into the square hole F, so that any foreign substance that may clog them can be easily removed. The square hole F extends through the ratchet from end to end and is for the reception of the shank or stem of the logging-jack or other machine to which the handle may be applied.

The handle is operated by pressing the handhold and rod together, causing the end h to enter one of the holes in the ratchet, when the ratchet can be turned in either direction. (As all loggingjacks or other devices to which the handle is of any benefit are provided with holding ratchets and pawls I do not deem it necessary to showany part of them.) As the pressure is removed the spring f, which is secured at one end to the handhold, will force the rod out of contact with the ratchet. The load is then held by the holding-ratchet above mentioned, while a new hold is being secured with the handle. Should the holding-ratchet break or the screw slip, the handle-ratchet can turn freely in the cross-head while the handleremains motionless. Thishandlemay be made with the ratchet-holes in the shank or stem of the device to be driven. I prefer it as herein shown and described, as it will, I think, prove more serviceable. The handle may also be made with two parallel rods, one of which will form the body of the handle and be shrunk in the cross-head, the other to be the pawl or dog rod and to slide in a slot on the cross-head, the two to be bent to form a handhold and in all other respects to be as the style described. I prefer the handle as shown, as it is more compact.

Therefore, what I claim as my invention, and desire to secure by Letters Patent, is

1. A crank-handle consisting of a hollow shank, an eye in the end of said shank, a bushing with a square hole, and a series of holes around the circumference thereof, a locking-rod passing through the hollow of the ICO shank and adapted to enter the circumferenholding said rod out of engagement with said 7 tial holes in the bushing, and a spring for holes, or slots, all substantially as described, 10 normally holding said rod out of engagement for the purposes specified.

with said holes, all substantially as described.

, i J H 1 2. The combination ofacrank-handle,with DRMTE) MLPARLMD a locking-rod adapted to enter circumferen- Vitnesses: tial holes, or slots, on the stem of the device A. PERSHBAKER, to be operated, and a spring for normally AIMEE PERSHBAKER.