US405469A

US405469A - George w

Info

Publication number: US405469A
Authority: US
Publication date: 1889-06-18
Anticipated expiration: 1906-06-18

Description

(No Model.)

G. W. GLENN.

RATGHET STOCK.

No. 405,469. Patented June 18, 1889.

1m! i e\ i I d" I F 71,

, min

INVENTORZ BY 0-0/3 $.MW

ATTORNEY.

UNITED STATES PATENT OFFICE.

GEORGE GLENN, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE-HALF TO XVESLEY O. THORPE, JR, OF SAME PLAOE.

RATCH ET-STOC K.

SPECIFICATION forming part of Letters Patent No. 405,469, dated June 18, 1889.

Application filed February 1, 1889. Serial No. 298,378. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE IV. GLENN, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Ratchet-Stocks, of which the following is a specification.

My invention relates to an improvement in ratchet-stocks for use with hand-drills and similar purposes.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the device. Fig. 2 is a top and part sectional view of the same.

The stock has a head A and a handle I) of any desired length or shape. It has a slot 0, which forms two arms or bifurcations d. The ratchet-wheel e occupies the slot, and is mounted on the revoluble shaft or tool-holder F, whose bearings are in the said two arms (I.

The stock is provided with two pawls g 7L, which occupy and are pivoted in the slot- 0. Each pawl has a spring g and 7t bearing on it, and thereby its free end is kept in contact with the ratchet-wheel e. A feature of the two pawls and the spring construction in connection with them consists of one pawl g having an arm '5 attached to its pivot-hub and projecting therefrom in an opposite direction from the free end, which engages with the ratchet-wheel, while the other pawl h is without such an arm. The pawl g, which has the arm, is kept in contact with the ratchet-wheel c by a spring g, attached to the one side of the stock, and which bears on the arm 2' of the pawl. The other pawl h is kept in contact with the ratchet-wheel by a spring 77. attached to the opposite side of the stock and bearing directly on its free end.

A feature of the invention consists of the particular manner in which the two pawls are in contact with the ratchet-wheel e. The device is something more than a mere duplication of pawls. It will be noticed that while both are in contact with said wheel only one of them, h, is engaged with a tooth of the ratchet-wheel, the point of the other pawl g resting on the back of a tooth at about its center. By this arrangement, when the handle b of the stock is moved forward, the two pawls click alternately over the teeth on the ratchet-wheel, and said handle will have to move but half the distance that would otherwise be necessary in order to have a pawl engage. Thus without reducing the size of the teeth on the ratchet'wheel a pawl may advance to another tooth by a movement of the handle of one-half the distance only that teeth of the same size'would usually require.

A drill J or any other kind of a tool may be used in the holder F.

Having described my invention, I claim 1. In a ratchet-stock tool-holder, the combination, with the bifurcated head A and the shaft with ratchetwheel c mounted in said head, of the pawls g 72 with springs g h, the pawl g being centrally pivoted to form an arm 2', substantially as and for the purpose set forth.

2. A ratchet-stock tool-holder consisting of the bifurcated head A, the shaft with ratchetwheel 6 mounted in said head, and the pawls g h, with springs g h, the pawl g being pivoted at its center to form an arm 2', so as to have a movement at both ends of said pawl, substantially as specified.

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

GEORGE XV. lrLENN.

lVitnesses:

JOHN E. MORRIS, J NO. T. MAnnoX.