US392541A

US392541A - Geoege e

Info

Publication number: US392541A
Authority: US
Publication date: 1888-11-06
Anticipated expiration: 1905-11-06

Description

Patented Nov. 6, 1888.

UNTTne STATES PATTNT @rrrcre.

GEORGE OULLINGWORTH, OF NEWV YORK, N. Y.

ROTATION DEVICE FOR ROCK=DRILLS.

SPECIFICATION forming part of Letters Patent No. 392,541, dated November 6, 1888.

Application filed February 3. 1887. Serial No. 226,372.

.To aZZ whom it may concern.-

Be it known that I, GEORGE E. CULLING- WORTH, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Rotation Devices for Rock-Drills, of which the following is a specification.

I will describe in detail a rotation device for a rock-drill, and then point out the novel features in claims.

In the accompanying drawings, Figure 1 is a longitudinal section of such portions of a rock-drill as are necessary to illustrate myinvention. Fig. 2 is an interior View of the back head, including a transverse section of the spiral bar and a view of the ratchet-head of the bar and two pawls acting thereon, the view being taken upon about the plane of the dotted line 00 m, Fig. 1. Fig. 3 is a longitudinal section of the back head and adjacent end portion of the cylinder upon about the plane indicated by the dotted line 3 y, Fig. 2; and Fig. 4 represents the rotation washer or bearer and the pawl-washers which look it against turning, including, also, a transverse section of the pawl-pivots.

Similar letters of reference designate corre sponding parts in the several figures.

A designates the cylinder, in which is fitted the piston B, and in this piston is fixed an ordinary nut, 13, which engages with the spiral bar 0 and produces the rotation of the piston. The spiral bar 0 has upon its rear end a'ratchethead, 0, which may be secured in place by a nut, c, and the back head, A, of the cylinder A is recessed, so as to receive within it the ratchet-head G and the nut 0. These parts are held in place by the rotation washer or bearer D, which is of circular form and fitted to a rabbct, cl, formed between the cylinderA and head A, said rabbet being in this exan1- ple of the invention formed in the head. The spiral bar 0 passes through the circular washer or bearer D, and in a co .crbore of the cylinder, inward. of Asher or bearer, may be arranged a C'usfllOll of india-rubber, d, and a pro L.on-plate, d, against which the piston 1- comes directly. The function of this spring (N0 model.)

is to deaden the impact of the piston in its upward stroke.

The back head, A, is recessed, as shown at b, so as to accommodate two pawls, e, which are supported by pins or pivots e, passing through the back head, A, and, as best shown in Fig. 8, entering the end of the cylinder A. The pivots or bolts e may have immediately inward of their heads screw-threads which engage the back head, A, and for the remainder of their length may be plain, passing through the pawls e and entering the holes 6' in the end of the cylinder.

WVashers 6 which are inward of the pawls e, and through which the bolts or pivots e pass, serve to fill up the space in the head, which is concentric with the pawl-pivot, and which is equal in thickness or depth to the thickness of the edge of the rotation washer or bearer D. These washers not only fill this space, but the pins or bolts 6 are arranged near enough to the edge of the circular washer or bearer D, so that the washers 6 which are thus fixed relatively to the cylinder, enter the recesses e", formed in the edge of the rotation washer or bearer D, as shown in Fig. 4, and thus prevent said washer or bearer from rotating. The washers c constitute locking devices which enter the recesses c and serve the desired purpose.

In the back head, A, at points opposite the pawls e, are transverse bores or cylindric sockets f, in which are arranged springs f. In each bore or socket f is a cup-shaped shoe, f in which one end of the spring f bears, and the opposite end of the spring bears against a plug, f closing the outer end of the bore f, and it may be cup-shaped in its interior, as shown in Fig. l, to receive the spring.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, with the cylinder and its head and the spiral bar and its ratchethead, of the circular washer or bearer D, arranged between the cylinder end and the back head, and through which the bar passes, and which has a recess, 6, in its periphery, and a key or locking device fixed relatively to the cylinder, engaging said recess and preventing through which the screw passes, and which the rotation of the washer or bearer, substanengages said recess to prevent rotation of the IO tially as specified. washer or bearer D, substantially as herein 2. The combination, with the cylinder and described. 5 its head and the spiral bar and its ratehet- G. R. GULLINGXVORTH.

head, of the circular washer or bearer D, Witnesses: having a recess, 6*, in its periphery, a pawl, FREDK. HAYNEs,

e and its ivot-screw e and a washer c, HENRYJ. lllcBnnm.