US1053474A - Gaging-dies for rock-drills. - Google Patents

Description

0. BROWN. GAGING DIES FOR ROCK DRILLS. APPLICATION FILED AUG. 2, 1909.

1,053,474. Patented Feb. 18, 1913.

2 SHEETS-SHEET 1.

WITNESSES- w INVENTOR.

A TTORNE Y.

COLUMBIA PLANOuiiAPI-l 60.,WA5MINGTON. 11.0.

Patented Feb. 18, 1913.

2 SHEETSSHEET 2. 2725-2 5.

0. BROWN.

GAGING DIES FOR ROCK DRILLS.

APPLICATION FILED AUG. 2, 1909.

' INVENTOR.

CA/Pz, fire/1014 ATTORNEY.

WITNESSES UNITED STATES PATENT OFFICE.

CARL BROWN, OF DENVER, COLORADO, ASSIGNOR TO THE CHAMPION EORGING MACHINE COMPANY, OF DENVER, COLORADO, A CORPORATION OF COLORADO.

To all whom it may concern:

Be it known that I, CARL BROWN, a citizen of the United States, residing in the city and county of Denver and the State of Colorado, have invented new anduseful Improvements in Gaging-Dies for Rock-Drills, of which the following, together with the accompanying drawings, constitute a full, clear, and exact specification.

This invention relates to dies for gaging the cruciform drill bits used in rock drilling, to uniform sizes. The said dies are intended to be furnished principally with the machine for making and sharpening rock drills and for general forging, upon which I have filed an application for U. S. Patent Serial No. 510,950 bearing even date herewit The object of the present invention is to provide a tool for gaging the thickness of the wings of rock drills and the amount of spread thereof, to such uniform dimensions as may be desired, and to accomplish this more quickly and efficiently than is done at present.

A further object is to eliminate skilled hand labor in this step of drill making.

While the primary purpose is to use this invention in connection with the machine referred to, yet these dies may be mounted in an individual framework and used separately in cases where this may seem desirable.

The present drawings show these dies as forming a part of the machine above mentioned but any skilled designer of machinery can readily see howto construct a simple individual framework containing the necessary elements for a separate machine.

In the accompanying drawings, Figure 1 is a front elevation of the dies in working position. Fig. 2 is a section taken on the lines 22, (Fig. 1) and Fig. 3 is an elevation taken from the lines 33, (Fig. 2) and in the direction indicated by the arrows.

The steel of which the drill is being made comes to these dies after having been operated upon by the opening dies, as ex-' plained in the application for U. S. patent already named.

Referring to the drawings, (3*) and (3 are parts of the tool wheel disks of my machine, the sleeves (3) and (3) extend- Specification of Letters Patent.

Application filed August 2, 1909.

Patented Feb.'18,1913. Serial No. 510,949.

ing outward respectively from (3 and (3 The block (15) forms the relatively stationary'part of the dies and (15 is the relatively movable part. (15 is secured in the sleeve (3) by pins (8 In constructing an individual machine, the parts (8 and (3?) would form a portion of the framework of the machine and these two parts would, of course, be rigidly connected to each other so as to allow the proper working of the dies. The movable part (15**) of the dies is held normally in the retracted position by the spring (6), which is in compression between the pins (3 and (15 A tapering stop (20), which is adjustable back and forth and having an L-shaped cross section, is slidably disposed in a corresponding groove formed in the front face of block (15 A straight bar (21), having a foot (21 the latter carrying the upright stop (21 is connected to (20) at the latters lowermost extremity by the bolt end (20") passing through an elongated eye (21) in the extremity of (21 Bar (21) slides over the face of (3 in the guides (23) and may be adjustably held in a number of different positions by the pin (24) attached to the spring handle (24) and engaging various corresponding holes (25), arranged on the face of (3 15*) and (15 have the tapering recesses 15), (15 respectively, cut in their 0pposing faces. The taper of these recesses corresponds to the taper desired on the sides on the drill wings. The drill wings are flattened out between the opposing faces of (15 and (15 and the thickness "of the drill Wings is determined by position of the adjustable-stop (20) which limits the distance of approach between (15) and (15 the latter at the same time gaging the amount of spread of the wings. By moving the bar (21) back and forth, the depth stop (21) is moved back and forth to the corresponding degree in the recess (15*), and the lateral stop (20) is moved in or out in the same proportion. It will be noticed that the same ratio will constantly exist between the depth to which the drill is admitted into the dies and the distance to which the stop (20) projects from the face of (15).

(28), (28), are arms extending from the engagement with the two extremities of pin (15 operating lever (27), is rigidly attachedto' the shaft (26) at any convenient point. The position of (27 at'the other extremity of its stroke is shown in dotted lines. The purpose of the device'just' explained is to retract (15) in case the spring pressure should, at an'y time, be ins'ufii'c'ient to accomplish this. V I

' In using the dies, the adjustable stops are first brought to the desired positions by means of .the spring-handle (24) and pin (24) engaging one of the corresponding holes (25). Thedrill steel is inserted into the dies from the front and the depth to which it is admitted is determined by the stop; (21 The hammer (5) is then allowed to strike (15 forcing it forward against the drill-steel until it is stopped by (20), thus flattening out two of the wings of the drill to the required gage, and at the same time, drawing down the amount of spread of the opposite wings to the corresponding gage. The drill steel is then withdrawn from the dies and turned through an angle of 90 degrees and again inserted into the dies" as before, when the hammer is allowed to strike (15 as before, thus gaging the thickness of the second pair of wings and gaging the amount of spread of the first pair. An anvilblock (9), back of the stationary die, is provided for taking. up the shock produced by the striking of the hammer (5).

wedge, suitably disposed in one of the said principal parts, the said slidable wedge be ing adapted to be drawn back and forth, and thereby to variably limit the distance of ap ,proach toward each other of the two said principal members substantially as, and for the purpose, described.

2. In gaging dies for rock drills, the combination with two principal forming members, of a suitably disposed slidable wedge in engagement with one of the said principal members; a spring handle slidably arranged on the same principal member; a slotted foot projecting from the said spring handle and engaging one extremity of the said slidable 'wedge; a depth gage mounted on the said projecting foot, and means-for rigidly holding the said spr ng handle in any one of several predetermlned different positions, as,

and for the purpose specified.

In testimony whereof, I have signed my name to this specification in the presence oftwo subscribing witnesses.

CARL BROWN.

Witnesses:

I. H. MALLINOKRODT, IDA B. HAWLEY.

Copies ofthis patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 0.

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