US857529A - Adjustable drill-support. - Google Patents

Description

PATENTED JUNE 18, 1907.

A. MGHRBACHER. ADJUSTABLE DRILLSUPPORT.

APPLIUATION FILED AUG. 2B, 1906.

An ULPH MUHRBAB /A/VE/vroH HER ATTORNEYS between two opposite Walls.

UNITED STATES PATENT4 OFFICE.-

ADOLPH MOHRBAOHER, OF CRIPPLE CREEK, COLORADO.

ADJUSTABLE DRILL-SUPPORT.

.Application filed August 28,1906.

To a/ZZ whom, t may concern: v-inBe it known that I, ADOLPH MOHRBAGHER, a citizen of the United States, and a resident of Cripple Creek, in the county of .Teller and State of Colorado, have made certain new and useful Improvements in Adjustable Drill- Supports, of which the following is a specification.

My invention is an improvement in drills and relates particularly to the means for sup porting what are commonly known as hand machine air drills; and 'the invention consists in certain novel constructions and combinations of parts as will be hereinafter described and claimed.

In the drawing, Figure l is a side elevation of a support embodying my invention held Fig. 2 is a vertical longitudinal section ofthe support in connection with anair drill, the latter eX- tending between the support and the upper wall. Fig. 3 is a cross section on about line 3 3 of Fig. 2. Fig. 4 is a crossl section on about line 4-4 of Fig. 2, and Fig. 5 shows a different form of point from that illustrated in Fig. 2.

My invention seeks to provide in connection with an adjustable or eXtensible cross bar, a support for the stopping bar of an air drill, such for instance as the Iler, Ingersoll Jap, Murphy, Hartsock, Shaw Eclipse, and similar well known machines that are made with self-air feeding stoping bars, the machines being operated by compressed air as is well understood by those skilled in the art.

In the drawing I represent at A an Iler air machine, in which the air pipe A leads to a cylinder A2 and the stoping bar A3 works in the cylinder A2 and is formed at its lower end to fit in any desired one of a series of sockets B formed in the adjustable sleeve B presently described. f

The extension cross bar comprises the outer or tubular section C and the inner or bolt section D, the latter being threaded in the section C and pointed at one end D and r'ovided near such end with openings D2 forming sockets for a jack bar whereby the threaded section D may be turned to adjust the length of the sectional cross bar. At its .outer end, the tube O is provided witha threaded bearing for the screw stem E of the point E, such threaded bearing being preferably provided in a separate sleeve E2 and iitted and secured Within the end of the tube O as shown in Fig. 2. The point E may be as Specification of Letters Patent.

Patented June 18, 1907.

Serial No. 332,346.

shown in Fig. 2, orit may be preferred in some instances to .use a different form of point such as shown at e in Fig. 5. At its end opposite the sleeve E2, the tube O is provided With a threaded bearing for the bolt D, such threaded bearing being formed in a separatev sleeve F suitably threaded and iitted and secured within the end of the tube C as shown in Fig. 2. l

The bolt D is threaded to iit thesleeve F, and is pro vided at its inner end with a slide G iitting within the tube C and operating to steady the movement of the inner end of the boltD Within the tube O, as will be understood from Fig. 2, and also to form a stop, which, by contact with sleeve F, prevents the bolt D from being drawn out of tube C. This slide G is preferably in the form of a collar screwed on a screw stem g at the inner end of the bolt D so it can be applied after the bolt has been screwed through its sleeve F. Thus in applying the parts, it will be u nderstood that the sleeve F may be fitted within the tube O at one end, the bolt D be screwed into said sleeve F and project at its inner end within the tube C, the slide G be then applied, and the sleeve E2 finally applied to receive the point E or e as will be understood from Fig. 2.

' The sleeve B is fitted over the tube of the extension bar, being provided at one end with an inwardly projecting flange B2 to fit and slide along the bolt D and thus steady and brace such end of the sleeve B as best shown in Fig. 2. This sleeve it will be noticed is movable along the extension bar in a longitudinal direction, and also may be turned on said bar, and means are provided for securing the sleeve in any desired longitudinal or rotary adjustment upon the cross bar. This may be simply a clamping screw II as shown, or it may be any other suitable form of clamp. The screw II is preferred because of its simplicity and the ease with which it may be operated to secure and release the sleeve.

IOO

By my invention it will be noticed the air v IIO receiving the lower end of the self-feeding n stoping bar as will be understood from Fig.

2. .The sockets, it will be noticed, form seats for the stoping bar which may be simply dropped at its lower end into any desired socket and the air be supplied to operate the drill and to also secure the self-feeding by the action of the air in the cylinder A2 upon the stoping bar as is well known by those skilled in the art. It will be noticed therefore that my invention provides a support for air machine drills, operated by self-feed ing stoping bars, and that the drill A shown is one form of many such drills now in use.

The support may be made. in different sizes to suit different demands, and` when operated will result in the saving of much time and labor by permitting the convenient setting up of the machine without requiringT the cutting of hitches, and dispensing` with the use of wedges, etc., as are commonly used providing supports for drills of the character described. It will be understood. that in practice, the extension cross bars may be manufactured and sold to those using such drills.

It will be understood that the sleeve or jacket B is an important feature of my invention, as it provides in connection with a cross bar an adjustable support providing a seat for the stoping bar as before described.

l claim:

l. An extension cross bar consisting of a tubular section, sleevesthreaded internally and fitted and held within the opposite ends ofthe said tube, a point having a screw stem threaded into one of said sleeves, and a bolt section threaded into the other sleeve and having at its inner end a screw stem and a collar thereon and forming a slide fitting within the tubular section, said bolt having a pointat its outer end, and an adjustable sleeve or jacket lit-ting on and movable longitudinally and rotarily upon the tube of the cross bar, and having` at one end an inwardly projecting flange tting and slidable along the threaded bolt, the said sleeve or jacket being provided with a socket or sockets to receive the end of a stoping bar, and means for securing the said sleeve or jacket in any desired adjustment, substantially as set forth.

2. A cross bar having a tubular section and a bolt or threaded section screwing into the tubular section, and a sleevel or jacket adjustable upon the tubular section and projecting at one end over the bolt section and having at said end an inwardly projecting flange to slide upon the bolt section, and steady such end of the sleeve or jacket, the latter having a seat or seats lor a stoping bar, substantially as set forth.

ADOLPH MOHRBACHER.

Witnesses z ERNEST L. HUMPnREYs, MARvEN O. BERRY.

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