US1164327A - Breast-drill support. - Google Patents

Description

T. BERGMAN.

BREAST DRILL SUPPORT.

APPLICATION HLE'D APR. 2. 1915.

L1@%,3Q?. I Patented Dec. 14, 1915.

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T. BERGMAN.

BREAST DRILL SUPPORT.

APPLICATION FILED APR. 2. 1915.

Patented Dec. 14, 1915.

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Ill llllllH Zzijrfimesses: 157126717502 Ike/ado 7"@/ Bar" m/am/ I THEODORE BERGMAN, OF CHICAGO, ILLINOIS.

BREAST-DRILL SUPPORT.

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Specificationof Letters rat-em.

Patented nee. la, iaia.

Application filed April 2, 1915. Serial No. 18 827.

To all whom it may concern" v Be it known that I, Tnnooonn Bnuoiran, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Breast- Drill Supports, of which the following is a specification.

My invention relates to mechanism through the medium of which a simple breast-drill may be employed as an upright standing drill, in order to adapt the drill for'use in connection with many classes of work where the ordinary breast-drill cannot suitably be used.

T he object of my invention is the production of a device of the character mentioned which will be of simple construction and eilicient in use.

Other objects will appear hereinafter.

The invention consists in the combinations and ar' anirements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings fo m ng a part of this specification, and in which,

F i gure 1 is a front elevation of a breast drill supporting mechanism embodying my invention, a breast-drill being shown in connection therewith, Fig. 2, asectional detail top plan view of the upper cross piece of the device illustrating the construction of the guide attached thereto, Fig. 3, a detail sec tion taken on line a--00 of Fig. 1, Fig. 1, a partial sectional side elevation of the construction shown in Fig. 1, and Fig. 5, a plan view of the base plate of the device with the guide bars shown in section.

T he preferred form of construction as illustrated in the drawings comprises a plate 1 provided with suitable openings for the reception of screws 2 whereby said plate may be rigidly fastened to a bench or table top or other suitable supporting structure. Rigidly secured in and arising from the base plate 1 are spaced parallel guide bars 3 which are rigidly connected at their upper ends by a cross piece l.

Slidably mounted upon the guide bars 3 is a yoke 5 which is moved or fed vertically by means of a screw 6 which is threaded in the cross piece 4. The lower end of said screw 6 is in swiveled connection with the yoke 5, the upper end of said screw being provided with a hand wheel whereby said screw may be manually rotated. Formed in the front side of the yoke 5 midway the ends thereof is a circular socket 8 and formed in the rearward side of said yoke coaxial with the socket 8 is a second socket 9, the bottoms of said sockets S and 9 being connected by a smaller opening or a pas sage 10.

Arranged upon the upper side of the cross piece l midway the ends thereof is a guide member 11 substantialy U-shaped in form. One end of said guide member is pivotally secured by means of a screw 12 to an enlargement 13 formed upon the member 4 to accommodate said guide member. At the opposite end of said guide member is provided a depending lip 14: adapted for engagement against the adjacent edge of the portion 13 inorder to lock the guide member in operative or closed position. With this arrangement in order to unlock said guide member so as to permit of swinging thereof to a position in which entrance may be gained to the entrance slot 15, it is first necessary to sufficiently loosen the screw 12 to permit of the lip 14 being moved vertically from engagement with the post 18, "When this has been done, the guide member may be swung upon the sc ew 12 as a pivot to the position shown in Fig. 2.

The breast-drill which is used in coniunction with the supporting device comprises a drill stock or frame 16, an upwardly extending bar 17 for the support of the breast plate 18. a downwardly extending chuck 19 for the drill 20. meshing bevel gears 21 for driving the drill spindle and a handle 22 for manually rotating the gears 21. At the rearward side of the frame 16 is provided a stud 23 to which is fastened a handle 24, said handle having a threaded stem 25 at its inner end which engages with a threaded recess 26 formed in the stud 23.

In using the breast-drill in connection with the device the handle 24 is removed. This having been done the stud 23 is inserted in the socket 8 of the yoke 5, whereupon the inner end' of handle 24 is inserted into the socket 9, the stem 25 being passed through the opening 10 and reengaged with the recess 26. Thus the handle 24.- will serve as a means of rigidly locking the frame of the breast-drill to the yoke 5. At the same time the bar 17 of the breast-drill is engaged with the guide member 11 which will serve to securely hold the same in vertical posi with a slot 27 in order to adapt the device to accommodate a breast-drill having a bar 17 of ribbed formation as Will be readily understood.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification Without departing from the spirit of the invention as defined by the claims. I, therefore. do not wishto be limited to the precise details of construction set forth, but desire to avail myself of. such variations and modifications as come Within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1; The combination with a breast-drill. of a base plate; a pair of spaced parallel guide bars rigidly secured to and arising from said plate; a cross piece rigidlyconnecting the upper ends of said guide bars; a yoke slidably mounted on said guide bars; means for fastening the breast-drill to said yoke; a substantialy U-shaped guide member for the upper end portion of the breast-drill pivotally mounted on said cross piece; a depending lug on the free end of said guide member for engagement with said cross piece to lock said free end of said guide member in operative position; and means for moving said yoke on said guide bars; substantially as described.

2. The combination with a breast-drill, of a base plate; a pair of spaced parallel guide bars rigidly secured to and arising from said plate; a cross piece rigidly connecting the upper ends of said guide bars; a yoke slidably mounted on said guide bars; means for fastening the breast-drill to said yoke; a substantially U-shapcd guide member for the upper end portion of the breast-drill mounted on said cross piece; a screw for pivotally securing one end of said guide member to said cross piece; a stop for locking the other end of said guide member in operative position; and means for moving said yoke on said guide bars, substantially as described. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THEODORE BERGMAN. WVitnesses:

ARTHUR A. OLsov, HELEN F. LILLIS.

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

- Washington, D. G.

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