US2175546A

US2175546A - Noncircular hole driller attachment

Info

Publication number: US2175546A
Application number: US168461A
Authority: US
Inventors: Woods Bernard Albert
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-10-11
Filing date: 1937-10-11
Publication date: 1939-10-10
Anticipated expiration: 1956-10-10

Description

Oct. 10, 1939. B. WOODS 2,175,546

NONCIRCULAR HOLE DRILLER ATTACHMENT Filed Oct. 11, 1937 Aiiorneys Patented Oct. 10, 1939 UNITED STATES PATENT OFFICE NONCIRGULAR HOLE DRILLER ATTACHMENT 1 Claim.

This invention relates to an attachment for a drill for making non-circular holes, the general object of the invention being to provide a guide for the bit which causes the bit to make the hole of a non-circular shape desired and yieldable means for holding the guide against the work piece, so that it is not necessary to connect the guide with the work piece, with means for supporting the guide in a movable manner from the casing.

This invention also consists in certain other features of construction and in the combination and arrangement of several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure l is an elevation of a device for drilling a non-circular hole, with the invention applied thereto.

Figure 2 is a bottom plan view of Figure 1.

Figure 3 is a section on the line 3-3 of Figure 2.

In this drawing the numeral I indicates the casing of the drilling device which may be of the type shown in the patent to H. J. Watts No. 1,540,- 826 dated June 9, 1925 or any other suitable type, wherein the bit 9 has lateral movement to a certain extent when the device is operated by the shaft 5. In such devices guiding means are provided for the bit to cause the same to drill a hole of any desired non-circular shape in cross section and it is the object of my invention to provide improved means for so guiding the bit. Such means includes a supporting member or disk Ill having a socket therein for receiving a guiding bushing II which guides the bit in its movement to form a hole of the same shape as that contained in the bushing. For instance by having the bushing provided with a square hole the bit will drill a square hole in a work piece or by having the bushing of hexagonal shape the bit will make a hexagonal hole in the work piece. The bushing I I is removably held in the supporting member ID by a screw I2 passing through a hole I3 in the member l0. Bars l4 are connected at their lower ends to opposite sides of the member III by the bolts l5 and the upper ends of these bars have the longitudinally extending slots [6 therein for receiving the bolts ll projecting from the sides of the casing I. A spring [8 has one end fitting over the collar 3 of the casing l and its other end over a collar IS on the member I0, said spring tending to press the member l0 away from the casing and thus this spring acts to hold the "member ID with the bushing H therein against the work piece, thus avoiding the necessity of fastening the member ID to the work piece. This manner of slidingly connecting the member ID with the casing of the drilling device and providing a spring for yieldingly holding the member Ill against the work piece enables a workman to turn out work much faster than where it was necessary to fasten the bushing carrying member to the work piece.

In order to use the invention on a device of the type shown in the before mentioned patent to H. J. Watts the casing l contains all the movable parts which are rotated by the shaft 5, and in order to hold the casing stationary during the operation of the device a handle 20 is attached to the casing and extends at right angles therefrom so as to enable the workman to hold the casing against movement during the drilling operation. The device can be used for drilling any machineable material, such as brass, copper, bronze, steel, etc.

Having described the invention, what is claimed as new is:

In a drill device for drilling non-circular holes and including a casing, a rotary member in the casing, a bit connected with the rotary member and depending from the casing and a shaft extending into the casing and connected with. the rotary member for rotating the same, a work engaging member of considerable area and having its lower face flat for engaging the work and said work engaging member having a socket in its lower part and an opening extending from the top of the member to the upper end of the socket for receiving the lower portion of the bit, said socket having an enlarged lower end, a bushing seated in the socket and having a non-circular hole therein for receiving the lower end of the bit for guiding the bit, said work engaging member having a flange at its lower end fitting in the enlarged part of the socket with the lower face of the bushing flush with the lower face of the work engaging member, means for removably holding the bushing in the socket, bars having their lower ends connected with the work engaging member and having elongated longitudinally extending slots in their upper portions, bolts passing through the slots into the casing of the drill device, the upper face of the work engaging member having an annular centrally arranged projection thereon, a spring having one end fitting around said projection and its upper end engaging the lower end of the casing of the drill device for holding the work engaging member against a work piece and a laterally extending handle connected with the casing for holding the casing stationary during the operation of the device.

BERNARD ALBERT WOODS.