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Publication numberUS2440852 A
Publication typeGrant
Publication dateMay 4, 1948
Filing dateFeb 13, 1945
Priority dateFeb 13, 1945
Publication numberUS 2440852 A, US 2440852A, US-A-2440852, US2440852 A, US2440852A
InventorsDouglas Elford Frank
Original AssigneeDouglas Elford Frank
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Drill rig
US 2440852 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

F. D. ELFORD May 4, I948.

DRILL RIG Filed Fe 13, 1945 ix 3mm f'ra/r/r 17. E/fard Patented May 4, 1948 anussz Frank Douglas Elforcl,

Victoria, British Columbia, Ganad Application February 13, 1945, Serial No. stress L 3 Claims.

the beams with a minimum of effort and exertion req ired. t

More specifically, the invention embodies the provision of a rail from which the drill is suspended and slidably mountedthereon together with means for pressing the drillagainst a beam in which the holes are to be drilled and including a lever pivoted to the rail and connected to the handle of the drill forvmoving the drill forwardly during the drilling operation.

A further object of the invention is to provide a drilling rig of this character of simple and practical construction, which isstrong and durable, which may be easily and quickly attached to a conventional form of electric drill and which otherwise is well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the de tails of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure -1 is a side elevationalview.

Figure 2 is a sectional view taken substantially on a line 22 of Figure 1.

Figure 3 is a sectional view taken substantially on a line 33 of Figure 2.

Figure 4 is a fragmentary end elevational view of the up er end of the lever.

Figure 5 is a side elevational View thereof.

Figure 6 is an end elevational View of the clip adapted for attaching the handle of the drill to the supporting rail and with the link connecting the lever with the clip shown in section.

Figure '7 is a side elevational view thereof.

Figure 8 is an end elevational View of the clip slidably supporting the drill on the rail.

Figure 9 is a top plan view of the link connecting the lever with the clip for the handle of the drill, and

Figure 10 is a side elevational view thereof.

Referring now to the drawings in detail wherein for the purpose of illustration I have 2 A A disclosed a preferred embodiment of the invention, the numeral 5 designates a rail of rectangular shape in cross-section and on which an inverted substantially U-shaped clip 6 is slidably mounted, the legs of the clip having screws 1 freely inserted therethrough forthreaded engagement with the opposite sidesof the handle 8 of a portable electric drill 9.

The clip 6 slidably supports the drill on the rail 5 and the central portion of the clip is offset as indicated at It to provide a recess II in its underside to snugly receive the edges of the .rail 5 during sliding movement of theclip and. to prevent lateral play of the drill on therail.

A second clip l2 of substantially inverted U- shaped formation has its upper portion formed with a substantially T-head l3 in which the rail 5 is slidably received, the legs of the clip l2 extending downwardly behind the handlel8 and have arms I4 welded or otherwise suitably s6 cured to the legs and projecting forwardly at opposite side of the handle .8 and provided with openings l5 adapted for selectivelyfreceiving bolts or. screws I6 for, attaching the front ends of the arms to the handle. A l

' A lever ll has its upper end pivoted between the legs 18 of a substantially U-shaped clip I9 by means of a pin 20, the cliplB beingslidably mounted on the rail 5 and secured in longitudinally adjusted position thereon by means of a setscrewZl, A A A A link 22 has its rear end pivoted to the upper portion of the lever by means of a pin 23 and extends forwardly for pivotalconnection between bar having longitudinally spaced notches 29 in its lower edge adapted for engaging a lug 30 formed in the bottom of the bracket 21.

A plunger 3| is slidably mounted in the top of 3 34 at its front end, the hook being adapted to engage a beam 35 extending downwardly from a deck head or similar structure 36.

By adjusting the rack bar with the hook 34 of the rack bar in clamping engagement with the beam 35 the drill 9 will be supported in a position for drilling holes in the beam 35, a forward pressure being exerted on th drill. by a. rearward movement of. the lower end of: the lever ll.

Where the decking 36 is formed with additional beams such as indicated at 31, sufiiciently.

close to the beam 35 to permit the rear end of end of the lever moves the drill on the rail, a rack bar having a, hook on one end adapted to extend the rail 5 to abut the beam 31, the rack bar 28 and hook 34 are not required and may be re-.

moved and by loosening the set screw 21' the rear end of the rail 5 may be slid outward in abutting engagement with a beam 31 and inv operation.

the drill slides forwardly on the rail bvmeans. of the sliding clips 6 and I2. The pin engaging the rear edge of the; handle 8 of the drill prevents pivotal'movemenir of the drill on the screws drilling operation;

The rai15 maybe easiiy removed from-theclip 6, l2 and. 19 by releasing theset screw 2!- and the clips Gand', ITmay-a-lsobe quickly detached from thehandle B of the drill for-interchangeable sew h Qther r l's; whe desired;

It is believed that the details of construction, manner of operation and? advantages of the device will be readily understood from the foregoing without further detailedexplanation. Having. thus described the invention, what I claim is:

1, In an attachment for'an' electric drill1 having a. motor 19 15315; driilaholding chuck and a and. r m x ombinatio i hic m ses a longitudinally, extending rail positioned parallel the. axis.ofi aididril ehold ne huck a li li ably attafi ng the rail to the h l sing' through the handle thereof, a depending lever suspended from. saidrail, a clip pivotally andadjustably mounting thel'ever onthe, rail, another clip attachedto the handgrip ofthehousing having a socket, in the. upper end slidabie' over th rail, and a link, pivotally, connecting the lever to the clip on the hand grip wherein forward movement of the lower. end of thelever moves the drillon therailr 2.. In an. attachment for; an electric drill having; a motor, housing, adrilL-holding chuck and a hand grip, the, combination which comprises a beyond the end of the drill with the rack bar extending, through a, socket in the lever, said rack-bar having'notches therein, and a spring pin urging said rack bar toward a p jection in the. ,socketlot'the lever to hold the bar with one of thenotches thereof on said projection.

3. In an attachmentfor an electric drill having a motor housing, a drill-holding chuck, and ahand grip, .thelcombinationwhich: comprises a horizontally. extending rail positioned: parallel to the axis. of said 'drilli-holding: chuck, a cl ipislidably attaching the rail to the housing; through the handle thereof, a depending lever-suspended from said. rail positioned: beyond one end ofthe housing and aligned; therewith, means-pivotally andi adj'ustahly the upper endof? the lever onthe rail;:a-.socket fixedly moun'ted on; the hand grip-of the housingthmugh which the rail extends, a linltf-pivotallgrconnecting the=leven to the: socket: wherein movem'enitofithe lower: end of the lever slides the drill and motor housing along the rail,-. a rack; bar having a hook on one end adapted to.- ext'en'dl beyond the: end of. the? drill withthe rack bar extending through: a socket in' thalever; said rackrbar havingi notches therefin, a,nd a. spring'pina positioned 'inthe socket in the lever urging-said rack' bari r ward; a ppoj'egtion in: the socket of "the lever to hold? the bar with one of the notchesgtherein in registering relation'witltsaidiproictlonl u FRiA-NKZ' DQUGEAS The followin refe enced are o necordi in; the l ofg hiamtenti.

STATES, retains Number Name gate van lifusen t al'i Dee-211 1837 975,031 Greene..."e e N v 85,1910

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US595896 *Sep 13, 1897Dec 21, 1897 Boring-machine
US975031 *Jun 3, 1909Nov 8, 1910William Harvey GreeneDrill-feed.
US1486933 *Nov 21, 1921Mar 18, 1924Gilbert Arthur MRail drill
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2879677 *Oct 25, 1957Mar 31, 1959Baublitz Merritt HSupporting and operating device for drills and the like
US3250153 *Jan 27, 1964May 10, 1966Everett W PurkeyPortable drill press
US4403892 *Nov 3, 1980Sep 13, 1983Kane Patrick JApparatus for driving fasteners and other insertable objects into remote structures
US4442905 *Aug 6, 1981Apr 17, 1984Agoston Edward EJig assembly for drilling vertically upward
US4736804 *Dec 9, 1986Apr 12, 1988Geibel Jeffrey BOverhead drill jig
US6021854 *Apr 24, 1998Feb 8, 2000Scarola; RalphAdapter handle for power tool
US7237707 *Jul 28, 1999Jul 3, 2007Dean EldridgeHandle for trigger operated tool
DE1225467B *Dec 22, 1962Sep 22, 1966Hermann DeiningerVorschubvorrichtung fuer motorisch angetriebene Handbohrmaschinen
U.S. Classification408/99
International ClassificationB25H1/00, B23B45/00, B23B45/14
Cooperative ClassificationB25H1/0057
European ClassificationB25H1/00C4