US873771A - Screw-driver. - Google Patents

Description

No. 873,771. PATENTED DEC. 17, 1907. .1. MOODY. SCREW DRIVER.

APPLICATION FILED JAN. 7, 1907.

Gunmen:

, frame with Ioppositely facing.y bevel UNITED STATES ,PATENT orrrcn JOHN- MccoY, or VIENNA Gnoss norms, onIo.

To all 'whom it may concern.'

Be it-known that I, JOHN McCov, a citizen yof the United States, residingat Vienna `Cross Roads, in the county of Clark and justable bracket abovea work bench and are adapted to be moved to anydesired position above the bench to. set a screw in any part of' the work 'carriedfby the bench. The-object of the present invention is' to provide ari-instrument of this character which the screws. can be inserted in any suite able mannerand will be su portedand set without 'other manipulationfby the operator than the operation of the screwfdriver; and to provide an improved screw holder for supe portingthe screw while it is being driven; and further to rovide an improved frame for supporting t e screw-driver proper;- and to provide the` device with means for' drilling the work to form apertures in which to 'start the screws. 1

With these objects in view my invention consists in certain novel features of con-A struction hereinafter to be described, and then more fully pointed out in the claims.

In the accompanyin drawings, lii'scsgurey 1 is a side elevation of a invention ,Fi 2' is a detail view of the-screw holder; and 3' is a detail view ofthe handle on the screw-'driver shaft and the drillchuck-mounted on the same.

Inthese drawings, in which I have illusT trated the preferred form of' my device, the reference lnumeral 1 indicates the support? ing frame which'is preferably of cast metal and substantially U-shaped. rihis frame is provided at its rear with a suitable swiveledv connection 2 forV connecting. thesame w-ith the supporting bracket, which forms no art,

of the present mvention and is not 're shown. The ends of the4 U-shaped ortion are' provided' with bearings 3 1n w I"ch is mounted a shaft. 4 whichvhas both a rotatory and a yreciprocatory movement relativelyto said supporting frame. l Theshaiit 4. is provided l tween the arms of the 3U=shaped SpeQication of- Letters Patent.

Application and January?. 1901.. sans No. 351.051'A evice embodying my Patented. D430. 17', 19.017..

one of' which, 5., is splinedorotherwise secause the same to. rotate in'um'son therewith., the other of the said pinierisv 55, be' n loosely mounted on said shatt to. allow sai shaft bothfa rotatoryand areciprocatory movement independent offsaid pinion'. Suit'- able sleeves 6 are mounted upon the shaft 4e and extend between thepini'ons-5' and 5;- and the arm 7 forming.` part ofthe frame'l and provided with an aperture through whieh cured to the shaft 4 1n such a manner as` to l allow the shatt .to reciprocate therein, but to theshaft 4;` entends. These sleeves serve to hold the pinions 5 and 5 their properp'osif.- tions against the bearings 3 of' the frame and to. ermit the shaft to reciprocate therein.

he member or arm 7 of' the frame i is preferably cast integral therewith, andkas stated is provided near its outer end with an" aperture. through which the shaft 4 passes and has its. outer end' turned down' orotherwise provided with a stud-shaft 8 u on which is mounted a. bevel gear 9:'adapt f to mesh with the bevel pinions- 5 and 5- on the shaft 4s, the pinion 5 serving to drivethe shaft Ae, while the pinion 5a serves. merely asa guide for the opposite side of the bevel gear 9'- to hold the same in proper engagement with the driving pinion 5. The bevel ear 9= is provided with a suitable handle 1:0# or rotating the same. This handle may be secured to the pinion any desired manner, but I prefer-to. mount the handle 10,u n the outerendof the shaft 8 and connecttJ esame with the gear 9 by a suitable ratchet mechanism,

here shown as inclosed in a casingf 11, which is preferably of the reversible type, whereby'- the directionofl movement of the handle-1) maybe reversedand the shaft 4 driven in the op osite direction. e f

' e lower end of the shaft 4 belowthe lower arm-foi the bracket 1 is ro.

extends vided with a suitable screw-driverlf, w "le f that portion of the shatt which extends` above thel u f arm of the U-shaped bracket l is pfiirefvided with a". handle 13 loosely Y lo itudinal maval-nent thereon. A spring le 1s coiled about the shaft 4a between the lower side oi' the handle 13 ,and the upper 'really in its elevated 'itiombut to permit thesame to be meve downward when pres,- Vsureis exerted upon the handle iSv-to cause the screwfdriver to toliowtlne screw as it is, set into the wood. 1* .v

mounted thereon "but held against i bearin 3l and serves to hold the shaft 1f-nor# f screw-threaded The shaft 4 is preferably extended beyond I the handle 13 and the projecting end thereof is provided with a screw thread, .as shown at 15, adapted to receive a tool chuck 16 which may be provided with a suitable drill or bit 17 for boring the wood to provide an aperture in which to start the screws.

The lower arm of the U-shaped bracket 1 provided with a tube 18 which surrounds the lower end of the shaft 4 and the screwdriver carried thereby and is secured in any suitable manner to the lowr bearing 3. The tube 18 is provided with a feed conduit 19 extending at an angle thereto and preferably having` its mouth flared, as shown at 20. Secured to the lower endof the tube 18 is a screw holder 21, preferably having its upper end provided with an internal screw thread 22, by means of which it is secured to the tube 18. This screw holder preferably con` sists of a cylindrical casing 23, in the upper end of which the screw thread 22 is formed, the lower end being provided with jaws 24 having their inner faces beveled, as shown at 25, and rovided with an aperture 26 at the lower e ge thereof. These jaws are preferably two in number and are formed substantially semi-circular. Springs 27 are secured at their u per ends to the casing 22, as shown at 28, an at their lower ends to the jaws 24 and serve to hold the jaws normally in their closed position.

In order to adapt the screw holder 21 to hold screwsof various sizes, the-same is provided with an internal guide 29 which is preferably in the form of a cylindrical tube fittin within the casing 23 and provided with a s oulder at its upper end, as shown at 30, which is adapted to engage a corresponding shoulder 31 formed near the base of the portion 22 of the casing 23, thereby supporting the guide 29 in its roper position in the casing 23.' These gui es are readily removable and are made with the in tern'alibore of different sizes to correspond to the diameters of the heads of the several standard sizes of screws, and, by simply re moving one guide and inserting another, the

holder can be adapted to receive any of the standard sizes of screws and to hold the saine in a vertical p5s1tion`whi-le it is being set into the wood. The guides 29 are referably formed all of one size having their ower ends tapered, as shown at 33, and are then bored centrally to provide the same with an internal aperture of the proper diameter. This boring of the guide 29 cuts away a portion of the tapered lower end thereof corresponding to the diameter of the bore and causes the lower ed e of the same to be substantially flush witlgi the beveled inner face of the jaws 24 so that the face 25 of the jaw practically .forms a continuation of the guide 29 and the screw head is at all times in contact with the guiding surface.

Avice is mounted, is preferably The operation of the device will be readily understood from the foregoin description. The screw is fed into the con uit 19 either by hand or in any suitable manner and falls by gravity through the lower end of the tube 18 into the holder 21 which has been provided with a tubular guide 29 having a central bore corresponding to the diameter of the head of the screw. Thus as the screw drops into said guide and its Ypoint moves into engagement with the aperture 26 in the lower end of the jaws 24, the screw is held in a substantially vertical position.k The handle 13 is then depressed against the tension of the spring 141.",to move the screw-driver 12 into engagement with the slotted head of the screw.I The handle 10 is then operated to rotate the screw-driver and the screw is set into the wood, continual ressure being exerted upon the handle 13 to old the screwdriver continually in engagement with the slotted head of the screw. As the screw moves downward the jaws 24 separate against the tension of the springs 27 and allow the head of the screw to pass through the same. After the screw has been fully set the pressure is removed from the handle 13 and the spring 14 immediately moves the shaft 4 to its elevated position and retains the parts in their normal position. When it is desired to set screws in hard wood, it is desirable to bore the wood to provide the same with an aperture in which to start the screw. In order to accomplish this as readily as possible I have provided the end.

of the shaft 4 opposite that end which carries the screw-driver 12 with a chuck 16 which may be provided with a bit or drill 17 of a proper size to provide an aperture for the screw which is to be set. The frame 1 being provided with a swiveled connection 2 can be readily inverted to` bring the bit 17 into operative relation with the work` The swiveled connection 2, upon which the delaced midway of the bit 17 and the tool older 21 so that the inversion of the frame 1 will bring either the bit 17 or the screw holder 21 into proper relation with the work withoutl further adjustment of the supporting means.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

Havin thus fully described my invention, what I c aim as new and desire to secure by Letters Patent, isz- 1. In a device of the character described, the combination, .with a substantially U- shaped frame, an apertured member carried thereby between the arms of said U-shaped frame and extendin substantially parallel with said arms, a sha mounted in said arms and extending through said apertured meiniio ber and having both afrotatory and a reciprocatory movement relatively to said frame, a bevel inion mounted on said shaft to cause said sliaft to rotate therewith and to permit the same to reciprocate independently thereof, a bevel gear mounted on said apertured member beyond said shaft and adapted to mesh with said bevel pinion, means for rotating said bevel gear, and a screw-driver bitcarried by the lower end of said shaft, of a screw holder supported from said frame and adapted to rece1ve said bit.

2. In a device ofthe character described,

said handle, a screw-driver bit mounted on the other end of said shaft, and a -swiveled connection for securing said frame .to a support, of a screw holder carried by said frame and adapted to receive said screw-driver bit.

3. In a device of the character described, the combination, witha frame and a screwdriver, of a screw holder comprising a casing, spring-pressed jaws mounted beneath said casing and having their inner faces beveled, a removable guide mounted Within said casing and having its lower end tapered to correspond with the beveled innerv faces of said jaws, substantially as described.

i In testimony whereof, I aIiX my signature in presence of two witnesses.

JOHN MCCOY. Witnesses:

A. C. LINK, EDWARD T. REED.

Images