US1573901A - Utility tool - Google Patents

Description

'Patented Feb. 23, 1926.

FREDERICK J. BA1-INI,

or enema, ILLINOIS.

UTILTY TOOL` Application filed September 24, 1923.

o all Lo/wm et may concern Be it known that F nnnnnroii .l Banni, a

Vcitizen of the United States of america,

residing at Peoria in the county of Peoria and State of Illinois, has invented certain new and useful Improvements in Utility Tools7 of which the following is a specifica@ tion. i

My invention relates to utility tools and more particularly to an electrically driven hand tool adapted for drilling, engraving, milling and other work of similiar character.

The objectvof my invention is in the provision of an electrically driven hand utility tool adapted, due to a special reduction gear means,V of producing` the maxin'ium torque at the working point.

Another object of my invention is in the provision of an electrically driven hand tool adapted for use in millingand other line work whereby the usual vibration that attends such class of tools is reduced to a minimum and the lash of the cable not transmitted to the working point. Y

A still further object is in the provision of a hand utility tool wherein a maximiun torque is effected at the working point by means of reduction gears in the tool itself.

Yet another object of my invention is in the special construction of my utility tool wherein I have provided means for quickly releasing the chuck as well as trigger mechanism effective in such release.

Other objects of my `invention will appear in the following specification taken in conw nection withY the annexed drawings, in which 1- Figure 1 is a plan from abwe of my hand utility tool.

Figure 2 is a side elevation.

Figure 3 is an end elevation thereof".

Figure l is a sectional View taken on the line ele-1L of Figure 5.

Figure 5 is a sectional view taken on the line 5-5 of Figure l.

Figure 6 is an enlarged dela-i1 of my special trigger mechanism effective in the release of the chuck.

Referring to the drawings 10 refers generally to an integrally cast vmember including a hand piece 11, a gear casing 12 and a housing member i3 for one of the gear members to be later described and ya portion of the driving cable Vals(` to be describeth rlhe member 1li :is a

Serial No. 664,688.

casing` for the mechanism to be hereafter described.

1t may be said at this point that the preeent structure or tool is adapted to be used in any character of work where a plurality of various shaped tools are to be used. Again, it may he said that the present tool is adapted to be held by the operator. the. power means for said tool being `transmitted thereto by means of av flexible cahle'l/lin connection with any power means, not shown, usually an electric motor.

A casing for the cable is shown. or rather a portion thereof, at 15 Iin Figure 5, said cable casing having its reduced end portion 16 inserted. within the outer end ot' the housing 13 and maintained in engagement therewith by means of the set. screw 17 engaging the indentation 13 therein. This reduced portion or cable casing provides a bearing means for the end 19 of the. flexible cable. rFhe end Q() of the flexible cable has an engagement means thereon interlocking as at 21 with Vthe slotted portion 22 on a stub shaft 23 which rotates on the bearing 1G and has positively connected thereto the intermediate gear 2G. A setscrew inserted thru the housingl 13 locates the bearing 17 in a positive manner therein, also prevents withdrawal of the stub shaft and connected parts until removalof said screw. A second gear 2T driven by the smaller gear 2G is integrally formed as the base portion of the driving spindlf'I 28 which Iis slidably mounted within the hand piece 11. Means for holding the drive spindle within the gear casing and hand piece is provided in the jam collar or thrust bearing 29 which is screw-threaded as at 30 in the outer end of the gear casing. A wedge screw 31 and mounting 32 therefor prin ides means for tightening the gear casing about the jam collar after it has been inserted therein to prevent further rotation .of said collar in either direction. Insertable in the opposed open end of the drive spindle is a chuck 33 and chuck holder or draw spindle 34, respectively. The chuck and holder therefor are adapted for threaded engagement as shown at 35 and as a matter of fact this threaded engagement provides means Yfor fastening the chuck in a positive position rwithin the drive spindle. The chuck 33 has groove 36 thereon adapted to engagea Ilug ,3T j irojcfcting from the inner side of the drivel spindle. This lug and Y groove connection prohibits the insertion oi' the chuck to its full depth within the. drive spindle until the respective portions are in mesh, whereupon a threading ot'the drawing spindle upon the chuck draws it te its full depth. Within the drive spindle and fastens yit in positive operative connection therewith. The chuck 38 is of i'rrmal construction and has the conventional split end adapted to receive a plurality el' working tools.

A trigger means orholding the cable. 14 and drive spindle against rotation when it is desired to release the chuck member is shown clearly in Figures 1, 2 and 3 wherein the triggery 39 is pivoted on the set screw 40 which has a threaded engagement with a Vportionof the casing 12 just below the projecting end of the cable 14. This trigger has an opening 41, therein, wherein the projecting end of the cable normally rotates. However, the projecting end ,of the stub shaft is cut away as at 42 to provide a fiat portion thereon. in a similar' manner one 0ik thesides 43 of the trigger is iiattened to engage the fiat portion 42 on the cable when the trigger is moved sidewardly as shown in dotted lines in Figure 6. 'lo'resist the sideward movement ot the trigger and to normally hold the fiat side 42 away from the cable end, a spring 44 is fastened as at 45 to the housing 18 and also engages the triggery thru an apperture 46 therein. The trigger 39 has a thumb portion 47 thereon permitting ready movement thereof to stop the rotation ofthe cable and consequently the drive spindle when it is desired to remove the chuck for the insertion of a new tool.

,The above trigger mechanism which is adapted" to prevent rotation of the cable, and drive spindle has been supplied in order to permit the release of the chuck member S3 by the withdrawal of the chuck holder 34. In other words, by holding the cable from rotation by means of the trigger, the drive spindle is also held against rotation with the result that it is possible then to unscrew the chuck holder by rotating the handle portion'48 thereof, thereby releasing the chuck and hence any tool that may be held therein.

In view of the above description, the operation oic my tool will but briefly be considered. Rotation ot the cablelfi thru the reduction gears transmits movement to the driving spindle and thereby movement ot lthe chuck positioned therein by means oi' the chuck holder. To permit a change ol: tools in thechuck holder, movement of the trigger' member sidewise to prevent rotation of the cable also holds the drive spindle in a set position thereby permitting unscrewing of the chuck holder and the consequent release of the chuck and tool therein.

That l claim is Y 1 1. InV a utility tool, comprising a driving member, a tool portion connected thereto, said connection including a worm on the cable member and a gear on the tool pei tion, said tool portion having its operating end located at ak point substantially removed from the connecting means and mechanism permitting removability and engagement of plural tool members comprising a member passing through the gear member.

2. ln a utility tool, comprising a driving member, a tool portion connected thereto, said connection `including a worm on the driving member and a gear on the tool portion, said tool' portion having its operating end located at a point substantially removed from the connecting means, mechanism permitting removability and engagement of Vplural tool members comprising a member passing through the gear member, and a manually operable latch member adapted to prevent rotation of the driving member during the tool changing operation.

In testimony whereof I ali'ix my signature.

FRnDnRicK J. Bai-nn.

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