US2133005A - Electrician's tool - Google Patents

Description

Oct; 11, 1938. w. WOLLENWEBER ELECTRICIANS TOOL Filed Jan. 8, 1957 INVENTOR W112. W0 ll en web er ATTORNEY specification and. claim.

Patented Oct. 11, 1938 ,UNITEDSTATES 'ELEorRroIAN's 'rooL' 3 William Wollen weber, Sacramento, Calif.

Application January 8, 1937, Serial no. 119,659 mm. on. 819.5)

This invention relates generally to an electricians tool and in particular relates to, and it is my principal object to provide, an electricians tool designedto facilitate "the removal of the covering and insulation from electric Wire at those points on the wire where connection with other wires is to be made. f

Heretofore, electricians have usually used a common jack knife or other hand knife to remove the covering and insulation. Not only was this a rather difficult and clumsyoperation, but it required too long to prepare and make the connections between separate wires. To overcome'these objections to the use of. a." common knife, I have produced the herein described tool.

'A furtherobject of my invention-is to provide an electricians tool which may be effectively used to twist one wireaboutanother and to make a'tight connection and positive contact between the wires. The tool is alsoprovided with wire stripping and cutting means. 7

A further object ofthe invention is to produce a simple and inexpensive devicefand' yet one which will be exceedingly effective for the' purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following In the drawing similar characters of reference indicate corresponding parts in the several views:

Fig. 1 is a side elevation ofthe tool the 1 tool bar raised from the case.

Fig. 2 is an end view of the tool.

Fig. 3 is a fragmentary sectional elevationi taken'on line 3-3 of Fig. 2.

Fig. 4 is 4--4 of Fig. 1. r

Fig. 5 is 5-5 of Fig. 1. V

Fig. 6 is a transverse section 6-6 of Fig. 1.

Referring now more particularly tothe charr acters of reference on the drawing, "my; im-

proved tool comprises a case or frame similar in construction to the case of an ordinary jack knife. A tool bar 2 is pivoted, as'at 3, within the case at one end thereof for swinging V movement in and out of the case. A snap spring of the character commonly used in folding knives is employed in connection with the tool bar 2 and is disposed in the bottom ofthecase. The tool bar is formed at itsouter or free end with a head, indicated generallyat 4, of

a transverse section taken on line a transverse section taken on line 7 taken on line J .case to one side of the toolbar or on the opposite side of partition 6. A ring 9011 the outer end of the tool bar serves as a means for easy withdrawal of the toolbar from the case.

The head 4 is formed with a passage Illextending from its inner to the outer edge, said passage being tapered as shown. The sides of the head'lintermediate, the: ends of the passage and at the inner edge of the bar are notched as at H, the edges of the notches being .sharp. The notched portion has another inward and smaller notch I 2 for the purpose hereinafter described." V

A cutting blade l3, preferably hollow ground,

is secured on the lower edge of the tool bar.

by a bolt l3. 'the cutting edge projecting between the sides of the head and into the passage to a termination close to the notch I2 and 'just inwardly'of the bottom of the sharp notches II. The blade is slotted, as at I5, and thus is adjustable, Both sides 5 of the case are notched, as at l6, toform a cradle for the pur pose hereinafter described, said cradle being so disposed as to match notches II when the tool bar is in lowered position. A bumper or stop l1, preferably of, rubber, is disposed in-the case at .thefforward end and serves to limit downward movement 'of the tool bar, the head 4 striking said'fbumper with the downward or closing movement of the bar.

The forward end of the case is formed with a two longitudinally extending holes 18, one being of a'greater diameter than the other; A transversely extending, substantially semi-circular groove [9 isformed in the case end immediately below said holes.

. Intermediate the ends of the case, the sides 5 are drilled with transversely alined holes 20, while the tool bar is notched, as at 2] the notched portion being sharpened on one side to a cutting edge ZZ-and which edge, when the tool bar is in closed PATENT oFricE f position, terminates in a plane. a short distance above the'center of holes 21 as clearly shown in Fig.5.

Adjacent the rear or pivot end of the case, the

,upper edge of sides 5 are notched as at 23, one

inside edge 24 being sharpened. The tool bar is formed with a corresponding notch 25 having af sharpened and cooperating cutting edge 26,

Us 'e 7 lows:

To expose a portion of the wire in a length of and the Wire disposed in the cradle 'formed by notches lfipThe tool bar is then lowered or snapped down until notches ll engage the wire. (See Figs. 3 and 6.) The entire tool is then rotated about the wire &or 4 times in a clockwise direction. With such operation, the notches I! first scare the insulation and covering, and their the blade l3 cuts away. the covering and insulae tion and the uncovered portion of the wire then engages in small notch l2 andthus cannot be nicked or out. The covering and insulation cut away as shavings, escapes through tapered opening l0. Ifdesired, duai blades (oneon each side of the opening} may be'used rather than'a single blade as shown. g 1

To connect another wire A to such exposed portionoi wire B, the bare end of the other wire is placed in one of holes I 8 (whichever the correct diameter); and the wire B placedein groove I 9 and the tool passed about vgire B causing wire A to be woundrtightly about vgire B. The initial position of such wires is shown in dotted lines inFig. 3. W i

To strip the covering from the end of a wire, the wire-is placed threugh holes 20, the tool bar lowerged; and the tool then rotated about the wire, illustrated in Fig. as 0. Cutting edge 22 cuts through the covering and insulation but In use, my ilIHJIOVGd tool is employed as folstantially fulfills the iibjects of the invention as set forth herein. v 7

While this ispecification sets forth in detail the present and preferred construction of the device, a still practice such deviations from such detail mayfloe resorted to as do not form a departir fromthe'spirit of the invention, as dei ined by the appended claim. 1

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

An electrieians tool comprising a case having spaced sides fa tool bar pivoted in the case at one means mounting said blade on the'head with the I cutting edge thereof in position between said sides of the head and adjacent the passage, whereby with relative rotation between the tool and wire on the cradle and engaged by the head, the cutting blade will cut away the covering and insulation of the adjacent portion of wire.

' WILLIAM WOLLENWEBER.

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