US1222513A - Combination stripping and splitting pliers. - Google Patents

Description

S. E. AARON.

COMBlNATION STRIPPING AND SPLITTING PLlERS.

APPLICATION FILED MAR. 14, l9l6.

1,%2%,51 3o Patented Apr. 10, 1917.

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SOLOMON E. AARON, 013 BOSTON,

JHASSACHUSETTS.

COMBINATION STBIPPING AND SPLITTING PLIERS.

Specification of Letters Patent.

Patented Apr. 10 1912.

Application filed. March 14, 1916. Serial No. 84,209.

To all whom it may concern."

Be it known that I, SoLoMoN E. AARON, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Combination Stripping and Splitting Pliers; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to tools, and more especially to wire strippers; and the object of the same is to produce a pair of pliers such as used by linemen and electricians who handle insulated wire, whether of sin gle or plural strands. The present inven tion is an improvement over my prior Patent No. 1,096,983, dated May 19, 1914, to the extent that a two-part guide is now used adjacent to the splitters and both the guide and splitters are adjustable to adapt the tool to insulated wire of various sizes. Also the present invention contemplates improve ments in the strippers, and adds devices which may be employed as a guide or as means for bending a wire. Details will be found. in the following specification, and reference is made to the drawings where- 1n Figure 1 is a side view, Fig. 2 an edge view, and Fig. 3 an outer end view of this improved tool.

Fig. 4 is a detail side view of one member thereof with the removable parts omitted.

Fig. 5 is a detail showing the active edges of the splitters in contact.

Fig. 6 is a side elevation of the element which constitutes the main guide, and Fig. 7 a similar view of a slightly modified form thereof.

The pliers are made up of two members 1 and 2 recessed at 3 on their contiguous faces at points where. the recesses engage each other so that these members cross each other and are pivoted at their point of crossing at 4, forward of which they are projected into jaws 5 and 6 adapted to stand about parallel to each other when the activeedges of the attachments engage, all as best seen in Fig. 1. In rear of the pivot 4 is a stop for limiting such closing movement. As here shown, the inner faces of the handles of said members are provided with bosses 7 into one of which is screwed a screw 8 having a milled head 9 for its adjustment, and by preference a lock nut 10 for holding it when adjusted, and the contact of the outer end of this screw with the opposite boss limits the closing of the members and therefore the closing of their jaws in a manner which will be clear.

The jaws are provided on one side face with notches or recesses 11 in which are seated cutters 12 held in place by screws 13, and the active edges 14 of these cutters come together when the tip of the screw 9 abuts against the boss and the stop is closed as described above. This attachment is obviously for the purpose of cutting off the wire when stripped of its insulation.

The outer end of each jaw is beveled inward as shown at in Fig. 4 and tapped with a screw hole as indicated, and lying across this end is a stripper 21 removably held in place by means of screw 22. The inner edges of these strippers are beveled off as at from the pivot 4, and their active edges close together on the line 24 when the stop is closed as above described. As seen in Fig. 3, said edges are cut out with three crescent shaped notches 25, 26, and 27 at points which will register with each other when the stripper blades are closed together, and the notches 27 are disposed in an extension or overhang 28 where these blades project beyond the sides of the jaws 5 and 6. This is for the purpose of permitting the electrician to tap in and strip the insulation from a piece of wire between two points where it is fastened, and obviously the stretch of wire so stripped will lie alongside the pliers which are moved longitudinally of the wire in the act of stripping. The holes produced by the other notches and 26 may be of different size as shown, but they lie within the contour of the jaws 5 and 6 as seen in Fig. 3, and these are useful for stripping an insulated wire at its end as well understood. The stop (which comprises the adjusting screw 8 and the boss co-acting with it) is useful for limiting the movement of the jaws toward each other, and may he set so that the co-acting notches in the stripper blades stand a little farther apart than seen in Fig. 3. As well known ..to those familiar with this work, it is not desirable to cut or scratch the wire while stripping the insulation therefrom. The electrician will therefore first set the 23 on that face which is remote stop properly for the size of the wire itself, then open the jaws and pass them over the insulated wire, then close the jaws as far as the stop will permit and thus cut through the insulation, then rotate the tool axially so as to cut the insulation all the way around, and finally draw the tool along the wire to strip off the insulation. The disposition of the bevel 23 on the outer side of the stripper blades and the inclination of their inner faces therefore has an advantage which will now be apparent. The former brings the active edges 24 toward the front in the line of movement when stripping, and said inclination causes the insulation to be deflected away from the wire in case it should be cut or buckled rather than slipped off the wire as is usually done.

The outer edges of the jaws are provided with notches or rabbets 30 as seen in Fig. 4, also tapped with screw holes at.

points which will not intersect those in the bevels 20, and in these rabbets lie the flat shanks 31 of a pair of splitter blades, said shanks being slotted as at 32 for the reception of screws 33 whereby the splitter blades are rendered adjustable. The shanks are carried outward and given a right angular bend as seen at 34 in Fig. 3, beyond which they are turned inward as seen at 35 in Fig. 5, and their active edges 36 meet each other when the stop is closed. These edges may be beveled on both sides as seen in Fig. 3, and their ends are rounded as seen in Fig. 5. The splitter is useful, as well known to those familiar with this work, for splitting the insulation which surrounds the individual wire insulation of a twin-wire cable, and the adjustment at 32 and 33 is obviously for the purpose of permitting the active edges of these splitter blades to be set at a greater distance from the side of the tool asseen in Fig. 2, as will be necessary if the cable is larger.

It is often desired to split the cable without injuring the individual insulation on the wires thereln, and in order that this may be successfully accomplished I provide a guide whose open or active end is of substantially U-shape as best seen in Figs. 6 and 7. The U--shaped portion is designated by the numeral 45 in these views and in Figs. 2 and 3, and laterally it is of a width sufficient to loosely receive the two-strand cable, whereas longitudinally its dimension is a matter of adjustment. In the outer edge of each jaw is cut a notch 40 as seen in Fig. 4, tapped for the reception of a screw, and lying in this notch is a shank 41 (see Fig. 2) having a slot 42 for the reception of a screw 43 whereby the shank may be adjusted like the splitter. As seenin Fig. 6, this shank is given a double bend to form a shoulder 44, beyond which it is bent into U-form to constitute the guide 45, and beyond that in turn it is extended into the other member of this guide. The guide is then cut at the point 46 at the center of its bend, thus dividing it into two members which meet and form the complete U-shaped guide when the stop is closed as above described. But when the tool is opened, these members separate at the point 46 the same as the active edges 36 of the splitters separate, and the cable may then be passed into the open guide and be tween the splitters, ready for the action of the latter thereon. Therefore the splitter and its guide are useful either at the end of a stretch of cable, or for tapping in at an intermediate point. If the cable should be larger than as shown in dotted lines in Fig. 3, it becomes necessary to loosen the screws 33 and 43 and set both the splitters and the guides a little farther outward, but in the adjusted position shown in the drawings they are adapted for the ordinary two-wire cable. The U-shaped guide broadly numbered 45 in Fig. 7, is in all respects the same as the one described excepting that the shoulders 44 are omitted. This makes its side arms straight, and their shanks may have to be secured by screws to the inner instead of the outer edges of the two jaws, as need hardly be illustrated as it is quite obvious. Such construction might require that the screws (which would be the equivalents of those numbered 43 in Fig. 2) be set into holes tapped a little nearer the side faces of the jawsfso that a screw driver could reach them when the pliers were opened to their widest extent. I prefer, however, to use the shoulders shown in Fig. 6, and to have the slots and screws on the outer edges as above described.

The guide above described is located adjacent the plier blades and rather remote from the pivot 4, and it might be called the main guide because I may sometimes provide another guide. The latter, as seen in Figs. 1 and 2, consists of a pair of pins 50 located preferably adjacentto the pivot, either forward or in rear of it, but spaced astride a line midway between the jaws and handles, so that the cable extending along side this face of the tool through the splitters and the main guide, can be passed between these pins which will then serve as a secondary guide. In addition, these pins may also be used for bending the free or stripped end of a wire, as often is desirable in order to make a loop or eye such as is to be passed over a binding post or engaged by a screw.

Another function and advantage arises from the angular disposition of the stripper blades 21 and the exact position of their bevels 23 and which, although not illustrated herein, will be clear to electricians and linemen. This is that they may be used for crushing the insulation, and especially the outer coating thereof, when a wire is to be stripped. At this time the wire stands in a line across the front end of the jaws 5 and 6 at right angles to their length, and parallel with the active edges 24:. The strippers are then separated slightly and the heavily insulated wire passed between them, and then by closing the strippers onto the same their sharp edges 24 cut into the insulation while their berels 23 cause them to travel away from the wire itself. This trick of the trade is often employed where the outer insulation is quite heavy and needs to be removed or at least loosened before the process of stripping takes place.

What I claim is:

1. In a tool of the class described, the combination with a pair of pliers, the outer edges of whose jaws are provided with transverse notches, and an adjustable stop between the handles of the pliers; of a pair of splitter blades whose shanks are mounted in two of said notches and whose active edges meet alongside the jaws when said stop is closed, and a pair of guide members whose shanks are mounted in the other notches and whoseends also meet when said stop is closed.

2. In a tool of the class described, the combination with a pair of pliers, and an adjustable stop between their handles; of a pair of splitter blades whose shanks are se cured to the outer edges of the jaws and whose inner ends are bent over one side of the same with their active edges contacting when said stop is closed, and a U-shaped guide out through its bend into two members also meeting when said stop is closed, the shank of each member being secured to the outer edge of one jaw and its body carried over the side thereof.

3. In a tool of the class described, the combination with a pair of pliers, and an adjustable stop between their handles; of a pair of splitter blades secured to the jaws and bent over to one side of the same with their active edges contacting when said stop is closed, and a U-shaped guide out through its bend into two members adapted to coact when said stop is closed, the shank of each member being secured to one jaw and its body extending into the bend of said U.

4. In a tool of the class described, the combination with a pair of pliers, and an adjustable stop between their handles; of a pair of splitter blades whose shanks are secured to the outer edges of the jaws and whose inner ends are bent over one side of the same with their active edges contacting when said stop is closed, and a U-shaped guide out through its bend into two, members also meeting when said stop is closed, the shank of each member being secured to the outer edge of one jaw and given a double bend to produce a shoulder extending over the side of the jaw, and its body extending from such shoulder into the bend of said U.

In a tool of the class described, the combination with a pair of pliers, and adjustable means for limiting the closing movement of the jaws; of a pair of right angular blades whose coacting edges stand along one side of the pliers, a U-shaped guide out through its bend into two coacting members also standing along one side of the pliers, and means for permitting adjustment of the shanks of said blades and members transversely of the jaws.

6. In a tool of the class described, the combination with a pair of pliers, and adjustable means for limiting the closing movement of the jaws; of a pair of right angular splitter blades whose cutting edges stand along one side of the jaws and whose shanks are passed over the outer edges thereof and slotted, screws passing through the slots into the jaws, a U-shaped guide standing adjacent to said blades and cut through its bend into two members, the shank of each member passing over the edge of the jaw and slotted, and a screw passing through said slot into the jaw.

7. In a tool of the class described, the combination with a pair of pliers, and a pair of splitter blades carried by the outer edges of the jaws with their active edges contacting alongside the same; of a main guide made in two members respectively secured to the jaws adjacent to said splitters, and a secondary guide in line with the main guide and consisting of two spaced pins projecting from one of the members of the pliers.

8. In a tool of the class described, the combination with a pair of pliers, and a pair of splitter blades carried by the jaws thereof with their active edges contacting alongside the same; of a main guide made in two members also carried by said jaws between the splitters and the plier-pivot and adapted to open when the jaws open, and a secondary guide in line with the main guide and on the opposite side of said pivot therefrom.

In testimony whereof I affix my signature in presence of two witnesses.

SOLOMON E. AARON.

.Vitnesses N. L. OoLLAMEn, JOHN L. FLETCHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of atents Washington, D. G.

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