US2320679A - Bolt rotating tool - Google Patents

Description

J1me 1, 1943.

J. J. TAYLOR Y BOLT ROTATING wodn Original Filed June 21, 1940 Patented June 1, 1943 BOLT ROTATING TOOL John J. Taylor, Wadsworth, Ohio, assignor to The Ohio Brass Company, Mansfield, Ohio, a corporation of New Jersey Original application June 21, 1940, Serial No. 341,715. Divided and this application June 11, 1942, Serial No. 446,673

2 Claims.

This invention relates to insulators and in its more specific aspects relates to a fastening for an insulator and a tool for manipulating the fastening.

The object of this invention is to provide an improved fastening for insulators and a tool for tightening and loosening same.

Another object of the invention is to provide a slotted head fastening or screw and a tool for turning the screw when it is positioned in the insulator.

A further object of the invention is to provide a screw fastening for divided insulators in which the screws are arranged in slots and a tool for turning said screws in said slots.

Other objects will occur to those skilled in the arts to which this invention pertains as the description which taken in connection with the accompanying drawing sets forth the preferred embodiment thereof but such disclosure is not to be construed as a limitation of the invention which is limited only by the appended claims and any and all modifications, alterations and variations of structure coming within the spirit and scope thereof are deemed to be included herein.

In the drawing:

Fig. 1 shows an elevational View of the screw used in the insulator fastening.

Fig. 2 shows a side elevational View of the operating tool.

Fig. 3 shows a front elevational view of the operating tool.

Figs. 4 to 6 show various operating positions of the tool in the screw for rotating same.

This application is a division of previous application, Serial No. 341,715, filed June 21, 1940, now Patent No. 2,291,846, issued August 4, 1942.

For many installations it has been found advantageous to equip high potential insulators and particularly post insulators with end caps having recesses therein for receiving the heads of nuts or bolts, the recesses being provided with retaining ledges having peripherally opening slots through which the bolts extend. These recesses are made of a size to fit easily about the head or nut of a bolt and prevent rotation thereof. Each recess is open at its outer face to receive the bolt head or nut. Heretofore lotted fittings of this kind could be secured only to plates or flanges having perforations for the attaching bolts and having sufficiently unobstructed space on the side opposite the cap to permit operation of a wrench to tighten or loosen the nut on the connecting bolt. Prior to Ill.

the present invention it has been impossible to connect two such fittings face toface because if the head of the bolt were placed in a recess in one fitting and the nut in another neither of the two could be rotated to thread them together.

The present invention overcomes this difiiculty by providing the bolts with specially castellated cylindrical heads and a special form of operating tool by means of which the head can be rotated any amount desired by the limited angular movement of the tool allowed by the open side of the recess in the cap.

Referring more specifically to the drawing the numeral It, designates a portion of one of two insulator caps adapted to be placed one upon the other in the position they would occupy for connecting two insulators together in a stack a more specifically shown; in the above identified' application. The two maps are duplicates and each is provided with a plurality of recesses, only one of which is shown, partially closed by flanges [3 providing. a slotv l4 therebetween for bolt l5. Each. bolt is provided with an integral, cylindrical, castellated head' It, each head having four circumferentially spaced abutments ll. The opposite end of each screw is adapted to be threaded into a nut which fits in the recess in in the other cap or threads into an appropriate base. The abutments I! are preferably made of hardened and drawn steel and have cylindrical inner faces as shown in Figs. 4, 5 and 6. In assembling the parts the nuts are loosely threaded on the bolts and the screw and nuts together are slipped into place in the slots I l and are turned by rotation of the screw. This is accomplished by means of the tool l9 shown in Figs. 2 and 3. Preliminary tightening may be done by the ,beveled end 20 which can be used to engage the abutments l1, although the tool is made of hardened and drawn steel this beveled point can hardly be made strong enough to tighten the nuts as much as is desirable. The other end of the tool is therefore provided with an angularly disposed portion forming a head 2| for producing the final tightening. At the bend the tool is preferably slightly flattened as shown at 22 to spread the stock and increase resistance to bending in the plane of the angle. The inner edge of the flattened portion is rounded at 23 to fit the faces of the abutments ll when the tool is in operating position as shown in Figs. 4, 5 and 6. The rounded surface provides a stop 24 to limit inward movement of the tool. A rounded notch 25 is formed in the inner face of the tool adjacent the end of the operating head 2|, the radius of curvature also being the same as that of the faces of the abutments ll. The inner face 26 of the head is beveled off substantially on a plane tangent to the curves 23 and 25. In operation the head 25 is inserted between the abutments I! as shown in Fig. 6. It will be 'noted that in this position the handle of the tool clears the wall of the recess l4 when one of the abutments H is at the middle of the open side of the recess. In inserting the tool the notch 25 is first placed in engagement with the outermost abutment I! in a, manner similar to the position shown in broken lines in Fig. 4, which will provide clearance for the forward corner of the tool to pass the next adjacent abutment as the tool handle is swung to the right and the tool advanced to the full line position in Fig. 6. The tool i now moved to broken line position in Fig. 5, thus rotating the bolt and partially threading it into the nut or supporting base. The tool is then swung about the axis of the head 2| to full line position in Fig. 5 and the handle moved further to the left into the full line position in Fig. 4 thus completing a quarter turn of the bolt. The tool may then be drawn outwardly and swung to the right as the inner end of the head clears the innermost abutment. When the notch 25 contacts the outermost abutment the tool may be rotated about the vaxis of this abutment to'the broken line position in Fig. 4. By now moving the tool to the left it may be easily withdrawn and the operation repeated until the nut is tight. The nut may be loosened by an operation reverse to that just described. The arrangement makes it possible to use a tool of maximum size and strength for the limited space available. The tool as well as the bolt head is preferably made of tempered or specially treated steel to provide maximum strength for its size.

I claim:

1. A tool for rotating a bolt having its head castellated to provide abutments, the inner faces of which are substantially semi-cylindrical surfaces, said tool comprising a bar having an operating portion at one end bent at an angle to the axis of said bar, 5, notch adjacent said one and. the surface of said notch being curved to conform to the curvature of the inner surfaces of said abutments, the distance from the axis of curvature of said notch to the farthest free end point of said operating portion being slightly less than the distance between the axis of curvature of the inner surface of one of said abutments to the nearest point on the surface of the next adjacent abutment so that when the surface of said notch contacts the cylindrical surface of one of said 7 abutments the end of said tool may be swung past the next adjacent abutment about the axis of the contacting surfaces and other curved surfaces formed on the inner side of said bent operating portion having a curvature adapted to conform to said abutments, said second surfaces employable when said bar is rotated about its own axis.

2. A tool for rotating a bolt or screw having a prising a rod having one end thereof bent to form.

an operating head portion, said head portion be-- in slightly flattened at the bend thereof and having a semi-circular notch in the angle of the: bend forming a shoulder to limit movement of said tool into operating position relative to said. bolt head, said notch being curved to conform to the curvature of said castellations, said tool hav-- ing another notch on the angle side of said op-- erating portion adjacent the end thereof, said operating head having an inclined surface connecting said notches to facilitate manipulations of said tool, the distance from the axis of curvature of said last named notch to the farthest free end point of said operating portion being slightly less than the distance between the axis of curvature of the inner surface of one of said abutments to the nearest point on the surface of the next adjacent abutment so that when the surface of said notch contacts the cylindrical surface of one of said abutments the end of said tool may be swung past the next adjacent abut-ment about the axis of the contacting surfaces.

JOHN J. TAYLOR-

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