US1652722A - Combined tool - Google Patents

Description

W. F. LOEFFLER COMBINED TOOL Filed Jan. 1925 $2 555 Qnoentoz x WNiamFLoeffIer- I QZW;

Patented Dec. 13, 1927.

UNITED STATES 1 PATENT OFFICE.

COMBINED- TOOL.

Application filed January 22, 1925. Serial No. 4,077.

My said invention relates to a combined tool fortesting a snark plu and I01 turning the nut at the upper endof the spark plug as when a plug is to be removed or replaced. it is an object of my lnvention to provide a device of the character described which shall be simple and inexpensive to manufacture and which shall notbe liable to get out of order. j

A further object'of the invention is to provide a device of the character indicated which can be carried conveniently in the car without taking up undue space or being liable to injury.

Referring to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate similar parts, I

Figure 1 is a perspective of my device in operative position,

Figure 2, a side elevation with parts broken away, and

Figure 3, a fragment illustrating Its use in connection with the nut on a spark plug,

1 this figure being taken on line 3-3 of Figure 2.

In the drawings reference character indicates handle preferably of wood or other insulating material, which handle is here shown as cylindrical but which may be of any shape convenient for the purpose, which shape will usually approach a cylindrical form. At one end of the handle are a pair of longitudinal parallel apertures to receive a pair of wires 11 and 12. these apertures being intersected by radial openmgs 13 through which a tool may be inserted for bending or crimping the wires as indicated at 14 to prevent withdrawal of the wires and also to prevent rotation of the wires relative to the handle whereby the spark-gap here inafter described would be changed.

The wires 11 and 12 are bent outward and twisted so as to form on one of them an eye or loop indicated at 15, the size of said-eye being such as to embrace the nut 16 of an ordinary spark plug. The other wire is also bent but at a slightly different angle from the first and has a loop or eye with its forward portion at 17 concaved to provide a convenient fit adjacent the base 18 of the spark plug. It is not essential that the wire 12 should engage the plug at any particular point except that one terminal of the tester engages above the porcelain and the other 1 below, i. e. at opposite sides of the spark-gap of the plug.

Each of the wires 11 and 12 has a limb 19 projecting from the twisted part toward the other wire and these approach each other so as to form a spark-gap, the distance between the points of which may readily be varied by bending the wires if this should be found necessary or desirable. The use of the device 7 so far described will be obvious from the drawings. ,The tester being positioned with the loop about nut 16 and the concave part of loop 17 in engagement with the lower part of the plug, a series of sparks will pass the spark-gap between the limbs 19 if the engine is running so as to indicate whether or not the plug is in operative condition.

Should the nut 16 need to be removed or replaced, this may readily be done by the use of a wrench 20 at the opposite end of the handle. This wrench has a stem 21 extending through an opening in the handle which is preferably at right angles to the axis of the openings 13 if the wrench projects sidewise, though I do not limit myself -to such location. At its upper end the stem 21 passes through a washer 22 and is riveted thereto or is held in place in any other convenient manner. The wrench itself consists of a frusto-conical shell adapted to fit about the nut 17 and move the jaw 23 toward the nut. This jaw is, or may be, a fragment of a hack saw blade secured to the conical part by soldering or inany other convenient manner. As here shown the front line of the jaw is parallel to the axis of the stem 21 with the teeth pointing toward the nut, but a cylindrical shell with a jaw at an incline to its axis is within the contemplation of my invention. The advantage of this construction lies in the fact that it is impossible to turn th nut with such force as to twist the stem 24 (Fig. 1 and so injure the spark plug, since the teethof the hacksaW blade (or the jaw of the wrench) will slip over the roughened part of the nut if too much force is used and this renders it impossible to twist the stem 24 which is a common cause of injury to spark plugs. In removing the nut there is usually no danger of twisting the stem but the teeth will grip the roughened part of the nut force to loosen it.

It will be obvious to those skilled in the art that various changes may be made in with suflicient my device without departing from the spirit thereof and therefore I do not limit myself to What is shown in the drawings and described in the specification but only as indicated in the appended claims.

Having thus fully described my said invention, What I claim as new and desire to secure by Letter Patent, is:

1. A spark plug tester comprising a ha1iv dle, a wire bent rearwardly upon itself and ing a crimped portion for preventing removal or rotation of the wire relative to the handle, a second Wire bent rearwardly upon itself and twisted with an arcuate extremity V for engagement with the lower portion of the plug said wire being secured in said handle similar to the first mentioned Wire,

the free ends of each of said Wires being disposed in slightly spaced relation to form a spark gap substantially as set forth.

2. A spark plug tester comprising a handle, ametallic body having a portion designed to fitover the nut at the top of the V plug, one end of said body being disposed Within the handle and having a portion for preventing removal or rotation of the same relative to thehandle, asecond metallic body having an arcuate extremity designed for engagement with the lower portion of the plug said body being also secured in said handle, the freeends of each of said bodies being disposed in slightly spaced relation to form a spark gap, substantially as set forth. r

In witness whereof, I have hereunto set-m hand at Washington, District of Columbia, this.21st day of January, A. D. nineteen hundred and twentyiive.

WVILLIAM F. LOEFFLER.

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