US1352033A - Electrical connection for spark-plugs, &c. - Google Patents

Description

H. B. SHERMAN AND F. D. MALTBY, ELECTRICAL CONNECTION FOR SPARK PLUGS, 84c. APPLICATION man :mzz. 1919.

14352033 memease t. 7,19%

' narrsn HOWARD B. SHERMAN AND FRANK D. MALTBY, OF BATTLE MALTBY ASSIGNOR TO SAID SHERMA ELECTRICAL GGNNECTION FOR SPARK-PLUGS,

Application filed January 22, 1919.

To a whom. it may concern Be it known that we, l'lownnn l3. SHER- MAN and FRANK D. Miinrui', citizens; of the United States, residing at Battle Creek, in the county of Calhoun and State of Michigan, have invented certain .new and useful improvements in Electrical Connections for Spark-Plugs, &c.; and we hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

()ur invention relates to means for con- I by such methods.

Our invention enables good electrical connection to be made very quickly and easily, as hereinafter explained.

The objects of our invention are to enable the parts of such connectioi sto be readily applied to the conductor and spark plug or post; and to enable the conductor, or supply wire, to be readily connected with a spark plug, binding post, etc., without requiring any special tools or any special mechanical skill.

In the accompanying drawings we have illustrated one practical embodiment of the" invention andwill describe the same to enable others skilled in the art to adopt and use the invention; but we do not consider the invention restricted tov the particular -;construction shown, except as parts thereof may be specifically defined in some of the claims.

In the claims We have summarized the novel essentials and novel features of con 5Q..s truction and novel combinations of parts for'a1l of which protection is desired.

In said drawings:

Figure 1 is a view of a complete electrical connectlon between a conductor or supply Specification of Letters Patent.

Patented Sept. '7, 1920.. Serial No. 272,487.

such connection emprcsent preferred form of wire and a spark-plug; bodying the at the invention.

Fig. 2 is an the terminal connected to the supply wire.

Fig. 3 is an enlarged sectional view of the cap nut and spring connected with the spark plug.

Fig. l is a further enlarged top plan View of Fig. 1.

Fig. 5 is a bottom plan view of the electrical connection shown in Fig. at.

T he conductor or supply wire C may be of the usual kind; being shown as a copper wire or cable incased in an insulating covering. The conductor 0 is usually rovided with some kind of a terminal electrically connected with the conductor and adapted to facilitate engagement thereof with the stem of a spark plug, or binding post. The spark plug P may be of any suitablekind, and as shown has a threaded stem or binding post 3) upon which a nut is usually screwed to clamp the end or terminal of the conductor C thereto.

In our invention the insulating covering of the conductor 0 can be stripped off the end of the wire, and such bared end is then inserted into one end of a sleeve 1, preferably formed of insulating material. This sleeve (see Fig. 2) has an internal partition 1 provided with a small aperture for the passage of the bared end of the conductor,

CREEK, MICHIGAN; sA'In enlarged sectional view of which is usually made up of a plurality of fine wires, and the ends of the wires, projecting through the partition 1, are bent or turned against the face of the partition and pinched thereagainst by the shank2, of a novel terminal.

This terminal is preferably made of copper or other suitable conducto of electricity, and as shown in Fig. 1 has althreaded shank 2 and a tongue 2. The terminal shank 2 is screwed into the threaded end of the sleeve 1, opposite that end into which the conductor C is entered; and the *shank seats upon the ends of the conductor wires and not only makes an excellent electrical connection therewith but also unites the wires mechanically to the sleeve by the screw pressure exerted on the ends of the Wires against the partition 1 so the wires cannot be withdrawn from the sleeve:

'The tongue 2 of the terminal mav be en- 1 gaged with a preferabl preferably member attached to a'binding post, or spark plug shank, as hereinafter described.

In the shown in igs. 1 to 5, a cap 3, of brass or other suitable metal, is provided with an internally threaded recess 3 by which it can be readily engaged with the end of the binding post, or shank p of the as indicated in the drawings.- ThlS cap 3 v has a peripheral flange 3 on its upper end, the underside of which is engaged by the ends 4? of a spring retainer 4,

also preferably made of suitable conducting metal, which extends diametrically across the top of the cap and has its ends 4 bent under the flange 3 as shown; '(see Figs. 8 and 4). The-inner edges of the ends 4" of the spring are preferably concaved as shown in Fig. side of the cap 3, and these ends. 4* prevent the spring 4 being disengaged from the cap, while permitting'it to be turned .upon the ihe retainer 4 has a loop or bend 4*, ,at its center, which is adapted to be entered nal. Said tongue can be inserted into the loop 4 and forced. between the retainer 4 and cap3" (as shown in Figs. 1, 3 and 4) a and whenso insertedit is tightly clamped against the cap 3 by the retainer.

The retainer maintain the'cap 3 in place on the stem p by preventing, its rattling loose or'unscrewing. As the retainer 4 can swivel or turnaround on cap 3 it is possible to shift the retainer so that the tongue 2 can be readily engaged .in the loop 4 no matter at 'what point of rotation the cap'seats on the binding post or stem, or the spark plug seats in the engine cylinder. This preventsbreaking or bending of the conductor, as it can always be led straight to the retainer on the cap without bending or cramping the wires as in other devices.

In the construction shown the sleeve can ---belrnailily attached to the conductor; the

' .With these connections, a car owner,

he has spark plug trouble, does not have to take a pair of pliers and unscrew a nut to withdraw the terminal, but can simply} take hold of the sleeve 1, or the cable back referred form of construction,

spark plug,

5, so as to fit against the outer by the tongue 2 of'the termi 4 serves both to electrically unite the tongue 2 to the cap 3, and to also I of the sleeve'andjerk the terminal tongue out of the cap -He can then determine whether there is any spark action between the spark plug and the terminal by wiping the tongue against any part of-rthe'spark plug or post that would give electrical connection and show a spark if the parts were in proper condition; and can easily renew theconnection or make repairs thereof or 'substitute new parts, it necessary, without the use of special tools.

What we claim is: In an electrical connection of the char acter specified, a gap adapted to be engaged\ with a bindingpost or shank of an electricij device, and having a peripheral flange, at}

retainer s ring having its ends engaged withsaid ange to secure it on the cap, and

having a bent portion adapted to be en-' gaged with a conductor terminal.

2. In an electrical connection of thecharacter specified, a cap having an internally threaded socket, for engagement with the threaded binding post or shank of an electrical device; and a spring retainer extending across and attached to said cap and providedwith a bent portion forming an eye for engagement with the terminal of a conductor. 1 j

3. In an electrical connection of the type specified, a cap adapted to be attached to "a binding post and make electrical contact therewith; and a spring retainer plate extending across the upper end of the cap and having a central loop adapted to permit a terminal to be inserted between said plate and capand to bind the terminal to the cap when so inserted, substantially as described.

4. An electrical connection for spark plugs and the like, comprising aflanged cap adapted to be aflixed to a binding post and make electrical contact therewith; and a spring plate extending across the cap andv having its endsloosely engaged with the flange thereof and having a central bend to allow a terminal to be inserted between the plate and cap, a said spring-binding the 'terminal to the cap when so insertedp substantially as described.

. 5. In an electrical connection of the character specified; a cap having a peripheral flange and provided with an internally threaded socket for engagement with the threaded binding post or shank of an' elec'- trio device, a retainer spring on top of said cap having its ends bent over and loosely engaged with said flange to retain it on the cap, and provided withan eye to permit a conductor terminal to be inserted between the spring' and cap, substantially as described.

r In testimony that we claim the foregoing as our own, we aflix our si natures.

z HOWARD SHERMAN.

FRANK 'D. MALTBY.

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