US1573316A - Magneto plug - Google Patents

Description

E. L. HADDOCK MAGNET@ PLUG Feb. 16 1926. 1,573,316'

Filed Sept. 13.' 1923 Patented Feb. 16, 1926.

UNITED STATES ERNEST L.' HADDOCK, 0F VANCOUVER, BRITISH COLUMBA, CANADA.

MAGNETO PLUG.

Application filed September 13, 1923.

To all whom if 'may concern:

Be itknown that 1, ERNEST L. Hannoon, a. subject of the King of Great Britain, residing at Vancouver, in the Province of British Columbia and Dominion of Canada, have invented certain new and usefulimproven'ients in a lvfagneto Plug, of which the following is a specification.

This invention appartains to a terminal` plug for magnetos.

1n a. well known type of automobile, the terminal plug of the magneto becomes quickly fouled and short eircuited and thus renders the complete ignition system out of working` order. Further the plug is so situ ated and so arranged in the magneto housing, that the same is not easily removed, and when the same is repeatedly removed the connection between the plug and the magneto housing becomes worn and leaky.

1t is therefore a prime object of this invention to provide an improved magneto terminal plug, which is so constructed, that the -same will not be easily fouled or short ci reuited and which is so associated with the magneto easing, that the plug can be quickly removed when necessary without injuring the connection between the plug and the housing.

A still further object of the inveutifni is to provide an improved magneto ter iinal plug of the above character, which will be durable and etlicient in use, one that will be simple and easy to manufacture and one which can be placed upon the market at a small cost.

Vith these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specilically described, claimed and illustrated in the accompanying drawins, in which drawings:

FigureV 1 is a side elevation of the improved magneto contact or terminal plug'.

Figure 2 is a vertical longitudinal section through the same.

Figure 3 is a horizontal. section through the plug taken on the line 8-3 of Figure Q.

Figure 4 is a horizontal section taken through the plug, on the line 4-si of Figure Q.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter generally indifates the improved vterminal plug, which Serial No. 662,517.

comprises a jacket 5, preferably formed of steel, iron or the like. reduced at its lower end and provided with external screw threads G for permitting the same to be threaded into a screw threaded opening 7 formed in an attaching plate S. This attaching plate 8 is adapted to be connected to the magneto casing` of the automobile with which the plug` is associated by suitable screws or the like 9 and it' so desired a gasket can be placed between the plate 8 and the magneto casing (not shown), so as to make a tight lit therewith. The upper end of the jacket 5 has its outer surface formed of a polygonal configuration. so as to permit. the ready engaging` thereof by a wrench or the like. .At a point intermediate its ends the jacket 5 provided with au internal shoulder 10, for a purpose, which will be hereinafter more fully deseril'ied. hs clearly shown in Figure 2 of the drawing the jacket 5 is adapt-ed to receive the porcelain or other insulation body 11 and the same is enlarged at a point intermediate its ends to provide upper 'and ilower shoulders, and it can be seen that the lov-,fer shoulder formed by the enlargement 1&2 rests upon the shoulder 10 formed in the jacket The porcelain body 11 held in place in the jacket 5 by means of a suitable nut or the like 13. rThis nut 13 engages the upper shouider formed by the enlargement 12 on the porcelain and if so desired suitable gaskets can be placed on the upper and lower shoulders defined by the enlargement, so as to prevent injury to the porcelain incident to screwing of the nut 13 into place. A contact rod` 15 extends axially through thel porcelain body 11 and terminates below the jacket 5 and the porcelain body 11, as is clearly shown in Figure 2 of the drawings. The upper end of the contact rod 15 terminates in a binding post 1G and a suitable bindingnut 17 can be provided for holding the magneto terminal wire in place. As clearly shown in Figure 2 of the drawings the. ripper end of the contact post or rod 15 is limited in its downward movement by suitable nuts and washers 18 which are threaded on the post in contact with the porcelain body 11. The magneto terminal vire is clamped between the nuts 1T and 18 and these nuts can be adjusted so as to regulate the position of the contactrod 15 in the porcelain body 11. The lower surface of the porcelain body 1.1 is provided with an This jacket 5 is' by the nuts 18, as heretobefore stated.

enlarged chamber 19 for the reception of an expansion spring 20, which is coiled about the contact rod 15. The upper end of this spring 2O engages the upper end of the chamber, while the lower end of the spring` engages a collar 2l formed on the contact rod. This spring` serves as means for normally holding the Contact post down in the plug and the downward movement is limited The extreme lower end of the rod is provided with a. substantial conical-shaped contact point 22.

A sliding' porcelain protector body 23 receives the lower end of the Contact rod l5 and this body 23 is of a sleeve like config;- uration and has the upper end of the bore thereof enlarged in diameter so to permit the same to be snugly fitted between the jacket 5 and the lower end of the porcelain body ll. As shown an expansion spring 2lis coiled about the lower end of the porcelain body ll and engages :nshoulder formed in the jacket y5 at one end and the upper end oi'4 a porcelain prot ctor sleeve 23 at 'its lower end. This spring serves as means for normally holding; the porcelain body at the lower end of thecontact plug and it can be seen that the lower end of the protector porcelain body is flared as at 25 for receivingr the contact peint lt .is obvious that the protector insulating sleeve 23 will effectively prevent the adhering` of foreign objects to the Contact point 22 and thus prevent short circuiting of the plug. It is also obvious that when it is desired to removev the plug for the replacement of broken parts or for the cleaning` thereof, the same can be readily and quickly unt-hreaded from the attachingplate, without disturbing any other parts of the magneto casing or the like.

Changes in details may be made without departing' from the spirit or the scope of this invention.

That I claim as new is:

A terminal plug for magnetos comprising;r a metal jacket having an annular enlargement therein defining an upper and a lower stop shoulder, a porcelain body fitted in the jacket resting on the shoulder, the lower end of the porcelain body beingreduced and extended below the annular enlargement in spaced relation to the inner face of the jacket defining an annular chamber therewith, a nut for holding,` the porcelain body in position in the jacket on said shoulder, an axially disposed contact' rod extending through the porcelain body and terminating below the lower end thereof, a binding` post on the upper end of the rod, a contact point on the lower end of the rod,

inea-ns carried by the upper end of the rod for holding the same in position on the porcelain body and for limiting` the slidingr iovement thereof, a stop collar on said rod, an expansion spring` coiled about the rod engaging the collar at its lower end and` the porcelain body at its upper end, a porcelain sleeve having` a reduced extension slidably disposed in the chamber deiined by the jacket and the reduced portion of the porcelain body the reduced portion of the sleeve dei'ining,` a stop shoulder, the sleeve receiving,r the lower end of the Contact rod and an expansion spring disposed in the cl'iamber having its opposite ends engaging the upper edge of the sleeve and the stop shoulder delined by the annular, enlargement of the jacket.

In testimony whereof I ath); my signature.

ERNEST L. HADD-OCK.

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