US1551224A - Magneto contact - Google Patents

Description

Aug. 25, 1925 1,551,224

W. B. STOCKMAN MAGNETO CONTACT iled Oct. 21, 1922 mum-- V 1 3 man 1' oz Patented Aug. 1925.

UNITED STATES PATENT OFFICE.

IVATSON B. STOCKMAN, OF CHESTER, PENNSYLVANIA, ASSIGNOR OF ONE-HALF '10 BENJAMIN SAMUEL MORTON, OF CHESTER, PENNSYLVANIA.

MAGNETO CONTACT.

Application filed October 21, 1922. Serial No. 596,013.

To all whom it may concern:

Be it known that I, VVATsoN B. STOCK- MAN, citizen of the United States, residing at Chester, in the county of Delaware and State of Pennsylvania, have invented certain new and .useful Improvements in Magneto Contacts, of which the following is a specification.

This invention relates to an improved magneto contact for Ford motors and seeks,

tion of the vehicle engine while, when found necessary, the post may be removed and cleaned individually.

A further object of the invention is to provide a device wherein the post will be double-ended so that in replacing the post no care need be exercised regarding which end of the post is inserted in the shell of the contact, the double-ended feature of the post also tending, of course, to prolong the usefulness of the post.

And the invention has as a still further object to provide a device which will be particularly simple in its construction and may accordingly be produced at moderate cost and which may be applied to the engines of Ford motor vehicles without the necessity for any change therein.-

Other and incidental objects will appear hereinafter.

In the drawings:

Figure 1 is an elevation showing my improvide magneto contact applied,

Figure 2 is a vertical sectional view through the device, V

Figure 3 is a transverse sectional View on the line 3-3 of Figure 1, looking in the direction of the arrows,

Figure 4 is a detail perspective view showing the retaining cap for the contact post of the device,

.per end of the ,post;

Figure 5 is a detail perspective view showing a slightly modified form of cap,

Figure 6 is a detail sectional view show ing a further modified form of cap, and

Figure 7 is a fragmentary elevation showing a modified structure.

In carrying the invention into effect, I

employ a base member or bushing 10 of suitable insulating material. This base member is, as shown in Figure 1, adapted to fit through the usual magneto contact opening in the transmission case of a Ford engine, the transmission case being conventionally illustrated at 11, and is provided with an annular flange 12 apertured to receive the usual cap screws detachably securing the device in position. The usual magneto terminal of the engine is indicated at 13. Fixed upon the base member is a shell 14 having a reduced lower end portion 15 tightly fitting in the base member and defining an internal annular shoulder 16 within the shell. Formed in the shell at one side thereof is a longitudinally directed slot I 17 while near its upper endthe shell is provided with bayonet'slots 18. Removably fitting through the shell to engage the terminal 13 of the magneto is a contact post 19 provided at a point substantially midway between its ends with an annular shoulder 20 to engage the shoulder 16 of the shell. As best brought out in Figure 2, the post is double-ended, being provided at each end with a substantially hemi-spherical cavity 21 from the bottom .of which leads a bore 22 extending axially of the post and intersecting said bore is a transverse opening 23 through the post. Opening through the wall of the cavity at opposite sides thereof are diametrically disposed notches 24. As shown in Figure 3, the slot 17 of the shell is of a width to freely receive the usual connector 25 at theadjacent end of the custom- .ary magneto lead wire 26 so that said connector may be freely slipped over the upper end of the post to rest against the shoulder 20 thereof and surrounding thepost to bear against said connector is a spring 27. Detachably engaged with the upper end of the shell is a flanged cap or collar 28 freely received within the shell to surround the up- As shown in detail in Figure 4, this cap is provided with studs 29 to engage in the bayonet slots 18 of the shell connecting the cap with the shell to engage the upper end of the spring 27 compressing the spring. Thus, the spring will not only serve to hold the connector in binding contact with the shoulder 20 but will also serve to hold the post 19 in binding contact with the terminal 13 of the magneto.

Attention is now directed to the fact that the cavities 21 define knife edges at the ends of the contact post so that by inserting a suitable pin in that one of the openings 23 exposed at the upper end of the post, the post may be oscillated for turning the knife edge at the lower end of the post against the terminal 13 of the magneto. Accordingly, any lint or other foreign matter collected about the lower end of the post may be readily cut through to provide a clean metal contact between the post and said terminal. Any foreign substance entering the cavity of the post at the terminal 13 will tend to discharge from said cavity through the notches 24L of the cavity or may rise through the bore- 22 leading upwardly from the cavity, to discharge through the adjacent opening 23 at the lower end of the post. Ac cordingly, as will be seen, provision is made whereby efficient electrical contact between the post and terminal of the magneto may be easily maintained without the necessity for removing the contact post. However, should this be found necessary, the post may be readily displaced by detaching the collar 28, when the post may be lifted through the shell 14: and cleaned individually. This feature of the device also provides a convenient means whereby the unauthorized use of a vehicle equipped with the device may be easily prevented since, upon leaving the vehicle, the contact post may be removed for rendering the magneto of the vehicle inoperative and since the post is doubleended, no care need be exercised, in replacing the post, as to which end thereof is first inserted through the shell. Furthermore, by making the post double-ended, the post may be reversed end for end should the knife edge at either end thereof become dulled.

In Figure 5 of the drawings, I have illustrated a slightly modified form of cap wherein the cap, indicated at 30, is spun and is provided with oppositely disposed studs 31 struck from the wall of the cap.

In Figure (3, I have illustrated a further modified form of cap, indicated at 32. In this modification, the cap is formed to surround the shell 14: and is provided with instruck studs 33 to engage in the bayonet slots 18 of the shell while at its upper end said cap is provided with an apertnred end wall to receive the contact post therethrough cooperating with the spring surrounding said post.

In Figure 7, I have illustrated a slight modification of the invention wherein the shell of the device, indicated at 3%, is elon gated to upstand through the floor boards of the vehicle, the floor boards being conventionally illustrated at 35. In such instance, the contact post of the device, indi cated at 36, is, of course, elongated to project at the upper end of the shell so that the post may be removed from the shell without the necessity for displacing the floor boards. Otherwise, this modification is identical with the preferred construction and further description is accordingly believed unnecessary.

Having thus described the invention, what is claimed as new is:

1. A magneto contact including a base member, and a double-ended contact post reversible end for end upon the base member.

2. A magneto contact including a base member, and a double-ended contact post reversible end for end upon the base member and provided at one end with an annular knife edge.

3. A magneto contact including a base member, a contact post carried thereby, and yieldable means for pressing the post into engagement with a magneto terminal, and holding a circuit wire connector in binding contact with the post.

4:. A magneto contact including a base member having a shell thereon, a contact post extending through the shell and adapted to receive a circuit wire connector thereover, and yieldable means operatively coacting between the post and shell bearing against said connector for holding the connector in binding contact with the post and pressing the post into engagement with a magneto terminal.

5. A magneto contact including a base member having a shell thereon provided with a slot, a contact post extending through the shell and provided with a shoulder, said slot being adapted to accommodate a circuit wire connector extending into the shell to overlie said shoulder, and yieldable means operatively coacting between the shell and post pressing the connector into binding contact with the shoulder and holding the post in engagement with a magneto terminal.

6. In a magneto contact, a contact post provided at its lower end with a cavity having a discharge passage leading upwardly therefrom to open through the side face of the post. p

7. In a magneto contact, a contact post provided at its lower end with a cavity, the post being formed with a bore leading up wardly from said cavity and being further formed with an opening leading from said bore through the side face of the post.

8. In a magneto contact, a contact post provided at its lower end with a cavity defining a knife edge at the adjacent terminal of the post, the post being provided with a discharge notch leading from said cavity.

9. A magneto contact including a shell, and a contact post rotatably fitting through said shell to project at'the ends thereof and loose with respect to the shell whereby said post may be freely turned.

10. A magneto contact including a shell, a contact post rotatably fitting through said shell to project at the ends thereof and loose with respect to the shell whereby sald post may be freely turned and yieldable means operatively coacting between the shell and post for pressing the post in a direction inwardly through the shell.

WVATSON B. STOCKMAN. [1,. s]

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