US1962728A - Magneto - Google Patents

Description

Patented June 12, 1934 PATENT OFFICE UNITED STATES MAGNETO Wilhelm Walther, Stuttgart,

, G rm nor to Robert Beach Aktiengeaellschaft, Stuttgart,

Germany 8 Claims. (Cl. 123-149) The present invention relates to magnetos. I In known constructions, the current of the high tension coil is conducted to the distributor by a contact pin inserted in an insulated man- .5 ner in the shaft of the rotary distributing piece, one end of which pin is seated on a contact piece provided on the high tension winding. This ar-' rangement has the drawback that the contact "piece and-the contact pin become worn by friction .10 on each other. The distance between the contact pin and the bearing of the rotary distributing piece must also be made so large that a sufliciently large creeping path for lubricant is provided along the shaft of the distributing piece whereby the 5, magneto is of long construction. Furthermore,

the rotating distributing piece is expensive because a the Contact pin in the distributor shaft must be insulated for a voltage up to about 20,000 volts.

According to the present invention, these draw- An example of construction of the inventionis shown in the accompanying drawing, in which:

Figure 1 is a longitudinal section through a I magneto. t

Figure 2 a section of the cover on the line A-A or Figure 1.

The magneto a illustrated has a rotating magnet, which is not shown, and a fixed winding b,

which is arranged in the usual way above the",

magnet. In the front wall 0 of the magneto casing is mounted the distributor piece a driven by means of the toothed wheel d from the rotating magnet. 0n the side of the wall c facing the winding is mounted the supporting. plate I for the interrupter arrangement, which is notfurther illustrated, the cam a of which is secured on the free shaft end of the distributor piece. The stationary distributor piece In. is mounted on the other side of the wall 0. I A protective cap i is placed above the armature winding b and the distributor disc h, which cap is seated on the casing in of the magneto and a collar or flange l of the stationary distributor piece h. A current conductor m is built in the bottom of the protective cap. It consists ofan insulation piece 1: and a metallic conductor ov which is embedded in the pressing of the material of the insulation piece 1:. The end 11 of the conductor on the winding side projects from the insulation piece 11 and bears on a springy contact q which is connected with the free end of the high tension coil. The end 1- of the conductor at the .tributor element, a stationary distributor eledistributor side is situated opposite a brush s of the distributor disc and contacts with a springy contact t of the brush from which the current is supplied in the usual way by a brush to the rotary distributor piece. The current conductor is secured in the protective cap 1 between projections u by means of a metal-band v. The insulationpiece n has lugs w projecting beyond the ends of the conductor 0 which afford the necessary creeping path from the conductor to the protective cap.

I declare'that what I claim is:

1. A magneto comprising a casing, a stationary armature mounted in said casing, a rotary disment,'a cover for said casing enclosing said stationary armature and said stationary distributor element, said cover being structurally independent of said last-named element and removable therefrom, and a current conductor mounted in said cover and connecting said stationary armature with said stationary distributor element.

2. A magneto comprising a casing, a stationary armature mounted in said casing, a rotary distributor element, a stationary distributor element, a cover for said casing enclosing said stationary'armature and said stationary distributor element, said cover being structurally independent of said last-named element and removable therefrom, an insulating member structurally independent of but removably secured to said cover and a current conductor embedded in said insulating member connecting said stationary armature with said stationary distributor element.

3. A magneto comprising a casing, a stationary armature mounted in said casing, a rotary distributor element, a stationary distributor element, a cover for said casing enclosing said stationary armature and said stationary distributor element, said cover being structurally independent of said last-named element and removable therefrom, a spring contact connected to the winding on said armature, a spring contact on said stationary distributor element and a current conductor mounted in said cover to automatically engage said spring contacts upon placing said cover in position and bodily removed from said spring contacts by removal of said cover.

4. A magneto comprising a casing, astationary armature mounted in said casing, a rotary distributor element, a stationary distributor element, a cover for said casing enclosing said stationary armature and said stationary distributor element, said cover being structurally independent of said last-named element and removable therefrom, an no utor element.

5. A magneto comprising a casing, a stationary armature mounted in said casing, a rotary distributor element, a stationary distributor element, a cover for said casing enclosing said stationary armature and said stationary distributor element, said cover being structurally independent of said last-named element and removable therefrom, a substantially rigid elongated insulating member and removable means securing said insulating member to said cover along its entire length, said insulating member conforming to the shape of said cover and said securing means permitting removal of said insulating member from said cover without endwise movement of said member, and a current conductor embedded in said insulating member connecting said stationary armature with said stationary distributor element.

6. A magneto comprising a casing, a stationary armature, a rotary distributor disc, a stationary distributor disc, a spring contact insulatedly mounted on said stationary armature and connected to the winding thereon, a spring-urged contact brush on said stationary distributor disc, a second spring-urged contact at the centre of said stationary distributor disc contacting with said rotary distributor disc and connected with said spring-urged contact brush, a cover for said casing structurally independent of said stationary distributor disc and removable therefrom and a current conductor insulatedly secured in said cover and automatically contacting its ends with said spring contact and said spring-urged contact brush when said cover is placed in position on said casing.

7. A magneto comprising a casing having an open top, a stator winding in said casing and a spring contact connected thereto and exposed on one side of said winding, a rotary distributor disc and a stationary distributor disc in said casing, a spring contact on said stationary distributor disc, both of said spring contacts being exposed through the open top of said casing, a removable cover fitting the open top of said casing and a conductor mounted in said cover and having terminal end portions automatically engaging against said spring contacts when said cover is placed in position on said casing.

8. A magneto comprising a casing having an open top, a stationary armature mounted in said casing, a rotary distributor element and a stationary distributor element in said casing, a removable cover for said casing, a substantially rigid elongated insulating member and means removably securing said insulating member to the under side of said cover along the entire length of said member, saidsecuring means enabling said member to be secured to and removed from said cover without endwise movement of said member relative to the cover, and a current conductor embedded in said insulating member and connecting said stationary armature with said stationary distributor element when said cover is in position.

WILHELM WALTHER.

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