US1889878A - Ignition dynamo - Google Patents

Description

F. REIS IGNIT ION DYNAMO Dec. 6, 1931"?s Filed April ll, 1929 2 SheetS-Shee Shy NN 0a@ r W95/ks',

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attenta@ Dec. 6, 1932. c. F. REIS 1,889,878

IGNITION DYNAMO Fild April 11, 1929 2 sheets-sheet 2 Patented Dec. 6, 1932 UNITED STATES PATENT OFFICE CURT FREDERICK REIS, OF CHICAGO, ILLINOIS, ASSIGNOR 10 EXCEL MAGNETO COMPANY, F CHICAGO, ILLINOIS IGNITION Application led April 11,

This invention relates to an ignition dynamo or magneto.

An object of the invention is to devise a magneto of simplified structure wherein the parts may be easily assembled and dismantled.

A further object of the invention is to devise an ignition magneto in which the high tension circuits are associated on a common insulating member which may be readily removed for inspection and repairs, and wherein allnecessary connections are automatically completed upon placing the member in position.

Still another object is to devise a magneto structure in which the interrupter mechanism is formed as a unitary structure readily removable from the magneto casing, and wherein the electrical connections thereto are completed by the simple act of placing the unitary structure in proper position.

My invention is illustrated in the accompanying drawings in which:

Figure l is a sectional. view of my improved magneto taken in a vertical plane passing through the axis of the rotor element;

FigureV 2 is an end view of my magneto with parts broken away to show the internal construction Figure 3 shows the manner in which the rotary distributor element is mounted upon its supporting spindle; and

Figure il; is a perspective view of the insulating block on which the high tension circuits are arranged.

Referring to Figure 1, A is the magneto casing which is preferably av casting of any suitable metal. The casing A is provided with a cylindrical recess near the bottom for receiving the rotor element B, the left end of which is liournaled in a wall of the casing by suitable ball-bearings. The rotor recess is open at the right end, and an end-plate C is provided for the right end of the casing A. The right end of the rotor shaft is journaled in a ball-bearing supported by end-plate DYNAMO 1929. Serial No. 354,343.

C. The rotor is of the permanent magnet type, with the pole faces located at the left end of the rotor. The magnetic circuit for the rotor is completed by a pair of upright magnetic members D extending upwardly into an elongated recess located in the upper part of casing A. The magnetic members are joined together at the upper end by a core member E around which is wound the customary primary and secondary windings en-A closed in a casing W. A distributor gear F is mounted in a shallow recess formed in t-he right end of casing A immediately above the right end of rotor B. The rotor carries the driving gear G engaging and driving the distributor gear F. The gear F is secured to a hollow spindle H journaled in a bushing J which is suitably secured in casing A by screw K. On the inner end of spindle H, and within the upper recess, is secured a rotary distributor element L, which comprises a disc made of insulating material and provided with a bearing cone L which is secured to spindle H by means of a screw M. The upper recess of casing A containing winding casing W and rotary member L, is provided with a cover N comprising a block of molded insulating material having an extension N interposed between the inductor windings W and the rotary distributor element L. EX- tension N is provided with a conducting member P serving to establish electric connection between a spring element iV connected to the free end of the secondary winding (not shown) and a rotary contact arm Lc cooperates with a number of stationary distributor contacts L1, L2, L3, L4, L5 and L6, respectively, mounted on the extension N (see Figure 4). These stationary contacts are connected respectively to ignition wires 1, 2, 3, 4i, 5 and 6 leading to the engine spa-rk plugs. The rotary member L is also provided with a booster ring BR which is connected to a contact BR mounted on the face of member L approximately from the rotary contact Le. This ring cooperates with a lead 7 for booster operation when desired. As shown in Figure 3, spindle I-I is provided with a pin H for properly positioning rotary member L upon the spindle.

rThe construction of insulating cover N is such that the various electric connections between the inductor windings and the rotary distributor, and between the rotary distributor and the ignition leads, are automatically completed by the simple operation of placing the cover in position.

End-plate C is provided with a circular recess C concentric with the rotor shaft. Within this recess is mounted an interrupter mechanism comprising a circular frame member 8 provided with a central opening 8c for the reception of the end of the rotor shaft. A spring washer 8b is interposed between the frame 8 and the bottom of the recess surrounding the end of the rotor shaft. rEhe frame 8 has sliding engagement with the circular recess, and is held in the recess by a screw 8c, secured to the frame 8 and the head of which engages a bayonet slot 9 formed in the bottom wall of the recess C (see Fig. 2). Spring member 8b serves to prevent vibration of the 'frame member. A U-shapcd contact arm 10 is pivoted at 10a to the frame 8 and carries at one end a movable interrupter contact 10?). At the other end there is provided a fiber insert 100 for engagement with a cam 11 carried on the end of the rotor shaft. Secured to frame 8 near its periphery is an insulated metallic sector 12 provided with a stationary interrupter contact 12a cooperating with movable contact 10?). A spring element 10d is provided to bias the movable contact 10b against the stationary contact 12a.'

It will be understood that cam 11 operates to periodically open the interrupter contact by engagement with the liber insert 10c carried in one end of contact arm 10.

The electric connection between the pri mary inductor winding .and the stationary interrupter contact, is completed as follows:

It will be understood that one `end of the primary winding is grounded in the usual manner. The other end is brought out to a terminal 13, and from there a conductor 18a leads to an insulated spring-pressed plunger 14 mounted in the right end of the casing A, 1

and arranged to engage an insulated Contact block 15 carried by end-plate C. Contact block 15 is provided with a contact arm 15a (see Fig. 2) the free end of which passes through an opening in the side wall of the circular recess containing the interrupter and engages the insulated sector member 12 carrying the stationary interrupter contact.

The movable interrupter Contact is, of course,

grounded to the rotor and to the frame C; thus a circuit is completed through the primary winding and the interrupter contacts.

A condenser 16 is carried in end-plate C justextend of slot 17 a.

above contact block 15. One terminal of this condenser is grounded to end-plate C, and the other terminal is connected to terminal block 15 by a connection 16a; thus the condenser is effectively connected in shunt to the interrupter contact.

End-plate C is provided with a cover 17 for the recess containing the interrupter mechanism. The outer periphery of cover 17 is provided with a slot 17 a into which eX- tends a pin 18 secured in end-plate C. The frame 8 of the interrupter mechanism is provided with a pin 19 which extends into a seat formed in the cover 17 and locks the interrupter frame to the cover. The cover`17 is providedr with a handle 17h (shown in dotted lines in Fig. 2) whereby the cover, and therefore, the interrupter mechanism, may be rotated through an angle determined by the In this way, the operation of the interrupter contacts maybe advanced or retarde It will be observed that the interrupter mechanism is made in unitary structure which may be inserted and removed from the recess formed in end-plate C simply by a bayonet slot connection, and the necessary electric connections are automatically made upon insertion of the mechanism.

It will also be noted, that end-plate C with the apparatus mounted thereon is made in a unitary structure which is easily removed from the casing A, and all necessary electric connections are automatically made upon` placing the end-plate in its proper position.

From the foregoing description and the accompanying drawings it will be seen that I have devised a simplified construction of magneto which may be readily assembled and dismantled, that the high tension circuits are associated on a common insulating member,

that all necessary connections are automatically completed upon placing tlie insulating member in position, and that the interrupter.

myself or the scope of the invention, as many. changes and modications may be made without departing from the spirit of the invention; all such I aim to include in the scope of the appended claims.

W hat I claim as new and desire to secure.

by Letters Patent is:

1. In an ignition dynamo, a casing provided with an elongated recess, a rotor journaled in said casing` adjacent said recess, an

inductor winding mounted in'said recess at.. one end, a distributor mechanism mounted in said recess at the other end, and a detachable member interposed between said winding and said distributor for effecting connections between said elements, said member embracing said winding ancforming a top closure for said recess.

2. In an ignition dynamo, a rotor having a shaft, a casing therefor having an elongated recess parallel to said rotor, an inductor vindiii g mounted in said recess adjacent one end of the rotor, a rotary distributor mechanism mounted in said recess adjacent the other end of the rotor, means for driving the distributor from the rotor shaft, a cover for said recess having an extension interposed between said winding and said rotary distributor element, stationary distributor contacts mounted on said extension and cooperating with the rotary member, and means carried by said extension for effecting electric connection between said winding and said rotary member.

8. In an ignition dynamo, a casing provided with a recess, an inductor winding mounted in said recess, a rotary distributor element mounted in said recess in spaced relation to said winding, a cover for said recess having an extension interposed between said winding and said rotary element, means carried by said extension for eifecting circuit connections between said winding and said rotarj,7 element, and stationary distributor contacts carried by said extension and cooperating with said rotary member.

4. In an ignition dynamo, a rotor having a shaft and a casing therefor, a detachable end plate for said casing, an interrupter mechanism carried in a recess in said end plate, means for operating said interrupter mechanism from the rotor shaft, and separable Contact elements mounted on said casing and said end plate respectively, the contact element on said casing being connected to an inductor winding and the contact element on said end plate being connected to an interruptor contact, whereby said electric connection is completed upon properly positioning said end plate.

5. In an ignition dynamo, a rotor having a shaft and a casing therefor, said casing having a circular recess formed adjacent one end of said rotor shaft, an interrupter mechanism supported within said recess upon a shiftable frame, a cam on the rotor shaft for operating the interrupter, said interrupter comprising a movable Contact element, and a stationary contact element carried by Said frame, and flexible contact member carried by the end plate of said casing and extending into said recess in engagement with said stationary contact element.

6. In an ignition dynamo, a rotor having a shaft and a casing therefor, said casing having a circular recess 'formed at one end 0f said rotor shaft, an interrupter mechanism supported within said recess upon a shiftable frame, a cam on the rotor shaft for operating the interrupter, said interruptor comprising a movable Contact element, and a stationary contact element carried by an insulated sector of said frame, and a flexible contact member carried by the end plate of said casing and extending into said recess in engagement with said insulated sector.

CURT FREDERICK REIS.

Cil

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