US1599190A - Ignition timer - Google Patents

Description

1,599,190 G. VAHRENHOLD IGNiTION TIMER Filed August 24. 1923 9 15VENTOR BY 5% ATTORNEY Patented Sept. 7, 1926.

UNITED STATES PATENT OFFICE.

GEORGE C. VAEBENHOLD, OF ST. LOUIS,

MISSOURI, ASSIGNOR TO WAGNER ELEC- TRIO CORPORATION, 01 ST. LOUIS. MISSOURI, A CORPORATION OF DELAV ARE.

IGNITION TIMER.

Application flled August 24, 1923.

My invention relates to ignition timer mechanism of the type in which the timing is adjusted by rotation of the timer mounting in its supporting base. It is usual in such apparatus to have one of the breaker contacts grounded to the automobile frame the connection being through the mounting and its support and forming a part of the primary ignition circuit. The presence of oil in the bearing between the mounting and base frequently interferes with electric connection between these parts and it has been the practice to employ pig-tail connectors between the timer mounting and the base.

The principal object of my invention is to provide a construction by means of which pig-tail connections can be dispensed with and one which embodies conveniently releasable means for retaining the timer mounting in position in its supporting base.

In the accompanying drawing which illustrates an embodiment of my invention timer base 1 is attached to some part of the automobile, such for instance, as the generator end plate, and in this base the timer mounting sleeve 2 extends and is rotatable with respect thereto by means of the arm 3. The sleeve 2 constitutes an extension of the timer mounting 4 which carries the breakerarm and contacts, which arm is actuated by a cam on the engine driven shaft 5. This shaft 5 also carries the distributor arm cooperating with the contacts on the distribu tor head 6. The breaker and distributor devices referred to form no part of my invent-ion and being well known are not illustrated in detail.

In mechanism involving my invention as illustrated, the actuation of the arm 3 r0 tates all parts of the timer-distributor except such as are carried on the engine dr1ven shaft 5, and since the breaker actuating cam is on this shaft rotation of the timer mounting 4, which carries the breaker-arm, changes the time of occurrence of ignition sparks with respect to engine piston position.

To secure the objects of my invention I provide the timer mounting sleeve 2 with a. circumferential groove 7, and in an opening in the wall of the base 1, I insert a retainer assembly comprising the threaded housing 8 carrying a plunger 9, which plunger is adapted to be held in the groove 7 by the compression spring 10 and thereeria) No. 659,203.

fore serves to retain the mounting sleeve in position in the base. Since the parts mentioned are of conductive material the plunger also acts as a ground brush electrically connecting the base to the mounting sleeve and thus makes it unnecessary to attach pigtail connectors between the base and the mounting at to secure the reliable electrical contact between these members, which is necessary when the common practice of employing them as a part of the primary circuit of the ignition coil is followed.

A finger piece 11 attached to the plung er and the plunger may thereby be readily retracted to permit withdrawal of the timer from the base.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In ignition timer mechanism, the com bination of a grounded support, a timer mounting member rotatably carried thereby and forming part of the primary ignition circuit, a rotating shaft for actuating the timer, means for rotating the timer mounting in the support, and retainer mech anism adapted to hold the timer mounting in position on the support while permitting its rotation, said mechanism coniprising means adapted to maintain electrical connection between the support and the timer mounting member in all of the operative positions of the latter.

2. In ignition timer mechanism, the combination of a grounded support, a timer mounting rotatably carried thereby and forming part of the primary ignition circuit, said timer mounting member comprising a portion bearing on the top of the support and a sleeve portion. extending into the support and provided with a circumferential shoulder, means for rotating the timer mounting relative to the support, and a spring pressed member mounted on the support and bearing on said sleeve, said lastnamed member being adapted to maintain electrical connection between the support and sleeve in all of the operative positions of said sleeve and to form a stop cooperating with the shoulder to retain the sleeve in the support.

In witness whereof, I have hereunto set my hand and allixed my seal.

GEORGE C. VAHRENHOLD. [L.S.]

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