Ignition distributor-circuit breaker assembly for internal combustion engines
AssigneeRobert Bosch GmbH
InventorsKarl Ehrmann, Richard Gerber, Klaus Doderer
Life of this patent
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Abstract
To provide for fine adjustment of the timing of operation of the ignition breaker switches, the breaker plate is connected by an adjustable link to a vacuum ignition control diaphragm, the link being a two-element unit, one element having a right-hand thread at the end and the other a left-hand thread, coupled by a coupling element rotatable in both said right and left-hand threads to shorten or lengthen the overall length of the link. The coupling element is externally accessible, for example by means of an additional transmission wheel or gear.
Claims8
Ignition distributor and circuit breaker assembly for internal combustion engines having a housing (10);
- a slit (28) formed in the housing;
- a breaker support plate (12) mounted in the housing for limited rotation therein to support a breaker assembly;
- and means (15) controlling the position of the support plate (12) in the housing including a link means (16, 17, 18, 19, 20) the length of which is adjustable, connecting said position control means (15) to the plate (12), wherein
- said link means comprises a first end element (16, 17) having a left-hand thread, and a second end element (18, 19) having a right-hand thread, and a rotatable coupling sleeve (20, 20') having left hand threads and right-hand threads at opposite end portions in threaded engagement with the respective end elements and formed, externally, with cylindrical shape and a serrated or gear-shaped outer surface
- a rotation-transmitting disk-shaped element (25) penetrating in part through said slit (28) in the housing and accessible externally from said housing said disk being formed with a serrated, gear-shaped circumference and located for coupling engagement with respect to said rotatable sleeve (20) to permit rotation of said sleeve and thereby adjust the effective length of said link means and hence the position of said plate (12) in the housing with respect to said position control means (15);
- a central shaft (26) extending from both sides of said disk-shaped element;
- a pair of spring clips located in said housing, shaped to engage at least in part around said central shaft (26), the spring clips securing said disk shaped element member in axially fixed, but laterally movable position within said housing;
- said slit being of lesser size than the diameter of the disk-shaped element, the spring clips locating said rotation transmitting member in position out of engagement with the sleeve and closing off said slit (28) but permitting inward movement of said disk shaped element and engagement with the serrated or gear-shaped circumference of said sleeve.
Dependencies are inferred from the claim text.