US 4,040,407 A · Internal combustion engine distributor-breaker unit holding and adjustment arrangement

Abstract

The housing of the breaker-distributor is formed with a shaft element inserted in a motor block, and with a flange thereon which is engaged by a claw surrounding the flange and gripping therearound, screwed to the motor to clamp the housing against the motor block. To permit minor adjustment for changes of relative position of the distributor and the motor block upon tightening of the clamping bolt, the attachment shaft is formed with adjustment means acting thereon to permit slight relative displacement of the shaft with respect to the motor block; these adjustment means may, for example, be a hexagonal engagement surface for connection to a wrench, preferably with tapering end faces so that upon rotary engagement of the wrench, simultaneously, a lifting force will be generated; or by forming the claw with threaded holes through which bolts are threaded, engaging the distributor housing eccentrically to exert pressure thereon and effect rotation about the shaft. Upon tightening of both bolts, the relative rotary position will be fixed.

Claims10

Dependent claims

Internal combustion engine distributor holding and adjusting arrangement, to secure a distributor (10) in adjusted position on the motor block (20) of the engine, having a housing (11), a shaft (12) for insertion in the motor block (20) of the engine, means (21, 23) secured to the motor block (20) and engaging the distributor (10) to clamp the distributor to the motor block (20) including a releasable bolt (26) to tighten the distributor into frictional engagement with the block;

and a unitary boss concentric with said shaft (12) and formed with essentially parallel engagement surfaces to permit engagement therewith by a wrench located below the bottom of the housing (11) of the distributor and forming a thickened portion of said shaft (12), the engagement surfaces tapering slightly in the direction of the bottom of the housing (11) so that, upon application of rotary force to said engagement surfaces, a lifting force component will result to permit slight relative rotary movement between the shaft, and hence the distributor, and the motor block after said clamping means have clamped the distributor against the motor block to permit fine adjustment of ignition timing of the engine.

Internal combustion engine distributor holding and adjusting arrangement, to secure a distributor (10) in adjusted position on the motor block (20) of the engine, having a housing (11), a shaft (12) for insertion in the motor block (20) of the engine, a fork-shaped claw (23, 43) with an opening between the fork ends (29) engaging around the shaft (12) of the distributor, the claw being secured to the motor block (20) and engaging the distributor (10) to clamp the distributor to the motor block (20) including a releasable bolt (26) to tighten the distributor into frictional engagement with the block;

and adjustment means (13, 35, 36, 47) acting on the shaft (12) of the distributor and permitting slight relative rotary movement between the shaft, and hence the distributor, and the motor block after said clamping means have clamped the distributor against the motor block to permit fine adjustment of ignition timing of the engine,
said adjustment means comprising a pair of screws (31, 31'), a pair of threaded means (30, 42) on the claw located, respectively, symmetrically with respect to the plane of rotation of the distributor shaft and the plane of symmetry of the end portions (29), the screws (31) being located in said end portions and engaging the distributor eccentrically with respect to the center of the shaft and symmetrically with respect to each side of said plane of symmetry to rotatably adjust the distributor upon rotation of one of the screws in the thread means, and to lock the distributor in adjusted position upon engagement of the other of said screws with the distributor.

Dependencies are inferred from the claim text.

Internal combustion engine distributor-breaker unit holding and adjustment arrangement

Life of this patent

Internal combustion engine distributor-breaker unit holding and adjustment arrangement

Life of this patent

Abstract

Claims10