Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1977-04-18
1980-01-08
Scott, Samuel
Machine element or mechanism
Control lever and linkage systems
Hand operated
744115, G05G 108
Patent
active
041821971
ABSTRACT:
The gear drive from the hand wheel to the chain drum includes a worm wheel coaxial with the chain drum. An idler shaft parallel to the plane of the worm wheel carries a worm engaging the worm wheel and a bevel gear. The hand wheel shaft is parallel to the chain drum shaft and carries a bevel gear engaging the bevel gear on the idler shaft. Between the worm wheel and the chain drum is a release mechanism which includes a release ring which when rotated about the axis of the chain drum is cammed to push a release plate into disengagement position. This release ring has a gear segment thereon which is engaged by a gear segment on a release actuating lever. In a modified embodiment this release lever also carries a cam which urges a brake shoe against a brake drum on the chain drum to apply a restraining force to the chain drum when the release mechanism is released. There is also described a similar type of brake for chain drum drag on a conventional hand brake mechanism which utilizes only spur gears rather than a worm gear drive.
REFERENCES:
patent: 1000084 (1911-08-01), Frederickson
patent: 1950618 (1934-03-01), Lounsbury
patent: 2082964 (1937-06-01), Lounsbury
patent: 2310135 (1943-02-01), Van Cleave
patent: 2457764 (1948-12-01), Williams
patent: 2618169 (1952-11-01), Mersereau
patent: 2639628 (1953-05-01), Olander
patent: 3425294 (1969-02-01), Klasing
patent: 3529488 (1970-09-01), Natschke
patent: 3826154 (1974-07-01), Motus et al.
patent: 3988944 (1976-11-01), Klasing
Ferrell Don E.
Miner Enterprises Inc.
Scott Samuel
LandOfFree
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