Brakes – Operators – Speed-responsive
Patent
1987-06-02
1987-12-22
Caldwell, Sr., John W.
Brakes
Operators
Speed-responsive
188180, 188250A, 74505, G05G 108, F16D 5110
Patent
active
047141425
ABSTRACT:
In a hand brake mechanism for railway cars in which a chain drum is rotatable by a manually rotatable shaft connected to the chain drum by a gear train, a centrifugal governor or brake connected to an intermediate gear of the gear train reduces the speed of rotation of the gears only after the force applied to the brakes has been substantially reduced, and hence even though the initial speed of rotation of the drum and the let-out speed of the chain when the brake is first released is substantially unaffected, the governor or brake is effective as the forces are reduced to substantially the forces of inertia of the brake mechanisms, the hand brake parts and the chain, so as to reduce the speeds of rotation of the hand brake parts to a small value and thereby prevent damage to and wear of the parts and increase the life of the hand brake mechanism.
REFERENCES:
patent: 1190483 (1916-07-01), Tibbals
patent: 1339380 (1920-05-01), McCloud
patent: 2181359 (1939-12-01), Barrett
patent: 2372026 (1945-03-01), Smith
patent: 3176539 (1965-04-01), Mersereau
patent: 3529488 (1970-09-01), Natschke
patent: 3796289 (1974-03-01), Benjamin et al.
patent: 3979969 (1976-09-01), O'Brien
patent: 4128148 (1978-12-01), Schmitt
patent: 4182197 (1980-01-01), Olander
Caldwell Sr. John W.
Ellcon-National, Inc.
Oberley Alvin
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