Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1982-10-12
1985-05-28
Levy, Stuart S.
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254379, 303 13, B66D 150, B66D 526
Patent
active
045195854
ABSTRACT:
Apparatus for controlling a brake on a drawworks having cable wound thereon. A tension gauge detects the tension in the cable which is displayed on a switch gauge. A pulse generator provides periodic pulses to one side of a relay having a set of normally open contacts. When the tension is at or above a preselected level, the other side of the relay is grounded. The relay contacts pulse a pneumatic relay which is connected to a ram that operates the drawworks brakes. When tension is at or below a preselected level, a second pneumatic relay is actuated for maintaining the ram in a brake activating condition. A switch is connected to a third pneumatic relay, which in turn is connected to the ram to permit manual brake activation and deactivation.
REFERENCES:
patent: Re24818 (1960-04-01), Gresham et al.
patent: 1779656 (1930-10-01), Brauer
patent: 1919611 (1933-07-01), Besigk
patent: 2117078 (1938-05-01), Brauer
patent: 2274339 (1942-02-01), Loomis
patent: 2528883 (1950-11-01), Hayward
patent: 2663386 (1953-12-01), Fenley
patent: 2703008 (1955-03-01), Seljos et al.
patent: 2809518 (1957-10-01), Grandstaff
patent: 3373823 (1968-03-01), Fullerton et al.
patent: 3605919 (1971-09-01), Bromell et al.
patent: 3759489 (1973-09-01), Jones
patent: 3836122 (1974-09-01), Pierce, Jr.
patent: 3990583 (1976-11-01), Nishida et al.
patent: 4046355 (1977-09-01), Martin
Article entitled, "Drillers Take a Look at Automation", Oil and Gas Journal, Aug., 1957, pp. 9-26.
Cooper Industries
Jaekel Katherine
Levy Stuart S.
McCollom Alan T.
Scott Eddie E.
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