Electricity: circuit makers and breakers – Weight
Patent
1974-04-04
1976-02-03
Smith, Jr., David
Electricity: circuit makers and breakers
Weight
212 39DB, 254173R, H01H 314
Patent
active
039366227
ABSTRACT:
A load limiter is provided for a lift hoist wherein the upper portion is fastened to the lift hoist and the lower portion is fastened to a load. A micro-switch is mounted on the upper half and actuated by movement of the lower half and is provided with an adjustment screw that can be adjusted to vary the load which will break a circuit of the lift hoist. The micro-switch is used in series with an operating switch to shut off the hoist motor when the load limit is reached to prevent damage to equipment or injury to personnel.
REFERENCES:
patent: 2629851 (1953-02-01), Gilbert
patent: 2636953 (1953-04-01), Hunt
patent: 3728502 (1973-04-01), Hawkins et al.
Cable Climber Safety Devices Incorporated
Smith Jr. David
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