Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-06-02
1995-09-26
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
340686, 414401, G08B 2100
Patent
active
054537355
ABSTRACT:
A signal and control system is provided in which signal lights are provided on the inside and outside of a dock facility to give dock personnel and truck drivers clearly visible indications of when it is safe or unsafe to load or unload a truck or to park to remove a truck, dependent upon the condition of switches on the inside which are accessible to dock personnel and to the condition of a locking device on the outside which is engageable with the safety bar of a truck. A slip clutch and a position sensor cooperate to control and avoid adverse effects of slippage in the locking device, a horn is energized to provide a loud audible warning of dangerous conditions, a key pad is used to enter a security code and other features are provide for increased safety and reliability.
REFERENCES:
patent: 3537094 (1970-10-01), Hawkins et al.
patent: 4205300 (1980-05-01), Ho et al.
patent: 4222047 (1980-09-01), Finnegan
patent: 4264259 (1981-04-01), Hipp
patent: 4692755 (1987-09-01), Hahn
Dik, Lok ADL-100 Series Owners Manual Published Apr. 1983.
Hofsass Jeffery A.
Rite-Hite Corporation
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