Communications: electrical – Systems – Call station
Patent
1974-09-06
1976-01-13
Swann, III, Glen R.
Communications: electrical
Systems
Call station
212 39A, 235186, G08B 2100
Patent
active
039328554
ABSTRACT:
A transducer is mounted on the boom to produce an electrical signal proportional to the angle the boom has moved in a horizontal plane. A resistance related to the boom length receives the output of the transducer and supplies a current proportional to L Cos .theta. where L is the boom length. A potentiometer supplies a current proportional to the offset distance from the boom hinge point to the rotating axis of the crane and an indicator means receives the current proportional to both the L Cos .theta. and the offset distance for indicating the operational radius of the crane.
REFERENCES:
patent: 3079080 (1963-02-01), Mason
patent: 3549876 (1970-12-01), Hamilton
patent: 3819922 (1974-06-01), Horn et al.
Dwelle John R.
Eaton Corporation
Swann III Glen R.
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