Electronic transmitter element and a lifting device comprising s

Details Electronic transmitter element and a lifting device comprising s Electronic transmitter element and a lifting device comprising s

1982-03-23

1984-06-26

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

7386265, 177147, G01L 500

Patent

active

044558805

ABSTRACT:
An electronic transmitter element intended for use in connection with a lifting device in order to generate an electric signal corresponding to the load being handled. The transmitter element comprises a tensile link (1) to which strain gauges are fixedly attached, said tensile link being exerted to tensile stress corresponding to the load handled by the lifting device in order to generate an electric signal corresponding to said load. At least one safety link (3) is disposed in parallel with the tensile link, preferably two safety links on each side of the tensile link and is designed to absorb greater loads than the tensile link. In normal operation the tensile link will absorb the entire load acting on the transmitter element. However, the safety link will take over at least a portion of the load acting on the tensile link if the latter is ruptured or abnormally elongated. The transmitter element can be used in a lifting device with a stationary pulley wheel to support one end of the pulley axle, whereas the opposite end is pivotally supported in the frame of the lifting device.

REFERENCES:
patent: 3289473 (1966-12-01), Louda
patent: 3290931 (1966-12-01), Fowkes et al.
patent: 4140010 (1979-02-01), Kulpmann et al.
Fofanov-"Electrical Traction Dynamometers", Meas. Techniques (Oct. 74) vol. 17, No. 10, pp. 1530-1532, Pub. 3/1975.

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