Device for automatically detecting overload on aerial ladder tru

Details Device for automatically detecting overload on aerial ladder tru Device for automatically detecting overload on aerial ladder tru

1974-11-21

1976-06-22

Trafton, David L.

Communications: electrical

Systems

Call station

182 18, G08B 1900

Patent

active

039654648

ABSTRACT:
A safety device is provided for association with an aerial ladder truck assembly to automatically detect a weight overload on the ladder unit of the assembly at any given angle. The safety means are characterized by providing ladder angle detecting means in the form of a disk provided with a plurality of contacts and a pointer operatively associated with the ladder which engages a given contact at a given angle position of the ladder, and a load indicating means which actuate a pointer mounted on a disk provided with a plurality of contacts, each of which indicates a load value with the angle indicating contacts and the load indicating contacts of each disk being electrically connected to one another and an alarm device to give an alarm when there is a weight overload on the ladder unit at the angle it is positioned.

REFERENCES:
patent: 2030529 (1936-02-01), Nash
patent: 2346066 (1944-04-01), Conrad
patent: 2418576 (1947-04-01), Conrad
patent: 2615609 (1952-10-01), Balogh et al.

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