Communications: electrical – Selective – Monitoring in addition to control
Patent
1977-01-28
1979-01-02
Farley, Richard A.
Communications: electrical
Selective
Monitoring in addition to control
152565, 114244, 114254, 242 54R, B63B 2116
Patent
active
041329732
ABSTRACT:
A cable wiper assembly for airborne sonar includes a housing suspended from a hoist used to rapidly raise and lower a sonar transducer at the end of a cable. The wiper assembly is interposed ahead of the cable-directing sheaves forming part of the hoist to strip away the sea water which adheres to the cable as it is pulled from the ocean. The housing includes a plurality of wiper stages, each of which consists of a washer-like rubber wiper whose internal diameter is just slightly smaller than the cable diameter and a spacer having substantial thickness interposed between wipers with a centrally located well on one side and a flat surface on the other. Radial passageways at the bottom of the wells direct water stripped away by the wipers to the outside of the spacers. The housing includes means clamping the wipers and spacers together and also radial ports for discharging the water flowing away from the spacers. As the cable is deployed, it moves downwardly, causing the wipers to deflect into the wells, thereby interposing insignificant resistance or wiping action on the cable. On retrieval, the cable pulls the wipers against the flat surface of the spacers, causing the wipers to bind against the cable, thereby wiping away water adhering to the cable.
REFERENCES:
patent: 3159806 (1964-12-01), Piasecki
patent: 3604387 (1971-09-01), Hale et al.
patent: 3999240 (1976-12-01), Uchida
Farley Richard A.
Smith Robert C.
The Bendix Corporation
Thornton William F.
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