Method of making an electrical current input to a pneumatic sign

Details Method of making an electrical current input to a pneumatic sign Method of making an electrical current input to a pneumatic sign

1983-06-13

1984-12-25

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

29622, 335258, H01F 4100, H01H 1100

Patent

active

044894830

ABSTRACT:
An electrical current input to a pneumatic signal output transducer construction wherein the signal is substantially proportional to the current and is generated by a pneumatic relay of the construction that is controlled by an electrical current receiving unit of the construction, the current receiving unit comprising a fixed electrical coil that is adapted to have the current flow therethrough and a movable armature disposed in the coil and being operatively interconnected to the relay to control the relay in relation to the position of the armature relative to the coil.

REFERENCES:
patent: 4194687 (1980-03-01), Scott
patent: 4218669 (1980-08-01), Hitchcock et al.
patent: 4286243 (1981-08-01), Bauer
patent: 4290040 (1981-09-01), Feightner et al.
patent: 4304391 (1981-12-01), Yamaguchi

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