Electrical resistors – Mechanically variable – Movable contact electrically adjustable over length of...
Patent
1982-11-24
1984-10-23
Albritton, C. L.
Electrical resistors
Mechanically variable
Movable contact electrically adjustable over length of...
338183, 338184, 338195, 338199, H01C 1038
Patent
active
044791070
ABSTRACT:
A potentiometric linear position sensor including a housing (10) made of extruded aluminum which may be cut to preferred lengths (15). The sensor includes a Kapton film substrate (32) having first a uniform coating of resistive material (34) disposed thereon, and then distinct islands formed by laser sculpting. Conductive material (50, 53, 55, 56, 57, 58), screen printed upon the resistive material before or after the laser sculpting, is connected to terminal means (62, 68, 70) for the respective electrical elements (48, 51, 55). The flexible Kapton film substrate (32) is inserted endwise into the housing (10) with the side edges of the substrate curled upwardly and captured within longitudinal housing slots (28, 29) disposed along opposite housing walls (14, 16). The housing (10) is sealed by end closure means (60, 90), one closure means (60) having the termination means (62, 68, 70) connected to conductive paths (53, 56, 60) disposed on the respective electrical elements (48, 51, 55), and the other end closure means (90) providing securement for an extension spring (104) and journalling for a shaft (116) attached to a combination slider-and-contactor (76, 77) disposed within the housing. Displacement of the shaft (116) stretches the extension spring (104) and effects a corresponding longitudinal movement of the contactor (77) along the resistive element (48) and collector path (51). An alternative embodiment includes an exterior magnetic actuator (134) located exteriorly of the housing (10) and coupled magnetically with the interiorly disposed slider (176) for movement therewith.
REFERENCES:
patent: 2922977 (1960-01-01), Gottschall
patent: 3392360 (1968-07-01), Guggenheim et al.
patent: 4053865 (1977-10-01), Brown, Jr.
patent: 4172248 (1979-10-01), Okuya
patent: 4251796 (1981-02-01), Soeda et al.
Albritton C. L.
CTS Corporation
Flagg Rodger H.
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