Rotary position transducer having hinged circuit boards

Details Rotary position transducer having hinged circuit boards Rotary position transducer having hinged circuit boards

1988-05-27

1990-05-01

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

29831, 324163, 32420725, 34087032, 361398, 361412, G01B 729, G01P 344, H05K 1114, H05K 716

Patent

active

049221990

ABSTRACT:
A position transducer has an input shaft coupled to a variable inductance sensor to produce an output electrical signal representing shift angle position. The transducer includes a plurality of rigid circuit boards which are hinged to one another so that the circuit boards and the electronic circuitry supported on the boards can be wrapped around the variable inductance sensor. The individual rigid circuit board segments are laminated onto a flexible sheet having conductive tracks. The track sheet provides the hinged effect.
The power supply which is mounted on one or more of the boards provides DC power through an AC circuit fed by a transistor which is switched on and off as a function of the power needs of the transducer. By thus having an ON duty cycle substantially less than 100 percent, the heat generated in the power supply is minimized thereby making feasible the packing density afforded by the plurality of hinged circuit boards.

REFERENCES:
patent: 3113248 (1963-12-01), Friedman
patent: 3873889 (1975-03-01), Layba
patent: 3971127 (1976-07-01), Giguere et al.
patent: 4104701 (1978-08-01), Baranowski
patent: 4107604 (1978-08-01), Bernier
patent: 4510551 (1985-04-01), Brainard, II
patent: 4604575 (1988-08-01), Shimizu et al.
patent: 4728834 (1988-03-01), Kumar et al.
patent: 4742183 (1988-05-01), Soloway et al.
patent: 4810917 (1989-03-01), Kumar et al.
Kerjilian et al., High Density Memory Package, IBM Technical Disclosure Bulletin vol. 27 No. 4B Sep. 1984, p. 2642.

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