Metal working – Method of mechanical manufacture – Electrical device making
Patent
1989-07-12
1990-08-28
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
29619, 29622, 29844, 29430, 338312, 338313, H01C 1728
Patent
active
049513788
ABSTRACT:
A process of automatic sequential production of potentiometers, and potentiometers obtained thereby. The potentiometers are generally low profile rotary-type potentiometers. The potentiometers are formed with a low profile cylindrical casing into which is inserted a laminate electrical resistance element of an incomplete annular shape, the ends of which remain connected to terminals. The casing engages a slider, which is in permanent mechanical and electrical contact with the resistance element and a collector terminal. The slider is assembled on a slider-holder rotatably attached through an aperture formed axially through the body and which is operable from the external surface of the casing. The process consists of automatically assembling the potentiometers in an in-line process. The metallic components are formed on a continuous metallic band by die-cutting the band to produce such components. The die-cut components are moved through the process and at the appropriate stages are removed from the band for assembly with other components of the potentiometer. The resulting potentiometer is attached to one of the original bands whereupon the potentiometers attached thereto are mechanically and electrically tested. After the potentiometers have been completely assembled and tested, they are removed from the final band.
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Blackstone, Jr. R. A.
Compel, S.A.
Echols P. W.
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