Metal working – Method of mechanical manufacture – Electrical device making
Patent
1991-03-22
1992-07-07
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
29464, 29467, 29468, 29619, 29622, H05B 300, B23Q 300, H01C 1728
Patent
active
051271508
ABSTRACT:
A motor protector having a can and internal electrical contact is hermetically sealed to a disk-shaped header of conductive material having a flattened edge for orientation during fabrication with spaced conductive pins sealed in and insulated therefrom. A heater-support with holes for fabrication is bonded to one conductive pin, a bimetallic element parallel to the axes of the pins having a contact element normally contacting the can contact. A heater without right angle bends is bonded to each of the electrically conductive pins, is spaced from the movable contact and rests parallel to the axes of the conductive pins. The motor protector is fabricated by providing a fixture having two depressions, one somewhat in the shape of the movable contact with upwardly extending pins for mating with the support apertures therein and the second for receiving the header in an upright position and adjacent the first. The support is placed on the fixture with the pins extending therethrough for support orientation. The header is then oriented in its fixture depression with one of the pins through the header resting against the support and is bonded to the support. The movable contact is then disposed in the proper depression and welded to the support. Slider brackets then receive the heater thereon and position it on the pins to which they are secured. The formed motor protector portion is placed in the cans and hermetically sealed thereto with the contact within the can disposed against the contact element on the movable contact member.
REFERENCES:
patent: 3636622 (1972-01-01), Schmitt
patent: 4376926 (1983-03-01), Senor
patent: 4533894 (1985-08-01), Bishop et al.
patent: 4741090 (1988-05-01), Monnier
patent: 4851804 (1989-07-01), Yang
Behler Matthew L.
D'Entremont John R.
Swanson Gordon S.
Baumann Russell E.
Donaldson Richard L.
Echols P. W.
Texas Instruments Incorporated
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