Electricity: circuit makers and breakers – Electric switch details – Contact
Patent
1980-06-20
1981-11-17
Wityshyn, Michael G.
Electricity: circuit makers and breakers
Electric switch details
Contact
29622, 29878, 29882, 156 731, 156293, 179158R, 200 1A, 200303, 264 23, H01H 126, B23K 1904, B29C 2708
Patent
active
043013430
ABSTRACT:
A piece part, such as a flat metal contact spring (12), is mounted between two plastic details (11 and 25), so that an end portion of the spring 12 projects from the mounting details. One of the details, such as a base member 11, has a cavity 17 within which the spring is placed so that a mounting section (12A) fits within the cavity. The second detail, such as a thermoplastic locking insert 25, includes a finger 25B adapted to fit in the cavity adjacent to the spring section (12A). The insert is provided with pointed energy directors (30 and 31) arranged so that the members can be heated and compressed together, and the directors melt to weld the parts together. The insert and/or the base member is formed with slots (33) so positioned that portions of the molten plastic are forced to flow into the slots during the process so as to encapsulate the mounting section of the spring or other piece part in the plastic.
REFERENCES:
patent: 3485982 (1969-12-01), Maire
patent: 3499809 (1970-03-01), Wysong
patent: 3702981 (1972-11-01), Wahnschaffe
patent: 3705380 (1972-12-01), Roberts
patent: 3806386 (1974-04-01), Burke et al.
patent: 3944261 (1976-03-01), Reed et al.
patent: 4046610 (1977-09-01), Lilja
patent: 4083023 (1978-04-01), Cherny et al.
Landis J. L.
Western Electric Company, Incorporated
Wityshyn Michael G.
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