Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1975-05-29
1976-10-19
Witkowski, Stanley J.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
58 23R, 58 23BA, 29177, 174 52FP, 174 52PE, 357 70, 357 72, G04C 300, H05K 506
Patent
active
039863344
ABSTRACT:
A self-encased electronic watch is fabricated by mounting a semiconductor integrated circuit chip on a metal lead frame. Connectors are utilized to connect the circuit to selected lead frame conductors. The semiconductor chip incorporates all of the electronic circuitry necessary to drive a display with decoded timekeeping signals. The lead frame includes selectively positioned conductors for connection of a display, a variable capacitor, oscillator crystal and battery contacts. The lead frame is plastic encapsulated with the plastic being formed to completely seal the integrated circuit and connectors while providing a ridged mechanical support cavity on the front surface for the display annd filter lens and mechanical support cavities on the back surface for the capacitor, crystal and batteries. Openings are provided in the plastic within the cavities and opposite the cavity formations exposing the selectively positioned conductors so that the display, capacitor and crystal may be electrically connected to the lead frame. The openings opposite the capacitor and crystal cavities on the front surface are plugged with design coordinated plastic plugs. The plastic formation includes extensions for attachment of a band and a cover is provided for the back.
REFERENCES:
patent: 3759031 (1973-09-01), McCoullough et al.
patent: 3784725 (1974-01-01), Perkins et al.
Grossman Rene
Levine Harold
Sadacca Stephen
Texas Instruments Incorporated
Witkowski Stanley J.
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