Electronic calculator assembly

Details Electronic calculator assembly Electronic calculator assembly

1978-04-24

1980-04-08

Smith, Jr., David

Boots, shoes, and leggings

361414, 364712, 361398, H05K 500, G06M 102

Patent

active

041975863

ABSTRACT:
An electronic calculator assembly is disclosed having a flexible printed circuit board bonded to a layer of resilient material mounted on a rigid backing plate. An integrated circuit package containing electronic calculator circuitry is held tightly against the flexible printed circuit board by a cradle assembly. Leads from the integrated circuit package make contact areas on the flexible printed circuit board and depress the flexible printed circuit board into the resilient layer. A keyboard assembly is mounted to the opposite side of the rigid member and the flexible printed circuit board is folded around the rigid member so that contact areas on the flexible printed circuit board also form fixed switch contacts for the keyboard.

REFERENCES:
patent: 2881364 (1959-04-01), Demer et al.
patent: 3002169 (1961-09-01), Kamm
patent: 3818279 (1974-06-01), Seeger, Sr. et al.
patent: 3885173 (1975-05-01), Lee
patent: 3911234 (1975-10-01), Kotaka
patent: 3967162 (1976-06-01), Cresa et al.
patent: 4118102 (1978-10-01), Kuist et al.

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