Registers – Miscellaneous – Numeral wheels
Patent
1989-04-28
1991-05-14
Scott, J. R.
Registers
Miscellaneous
Numeral wheels
200 5A, 200308, 235145R, 361380, G06C 702, H01H 1300, H05K 1000
Patent
active
050158295
ABSTRACT:
A front panel assembly for an electronic instrument having a one-piece key pad with a plurality of protuberances thereon. The protuberances are formed in groups according to function and all protuberances in a group are positioned in proximity to each other. Each group of protuberances has a header protruberance defining the function of the group. Each protrusion, except the header protuberances has a corresponding electrical switching member connectably attached thereto. Each protuberance, except the header protrusions, functions as a key. When a key protuberance is pressed, the corresponding electrical switching member is pressed into operative engagement with a corresponding circuit on the circuit board. An alternate embodiment allows one group of keys to be replaced with a rotary dial without remaking the key pad.
REFERENCES:
patent: 3643041 (1972-02-01), Jackson
patent: 3699294 (1972-10-01), Sudduth
patent: 4066850 (1978-01-01), Heys, Jr.
patent: 4066851 (1978-01-01), White et al.
patent: 4231098 (1980-10-01), Tanimoto
patent: 4570521 (1986-02-01), Fox
patent: 4820887 (1989-04-01), Schmitz
patent: 4836256 (1989-06-01), Meliconi
Ames, IV Wilbur R.
Eilert Randall N.
Hewlett--Packard Company
Scott J. R.
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