Registers – Transfer mechanism – Traveling pawl
Patent
1974-09-16
1977-01-11
Dildine, Jr., R. Stephen
Registers
Transfer mechanism
Traveling pawl
200292, 307150, 307154, 317101C, 339 17LC, 339 17M, G06F 1502
Patent
active
040028925
ABSTRACT:
A portable electronic calculator is provided with a housing carrying a first printed circuit board having the operating parts mounted thereon, i.e., keyboard, electronic arithmetic unit, and multi-digit display unit. The housing is of rectangular outline and of shallow height, and is provided at one end with a receptacle communicating with the first printed circuit board and opening at the end of the housing. An electrical supply unit is mounted on a second printed circuit board which slides into said receptacle, said two printed circuit boards having plug-and-socket connection means therebetween for automatically making and breaking connections when said second printed circuit board and electrical supply unit are inserted into or removed from said receptacle.
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Sedaris, L. H. et al., Elastic Diaphram Switch in IBM Tech. Disc. Bull. 14(3); p. 767, Aug. 1971.
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