| 摘要 |
810,430. Keyboard switches; switchboards. STANDARD TELEPHONES & CABLES Ltd. Oct. 21, 1957, No. 32767/57. Addition to 810,074. Class 38 (5). [Also in Group XXXIX] A jack, key or lamp strip is built up of individual units 22 bolted and keyed together between end pieces 25 and 26. The units are keyed by means of frusto-conical projections 18, 19, which mate with corresponding recesses such as 20, 21 provided on each unit.
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