Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB539968D
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines CorpfiledCriticalInternational Business Machines Corp
Publication of GB1158025ApublicationCriticalpatent/GB1158025A/en
1,158,025. Sensing records. INTERNATIONAL BUSINESS MACHINES CORP. 3 Feb., 1967 [11 Feb., 1966], No. 5399/67. Heading G4M. A punched card or tape 32 is sensed by applying pneumatic or hydraulic pressure to a flexible diaphragm 28 bearing projections 30 aligned with the index positions on the record 32, whereby the projections 30 are forced against the record 32 and those projections which pass through holes 76 operate pressuresensitive switches, e.g. elastic diaphragm switches.
GB539968D1967-02-111967-02-03Reader for Punched Records
ExpiredGB1158025A
(en)