IBM Electric Punched Card Accounting Machines -- Customer Engineering Manual of Instruction -- Functional Units. IBM.
IBM Electric Punched Card Accounting Machines -- Customer Engineering Manual of Instruction -- Functional Units
IBM Electric Punched Card Accounting Machines -- Customer Engineering Manual of Instruction -- Functional Units
IBM Electric Punched Card Accounting Machines -- Customer Engineering Manual of Instruction -- Functional Units
IBM Electric Punched Card Accounting Machines -- Customer Engineering Manual of Instruction -- Functional Units

IBM Electric Punched Card Accounting Machines -- Customer Engineering Manual of Instruction -- Functional Units.

Condition: IBM NY 1953, 142 pages, double-column text, illustrations, photographs, wiring diagrams throughout.

Price: $45.00

Item Description

Contents include -- Card Feeding and Sensing (card feed unit; column by column feed; digit by digit feed; card sensing, timing, pin sensing, mark sensing, Preventive Maintenance; Punching Mechanisms -- punch control, requirements, sequence, more; Clutch Mechanisms -- Friction drive clutches; Positive Drive clutches;

Commutation and Control -- Relays; Cam-operated contacts; Cam contacts and relays in a typical circuit; Commutators and Emitters; control panels; Accumulating Mechanisms ; Printing Mechanisms; Storage Units; Calculating Mechanisms --type 602A calculating punch; counter operation during multiplications; Electronic Calculator method of calculation, more.