Pulse counter for key entries to pocket calculators - uses panel with additional key input for each calculator

摘要

A number of calculators (14-18) are mounted on a panel (13). A number of separate push button inputs (A-E) are supported on the panel, each with a coupled actuator element (A'-E') that operates the add sign key of the calculator. Each calculator registers the required number of pulses when a number key and the add sign key are operated. The unit may be reconfigured to provide subtraction of pulses for each entry if required. ADVANTAGE - Simplifies counting of key entries.