Remote Positioner for Rotary Switches

摘要

In a study of pyroelectric thermometry, it was found necessary to change the range of a vibrating reed electrometer from one of two preselected levels to the other at frequent intervals. The intervals varied from 15 sec to 3 min, and were set by means of an electrical timer. A device which could be remotely actuated by the electrical timer was needed to alternate the range of the electrometer between the two preselected levels. The most satisfactory solution was to use an externally mounted bidirectional rotary solenoid motor to rotate the switch as in normal manual operation. The positioner was designed so that its use was not restricted to a vibrating reed electrometer. Simple modifications would allow its use on almost any rotary switch.