| 摘要 |
A signal actuator module having a set of spring loaded levers which can be in one of at least two operating positions is disclosed. The various positions of the levers in the set represents a code. The module is for mounting on other equipment such as a signal transmitter which contains cooperating switches. The switches are operated by magnetic or mechanical means attached to the levers and movable therewith. The module is completely enclosed by a cover which when opened permits all of the levers to return to the same position thereby preventing discovery of the code.
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