摘要 |
A control includes a drum ( 36 ) that is rotatably mounted in a housing ( 22 ), and includes devices for generating signals to indicate the direction in which the drum is turning and for generating signals to indicate which end of the drum is depressed. A gear ( 100 ) is fixed to the drum, and as the drum rotates a deflectable contact element (T 6 ) is repeatedly deflected by teeth of the gear to repeatedly engage a stationary contact (T 4 , T 5 ). The deflectable contact element is in the form of a wire with a deflectable part ( 104 ) deflected by gear teeth, a mount part ( 110 ) mounted on the housing, and a contacting part ( 108 ) that repeatedly engages the stationary contact, all being part of the wire. Depression of one end of the drum results in depression of a corresponding end of a sheet metal trigger member ( 30 ) that is free to snap down against a stationary contact (T 2 , T 3 ). Stationary contacts that are repeatedly contacted, are in the form of wires with fixed first end and with free or fixed second ends.
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