Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1988-08-05
1989-08-01
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310319, 310328, H01L 4108
Patent
active
048535800
ABSTRACT:
A rotary pulse generator is disclosed which generally includes a wheel rotatable about an axis. The wheel has a plurality of protrusions which deflect a piezoelectric element in a deflection zone. Several embodiments are shown. The various features include a thumbwheel in which the turning surface has teeth on it serving as the protrusions, a thumbwheel in which the teeth are directed radially inwardly, a push/pull knob which places the wheel in alignment with a selected one of three piezoelectric elements, and a wheel held in selected positions by an indent/detent mechanism with rods extending out of the side of the wheel to deflect the piezoelectric element. Yet another embodiment provides for the combination of linear and rotary pulse generation. Another form provides four sets of indicator locations with a location from each of the sets forming an aligned row of indicator locations. The protrusions are disposed selectively in the indicator locations to give each row a unique binary code when sensed by four associated piezoelectric elements.
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Anderson Edward B.
Budd Mark O.
Meza Peter J.
Tektronix Inc.
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