Electronic analogue display

Details Electronic analogue display Electronic analogue display

1986-03-17

1988-09-13

Roskoski, Bernard

Horology: time measuring systems or devices

Combined with disparate device

Ambient condition detector

368223, 368241, G04B 4706

Patent

active

047714093

ABSTRACT:
An analogue display has a circle of electrically-energizable elements that are selectively energized so as to represent time. A rotatable setting wheel has a knurled edge that projects from the display casing. A leaf spring engages the knurled edge, the spring having a piezo-electric element on its surface which produces pulses dependent on rotation and direction of rotation of the wheel. Different elements are energized around the circle, as the wheel is rotated, according to the speed and direction of rotation. A second value, such as temperature, can be represented if each element extends radially and is divided into separate sub elements. By energizing different numbers of the sub elements, the apparent radial length of the element can be varied to represent the second value.

REFERENCES:
patent: 4364672 (1982-12-01), Shibuya et al.
patent: 4379642 (1983-04-01), Meyrat
patent: 4385842 (1983-05-01), Wiesner
patent: 4419018 (1983-12-01), Meyrat
patent: 4600316 (1986-07-01), Besson

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