Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1974-07-23
1976-06-29
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
177DIG3, 177DIG6, 23515133, H03K 1300
Patent
active
039672719
ABSTRACT:
An optical shaft encoder is mounted on a mechanical scale with direct coupling between the encoder and the scale pointer. The shaft encoder generates an up or down pulse train, depending on the direction of rotation of the scale shaft. The pulse train is shaped and decoded to determine the direction of rotation. The pulses are then multiplied and/or divided as necessary to provide range scaling for a given scale capacity. The range scaled pulse train then drives a binary tally counter and a BCD counter. The BCD counter output is utilized to produce a selected number of extra pulses which are added or subtracted from the tally counter. The BCD counter corrects for a scale shaft rotation of less than 360.degree. between zero and a full scale reading. The output from the tally counters are provided to a set of seven-segment decimal counters. These counters produce outputs used to drive digital displays.
REFERENCES:
patent: 3582619 (1971-06-01), Orr et al.
patent: 3653015 (1972-03-01), Rock
patent: 3705400 (1972-12-01), Cordes, Jr.
patent: 3746842 (1973-07-01), Fowler
patent: 3826318 (1974-07-01), Baumgartner
Barber-Greene Company
Miller Charles D.
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