Scanning temperature display system

Details Scanning temperature display system Scanning temperature display system

1983-03-11

1986-01-07

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

Plural transmitters

34087017, 34082510, 370 58, G08C 1512, G08C 1912

Patent

active

045636826

ABSTRACT:
A scanning display system for providing a sequential display of a number of temperature signal inputs. The inputs are coupled through a multiplexer to sequentially produce single output signals, which are in turn scaled and displayed in a digital display. Some of the inputs to the multiplexer may not be used, leaving certain unused inputs which are sequentially coupled to the output of the multiplexer. The multiplexer normally advances through the inputs at a particular clocking rate, as determined by a first clocking signal, at a selected frequency. The scanning display system recognizes the coupling of an unused input to the multiplexer output and advances the multiplexer using a second, higher frequency, clocking signal until the next used input is reached. In this way, only temperature inputs for used channels are displayed in the digital temperature display. A manually operated switch is also provided to advance the multiplexer through the sequence of input temperature signals.

REFERENCES:
patent: 3798624 (1974-03-01), Baxter
patent: 3974478 (1976-08-01), Griffith
patent: 4413175 (1983-11-01), Schilling
patent: 4472793 (1984-09-01), Benjaminson
patent: 4483631 (1984-11-01), Kydd

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