Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1976-06-25
1978-03-07
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
G08C 906
Patent
active
040782328
ABSTRACT:
a Bourdon tube is situated down hole in an oil well or the like, and has attached thereto a coded wheel which rotates an amount determined by the sensed down hole pressure. The wheel has a number of transparent and opaque concentric bands thereon which form a gray code pattern indicative of a selected range of pressures. A plurality of radiant energy transmitters are radially positioned on one side of the wheel in optical alignment with each of the respective bands. A plurality of radiant energy sensors are positioned and aligned in a like manner on the other side of the wheel for sensing the passing or blocking of the radiant energy by the respective bands formed on the wheel. Included is a digital logic circuit controlled by a temperature responsive oscillator which provides timing signals having a frequency determined by the sensed down hole temperature. The logic circuit responds to the signals sensed by the sensors for providing a binary coded output signal indicative of the sensed down hole pressure and temperature, wherein the sequence of the bits in the signal is indicative of the pressure and the frequency of the signal is indicative of the temperature.
REFERENCES:
patent: 3020535 (1962-02-01), Gevas
patent: 3196431 (1965-07-01), Papelian
patent: 3229280 (1966-01-01), Chapin
patent: 3357011 (1967-12-01), Diaz
patent: 3388392 (1968-06-01), Fisher
patent: 3534360 (1970-10-01), Hafle
patent: 3710375 (1973-01-01), Brean
patent: 3725904 (1973-04-01), Breslow
patent: 3833901 (1974-09-01), Fowler
Lynes, Inc.
Miller Charles D.
Norvell, Jr. William C.
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