ELECTRONIC INSTRUMENT MOVEMENT/BAROMETER

WIPO Patent Application WO2005114125

A3

An instrument [particularly barometer] movement includes a plurality of elements including a pressure transducer capable of sensing barometric pressure and converting the sensed pressure into electric signals, a stepper motor having an hour shaft used in a conventional quartz clock movement, a microprocessor, and a battery, operatively connected together so that the microprocessor controls movement of the stepper motor with power supplied by the battery in response changes in atmospheric pressure sensed by the pressure transducer; and a housing mounting the plurality of elements with the motor shaft extending outwardly from the housing. Other transducers, such as temperature or humidity, may alternatively be utilized. Other d. c. motors with positional feedback may sometimes alternatively^,be used in place of the stepper motor. The movement is operatively connected to a pointer (which may be much larger and heavier than in conventional analog instruments) which is accurately moved by the d. c. motor with respect to a dial with barometric or other indicia. An alarm, and battery voltage sensing circuitry, may be mounted within the housing and operatively connected to the microprocessor and activated by the microprocessor when the battery voltage drops below a predetermined threshold. The microprocessor preferably controls the battery so that the battery is substantially in an inactive mode more than 95% of the time. The microprocessor can also activate a second mode of the alarm if the change in the environmental condition sensed between two or more spaced transducer readings is greater than a predetermined threshold. A second dial with second pointer and motor may be utilized to indicate other environmental conditions (such as pressure rate of change, temperature, or humidity).

NUNES BRENDON (CA)
RUMMELL PETER (CA)

PCT/US2005/014813

November 16, 2006

April 29, 2005

Click for automatic bibliography generation  

TRINTEC IND INC (CA)
VANDERHYE ROBERT A (US)
NUNES BRENDON (CA)
RUMMELL PETER (CA)

G01L7/12; G01L7/00; G01L19/08; G01L19/10; G01L19/16

US6394977B1	2002-05-28
US5724317A	1998-03-03
US4638664A	1987-01-27
US4597288A	1986-07-01
US4543824A	1985-10-01
US3940991A	1976-03-02
US3654808A	1972-04-11
US3623051A	1971-11-23

See also references of EP 1747440A4

View/Download PDF      PDF Help

Previous Patent: TEMPERATURE SENSOR AND TEMPERATURE MONITORING DEVICE

Next Patent: ELECTRONIC ALIGNMENT SYSTEM