Vehicle thermometer for measuring outside temperature

Details Vehicle thermometer for measuring outside temperature Vehicle thermometer for measuring outside temperature

1978-09-05

1980-01-08

Swisher, S. Clement

Measuring and testing

Gas analysis

Moisture content or vapor pressure

73349, G01K 114, G01K 1302

Patent

active

041821823

ABSTRACT:
A thermometer for use in a vehicle to indicate the outside temperature to the driver. A rotary drum temperature indicator is located within the driver's compartment of the vehicle while a bimetallic sensing unit is located outside the compartment. The sensing unit is mechanically coupled to the drum indicator and extends therefrom into the housing of a rear view mirror. The housing contains openings which admit the outside air. When the vehicle is in motion a stream of air flows through these openings and is directed to flow over the sensing unit so that the temperature of the latter conforms to the temperature of the outside air. As the temperature changes, the sensing unit causes a proportionate rotation of the rotary drum relative to a reference line so that the position of a temperature scale imprinted upon the drum may be read relative to the reference line for determining the outside temperature. A resilient insulating sleeve encircles a stem member extending between the indicator and the sensing unit so as to isolate the sensing unit from air inside the vehicle. The thermometer is rotatably adjustable to permit adjustment of the indicator for individual eye levels.

REFERENCES:
patent: 2638785 (1953-05-01), Vacanti
patent: 3107533 (1963-10-01), Le Van et al.
patent: 3170328 (1965-02-01), Werner et al.
patent: 3512414 (1970-05-01), Rees
patent: 3842675 (1974-10-01), Hunt

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