Metric/English orometer

Details Metric/English orometer Metric/English orometer

1989-08-23

1991-07-23

Cuchlinski, Jr., William A.

Signals and indicators

Indicators

Rotary indicator with actuating means

116334, 116DIG47, G01D 1310

Patent

active

050334026

ABSTRACT:
Instruments are readable in either feet or meters by printing a metric altitude scale on the inner surface of a rotating protective crystal that shields the English altitude scale and the indicating needle. The metric altitude scale covers 1,000 meters and extends 33.7.degree. beyond a full circle. A series of kilometer index marks is formed at intervals of 33.7.degree. on the face of a bezel which surrounds the English scale. To use the metric scale, the user holds the bezel to align the index arrow line with the appropriate kilometer index mark, according to the user's elevation. Subsequently, if the needle moves beyond either limit of the metric scale, it is only necessary to rotate the crystal 33.7.degree. in the appropriate direction, thereby aligning the "0" meter line with the adjacent index mark.

REFERENCES:
patent: 1351130 (1920-08-01), Roesch
patent: 2612132 (1952-09-01), Triplett
patent: 3978730 (1976-09-01), Anderson
patent: 4055141 (1977-10-01), Homs
patent: 4108103 (1978-08-01), Ammar

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