Indicator instruments

Measuring and testing – Navigation – Ship's log

Patent

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Details

73432A, 116DIG43, G01C 2110

Patent

active

044958064

ABSTRACT:
A Mach/airspeed indicator instrument has two pressure capsules each of which have a finger projecting from one face which is displaced by deflection of the capsule. Each finger is coupled to a respective arm that extends radially from respective shafts, so that displacement of a finger causes rotation of the respective shaft about its axis. Rotation of one shaft causes rotation of a Mach scale plate whereas rotation of the other shaft causes rotation of a pointer around an airspeed scale. The rear end of the Mach shaft is rotatably mounted at one end of a radially-extending lever that is in turn pivotally mounted close to its other end. The airspeed shaft is coupled with the Mach shaft by means of a link that extends between a plate fixed to the airspeed shaft and the lever. Rotation of the airspeed shaft thereby causes rotation of the lever and lateral displacement the Mach shaft about a pivot point at the end of the finger. This produces a rotational component about the axis of the Mach shaft that ensures linear displacement of the Mach scale plate.

REFERENCES:
patent: 2783650 (1957-03-01), Street
patent: 3154944 (1964-11-01), Johanson
patent: 3205708 (1965-09-01), Andresen, Jr.
patent: 3465583 (1969-09-01), Molis

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