Geometrical instruments – Gauge – Automotive
Patent
1997-06-17
1999-02-16
Bennett, G. Bradley
Geometrical instruments
Gauge
Automotive
3320311, 33832, 33836, G01B 500, G01B 518, G01B 502
Patent
active
058708359
ABSTRACT:
A measuring gauge intended for use in conjunction with an automotive vehicle alignment system is disclosed to measure and record various measurements associated with automotive maintenance such as tire tread depth, tire pressure, and brake rotor thickness. The measuring gauge comprises a spring loaded plunger axially mounted within a cylindrical body or housing. Extending beyond the housing, one end of the plunger is adapted to linearly engage surface being measured. The opposite end, also extending beyond the housing, is adapted for insertion with a sensor port on an alignment system, and includes a series of annular grooves adapted to drive a rotary encoding sensor within the port. During use, the contact end of the plunger is depressed by the surface undergoing measurement, and the insertion end proportionally extended, revealing a number of the annular grooves. An internal lock secures the plunger in the depressed position upon removal of the gauge from the surface undergoing measurement. Insertion of the insertion end of the gauge within the sensor port engages the rotary encoder sensor with the annular groove. Releasing the locking mechanism causes the spring loaded plunger to return to its original extended position. The rotary encoder sensor detects this displacement and the associated measurement is recorded.
REFERENCES:
patent: 1241161 (1917-09-01), Starrett
patent: 3269019 (1966-08-01), Krohn
patent: 3721010 (1973-03-01), Ristow
patent: 5333342 (1994-08-01), Huang
patent: 5369602 (1994-11-01), Naas et al.
Bennett G. Bradley
Hunter Engineering Company
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