Geometrical instruments – Gauge – Having a movable contact probe
Patent
1987-10-08
1988-11-22
Hix, L. T.
Geometrical instruments
Gauge
Having a movable contact probe
33558, 33561, G01B 700
Patent
active
047855452
ABSTRACT:
Plural switch-type probe heads used in a coordinate-measuring machine are electrically connected in parallel, and each probe head contains a resistor (106) which is series-connected to its switch contact (103/110). In addition, each probe head has a measurement resistor (108) which is independent of switch contacts, and the measurement resistors of all probe heads are also connected in parallel. The operative work-contacting switch signal is produced from a comparison of the currents flowing through the measurement resistors (108) and the series resistors (106).
REFERENCES:
patent: 4084323 (1978-04-01), McMurtry
patent: 4608763 (1986-09-01), Manns et al.
Carl-Zeiss-Stiftung Heidenheim/Brenz
Hix L. T,.
Porterfield David
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