Means for simultaneously connecting a plurality of switch-type p

Geometrical instruments – Gauge – Having a movable contact probe

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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.

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