Measuring instruments for measuring depth of cavities

Details Measuring instruments for measuring depth of cavities Measuring instruments for measuring depth of cavities

1986-03-20

1987-07-07

Martin, Jr., William D.

Geometrical instruments

Gauge

Anatomical

33169B, 33172E, 128776, A61B 505

Patent

active

046777563

ABSTRACT:
A measuring instrument comprising a pair of probe elements moveable relative to one another to vary the spacing between sensing areas of each probe, means for producing a signal representing the spacing of said sensing areas, means for monitoring the rate of change of said signal, and means for recording and/or displaying a value representative of said signal upon the rate of change of said signal reaching a predetermined value. Preferably there is a probe including a probe element and a sheath, the probe element being slideable within the sheath and protruding therefrom by a variable amount, means for producing a depth signal representing the amount of protrusion of the probe element from the sheath, means for monitoring the rate of change of said depth signal, and means for recording and/or displaying a value representative of said depth signal upon the rate of change of said depth signal reaching a predetermined value.

REFERENCES:
patent: 3058225 (1962-10-01), Ward
patent: 3916529 (1975-11-01), Mousseau
patent: 3943914 (1976-03-01), Grenfell et al.
patent: 3993044 (1976-11-01), McGuffin
patent: 4526179 (1985-07-01), Salesky

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