Depth gauge

Details Depth gauge Depth gauge

1975-12-22

1977-02-01

Phillips, Charles E.

Geometrical instruments

Area integrators

Electrical

33169B, 128 92EB, 250312, G01B 304, G01B 328

Patent

active

040055272

ABSTRACT:
A depth gauge includes a number of alternating sections of material which are X-ray transparent and X-ray opaque, respectively. The sections are carried in an elongated cylinder, and are each of a predetermined known length. The depth gauge is insertable into a hole or cavity to be measured, and viewed with X-ray techniques, from any angle. The number of sections of X-ray transparent and opaque material being within the hole, as seen by the X-ray techniques, indicate the depth into the hole which the pin is inserted. In one embodiment, a drill point is included on the end of the elongated cylinder to enable the depth gauge to be used additionally as a drill, so that depth to which the drill has cut can be monitored during the drilling process, if desired.

REFERENCES:
patent: 1904234 (1933-04-01), Hoskin et al.
patent: 2187039 (1940-01-01), Kohler
patent: 2265208 (1941-12-01), Thompson
patent: 3367326 (1968-02-01), Frazier
patent: 3915162 (1975-10-01), Miller
The Journal of Bone and Joint Surgery, vol. XVIII, No. 1, Jan. 1936, pp. 134-139.

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