Geometrical instruments – Area integrators – Electrical
Patent
1981-06-22
1983-09-13
Swisher, S. Clement
Geometrical instruments
Area integrators
Electrical
73105, G01B 520
Patent
active
044034199
ABSTRACT:
A profile measuring apparatus is used to detect and record the variations in profile of a substantially planar surface and consists of a frame, front and rear rollers mounted to the frame, a follower rotatably mounted to the frame and extending outwardly between the front and rear rollers so that it may rotate from the frame at least as far as the rollers, a lever rotatably mounted to the frame and responsive to the rotating of the follower, a support mounted to the frame to which the lever is rotatably mounted, and a recording apparatus for measuring the movement of the lever thereby recording the rotation of the follower. The recording apparatus consists of a coiled strip of paper which is uncoiled by rollers which are driven by a sprocket linkage connected to an axle of the front rollers, and a stylus which engages the chart paper and is mounted on an end of the lever such that deflection of the follower causes the stylus to move relative to the coil of chart paper to discribe a trace thereon. The profile measuring apparatus is hand-held and is moved across the surface such that the follower is raised or lowered as the distance from the surface to the frame changes between the front and rear rollers and a trace is generated which reflects the changes.
REFERENCES:
patent: 2620655 (1952-12-01), Priest
patent: 3453877 (1969-07-01), Anderson
patent: 3540270 (1970-11-01), Wolfer
patent: 4288926 (1981-09-01), Long
Swisher S. Clement
The Mead Corporation
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