Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1990-01-31
1991-07-16
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
33784, G01N 308
Patent
active
050314645
ABSTRACT:
An apparatus for determining the thickness of wads of papers (A) in connection with their binding within a cover, comprises an automatically released compressing device (2), which indicates, on a display, a required thickness value. The apparatus can be entirely mechanical, but is preferably provided with an electronic control circuit and an electric solenoid drive circuit. On insertion in a receiver (1), the wad of papers (A) actuates an electro-optical switch (D2, Q2) which energizes the solenoid (9), the armature (10) of which compresses the wad of papers (A). During the compressing movement, pulses received from two reading device (6, 13) are counted, the total number of pulses representing a measure of the required thickness value.
REFERENCES:
patent: 4419824 (1983-12-01), Oberhans
patent: 4767250 (1988-08-01), Garlichs
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