Geometrical instruments – Distance measuring – Opposed contacts
Patent
1991-11-14
1992-09-29
Haroian, Harry N.
Geometrical instruments
Distance measuring
Opposed contacts
33549, 33783, G01B 508
Patent
active
RE0340782
ABSTRACT:
The apparatus of this invention comprises parallel table surface portions with an elongated slot therebetween. A carriage mean is mounted below the two table surfaces and has an upstanding pin extending therefrom and extending into the slot and slightly above the table surface. A spring extending from a support arm through which the pin extends and a washer affixed to the pin normally causes the pin to be in its uppermost protruding position. A lever is affixed to the lower end of the pin to compress the spring to cause the pin to retract within the slot. An elongated straight gauge member extneds across the table surface portions to serve as a measuring reference point. The method of this invention comprises the steps of withdrawing the pin from its protruding position, laying the plate to be measured on the table surface, moving the retracted pin within the elongated slot to the measuring position whether that be from an aperture in the plate or the opposite end of the plate, extending the pin either into the aperture or adjacent the far end of the plate, actuating the measuring device, and then if necessary, retracting the pin and moving it to a second measuring position.
REFERENCES:
patent: 1488818 (1924-04-01), Johansson et al.
patent: 1671737 (1928-05-01), Norton
patent: 3978589 (1976-09-01), Courtepatte
patent: 4208796 (1980-06-01), Michaud
patent: 4366623 (1983-01-01), Bergqvist
Precision Measuring Table-Lee Machine & Mfg. Inc.
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