Geometrical instruments – Distance measuring – Opposed contacts
Patent
1992-07-31
1994-03-15
Will, Thomas B.
Geometrical instruments
Distance measuring
Opposed contacts
3350104, 33542, G01B 514
Patent
active
052936953
ABSTRACT:
The present invention instrument measures the differential distances between two adjacent surfaces. To accomplish this end, the instrument has a main body to which there is pivotally coupled a U frame whose arms extend at an angle from its base, so that as the former is pivoted in one direction, the latter will correspondingly pivot in an opposite direction. Contact points are provided to the arms and the bottom surface of the body, and the base of the U frame is biased by a spring loaded slidable element within the body which in turn is connected to a transducer. Thus, as the instrument is moved between two adjacent surfaces, the lower and upper contacts having previously been adjusted to maintain contact with the respective lower and upper surfaces, any deviation in the space between the two being measured adjacent surfaces would cause the U frame to pivotally move. Such pivotal movement by the U frame is translated to the slidable element, and converted by the transducer into a corresponding electrical signal. A user can thus quickly ascertain from a readout of the signal any relative spatial differences between the two being measured adjacent surfaces. Also, by using known calibration standards, the present invention can be used to measure absolute dimensions as well as differential distances.
REFERENCES:
patent: 2134262 (1938-10-01), Phillips
patent: 3418720 (1968-12-01), Worthen
patent: 3780442 (1973-12-01), Gresho
patent: 3789511 (1974-02-01), Groom et al.
patent: 4045877 (1977-09-01), Rutter
patent: 4087918 (1978-05-01), Schmid et al.
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patent: 4190961 (1980-03-01), James et al.
patent: 4395827 (1983-08-01), Stowe et al.
patent: 4419830 (1983-12-01), Miller
patent: 4694585 (1987-09-01), Frizot et al.
patent: 5063687 (1991-11-01), Olshefsky
Equipment Development Services
Will Thomas B.
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