Gauging apparatus

Claim 2

Apparatus for measuring the angular offset of one portion of an article relative to another portion of said article comprising: a base member, means for supporting said article and for placing the apex of the angular offset thereof in a particular position, two displacement-sensitive transducers mounted on said base member so as to sense the positions of two points lying on said another portion; a third displacement-sensitive transducer mounted on said base member as to sense the position of a point lying on said one portion; a first comparator means for computing the difference between the outputs of the first two said transducers; a second comparator means for computing the difference between the outputs of said third transducer and the first said comparator means; and a calibrator means for compensating for the arithmetic influence of the relative displacement of the transducers in accordance with the trigonometric relation of said sensed points.

Claim 3

Apparatus for measuring the angular offset of one portion of an article relative to another portion of said article comprising: a base member, means for supporting said article and for placing the apex of the angular offset thereof in a particular position, two displacement-sensitive transducers mounted on said base member so as to sense the positions of two points lying on said another portion; a third displacement-sensitive transducer mounted on said base member as to sense the position of a point lying on said one portion; a first comparator means for computing the difference between the outputs of the first two said transducers; a second comparator means for computing the difference between the outputs of said third transducer and the first said comparator means; and a calibrator means for compensating for the arithmetic influence of the relative displacement of the transducers in accordance with the trigonometric relation of said sensed points.

Claim 4

Apparatus for measuring the angular offset of one portion of an article relative to another portion of said article comprising: a base member, means for supporting said article and for placing the apex of the angular offset thereof in a particular position, two displacement-sensitive transducers mounted on said base member so as to sense the positions of two points lying on said another portion; a third displacement-sensitive transducer mounted on said base member as to sense the position of a point lying on said one portion; a first comparator means for computing the difference between the outputs of the first two said transducers; a second comparator means for computing the difference between the outputs of said third transducer and the first said comparator means; and a calibrator means for compensating for the arithmetic influence of the relative displacement of the transducers in accordance with the trigonometric relation of said sensed points.

Claim 5

Apparatus as claimed in claim 1 wherein said means for supporting said article and for placing the Apex of said angular offset of said article in a particular position comprises reference structure against which said article is positioned during measurement of said angular offset, said structure being movable in a direction perpendicular to said apex.

Claim 6

Apparatus as claimed in claim 1 and further comprising an indicator for displaying the output of said second comparator means as an indication of the angular offset of said one portion relative to said another portion.

Claim 7

Apparatus as claimed in claim 3 wherein said indicator includes an ammeter whose scale is marked in degrees of angle for displaying the magnitude of said angular offset.

Claim 8

Apparatus as claimed in claim 3 wherein said transducers provide electrical output signals, said comparator means and calibrator means respond to electrical input signals and provide electrical output signals and said indicator responds to an electrical input signal.

Claim 9

Apparatus as claimed in claim 1 wherein said transducers are of the electromechanical type which respond to mechanical displacement and provide electrical output signals.

Claim 10

Apparatus as claimed in claim 1 wherein each said comparator means includes two matched transformers, the primary windings of which serve as inputs and the secondary windings of which are connected together in series to provide an output signal.

Claim 11

Apparatus as claimed in claim 1 wherein said calibrator means includes an attenuation potentiometer and an amplifier both connected between the output of said first comparator means and one input of said second comparator means.

Claim 12

Apparatus as claimed in claim 1 wherein said transducers are of the low-voltage differential-transformer type.

Claim 13

Apparatus as claimed in claim 9 wherein each said comparator means includes two matched transformers, the primary windings of which serve as inputs and the secondary windings of which are connected together in series to provide an output signal; and wherein said calibrator includes an attenuation potentiometer and an amplifier both connected between the output of the said first comparator means and one input of said second comparator means; and wherein said indicator includes an ammeter whose scale is marked in degrees of angle for displaying the magnitude of said angular offset; said apparatus further comprising potentiometer means for zero adjusting the outputs of said transducers, amplifier means for boosting the output signals of said transducers and said comparator means, variable resistor means for matching the gains of said transducers and their respective amplifier means, and a variable resistor in series with said ammeter for adjusting the overall gain of said apparatus and thereby calibrating the range of said ammeter.

Claim 14

Apparatus as claimed in claim 10 wherein said means for supporting said article and for placing the apex of said angular offset of said article in a particular position comprises reference structure against which said article is positioned during measurement of said angular offset said means for supporting said article being movable in a direction parallel to said apex.

Claim 15

Apparatus as claimed in claim 10 wherein said means for supporting said article and placing the apex of the angular offset of said article in a particular position includes an optical system mounted on said base member for indicating when said apex is aligned with the axis of said optical system means for supporting said article with respect to said base Memtical system movable with respect to said base member for placing said article supported on said means for supporting said article in predetermined relation to said optical system.