Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
198 words
A device for measuring displacement of a graduated scale, by counting its graduations moving past a detecting position, comprising, in combination, plural scales, having respective different pitches Between their graduations, movable in unison past a graduation detecting position; plural graduation detector means at said graduation detecting position each operatively associated with a different respective scale; at least one of said scales having fine graduations arranged successively in groups each including the same number of fine graduations, and at least another of said scales having coarse graduations each corresponding to a respective group of said fine graduations; a counter having plural digit positions; and switching means connecting said detector means to said counter and operable, responsive to movement of said scales past said graduation detecting position at a relatively low speed, to supply, to the low digit position of said counter, input signals from the detector means operatively associated with said at least one scale, and operable, responsive to movement of said scales past said graduation detecting position at a relatively higher speed, to supply, to a higher digit position of said counter, input signals from the detector means operatively associated with said at least another of said scales.
Claim 2
Independent Claim
198 words
A device for measuring displacement of a graduated scale, by counting its graduations moving past a detecting position, comprising, in combination, plural scales, having respective different pitches Between their graduations, movable in unison past a graduation detecting position; plural graduation detector means at said graduation detecting position each operatively associated with a different respective scale; at least one of said scales having fine graduations arranged successively in groups each including the same number of fine graduations, and at least another of said scales having coarse graduations each corresponding to a respective group of said fine graduations; a counter having plural digit positions; and switching means connecting said detector means to said counter and operable, responsive to movement of said scales past said graduation detecting position at a relatively low speed, to supply, to the low digit position of said counter, input signals from the detector means operatively associated with said at least one scale, and operable, responsive to movement of said scales past said graduation detecting position at a relatively higher speed, to supply, to a higher digit position of said counter, input signals from the detector means operatively associated with said at least another of said scales.
Claim 3
Dependent Claim
96 words
A device for measuring displacement of a graduated scale, as claimed in claim 1, including scale speed detecting means operable to detect the speed of movement of said scales past said graduation detecting position; and means interconnecting said speed detecting means and said switching means and effective to control said switching means to switch the supply of input signals between said low digit position and said higher digit position of said counter responsive to detection of a change in the speed of movement of said scales between said relatively low speed and said relatively high speed.
Claim 4
Dependent Claim
84 words
A device for measuring displacement of a graduated scale, as claimed in claim 2, including control means for said switching means interposed between said speed detecting means and said switching means and operable to detect coincidence between a selected fine graduation and a corresponding coarse graduation; said control means delaying switching of said input signals between said low digit position and said higher digit position, responsive to detection of a speed change by said speed detecting means, until said control means detects such coincidence.
Claim 5
Dependent Claim
86 words
A device for measuring displacement of a graduated scale, as claimed in claim 3, in which each group of fine graduations of said at least one scale includes a distinctive fine graduation aligned with a respective coarse graduation of said at least another scale; said control means operating to switch the supply of input signals between said low digit position and said higher digit position, following detection of a speed change, responsive only to simultaneous detection of a distinctive fine graduation and the associated coarse graduation.
Claim 6
Dependent Claim
47 words
A device for measuring displacement of a graduated scale, as claimed in claim 4, in which each distinctive fine graduation is elongated relative to the other fine graduations in its respective group; said control means including a respective detector means operatively associated with said elongated fine graduations.
Claim 7
Dependent Claim
32 words
A device for measuring displacement of a graduated scale, as claimed in claim 3, including a scale bearing member; said plural scales being arranged in parallel relation on said scale bearing member.
Claim 8
Dependent Claim
91 words
A device for measuring displacement of a graduated scale, as claimed in claim 6, in which the fine graduations of said at least one scale are arranged successively in groups of ten, with one tenth fine graduation being elongated relative to the other fine graduations; said detector means including a first detector means operable to detect said fine graduations, a second detector means operable to detect said coarse graduations, and a third detector means operable to detect each tenth fine graduation; said third detector means being included in said control means.