US3901606A
Expired / Lapsed
US
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Non-contact type dimension measuring device
Assignee: Daido Steel Co Ltd
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Filing: 1973-12-17
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Granted: 1975-08-26
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Expires: 1993-12-17
Abstract
Abstract Disclosed is a non-contact type dimension measuring device which comprises a light source for projecting collimated rays to an object to be measured, a convex lens for receiving the rays which are not screened by the object, to cause the rays to converge at its focal point, a first screen plate having a slit located at the focal point of the convex lens, a second screen plate having a large number of photoelectric converter elements arranged one one surface thereof on which surface an magnified image of the object is formed by the rays passing through the slit of the first screen plate, and an operational circuit responsive to electric signals from the photoelectric converter elements for determining the dimension of the object.
Inventors
- 👤 Kazuo Watanabe
- 👤 Masasi Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:46
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/08; G01B11/10; G01B11/105
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
112 words
A non-contact type dimension measuring device comprising: a first optical system for projecting collimated rays onto an object to be measured; a screen means having a plurality of photoelectric converter elements arranged in a plane; a second optical system for producing an image of said object on said screen means; and an operational circuit responsive to signals representing the size of said magnified image from said photoelectric converter elements for calculating the dimension of said object; means for repeatedly vibrating said object; and a second operational circuit repeatedly receiving signals indicative of the measured value of the dimension of the object from said first operational circuit for caluculating an average value thereof.
Claim 2
Dependent Claim
112 words
A non-contact type dimension measuring device comprising: a first optical system for projecting collimated rays onto an object to be measured; a screen means having a plurality of photoelectric converter elements arranged in a plane; a second optical system for producing an image of said object on said screen means; and an operational circuit responsive to signals representing the size of said magnified image from said photoelectric converter elements for calculating the dimension of said object; means for repeatedly vibrating said object; and a second operational circuit repeatedly receiving signals indicative of the measured value of the dimension of the object from said first operational circuit for caluculating an average value thereof.
Claim 3
Dependent Claim
32 words
A non-contact type dimension measuring device according to claim 1, wherein said first optical system has a light source and a converging lens having a foCal point located on said light source.
Claim 4
Dependent Claim
48 words
A non-contact type dimension measuring device according to claim 1, wherein said second optical system has a converging lens between which and said first optical system the object to be measured is positioned, and a screen having a slit located at the rear focal point of said lens.
Claim 5
Dependent Claim
249 words
A non-contact type dimension measuring device according to claim 1, wherein said first operational circuit comprises: a plurality of amplifiers each connected to the output of each of the photoelectric converter elements; a plurality of first AND gate each having one input connected to the output of each of said amplifiers; a pulse generater for simultaneously supplying a pulse signal to the other input of each of said first AND gates; a plurality of registers each having a input connected to the reverse output of each of said first AND gates; a plurality of second AND gates each having one input connected to the output of each of said registers; a sequential pulse generater having a plurality of outputs each connected the other input of each of said second AND gates; an OR gate having a plurality of input each connected to the output of each of said second AND gates; and a counter connected to the output of said OR gate, and wherein the second operational circuit comprises; a plurality of AND gates one input of each of which is connected to one of the digits of said counter of said first operational circuit excepting at least the least significant digit; a pulse generater for periodically supplying a pulse signal to the other input of each of said AND gates; a counter connected to the output of each of said AND gates; and a display means connected to said counter for periodically displaying an average value of measurement.
Claim 6
Dependent Claim
233 words
A non-contact type dimension measuring device comprising: a first optical system for projecting collimated rays onto an object to be measured; a screen means having a plurality of photoelectric converter elements arranged in a plane; a second optical system for producing an image of said object on said screen means; and an operational circuit responsive to signals representing the size of said magnified image from said photoelectric converter elements for calculating the dimension of said object, said operational circuit comprising: a plurality of amplifiers each connected to the output of each of the photoelectric converter elements; a plurality of first AND gate each having one input connected to the output of each of said amplifiers; a pulse generater for simultaneously supplying a pulse signal to the other input of each of said first AND gates; a plurality of registers each having an input connected to the reverse output of each of said first AND gates; a plurality of second AND gates each having one input connected to the output of each of said registers; a sequential pulse generator having a plurality of outputs each connected the other input of each of said second AND gates; an OR gate having a plurality of inputs each connected to the output of each of said second AND gates; a counter connected to the output of said OR gate; and a display means connected to said counter.
Claim 7
Dependent Claim
233 words
A non-contact type dimension measuring device comprising: a first optical system for projecting collimated rays onto an object to be measured; a screen means having a plurality of photoelectric converter elements arranged in a plane; a second optical system for producing an image of said object on said screen means; and an operational circuit responsive to signals representing the size of said magnified image from said photoelectric converter elements for calculating the dimension of said object, said operational circuit comprising: a plurality of amplifiers each connected to the output of each of the photoelectric converter elements; a plurality of first AND gate each having one input connected to the output of each of said amplifiers; a pulse generater for simultaneously supplying a pulse signal to the other input of each of said first AND gates; a plurality of registers each having an input connected to the reverse output of each of said first AND gates; a plurality of second AND gates each having one input connected to the output of each of said registers; a sequential pulse generator having a plurality of outputs each connected the other input of each of said second AND gates; an OR gate having a plurality of inputs each connected to the output of each of said second AND gates; a counter connected to the output of said OR gate; and a display means connected to said counter.
Claim 8
Dependent Claim
76 words
A non-contact type dimension measuring device according to claim 5, wherein said operational circuit further comprises Schmitt trigger circuits having at least two different threshold values, inputs of at least two Schmitt trigger circuits having threshold values different from one another being connected to the output of each of said amplifiers, and an output of each of said at least two Schmitt trigger circuits being connected to the output of each of said first AND gates.
Claim 9
Dependent Claim
343 words
A non-contact type dimension measuring device comprising: a first optical system for projecting collimated rays onto an object to be measured; a screen means having a pluralIty of photoelectric converter elements arranged in a plane; a second optical system for producing an image of said object on said screen means; a first operational circuit responsive to signals representing the size of said magnified image from said photoelectric converter elements for calculating the dimension of said object, and a second operational circuit repeatedly receiving signals indicative of the measured value of the dimension of the object from said first operational circuit for calculating an average value thereof, said first operational circuit comprising: a plurality of amplifiers each connected to the output of each of the photoelectric converter elements; a plurality of first AND gates each having one input connected to the output of each of said amplifiers; a pulse generator for simultaneously supplying a pulse signal to the other input of each of said first AND gates; a plurality of registers each having an input connected to the reverse output of each of said AND gates; a plurality of second AND gates each having one input connected to the output of each of said registers; a sequential pulse generator having a plurality of outputs each connected the other input of each of said second AND gates; an OR gate having a plurality of inputs each connected to the output of each of said second AND gates; and a counter connected to the output of said OR gate, and wherein the second operational circuit comprises: a plurality of AND gates one input of each of which is connected to one of the digits of said counter of said first operational circuit excepting at least the least significant digit; a pulse generator for periodically supplying a pulse signal to the other input of each of said AND gates; a counter connected to the output of each of said AND gates; and a display means connected to said counter for periodically displaying an average value of measurement.
Claim 10
Dependent Claim
343 words
A non-contact type dimension measuring device comprising: a first optical system for projecting collimated rays onto an object to be measured; a screen means having a pluralIty of photoelectric converter elements arranged in a plane; a second optical system for producing an image of said object on said screen means; a first operational circuit responsive to signals representing the size of said magnified image from said photoelectric converter elements for calculating the dimension of said object, and a second operational circuit repeatedly receiving signals indicative of the measured value of the dimension of the object from said first operational circuit for calculating an average value thereof, said first operational circuit comprising: a plurality of amplifiers each connected to the output of each of the photoelectric converter elements; a plurality of first AND gates each having one input connected to the output of each of said amplifiers; a pulse generator for simultaneously supplying a pulse signal to the other input of each of said first AND gates; a plurality of registers each having an input connected to the reverse output of each of said AND gates; a plurality of second AND gates each having one input connected to the output of each of said registers; a sequential pulse generator having a plurality of outputs each connected the other input of each of said second AND gates; an OR gate having a plurality of inputs each connected to the output of each of said second AND gates; and a counter connected to the output of said OR gate, and wherein the second operational circuit comprises: a plurality of AND gates one input of each of which is connected to one of the digits of said counter of said first operational circuit excepting at least the least significant digit; a pulse generator for periodically supplying a pulse signal to the other input of each of said AND gates; a counter connected to the output of each of said AND gates; and a display means connected to said counter for periodically displaying an average value of measurement.
References Cited (Backward Citations)
US3562500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |