US3601615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric apparatus for detecting minute variation in time-functional luminous energy
Assignee: Individual
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Filing: 1969-10-09
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Granted: 1971-08-24
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Expires: 1989-10-09
Abstract
Abstract Time-functional variations in the thickness of a lengthwisely advancing linear article are photoelectrically sensed in succession and converted into an electrical signal for actuating a terminal mechanical means operative for the article''s advancing system, which signal is passed through a system substantially including a differential amplifier, a waveform converter, an integrator, a differentiator and a monostable circuit, connected in this order. The resultant electrical signal may be negatively fed back for control of the luminous source for better stabilization of an amplifier circuit.
Inventors
- 👤 Seizi Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:36
CPC Classifications
B; B65; B65H; B65H63/00; B65H63/06; B65H63/062; B65H63/065; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
300 words
An electric apparatus for detecting a minute time-functional variation of luminous energy comprising (a) a source of luminous energy, (b) photoelectric cell means disposed facing said luminous source in a slightly spaced relationship therewith for allowing the insertion of a linear article for advancement longitudinally therebetween, said photoelectric cell means being for generating an electric output signal corresponding to a lengthwise dimensional irregularity of said linear article, (c) a differential circuit having an output terminal and first and second input terminal means, said first input terminal means being connected to said photoelectric cell and said second input terminal means being for connection to a first reference signal, and said differential circuit having means for comparing said electric output signal of said photoelectric cell with said first reference signal to produce a differential output signal at said output terminal, (d) first waveform converter circuit means connected to said differential circuit output terminal for converting said output signal of said differential circuit into a corresponding first square-wave output signal, (e) an integrating circuit connected to said first waveform converter circuit means for receiving and integrating said square-wave output signal to produce a triangular-wave output signal, (f) second waveform converter cIrcuit means connected to said integrating circuit and including means for comparing said triangular-wave output signal with a second reference signal for producing a second square-wave output signal in response to said comparison, (g) a differentiating circuit connected to said second waveform converter circuit for differentiating said square-wave output signal into a corresponding differentiated output signal, (h) a monostable multivibrator circuit connected to said differentiating circuit for producing a corresponding output signal and (i) mechanical means having electrical actuating means connected to said monostable circuit for controlling said advance of said linear article upon receipt of said output signal of said monostable circuit.
Claim 2
Dependent Claim
300 words
An electric apparatus for detecting a minute time-functional variation of luminous energy comprising (a) a source of luminous energy, (b) photoelectric cell means disposed facing said luminous source in a slightly spaced relationship therewith for allowing the insertion of a linear article for advancement longitudinally therebetween, said photoelectric cell means being for generating an electric output signal corresponding to a lengthwise dimensional irregularity of said linear article, (c) a differential circuit having an output terminal and first and second input terminal means, said first input terminal means being connected to said photoelectric cell and said second input terminal means being for connection to a first reference signal, and said differential circuit having means for comparing said electric output signal of said photoelectric cell with said first reference signal to produce a differential output signal at said output terminal, (d) first waveform converter circuit means connected to said differential circuit output terminal for converting said output signal of said differential circuit into a corresponding first square-wave output signal, (e) an integrating circuit connected to said first waveform converter circuit means for receiving and integrating said square-wave output signal to produce a triangular-wave output signal, (f) second waveform converter cIrcuit means connected to said integrating circuit and including means for comparing said triangular-wave output signal with a second reference signal for producing a second square-wave output signal in response to said comparison, (g) a differentiating circuit connected to said second waveform converter circuit for differentiating said square-wave output signal into a corresponding differentiated output signal, (h) a monostable multivibrator circuit connected to said differentiating circuit for producing a corresponding output signal and (i) mechanical means having electrical actuating means connected to said monostable circuit for controlling said advance of said linear article upon receipt of said output signal of said monostable circuit.
Claim 3
Dependent Claim
56 words
An electric apparatus as claimed in claim 4, further comprising first, second, third and fourth amplifier circuit means inserted respectively between said photoelectric cell and said differential circuit, between said differential circuit and said first waveform converter circuit means, between said differentiation circuit and said monostable circuit, and between said monostable circuit and said mechanical means.
Claim 4
Dependent Claim
97 words
An electric apparatus as claimed in claim 4, further characterized in that said luminous source is provided with a negative feedback circuit comprising (a) a first transistor having a base electrode connected to said photoelectric cell, (b) a second transistor having a base electrode connected to a collector electrode of said first transistor, (c) a third transistor having a base electrode connected to a collector electrode of said second transistor and an emitter electrode connected to said luminous source, (d) and a capacitor of large capacity inserted between said base and collector electrodes of said second transistor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |