US3862408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for mean value indication
Assignee: Mpac Group PLC
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Filing: 1972-11-14
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Granted: 1975-01-21
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Expires: 1992-11-14
Abstract
Abstract This invention is mainly concerned with the checking of the masses of tobacco in individual cigarettes produced on a continuous-rod cigarette making machine. The signal from a Betaray scanning device (which is indicative of the mass of tobacco in a given portion of the continuous rod) is compared with a reference signal equivalent to an acceptable mass. The device is formed by an integrator; an input circuit for the integrator to receive both the continuously varying voltage from the Beta-ray device and the reference voltage, and to deliver to the integrator a voltage which at any instant is proportional to the algebraic sum of the two input voltages; a level discriminator connected to the output of the integrator; a normally-closed gate connected to the output of the discriminator; and a source of pulses for opening the gate briefly at the end of a defined period which corresponds to that portion of the continuous rod which will after cut-off constitute a cigarette, the source of pulses also being arranged to reset the integrator to zero immediately after completion of each brief opening of the gate. A memory device operates a rejection device to reject individual cigarettes which contain portions of the continuous rod having unacceptable masses.
Inventors
- 👤 Reginald Charles Bolt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:13
CPC Classifications
G; G07; G07C; G07C3/00; G07C3/14; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/16585; Y; Y10; Y10S; Y10S131/00; Y10S131/905; Y10S131/908
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
162 words
A device for producing an indication whenever the mean value over each of a succession of defined periods of a continuously varying voltage is beyond a selected limit, said device comprising an integrator, input circuit means for said integrator connected to receive both said continuously varying voltage and a reference voltage representing said selected limit to deliver continuously to said integrator a voltage which at any instant is proportional to the algebraic sum of the two received voltages, a level discriminator connected to the output of said integrator, a normally closed two-input AND gate having one input connected to the output of said discriminator, and a source of electric pulses connected to the other input of said gate to open said gate briefly at the end of each of said defined periods, and reset means connected to said source of electric pulses and to said integrator to reset said integrator to zero immediately after completion of each brief opening of said gate.
Claim 2
Independent Claim
162 words
A device for producing an indication whenever the mean value over each of a succession of defined periods of a continuously varying voltage is beyond a selected limit, said device comprising an integrator, input circuit means for said integrator connected to receive both said continuously varying voltage and a reference voltage representing said selected limit to deliver continuously to said integrator a voltage which at any instant is proportional to the algebraic sum of the two received voltages, a level discriminator connected to the output of said integrator, a normally closed two-input AND gate having one input connected to the output of said discriminator, and a source of electric pulses connected to the other input of said gate to open said gate briefly at the end of each of said defined periods, and reset means connected to said source of electric pulses and to said integrator to reset said integrator to zero immediately after completion of each brief opening of said gate.
Claim 3
Dependent Claim
51 words
A device as claimed in claim 1, wherein said reset means comprises reset switch means connected to said integrator and responsible to an electric pulse from said source of electric pulses to reset the integrator to zero and a delay circuit connected between the pulse source and the reset switch means.
Claim 4
Dependent Claim
70 words
A device as claimed in claim 1, wherein said input circuit means comprises a first resistor connected between a first input terminal and the input of said integrator and a second resistor connected between a second input terminal and the input of said integrator, said first input terminal being connected to continuously receive said continuously varying voltage and said second input terminal being connected to continuously receive said reference voltage.
Claim 5
Dependent Claim
38 words
A device as claimed in claim 1 wherein said discriminator has a pair of inputs, one of the inputs of said discriminator being connected to the output of said integrator and the other input being connected to ground.
Claim 6
Independent Claim
145 words
A device for indicating whenever the mean value over each of a succession of defined periods of a continuously varying voltage deviates from a selected limit, comprising input circuit means for continuously adding said continuously varying voltage and a reference voltage representing said selected limit, an integrator having an input connected to the output of said input circuit means, a discriminator having a first input connected to the output of said integrator and a second input connected to ground, gating means for selectively connecting the output of said discriminator to an output terminal of the device, pulse control means connected to said gating means to operate said gating means briefly at the end of each of said defined periods, and reset means connected to said pulse control means and said integrator to reset said integrator to zero immediately after each operation of said gating means.
Claim 7
Independent Claim
145 words
A device for indicating whenever the mean value over each of a succession of defined periods of a continuously varying voltage deviates from a selected limit, comprising input circuit means for continuously adding said continuously varying voltage and a reference voltage representing said selected limit, an integrator having an input connected to the output of said input circuit means, a discriminator having a first input connected to the output of said integrator and a second input connected to ground, gating means for selectively connecting the output of said discriminator to an output terminal of the device, pulse control means connected to said gating means to operate said gating means briefly at the end of each of said defined periods, and reset means connected to said pulse control means and said integrator to reset said integrator to zero immediately after each operation of said gating means.
Claim 8
Dependent Claim
70 words
A device as claimed in claim 5, wherein said input circuit means comprises a first resistor connected between a first input terminal and the input of said integrator and a second resistor connected between a second input terminal and the input of said integrator, said first input terminal being connected to continuously receive said continuously varying voltage and said second input terminal being connected to continuously receive said reference voltage.
Claim 9
Dependent Claim
28 words
A device as claimed in claim 5, wherein said pulse control means comprises a source of electric pulses coincident with the end of each of said defined periods.
Claim 10
Dependent Claim
51 words
A device as claimed in claim 7, wherein said reset means comprises reset switch means connected to said integrator and responsive to an electric pulse from said source of electric pulses to reset the integrator to zero and a delay circuit connected between the pulse source and the reset switch means.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |