US3863152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for use in connection with electric measured values indicators, especially electromechanical scales
Assignee: Minebea Intec Aachen GmbH and Co KG
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Filing: 1973-02-07
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Granted: 1975-01-28
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Expires: 1993-02-07
Abstract
Abstract A measuring device, such as a weighing scale emits a direct current voltage signal which is supplied through a filter to a receiver. The filter suppresses alternating current carried by the voltage signal and thereby introduces a delay in the voltage signal supplied to the receiver. To speed up the signal, the signal is differentiated and the resulting pulse is employed to close a switch which is in parallel with the filter thereby substantially eliminating the delay caused by the filter.
Inventors
- 👤 Peter Wernitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:08
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/18; G01G23/36; G01G23/06; G01G23/10; G11; G11C; G11C27/00; G11C27/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
In combination with an electric circuit for conveying direct current voltage values corresponding to quantities to be measured to a receiver while suppressing alternating current voltages; measuring means operable for developing a direct current voltage signal which varies in conformity with the quantity measured and having an output terminal, a receiver adapted for actuation by the said direct current voltage signal and having an input terminal, a filter connecting said output terminal to said input terminal and operable only temporary to suppress alternating current interference appearing with said direct current voltage signal, a normally nonconductive switch connected in parallel with said filter, and measuring differentiation control means operable in response to a change in said direct current voltage signal in at least one direction for making said switch conductive only during substantially the entire period of time over which said change takes place.
Claim 2
Dependent Claim
143 words
In combination with an electric circuit for conveying direct current voltage values corresponding to quantities to be measured to a receiver while suppressing alternating current voltages; measuring means operable for developing a direct current voltage signal which varies in conformity with the quantity measured and having an output terminal, a receiver adapted for actuation by the said direct current voltage signal and having an input terminal, a filter connecting said output terminal to said input terminal and operable only temporary to suppress alternating current interference appearing with said direct current voltage signal, a normally nonconductive switch connected in parallel with said filter, and measuring differentiation control means operable in response to a change in said direct current voltage signal in at least one direction for making said switch conductive only during substantially the entire period of time over which said change takes place.
Claim 3
Dependent Claim
34 words
An electric circuit in combination according to claim 1 in which said control means comprises a differentiator to which said direct current voltage signal is applied and switch actuating means connected to said differentiator.
Claim 4
Dependent Claim
111 words
An electric circuit in combination according to claim 1 in which said switch has a control terminal sensitive to a control signal to actuate the switch into conductive condition, said control means comprising a differentiator in the form of a capacitor having one side connected to receive said direct current voltage signal and a resistor connected to the other side of said capacitor, an amplifier having an input terminal connected to the resistor side of said capacitor and having an output terminal, and a monostable multivibrator having a trigger terminal connected to the output terminal of said amplifier and having an output side connected to said control terminal of said switch.
Claim 5
Dependent Claim
53 words
An electric circuit in combination according to claim 3 in which said receiver comprises a signal controlled input gate, and a further monostable multivibrator having a trigger terminal connected to the said output side of the first mentioned monostable multivibrator and having an output side connected to supply signals to said input gate.
Claim 6
Dependent Claim
34 words
An electric circuit in combination according to claim 4 which includes time delay means interposed between the output side of said first mentioned monostable multivibrator and the trigger terminal of said further monostable multivibrator.
References Cited (Backward Citations)
US2421578A
Cited
US2567688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |