US3576440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse circuit for radiac sets
Assignee: Individual
•
Filing: 1969-04-10
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Granted: 1971-04-27
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Expires: 1989-04-10
Abstract
Abstract In a G. M. radiac set which has a multivibrator meter circuit having an ammeter between the bistable switchable elements, a pulse generator for providing a periodic feed through pulse to the G.M. tube. The feed through pulse is added to a tube pulse only when they occur simultaneously, to provide a high amplitude counting pulse for the meter circuit.
Inventors
- 👤 Robert E Jehle
- 👤 David P Helm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:53
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
90 words
A radiac set comprising: a Geiger-Muller tube having a cathode and an anode, a source of high voltage, a first resistor, a source of repetitive periodic pulses having an output terminal, first electrical means connecting in series said resistor, said voltage source, said pulse source, said anode, and said cathode, means for indicating the number of pulses per time whose amplitude is in excess of the amplitude of said periodic pulses, and having an input terminal and an indicator, and second electrical means connecting said cathode to said input terminal.
Claim 2
Dependent Claim
90 words
A radiac set comprising: a Geiger-Muller tube having a cathode and an anode, a source of high voltage, a first resistor, a source of repetitive periodic pulses having an output terminal, first electrical means connecting in series said resistor, said voltage source, said pulse source, said anode, and said cathode, means for indicating the number of pulses per time whose amplitude is in excess of the amplitude of said periodic pulses, and having an input terminal and an indicator, and second electrical means connecting said cathode to said input terminal.
Claim 3
Dependent Claim
23 words
The radiac set according to claim 1 wherein said means for indicating is a multivibrator having a meter for detecting the switching thereof.
Claim 4
Dependent Claim
17 words
The radiac set according to claim 2 wherein said source of repetitive pulses is a relaxation oscillator.
Claim 5
Dependent Claim
23 words
The radiac set according to claim 1 wherein said means for indicating is a binary-indicator circuit having a pair of bistable switchable elements.
Claim 6
Dependent Claim
30 words
The radiac set according to claim 4 further including third electrical means connecting said output terminal of said pulse source and said binary-indicator circuit for providing a reset signal thereto.
Claim 7
Dependent Claim
25 words
The radiac set according to claim 5 further including a pulse shaper interposed between said binary-indicator circuit and said output terminal of said pulse source.
References Cited (Backward Citations)
US2672561A
Cited
US2876360A
Cited
US2824237A
Cited
US3012140A
Cited
US3319066A
Cited
US3366791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |