US3636641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiological training device
Assignee: Individual
•
Filing: 1969-04-07
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Granted: 1972-01-25
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Expires: 1989-04-07
Abstract
Abstract There is disclosed a training device for simulating the action of a nuclear radiation detector. A transmitter emits a singlefrequency RF signal in the VHF frequency range. The simulated detector is a radio receiver having a voltage-controlled multivibrator with an output to a meter and a headset. Thus, audible clicks are produced whose repetition rate varies inversely with the distance from the transmitter. The use of a VHF frequency results in the simulated field being distorted by reflection from surrounding terrain.
Inventors
- 👤 Samuel W Daskam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:45
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/54; G09; G09B; G09B9/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
Radiation detection training apparatus which comprises: a VHF radio transmitter; antenna means remotely positioned from said transmitter for producing a first signal having a signal strength proportional to the energy level received from said transmitter; and means for receiving said first signal and producing a pulsed output signal, the pulse rate of said output signal being proportional to the signal strength of said first signal.
Claim 2
Dependent Claim
65 words
Radiation detection training apparatus which comprises: a VHF radio transmitter; antenna means remotely positioned from said transmitter for producing a first signal having a signal strength proportional to the energy level received from said transmitter; and means for receiving said first signal and producing a pulsed output signal, the pulse rate of said output signal being proportional to the signal strength of said first signal.
Claim 3
Dependent Claim
19 words
The apparatus of claim 1 wherein said means for producing a pulsed output signal comprises a voltage controlled multivibrator.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 wherein said means for producing a first signal is a detector.
Claim 5
Dependent Claim
17 words
The apparatus of claim 3 wherein said means for producing an output signal comprises a voltage-controlled multivibrator.
Claim 6
Dependent Claim
19 words
The apparatus of claim 3 additionally comprising a meter responsive to said first signal to give a visual readout.
Claim 7
Dependent Claim
68 words
The apparatus of claim 1 wherein said antenna means comprises a receiving antenna, a resonant circuit receiving the antenna output, and a detector for converting the output of said resonant circuit to a DC signal; and wherein said output signal producing means comprises a voltage controlled multivibrator connected to receive said DC signal, and sound producing means for emitting audible clicks in response to pulses from said multivibrator.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |