Patent US3719824A successfully refreshed from Google Patents.
US3719824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse x-ray with pulse field enhancement of film response
Assignee: The Ohio State University
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Filing: 1971-06-08
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Granted: 1973-03-06
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Expires: 1991-06-08
Abstract
Abstract Apparatus to enhance the speed of radiographic exposures utilizing pulse X-ray generators of the stacked piezoelectric assembly type. Intense electric fields are applied simultaneously across the thickness of the photographic or X-ray film to produce electron avalanches at each center of latent-image response to exposure. The application of the voltage pulse is synchronized with the pulse of X-rays for the attainment of film speed and contrast enhancement.
Inventors
- 👤 R Mcmaster
- 👤 M Rhoten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:57
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/08; H05G1/10; H05G1/22; G; G03; G03B; G03B42/00; G03B42/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
130 words
Apparatus for radiographic recording utilizing an emulsion film comprising: a high voltage pulse generator, a penetrating radiation source, means for supporting radiographic film in the path of radiation from said source and adjacent an object to be radiographed and film enhancement high voltage electrode positioned adjacent said film; said high voltage pulse generator comprising a stacked piezoelectric assembly and operative to produce simultaneously a pair of high voltage pulses of extreme short duration in the range of from 30 to 40 nanoseconds, means applying the first of said pair of pulses to said radiation source so as to generate radiation, means for synchronizing said pair of pulses for simultaneously applying the second of said pair of pulses to said electrode and for increasing the fim response several orders of magnitude.
Claim 2
Dependent Claim
130 words
Apparatus for radiographic recording utilizing an emulsion film comprising: a high voltage pulse generator, a penetrating radiation source, means for supporting radiographic film in the path of radiation from said source and adjacent an object to be radiographed and film enhancement high voltage electrode positioned adjacent said film; said high voltage pulse generator comprising a stacked piezoelectric assembly and operative to produce simultaneously a pair of high voltage pulses of extreme short duration in the range of from 30 to 40 nanoseconds, means applying the first of said pair of pulses to said radiation source so as to generate radiation, means for synchronizing said pair of pulses for simultaneously applying the second of said pair of pulses to said electrode and for increasing the fim response several orders of magnitude.
Claim 3
Dependent Claim
130 words
Apparatus for radiographic recording utilizing an emulsion film comprising: a high voltage pulse generator, a penetrating radiation source, means for supporting radiographic film in the path of radiation from said source and adjacent an object to be radiographed and film enhancement high voltage electrode positioned adjacent said film; said high voltage pulse generator comprising a stacked piezoelectric assembly and operative to produce simultaneously a pair of high voltage pulses of extreme short duration in the range of from 30 to 40 nanoseconds, means applying the first of said pair of pulses to said radiation source so as to generate radiation, means for synchronizing said pair of pulses for simultaneously applying the second of said pair of pulses to said electrode and for increasing the fim response several orders of magnitude.
Claim 4
Dependent Claim
130 words
Apparatus for radiographic recording utilizing an emulsion film comprising: a high voltage pulse generator, a penetrating radiation source, means for supporting radiographic film in the path of radiation from said source and adjacent an object to be radiographed and film enhancement high voltage electrode positioned adjacent said film; said high voltage pulse generator comprising a stacked piezoelectric assembly and operative to produce simultaneously a pair of high voltage pulses of extreme short duration in the range of from 30 to 40 nanoseconds, means applying the first of said pair of pulses to said radiation source so as to generate radiation, means for synchronizing said pair of pulses for simultaneously applying the second of said pair of pulses to said electrode and for increasing the fim response several orders of magnitude.
Claim 5
Dependent Claim
21 words
Apparatus as set forth in claim 1 wherein said radiation source is an X-ray source and said film is X-ray film.
Claim 6
Dependent Claim
22 words
Apparatus as set forth in claim 1 wherein said means for applying said pulses to said radiation source is a spark gap.
Claim 7
Dependent Claim
30 words
Apparatus as set forth in claim 1 wherein said high voltage generator is of the stacked piezoelectric assembly type and said pulses are generated across said stack by force impact.
Claim 8
Dependent Claim
45 words
Apparatus as set forth in claim 1 wherein said high voltage generator is of the stacked piezoelectric assembly type and said pulses are generated across said stack by pressure release and wherein said first and second means for applying comprises means coupled to said stack.
Claim 9
Dependent Claim
37 words
Apparatus as set forth in claim 4 wherein said stack of piezoelectric assemblies includes a terminal for deriving a first high voltage pulse and an intermediate terminal and coupling means for deriving a second high voltage pulse.
Claim 10
Dependent Claim
15 words
Apparatus as set forth in claim 5 wherein said coupling means is a spark gap.
Claim 11
Dependent Claim
15 words
Apparatus as set forth in claim 1 wherein said last-named means comprises a spark gap.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |