US4386834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kirlian photography device
Assignee: FOX DOROTHY F
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Filing: 1981-07-06
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Granted: 1983-06-07
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Expires: 2001-07-06
Abstract
Abstract A battery-powered corona discharge photography device for holding a photographic recording medium adjacent an electrode, with a specimen in contact with the recording medium. A highly regulated voltage source is coupled by a voltage step-up circuit to a capacitor for storage of an increased level voltage. A silicon controlled rectifier is triggered by a pulse generator to discharge the capacitor, causing a voltage pulse across a transformer primary. Once the pulse generator is activated, it generates a series of pulses of a number determined by the setting of a switch, and so a like series of high voltage electrical pulses is generated across the transformer secondary, and this secondary is connected to the electrode. Either of two transformers can selectively be utilized, to provide selectivity in the frequency characteristics of the high voltage electrical pulses. Means are also provided for reversing the polarity or adjusting the voltage level of the high voltage electrical pulses.
Inventors
- 👤 William K. Toolan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:03
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
181 words
A corona discharge photography device comprising electrode means; means for holding a photographic recording medium adjacent said electrode means to contact a specimen to be subjected to corona discharge photography; a source of electrical control pulses; activating means for activatin g said electrical control pulse source; a counter for counting electrical control pulses from said electrical control pulse source and deactivating said electrical control pulse source in response to counting of a preset number of electrical control pulses; a voltage source; voltage regulator means for regulating the voltage level of the voltage from said voltage source; high voltage generating means coupled to said voltage regulator means and said electrical control pulse source and responsive to each electrical control pulse for generating from the regulated voltage a high voltage electrical pulse; and means coupling said high voltage pulse generating means to said electrode means for application of the high voltage pulses thereto to cause corona discharge about a specimen contacting a photographic recording medium adjacent said electrode means to make a corona discharge photograph of the specimen on the photographic recording medium.
Claim 2
Dependent Claim
181 words
A corona discharge photography device comprising electrode means; means for holding a photographic recording medium adjacent said electrode means to contact a specimen to be subjected to corona discharge photography; a source of electrical control pulses; activating means for activatin g said electrical control pulse source; a counter for counting electrical control pulses from said electrical control pulse source and deactivating said electrical control pulse source in response to counting of a preset number of electrical control pulses; a voltage source; voltage regulator means for regulating the voltage level of the voltage from said voltage source; high voltage generating means coupled to said voltage regulator means and said electrical control pulse source and responsive to each electrical control pulse for generating from the regulated voltage a high voltage electrical pulse; and means coupling said high voltage pulse generating means to said electrode means for application of the high voltage pulses thereto to cause corona discharge about a specimen contacting a photographic recording medium adjacent said electrode means to make a corona discharge photograph of the specimen on the photographic recording medium.
Claim 3
Dependent Claim
88 words
A device as claimed in claim 1 in which said high voltage pulse generating means comprises voltage step-up means for increasing the voltage level of the regulated voltage; voltage storage means coupled to said voltage step-up means for rotating the increased level voltage therefrom; and switching means coupled to said voltage storage means and responsive to the electrical control pulses for discharging said voltage storage means to provide in response to a series of the electrical control pulses a like series of pulses of the increased level voltage.
Claim 4
Dependent Claim
54 words
A device as claimed in claim 2 in which said voltage step-up means comprises a transformer and a switching device coupled to said voltage regulator means as an oscillator for generating across the transformer secondary pulses of increased level voltage, and means for applying the increased level voltage pulses to said voltage storage means.
Claim 5
Dependent Claim
37 words
A device as claimed in claim 2 in which said switching means comprises a silicon controlled rectifier having its anode-cathode circuit connected to said voltage storage means and its gate coupled to said electrical control pulse source.
Claim 6
Dependent Claim
33 words
A device as claimed in claim 2 in which said high voltage pulse generating means further comprises transformer means responsive to the pulses of increased level voltage for generating high voltage electrical pulses.
Claim 7
Dependent Claim
99 words
A device as claimed in claim 5 in which said transformer means comprises a first transformer responsive to receipt of voltage pulses at the primary thereof for providing at the secondary thereof voltage pulses having a first frequency characteristic, a second transformer responsive to receipt of voltage pulses at the primary thereof for providing at the secondary thereof voltage pulses having a second frequency characteristic of a higher frequency than the first frequency characteristic, and switching means actuable to selectively couple one of said first transformer and said second transformer between said voltage storage means and said coupling means.
Claim 8
Independent Claim
31 words
A device as claimed in any one of claims 1-6 in which said high voltage pulse generating means includes means for selectively determining the polarity of the high voltage electrical pulses.
Claim 9
Independent Claim
37 words
A device as claimed in any one of claims 1-6 in which said counter includes means for selectively presetting the number of electrical control pulses which said counting means counts before deactivating said electrical control pulse source.
Claim 10
Dependent Claim
19 words
A device as claimed in claim 1 in which said electrical control pulse source is a gated free-running oscillator.
Claim 11
Dependent Claim
27 words
A device as claimed in claim 1 in which said voltage source is adjustable to permit adjustment of the voltage level of the high voltage electrical pulses.
Claim 12
Dependent Claim
31 words
A device as claimed in claim 1 in which said voltage source includes a battery and circuit means adapted for connection to an external voltage source for recharging of said battery.
Claim 13
Dependent Claim
27 words
A device as claimed in claim 11 further comprising circuit means for indicating when the voltage level of said battery is low, requiring recharging of said battery.
References Cited (Backward Citations)
US3912989A
Cited
US4222658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |