US3882357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery operated electroluminescent film identification device
Assignee: EIDP Inc
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Filing: 1974-02-27
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Granted: 1975-05-06
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Expires: 1994-02-27
Abstract
Abstract Apparatus containing a d.c. power source, a timing circuit, and a transformer to excite an electroluminescent material for use in a film identification device to imprint patient identification data on X-ray film. To preserve battery life the timing circuit will allow only enough electrical energy to be imparted to the transformer as is necessary to excite the lamp. Both the electrical energy coupled through the transformer and the energy stored in the transformer will be applied to the lamp to excite it.
Inventors
- 👤 Gerrit Nieuweboer
- 👤 Martin A Apostolico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:15
CPC Classifications
H; H05; H05B; H05B44/00; Y; Y02; Y02B; Y02B20/00; Y02B20/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
Apparatus for electrically exciting an electroluminescent material, comprising: a d.c. storage means for providing a d.c. voltage to a first and second timing means and a transformer, a means for electrically connecting said d.c. storage means to said first and second timing means and said transformer, said first timing means generating an electrical gate pulse, said second timing means being electrically responsive to said gate pulse and generating a series of electrical pulses, said electrical pulses occurring during the duration of said gate pulse, said second timing means being further electrically responsive to termination of said gate pulse and terminating said series of pulses, said transformer being electrically coupled to said second timing means and developing a voltage in response to each pulse of said series of pulses, said transformer being further electrically coupled to said electroluminescent material and applying said voltage to said electroluminescent material, said transformer, upon termination of each pulse, expending substantially all energy therein to said electroluminescent material as an oppositely polarized pulse.
Claim 2
Dependent Claim
167 words
Apparatus for electrically exciting an electroluminescent material, comprising: a d.c. storage means for providing a d.c. voltage to a first and second timing means and a transformer, a means for electrically connecting said d.c. storage means to said first and second timing means and said transformer, said first timing means generating an electrical gate pulse, said second timing means being electrically responsive to said gate pulse and generating a series of electrical pulses, said electrical pulses occurring during the duration of said gate pulse, said second timing means being further electrically responsive to termination of said gate pulse and terminating said series of pulses, said transformer being electrically coupled to said second timing means and developing a voltage in response to each pulse of said series of pulses, said transformer being further electrically coupled to said electroluminescent material and applying said voltage to said electroluminescent material, said transformer, upon termination of each pulse, expending substantially all energy therein to said electroluminescent material as an oppositely polarized pulse.
Claim 3
Dependent Claim
56 words
The apparatus of claim 1 additionally comprising: a switching means being electrically responsive to each pulse of said series of pulses to initiate a flow of current through said transformer, said switching means being electrically responsive to the termination of each said pulse to cut off said current at or before the saturation of said transformer.
Claim 4
Dependent Claim
34 words
The apparatus of claim 1, additionally comprising: a switching means electrically responsive to the termination of each pulse of said series of pulses and presenting a high impedance path between said transformer and ground.
Claim 5
Dependent Claim
34 words
The apparatus of claim 1, in which said means for electronically connecting said circuit is a non-bounce switch electrically connecting said d.c. storage means to said first and second timing means and said transformer.
Claim 6
Dependent Claim
240 words
Apparatus for exposing a photosensitive material comprising: a d.c. storage means for providing a d.c. voltage to a first and second timing means and a transformer, a means for electrically connecting said d.c. storage means to said first and second timing means and said transformer said first timing means generating an electrical gate pulse, said second timing means being electrically responsive to said gate pulse and generating a series of electrical pulses, said pulses occurring during the duration of said gate pulse, said second timing means being further electrically responsive to the termination of said gate pulse and terminating said series of pulses, a transistor switch being electrically responsive to each said pulse of said series of pulses and initiating a current flow through said transformer for each said pulse, each said pulse being of a limited duration to saturate said transformer, said transistor switch being electrically responsive to the termination of each pulse and presenting a high impedance path between said transformer and ground an electroluminescent material said transformer being electrically coupled to said transistor switch and deveLoping a voltage in response to current flow through said transistor switch, said transformer being further electrically coupled to said electroluminescent material and applying said voltage to said electroluminescent material, said transformer being responsive to the presence of said high impedance path to ground, to expend substantially all energy stored in said transformer to said electroluminescent material as an oppositely polarized voltage.
Claim 7
Dependent Claim
240 words
Apparatus for exposing a photosensitive material comprising: a d.c. storage means for providing a d.c. voltage to a first and second timing means and a transformer, a means for electrically connecting said d.c. storage means to said first and second timing means and said transformer said first timing means generating an electrical gate pulse, said second timing means being electrically responsive to said gate pulse and generating a series of electrical pulses, said pulses occurring during the duration of said gate pulse, said second timing means being further electrically responsive to the termination of said gate pulse and terminating said series of pulses, a transistor switch being electrically responsive to each said pulse of said series of pulses and initiating a current flow through said transformer for each said pulse, each said pulse being of a limited duration to saturate said transformer, said transistor switch being electrically responsive to the termination of each pulse and presenting a high impedance path between said transformer and ground an electroluminescent material said transformer being electrically coupled to said transistor switch and deveLoping a voltage in response to current flow through said transistor switch, said transformer being further electrically coupled to said electroluminescent material and applying said voltage to said electroluminescent material, said transformer being responsive to the presence of said high impedance path to ground, to expend substantially all energy stored in said transformer to said electroluminescent material as an oppositely polarized voltage.
References Cited (Backward Citations)
US3646926A
Cited
US3743918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |