US3925604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog-recording apparatus for recording and derandomizing randomly-occurring data
Assignee: RIVERSIDE BIO ENGINEERING Inc
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Filing: 1972-08-04
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Granted: 1975-12-09
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Expires: 1992-08-04
Abstract
Abstract Radioactive particles such as gamma rays emanate from an organ of interest into which a radioactive substance has been injected and may be detected by a scintillation camera. The scintillation camera output is detected and analyzed to provide input information for use by a cathode ray tube to reproduce thereon the positions of the radioactive material in the organ of interest so that the same may be viewed by a physician or other interested person. The signals as applied to the cathode ray tube are stored by an analog-storage means as they occur. The stored signals are then sequentially removed, converted to a variable width pulse and differentiated, after which they are recorded upon a serial-recording medium such as a magnetic tape. The recorded information on the tape may be removed therefrom by converting the differentiated signal to a variable width pulse, which pulse is then converted to an amplitude representative of the variable width for re-application to the cathode ray tube for review by an interested party. The recorded tape may be played at speeds different from that at which it was recorded and it may be played forward or reverse without loss or degradation of the stored data.
Inventors
- 👤 Richard D Bliss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:56
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/161; G01T1/164; G01T1/1641; G01T1/1647
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
128 words
Analog-recording apparatus for recording analog signals on serial-recording medium in a derandomized fashion which signals are representative of randomly-occurring data emanating from a detector, said apparatus comprising: A. a plurality of storage cells each adapted to receive and store for later complete removal one of a plurality of analog signals representative of randomly-occurring data; B. timing means for generating first and second time intervals; C. gating means operative during said first time interval for applying one of said analog signals upon generation thereof to one of said cells only in the absence of a signal being stored therein; and D. means operative during said second time interval for sequentially removing said stored signals from said cells with a regularized time interval therebetween for recording on said recording medium.
Claim 2
Dependent Claim
128 words
Analog-recording apparatus for recording analog signals on serial-recording medium in a derandomized fashion which signals are representative of randomly-occurring data emanating from a detector, said apparatus comprising: A. a plurality of storage cells each adapted to receive and store for later complete removal one of a plurality of analog signals representative of randomly-occurring data; B. timing means for generating first and second time intervals; C. gating means operative during said first time interval for applying one of said analog signals upon generation thereof to one of said cells only in the absence of a signal being stored therein; and D. means operative during said second time interval for sequentially removing said stored signals from said cells with a regularized time interval therebetween for recording on said recording medium.
Claim 3
Dependent Claim
74 words
first wave-shaping means for differentiating said variable time-duration signal for application thereof to said recording means; D. control means for controlling reception and removal of said signals with respect to said storage means; E. means for reproducing said recorded signal from said recording means; F. second wave-shaping means for converting said reproduced signal to a variable time-duration signal; and G. second converter means for converting said variable time-duration signal to a variable amplitude signal.
Claim 4
Dependent Claim
74 words
first wave-shaping means for differentiating said variable time-duration signal for application thereof to said recording means; D. control means for controlling reception and removal of said signals with respect to said storage means; E. means for reproducing said recorded signal from said recording means; F. second wave-shaping means for converting said reproduced signal to a variable time-duration signal; and G. second converter means for converting said variable time-duration signal to a variable amplitude signal.
Claim 5
Dependent Claim
42 words
Analog recording apparatus according to claim 1 wherein said gating means sequentially applies said signals to said cells whereby the first of said cells to receive a signal for storing thereon is the first cell to have said stored signal removed therefrom.
Claim 6
Dependent Claim
39 words
Recording apparatus in accordance with claim 1 wherein said sequential removing means includes a signal amplitude-to-pulse duraTion converter for receiving said analog signal and providing a variable duration pulse which is representative of the amplitude of said analog signal.
Claim 7
Dependent Claim
47 words
Recording apparatus in accordance with claim 3 wherein said converter means includes a ramp generator coupled to receive said analog signal and to provide the variable time position of the trailing edge of said pulse responsive to coincidence of the amplitude of said signal and said ramp.
Claim 8
Dependent Claim
45 words
Recording apparatus in accordance with claim 3 wherein said sequential removing means further includes differentiation means coupled to said converter means for providing individual pulses at the leading and trailing edges of said variable width pulse for application to said recording medium for recordation thereon.
Claim 9
Dependent Claim
46 words
Apparatus in accordance with claim 5 which further includes a playback head for reproducing said recorded differentiated signal, wave-shaping means for converting said differentiated signal to a variable-duration pulse and pulsewidth-to-amplitude converter means for converting said variable-duration pulse to an amplitude representative of said variable duration.
Claim 10
Dependent Claim
27 words
Apparatus according to claim 1 which further includes a multiplexer means for receiving said analog signal and controlling the application thereof to said pluralitiy of storage cells.
Claim 11
Dependent Claim
24 words
Apparatus according to claim 7 which further includes second multiplexer means for controlling the application of said stored analog signal to said recording medium.
Claim 12
Dependent Claim
15 words
Apparatus according to claim 8 which further includes control logic connected to said multiplexer means.
Claim 13
Dependent Claim
86 words
Analog record-playback apparatus for non-random reproduction of variable amplitude analog signals representative of randomly-occurring data emanating from an area of interest comprising: A. analog signal storage means for receiving said signals as they occur and storing the same for a predetermined period of time; B. analog signal-recording means; C. analog signal-removal means coupled between said storage means and recording means for sequentially removing said stored signals from said storage means and applying said removed signals to said recording means for recording thereon, said signal-removal means including:
Claim 14
Dependent Claim
86 words
Analog record-playback apparatus for non-random reproduction of variable amplitude analog signals representative of randomly-occurring data emanating from an area of interest comprising: A. analog signal storage means for receiving said signals as they occur and storing the same for a predetermined period of time; B. analog signal-recording means; C. analog signal-removal means coupled between said storage means and recording means for sequentially removing said stored signals from said storage means and applying said removed signals to said recording means for recording thereon, said signal-removal means including:
Claim 15
Dependent Claim
77 words
Analog record-playback apparatus according to claim 10 wherein said first converter means includes a ramp generator for providing a linear ramp signal between first and second fixed reference potentials, said amplitude of said stored analog signal falling between said reference potentials, said leading edge of said variable time-duration signal occurring upon coincidence of said ramp and said first reference and said trailing edge thereof occurring upon coincidence between said ramp and said amplitude of said stored signal.
Claim 16
Dependent Claim
36 words
Analog record-playback apparatus according to claim 10 which further includes cathode ray tube means and means coupling said cathode ray tube means to said record converter means for providing a visual representation of said recorded signals.
Claim 17
Dependent Claim
63 words
Analog record-playback apparatus according to claim 12 which further includes scintillation camera means and means coupling said scintillation camera means to said cathode ray tube means and said analog signal storage means for Simultaneously providing a visual representation in real time of randomly-occurring data from an area of interest viewed by said camera and as a derandomized record thereof on said recording means.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |