Patent US3681977A successfully refreshed from Google Patents.
US3681977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic encephalographic system
Assignee: PFAUDEVIL HOLDINGS Co
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Filing: 1965-08-02
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Granted: 1972-08-08
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Expires: 1985-08-02
Abstract
Abstract Ultrasonic encephalographic system in which left and right transmitting-receiving transducers are positioned on opposite sides of the head and in which three separate A-scan traces are produceable on an oscilloscope screen, the first being produceable by transmission and reception by the left transducer, the second being produceable by transmission and reception by the right transducer and the third being produceable by transmission from one transducer and reception by the other. The traces can be readily compared to accurately locate the midline of the brain. Specific features relate to arrangements for selectively controlling operation to obtain information desired for diagnostic purposes, a foot switch being preferably provided for such control purposes.
Inventors
- 👤 John A Wendt
- 👤 Peter J Rosauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:49
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/08; A61B8/0808; A61B8/0816
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
366 words
In an ultrasonic encephalographic system for determining the location of the midline of the brain, a first transmittingreceiving transducer arranged to be placed against one side of the head, a second transmitting-receiving transducer arranged to be placed against the opposite side of the head in alignment with said first transducer, first pulsing means for causing pulsing of said first transducer, second pulsing means for causing pulsing of said second transducer, an oscilloscope having a screen, a sweep circuit operated periodically at a rapid rate for sweeping a spot across said screen in one direction to produce traces, an amplifier and level control circuit for deflecting said spot in a direction transverse to said one direction and for controlling the position of said traces in said transverse direction, timing means for supplying a timing signal synchronized with the operation of said sweep circuit, a control circuit having first, second and third stable conditions, means responsive to said timing signal for cyclically operating said control circuit through said stable conditions in a predetermined order with said control circuit being in one of said stable conditions during each trace of said spot, means interconnecting said control circuit and said amplifier and level control circuit to place said tRaces at first, second and third positions on said screen during said first, second and third conditions of said control circuit, first and second received signal gate circuits having inputs coupled to said first and second transducers and having outputs coupled to said amplifier and level control circuit for deflecting said spot in said transverse direction in response to echo signals from said transducers, first and second pulsing gate circuits for applying signals from said timing means to said first and second second pulsing circuits, and means for applying signals from said control circuit to said gate circuits to automatically operate said first pulsing gate circuit and said first received signal gate circuit in said first condition of said control circuits, said second pulsing gate circuit and said second received signal gate circuit in said second condition of said control circuit and said first pulsing gate circuit and said second received signal gate circuit in said third condition of said control circuit.
Claim 2
Dependent Claim
366 words
In an ultrasonic encephalographic system for determining the location of the midline of the brain, a first transmittingreceiving transducer arranged to be placed against one side of the head, a second transmitting-receiving transducer arranged to be placed against the opposite side of the head in alignment with said first transducer, first pulsing means for causing pulsing of said first transducer, second pulsing means for causing pulsing of said second transducer, an oscilloscope having a screen, a sweep circuit operated periodically at a rapid rate for sweeping a spot across said screen in one direction to produce traces, an amplifier and level control circuit for deflecting said spot in a direction transverse to said one direction and for controlling the position of said traces in said transverse direction, timing means for supplying a timing signal synchronized with the operation of said sweep circuit, a control circuit having first, second and third stable conditions, means responsive to said timing signal for cyclically operating said control circuit through said stable conditions in a predetermined order with said control circuit being in one of said stable conditions during each trace of said spot, means interconnecting said control circuit and said amplifier and level control circuit to place said tRaces at first, second and third positions on said screen during said first, second and third conditions of said control circuit, first and second received signal gate circuits having inputs coupled to said first and second transducers and having outputs coupled to said amplifier and level control circuit for deflecting said spot in said transverse direction in response to echo signals from said transducers, first and second pulsing gate circuits for applying signals from said timing means to said first and second second pulsing circuits, and means for applying signals from said control circuit to said gate circuits to automatically operate said first pulsing gate circuit and said first received signal gate circuit in said first condition of said control circuits, said second pulsing gate circuit and said second received signal gate circuit in said second condition of said control circuit and said first pulsing gate circuit and said second received signal gate circuit in said third condition of said control circuit.
Claim 3
Dependent Claim
211 words
In an ultrasonic encephalographic system as defined in claim 1, mode selector control means having first, second, third and fourth positions, means controlled by said mode selector control means in said first position thereof for effecting said automatic operation of said pulsing and received signal gate circuits from said control circuit, means controlled by said mode selector control means in said second position thereof for disabling said automatic operation of said pulsing and received signal gate circuits from said control circuit and for rendering said first pulsing gate means and said first received signal gate means operative during each operation of said sweep circuit, means controlled by said mode selector control means in said second position thereof for disabling said automatic operation of said pulsing and received signal gate circuits from said control circuit and for rendering said second pulsing gate means and said second received signal gate means operative during each operation of said sweep circuit, and means controlled by said mode selector control means in said fourth position thereof for disabling said automatic operation of said pulsing and received signal gate circuits from said control circuit and for rendering said first pulsing gate means and said second received signal gate means operative during each operation of said sweep circuit.
Claim 4
Dependent Claim
33 words
In an ultrasonic encephalographic system as defined in claim 2, foot switch means for operating said mode selector control means into any selected one of said first, second, third and fourth positions thereof.
Claim 5
Dependent Claim
50 words
In an ultrasonic encephalographic system as defined in claim 1, said received signals from said first and second transducers applied through said first and second received signal gate circuits to said amplifier and level control circuit being applied with opposite polarities to produce deflections of said spot in opposite directions.
Claim 6
Dependent Claim
83 words
In an ultrasonic encephalographic system as defined in claim 1, said control circuit comprising a shift register having first, second and third stages each having first and second stable states, means interconnecting said stages for switching each stage into its first stable state while each of the other two stages is in its second stable state, said timing signal being applied to shift said stages for cyclic operation thereof and to establish said first, second and third stable conditions of said control circuit.
Claim 7
Dependent Claim
363 words
In an ultrasonic encephalographic system for determining the location of the midline of the brain, a first transmitting-receiving transducer arranged to be placed against one side of the head, a second transmitting-receiving transducer arranged to be placed against the opposite side of the head in alignment with said first transducer, first pulsing means for causing pulsing of said first transducer, second pulsing means for causing pulsing of said second transducer, an oscilloscope having a screen, a sweep circuit operated periodically at a rapid rate For sweeping a spot across said screen in one direction to produce traces, an amplifier and level control circuit for deflecting said spot in a direction transverse to said one direction and for controlling the position of said traces in said transverse direction, timing means for supplying a timing signal synchronized with the operation of said sweep circuit, a control circuit having first, second and third stable conditions, means responsive to said timing signal for cyclically operating said control circuit through said stable conditions in a predetermined order with said control circuit being in one of said stable conditions during each trace of said spot, means interconnecting said control circuit and said level control circuit to place said traces at first, second and third positions on said screen during said first, second and third conditions of said control circuit, first and second received signal gate circuits having inputs coupled to said first and second transducers and having outputs coupled to said amplifier and level control circuit for deflecting said spot in said transverse direction in response to echo signals from said transducers, first and second pulsing gate circuits for applying signals from said timing means to said first and second pulsing circuits, and means for applying signals from said control circuit to said gate circuits to automatically operate said first pulsing gate circuit and said first received signal gate circuit in said first condition of said control circuit, said second pulsing gate circuit and said second received signal gate circuit in said second condition of said control circuit and said first pulsing gate circuit and said second received signal gate circuit in said third condition of said control circuit.
Claim 8
Dependent Claim
363 words
In an ultrasonic encephalographic system for determining the location of the midline of the brain, a first transmitting-receiving transducer arranged to be placed against one side of the head, a second transmitting-receiving transducer arranged to be placed against the opposite side of the head in alignment with said first transducer, first pulsing means for causing pulsing of said first transducer, second pulsing means for causing pulsing of said second transducer, an oscilloscope having a screen, a sweep circuit operated periodically at a rapid rate For sweeping a spot across said screen in one direction to produce traces, an amplifier and level control circuit for deflecting said spot in a direction transverse to said one direction and for controlling the position of said traces in said transverse direction, timing means for supplying a timing signal synchronized with the operation of said sweep circuit, a control circuit having first, second and third stable conditions, means responsive to said timing signal for cyclically operating said control circuit through said stable conditions in a predetermined order with said control circuit being in one of said stable conditions during each trace of said spot, means interconnecting said control circuit and said level control circuit to place said traces at first, second and third positions on said screen during said first, second and third conditions of said control circuit, first and second received signal gate circuits having inputs coupled to said first and second transducers and having outputs coupled to said amplifier and level control circuit for deflecting said spot in said transverse direction in response to echo signals from said transducers, first and second pulsing gate circuits for applying signals from said timing means to said first and second pulsing circuits, and means for applying signals from said control circuit to said gate circuits to automatically operate said first pulsing gate circuit and said first received signal gate circuit in said first condition of said control circuit, said second pulsing gate circuit and said second received signal gate circuit in said second condition of said control circuit and said first pulsing gate circuit and said second received signal gate circuit in said third condition of said control circuit.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |