US3798542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy measuring device for pulse type defibrillators
Assignee: Individual
•
Filing: 1972-07-05
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Granted: 1974-03-19
•
Expires: 1992-07-05
Abstract
Abstract Apparatus and method for testing the energy output of a defibrillator or the like comprising a pair of contacts, a resistance element electrically connected between said contacts, a threshold monitoring device electrically connected between said contacts and parallel with the resistance element, and indicator means electrically connected to the threshold monitoring device for indicating when the energy output of the defibrillator exceeds a predetermined value.
Inventors
- 👤 R Dempsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:41
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/16576; A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3925; A61N1/3937; G01R31/00; G01R31/28; G01R31/2832; G01R31/2836
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
241 words
Apparatus for testing the output energy of pulse-type equipment such as a defibrillator by imposing a resistive load and a time sensitive circuit across the output of the equipment, said apparatus comprising, in combination: a pair of electrically conducting contacts adapted to be connected to the output of said equipment; a resistive load element of pred-determined resistance electrically connected between said contacts; a voltage squaring and integrating circuit electrically connected between said contacts and in parallel with said resistive load element, for providing a voltage signal which is approximately proportional to the integral of the square of the voltage on said resistive load and is thus proportional to the energy dissipated in said resistive load within the anticipated operating range of said pulse-type equipment, said circuit comprising: 1. a series of resistors and a capacitor series connected between said contacts; and, 2. a series of Zener diodes series connected to one another and parallel connected, respectively, to said respective resistors to successively breakdown and conduct around the resistors as the voltage on the load element increases so as to modify the charging current on the capacitor to be approximately proportional to the square of the voltage on the load element; an indicator means electrically connected to said voltage squaring and integrating circuit for indicating to the operator when the voltage signal of said voltage squaring and integrating circuit, and thus the electrical energy output of said equipment, exceeds a predetermined value.
Claim 2
Dependent Claim
241 words
Apparatus for testing the output energy of pulse-type equipment such as a defibrillator by imposing a resistive load and a time sensitive circuit across the output of the equipment, said apparatus comprising, in combination: a pair of electrically conducting contacts adapted to be connected to the output of said equipment; a resistive load element of pred-determined resistance electrically connected between said contacts; a voltage squaring and integrating circuit electrically connected between said contacts and in parallel with said resistive load element, for providing a voltage signal which is approximately proportional to the integral of the square of the voltage on said resistive load and is thus proportional to the energy dissipated in said resistive load within the anticipated operating range of said pulse-type equipment, said circuit comprising: 1. a series of resistors and a capacitor series connected between said contacts; and, 2. a series of Zener diodes series connected to one another and parallel connected, respectively, to said respective resistors to successively breakdown and conduct around the resistors as the voltage on the load element increases so as to modify the charging current on the capacitor to be approximately proportional to the square of the voltage on the load element; an indicator means electrically connected to said voltage squaring and integrating circuit for indicating to the operator when the voltage signal of said voltage squaring and integrating circuit, and thus the electrical energy output of said equipment, exceeds a predetermined value.
Claim 3
Dependent Claim
43 words
The apparatus according to claim 1 wherein said resistive load element has a pRedetermined resistance value substantially equal to the transthorax impedance of a human body, whereby said apparatus will measure the energy output of a defibrillator when used on a human body.
Claim 4
Dependent Claim
99 words
a series of Zener diodes series connected to one another and parallel connected, respectively, to said respective resistors to successively breakdown and conduct around the resistors as the voltage on the load element increases so as to modify the charging current on the capacitor to be approximately proportional to the square of the voltage on the load element; an indicator means electrically connected to said voltage squaring and integrating circuit for indicating to the operator when the voltage signal of said voltage squaring and integrating circuit, and thus the electrical energy output of said equipment, exceeds a predetermined value.
Claim 5
Dependent Claim
99 words
a series of Zener diodes series connected to one another and parallel connected, respectively, to said respective resistors to successively breakdown and conduct around the resistors as the voltage on the load element increases so as to modify the charging current on the capacitor to be approximately proportional to the square of the voltage on the load element; an indicator means electrically connected to said voltage squaring and integrating circuit for indicating to the operator when the voltage signal of said voltage squaring and integrating circuit, and thus the electrical energy output of said equipment, exceeds a predetermined value.
Claim 6
Dependent Claim
58 words
a series of Zener diodes series connected to one another and parallel connected, respectively, to said respective resistors to successively breakdown and conduct around the resistors as the voltage on the load means increases so as to modify the charging current on the capacitor to be approximately proportional to the square of the voltage on the load means.
Claim 7
Dependent Claim
58 words
a series of Zener diodes series connected to one another and parallel connected, respectively, to said respective resistors to successively breakdown and conduct around the resistors as the voltage on the load means increases so as to modify the charging current on the capacitor to be approximately proportional to the square of the voltage on the load means.
Claim 8
Dependent Claim
88 words
a series of Zener diodes series connected to one another and parallel connected, respectively, to said respective resistors to successively breakdown and conduct around the resistors as the voltage on the load element increases so as to modify the charging current on the capacitor to be approximately proportional to the square of the voltage on the load element; indicator means observable externally of said housing electrically connected to said circuit for indicating to the operator when the electrical energy output from said defibrillator paddles exceed a predetermined value.
Claim 9
Dependent Claim
88 words
a series of Zener diodes series connected to one another and parallel connected, respectively, to said respective resistors to successively breakdown and conduct around the resistors as the voltage on the load element increases so as to modify the charging current on the capacitor to be approximately proportional to the square of the voltage on the load element; indicator means observable externally of said housing electrically connected to said circuit for indicating to the operator when the electrical energy output from said defibrillator paddles exceed a predetermined value.
Claim 10
Dependent Claim
17 words
The apparatus according to claim 1 wherein said indicator means is connected in parallel with said capacitor.
Claim 11
Dependent Claim
118 words
The apparatus according to claim 1 wherein some of said resistors and the Zener diodes in parallel therewith are disposed between said capacitor and one of said contacts and the remainder of said resistors and the Zener diodes in parallel therewith are disposed between the capacitor and the other of said contacts, the polarity of said Zener diodes disposed between said one contact and said capacitor being in opposition to the polarity of said Zener diodes disposed between said capacitor and said other contact, whereby some of the Zener diodes are operating in a forward direction and some are operating in a reverse direction to give the apparatus a bi-polar characteristic modifying the charging rate of the capacitor.
Claim 12
Dependent Claim
127 words
Apparatus for testing the output energy of pulse-type defibrillator equipment having a pair of output paddles by imposing a resistive load and a voltage squaring and integrating circuit between the output paddles, said apparatus comprising, in combination: an open-ended housing; a pair of electrically conducting contact plates positioned over said open ends, said contact plates adapted to be engaged by said output paddles; a resistive load element of predetermined resistance electrically connected between said contact plates and disposed within said housing and supported by said contact plates; a circuit disposed within said housing and electrically connected between said contact plates in parallel with said resistive load element, for providing a voltage proportional to the integral of the square of voltage on said resistive load, said circuit comprising:
Claim 13
Dependent Claim
127 words
Apparatus for testing the output energy of pulse-type defibrillator equipment having a pair of output paddles by imposing a resistive load and a voltage squaring and integrating circuit between the output paddles, said apparatus comprising, in combination: an open-ended housing; a pair of electrically conducting contact plates positioned over said open ends, said contact plates adapted to be engaged by said output paddles; a resistive load element of predetermined resistance electrically connected between said contact plates and disposed within said housing and supported by said contact plates; a circuit disposed within said housing and electrically connected between said contact plates in parallel with said resistive load element, for providing a voltage proportional to the integral of the square of voltage on said resistive load, said circuit comprising:
Claim 14
Dependent Claim
97 words
Apparatus for use in testing the output energy of pulse-type defibrillator equipment, said apparatus comprising: a pair of electrically conductive contacts adapted to be connected to the output of defibrillator equipment to receive the output energy thereof; electrical load means connected between said contacts for absorbing the output energy received thereby from defibrillator equipment; a voltage sensitive circuit electrically connected to said load means for providing a voltage proportional to the integral of the square of voltage on the load means whereby said circuit reflects the total energy input to the electrical load means, said circuit comprising:
Claim 15
Dependent Claim
97 words
Apparatus for use in testing the output energy of pulse-type defibrillator equipment, said apparatus comprising: a pair of electrically conductive contacts adapted to be connected to the output of defibrillator equipment to receive the output energy thereof; electrical load means connected between said contacts for absorbing the output energy received thereby from defibrillator equipment; a voltage sensitive circuit electrically connected to said load means for providing a voltage proportional to the integral of the square of voltage on the load means whereby said circuit reflects the total energy input to the electrical load means, said circuit comprising:
Claim 16
Independent Claim
140 words
A method of testing the electrical output energy of pulse-type equipment for a pre-selected energy level, comprising the steps of: providing a resistive load element of predetermined resistance, directing the electrical output Of said equipment through said load element, producing a voltage signal that is approximately proportional to the energy dissipated in said load element by directing the load element voltage to an RC circuit having a capacitor and resistive means in series and Zener diodes in parallel combination with a portion of said resistive means whereby the charging current of the capacitor increases proportionally to the square of the load element voltage as the load element voltage increases to successive breakdown voltages of the respective Zener diodes and reduces the effective resistance of said circuit; and monitoring said voltage signal for a voltage proportional to the energy level desired.
Claim 17
Independent Claim
140 words
A method of testing the electrical output energy of pulse-type equipment for a pre-selected energy level, comprising the steps of: providing a resistive load element of predetermined resistance, directing the electrical output Of said equipment through said load element, producing a voltage signal that is approximately proportional to the energy dissipated in said load element by directing the load element voltage to an RC circuit having a capacitor and resistive means in series and Zener diodes in parallel combination with a portion of said resistive means whereby the charging current of the capacitor increases proportionally to the square of the load element voltage as the load element voltage increases to successive breakdown voltages of the respective Zener diodes and reduces the effective resistance of said circuit; and monitoring said voltage signal for a voltage proportional to the energy level desired.
Claim 18
Dependent Claim
31 words
The method according to claim 7 wherein the pulse-type equipment is a defibrillator and the resistance of said load element is chosen to approximate the trans-thorax impedance of a human body.
Claim 19
Dependent Claim
32 words
The method according to claim 7 wherein the capacitor voltage is monitored by a neon tube for a preselected voltage that will ignite the tube proportional to the preselected energy level sought.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |