US3754220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting urinary bladder outflow
Assignee: Technion Research and Development Foundation Ltd
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Filing: 1971-08-16
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Granted: 1973-08-21
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Expires: 1991-08-16
Abstract
Abstract Apparatus for monitoring liquid outflow, particularly from bladders, comprising a fluid drop detector giving an output signal for each drop, reset unit with an input connected to the output of the drop detector, a presettable timer which is reset to zero when a pulse is received from the reset unit, and an indicator connected to the timer which is activated when the time between successive pulses is greater than a predetermined value.
Inventors
- 👤 B Sztamler
- 👤 M Diskin
- 👤 A Vilensky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:20
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16886; A61M5/1689; A61B; A61B5/00; A61B5/20; A61B5/207; A61B5/208; A61M1/00; A61M1/70; Y; Y10; Y10S; Y10S128/00; Y10S128/13
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
An apparatus monitoring liquid outflow comprising a fluid drop detector having an output and giving an output signal for each drop of fluid passing within said detector, a counter having an input connected to the output of said drop detector, and having a count level output resettable to zero upon receipt of a command signal, a count level detector having an input connected to the count level output of the counter which gives an output signal when the number of counts at the count level input is less than a predetermined number during a given time period, a timer giving a commanD signal at the end of each said period to the count level detector directing it to note the number of counts appearing in the count level detector, said timer adapted to give the same command signal to said counter whereby the counter is reset to its zero count position, and an indicator having an input connected to the output of the count level detector, said indicator being actuated when the counts noted are less than a predetermined number.
Claim 2
Independent Claim
180 words
An apparatus monitoring liquid outflow comprising a fluid drop detector having an output and giving an output signal for each drop of fluid passing within said detector, a counter having an input connected to the output of said drop detector, and having a count level output resettable to zero upon receipt of a command signal, a count level detector having an input connected to the count level output of the counter which gives an output signal when the number of counts at the count level input is less than a predetermined number during a given time period, a timer giving a commanD signal at the end of each said period to the count level detector directing it to note the number of counts appearing in the count level detector, said timer adapted to give the same command signal to said counter whereby the counter is reset to its zero count position, and an indicator having an input connected to the output of the count level detector, said indicator being actuated when the counts noted are less than a predetermined number.
Claim 3
Independent Claim
154 words
An apparatus for monitoring liquid outflow comprising a fluid drop detector having an output and giving an output signal for each drop of fluid passing within said detector, a reset unit having an input connected to the output of the drop detector, a presettable timer adaptable to be reset to its zero time position each time a pulse is received from said reset unit, an indicator having an input connected to said timer and adapted to be activated when the time between two successive pulses from said reset unit is greater than a predetermined value, and a cyclic counter having an input and an output, said cyclic counter input being connected to the output of said drop detector, said cyclic counter output connected to the input of said reset unit, whereby the reset unit receives a signal from the cyclic counter only after a predetermined number of drops have passed through the drop detector.
Claim 4
Independent Claim
154 words
An apparatus for monitoring liquid outflow comprising a fluid drop detector having an output and giving an output signal for each drop of fluid passing within said detector, a reset unit having an input connected to the output of the drop detector, a presettable timer adaptable to be reset to its zero time position each time a pulse is received from said reset unit, an indicator having an input connected to said timer and adapted to be activated when the time between two successive pulses from said reset unit is greater than a predetermined value, and a cyclic counter having an input and an output, said cyclic counter input being connected to the output of said drop detector, said cyclic counter output connected to the input of said reset unit, whereby the reset unit receives a signal from the cyclic counter only after a predetermined number of drops have passed through the drop detector.
Claim 5
Dependent Claim
191 words
An electronic device for monitoring outflow comprising: a pair of electrodes, a D.C. voltage source connected to the electrodes impressing a voltage across the electrodes, a resistor connected in series with the electrodes through which current will flow when a drop passes between the electrodes, said resistor having an output, and a pulse generator connected to said resistor output for producing a signal pulse each time the current flows in said resistor, a cyclic counter which, upon receiving a preset number of pulses from said pulse generator, will generate a second output pulse, a reset component comprising a transistor connected in series with the cyclic counter, said transistor being normally non-conductive until it receives said second output pulse, a timing device comprising; a half wave rectifier; a transistor connected to the output of the rectifier which generates a square wave of prescribed frequency; a plurality of flip-flop bistable binary counters connected in series; a means for connecting the first counter to said transistor, and a field effect transistor connected to the output of said series of counters, said field effect transistor being activated by said output of said series of counters.
Claim 6
Dependent Claim
191 words
An electronic device for monitoring outflow comprising: a pair of electrodes, a D.C. voltage source connected to the electrodes impressing a voltage across the electrodes, a resistor connected in series with the electrodes through which current will flow when a drop passes between the electrodes, said resistor having an output, and a pulse generator connected to said resistor output for producing a signal pulse each time the current flows in said resistor, a cyclic counter which, upon receiving a preset number of pulses from said pulse generator, will generate a second output pulse, a reset component comprising a transistor connected in series with the cyclic counter, said transistor being normally non-conductive until it receives said second output pulse, a timing device comprising; a half wave rectifier; a transistor connected to the output of the rectifier which generates a square wave of prescribed frequency; a plurality of flip-flop bistable binary counters connected in series; a means for connecting the first counter to said transistor, and a field effect transistor connected to the output of said series of counters, said field effect transistor being activated by said output of said series of counters.
Claim 7
Dependent Claim
92 words
An electronic device of monitoring outflow comprising: a resistance sensitive drop detector for generating a signal pulse each time a drop passes within it, a resettable counter connected in series with the drop detector to receive and count the signal pulses, a digital comparator connected in series with the counter and which receives output therefrom for comparing the actual drop rate with a selected drop rate, and an indicator activated by said comparator in the event that less than the said predetermined number of drops enter said detector within the prescribed time.
Claim 8
Dependent Claim
92 words
An electronic device of monitoring outflow comprising: a resistance sensitive drop detector for generating a signal pulse each time a drop passes within it, a resettable counter connected in series with the drop detector to receive and count the signal pulses, a digital comparator connected in series with the counter and which receives output therefrom for comparing the actual drop rate with a selected drop rate, and an indicator activated by said comparator in the event that less than the said predetermined number of drops enter said detector within the prescribed time.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |