US4057173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control system for automatic metering valve
Assignee: Individual
•
Filing: 1976-04-06
•
Granted: 1977-11-08
•
Expires: 1996-04-06
Abstract
Abstract An electrical control system for an automatic metering valve delivering a preset quantity of water and having a housing for the valve, a rotary impeller disposed within the housing and rotatable at a velocity in accordance with the rate of delivery of the water, and an automatic shut-off mechanism for turning-off the valve when the preset quantity of water has been delivered. The control system includes a sensible element disposed internally of the valve housing and rotated with the impeller, a sensor sensing the sensible element to produce electrical signals corresponding to the number of rotations thereof and of the impeller, a presettable counter circuit effective to count the latter electrical signals, a switching circuit effective to actuate the valve shut-off mechanism to turn-off the valve when the counter circuit reaches a preset number corresponding to the preset quantity of fluid to be delivered, and a presettable timer effective to actuate the valve shut-off mechanism to turn-on the valve after the elapse of a preset time interval.
Inventors
- 👤 Aharon Tal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:58
CPC Classifications
G; G01; G01F; G01F15/00; G01F15/06; G01F15/068; G01F15/001
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
286 words
An electrical control system for an automatic metering valve delivering a preset quantity of a fluid and including a housing for the valve; a rotary impeller disposed within the housing and rotatable at a velocity in accordance with the rate of delivery of the fluid; and an automatic shut-off mechanism for turning-off the valve when the preset quantity of fluid has been delivered; said control system including a sensible element disposed internally of the valve housing and rotated with the impeller, a sensor sensing the sensible element to produce electrical signals corresponding to the number of rotations thereof and of the impeller, a presettable counter circuit effective to count said electrical signals, a switching circuit effective to actuate the valve shut-off mechanism to turn-off the valve when the counter circuit reaches a preset number corresponding to the preset quantity of fluid to be delivered, and a presettable timer effective to actuate the valve shut-off mechanism to turn-on the valve after the elapse of a preset time interval, said presettable counter circuit including a digital counter, a sensor output circuit for incrementing the digital counter by said sensor electrical signals, a timer producing timing electrical signals, a timer output circuit for incrementing the digital counter by said timer electrical signals, a quantity presettable device for presetting the counter according to the predetermined quantity of fluid to be delivered, a timer presettable device for presetting the counter according to the time the fluid is to be delivered, and enabling means to selectively enable the counter to produce an output signal to actuate the valve shut-off mechanism when the counter has been incremented to the present value of either the quantity presettable device or of the timer presettable device.
Claim 2
Dependent Claim
286 words
An electrical control system for an automatic metering valve delivering a preset quantity of a fluid and including a housing for the valve; a rotary impeller disposed within the housing and rotatable at a velocity in accordance with the rate of delivery of the fluid; and an automatic shut-off mechanism for turning-off the valve when the preset quantity of fluid has been delivered; said control system including a sensible element disposed internally of the valve housing and rotated with the impeller, a sensor sensing the sensible element to produce electrical signals corresponding to the number of rotations thereof and of the impeller, a presettable counter circuit effective to count said electrical signals, a switching circuit effective to actuate the valve shut-off mechanism to turn-off the valve when the counter circuit reaches a preset number corresponding to the preset quantity of fluid to be delivered, and a presettable timer effective to actuate the valve shut-off mechanism to turn-on the valve after the elapse of a preset time interval, said presettable counter circuit including a digital counter, a sensor output circuit for incrementing the digital counter by said sensor electrical signals, a timer producing timing electrical signals, a timer output circuit for incrementing the digital counter by said timer electrical signals, a quantity presettable device for presetting the counter according to the predetermined quantity of fluid to be delivered, a timer presettable device for presetting the counter according to the time the fluid is to be delivered, and enabling means to selectively enable the counter to produce an output signal to actuate the valve shut-off mechanism when the counter has been incremented to the present value of either the quantity presettable device or of the timer presettable device.
Claim 3
Dependent Claim
69 words
A control system according to claim 1, wherein said enabling means comprises a bistable device having a first state enabling the counter to produce a first output signal when it has been incremented to the preset value of the quantity presettable device, and a second state enabling the counter to produce a second output signal when it has been incremented to the preset value of the timer presettable device.
Claim 4
Dependent Claim
49 words
A control system according to claim 2, wherein said switching circuit including means effective to actuate the valve shut-off mechanism to turn-on the valve in response to said second output signal and to actuate the valve shut-off mechanism to turn-off the valve in response to said first output signal.
Claim 5
Dependent Claim
84 words
A control system according to claim 2, wherein said enabling means comprises: a first coincidence gate having an input from each of the orders of the quantity presettable device and a first enabling input from the bistable device, a second coincidence gate having an input from each of the orders of the timer presettable device and a second enabling input from the bistable device, and a timer switching device connected to receive said second enabling input from the bistable device to start the timer.
Claim 6
Dependent Claim
56 words
A control system according to claim 4, further including means for conditioning the timer either for single-shot operation to turn-on the valve after the elapse of the predetermined time interval and to turn-off the valve after it has delivered the predetermined quantity of water, or for repeat operation to continuously repeat the above sequence of events.
Claim 7
Dependent Claim
55 words
The combination of a plurality of control systems each according to claim 5 arranged in sequence, each system being connected to the next in the sequence such that when the system are conditioned for single-shot operation, the completion of the operation of one system automatically enables the operation of the next system in the sequence.
Claim 8
Dependent Claim
50 words
A control system according to claim 1, wherein said sensor output means comprises a further digital counter between the sensor and the first-mentioned digital counter, said further counter being presettable to produce a single output pulse to the first-mentioned counter for each preset number of electrical signals from the sensor.
Claim 9
Dependent Claim
25 words
A control system according to claim 1, wherein said presettable counter-circuit further includes an intergrator having an indicator for indicating the rate of fluid flow.
Claim 10
Dependent Claim
46 words
A control system according to claim 1, wherein said presettable counter-circuit further includes a rate-sensing circuit having a presettable rate and means for controlling the switching circuit to actuate the valve shut-off mechanism to turn-off the valve should the sensed rate deviate from the preset rate.
Claim 11
Dependent Claim
44 words
A control system according to claim 1, wherein said automatic shut-off mechanism includes a pilot valve actuated to one position by said electrical control system to turn-on the valve, and actuated to a second position by said electrical control system to turn-off the valve.
Claim 12
Dependent Claim
252 words
A control system for an automatic metering valve delivering a preset quantity of a fluid and including a housing for the valve; a rotary impeller disposed within the housing and rotatable at a velocity in accordance with the rate of delivery of the fluid; and an automatic shut-off mechanism for turning-off the valve when the present quantity of fluid has been delivered; said control system including sensible element disposed internally of the valve housing and rotated with the impeller, a sensor sensing element to produce electrical signals corresponding to the number of rotations thereof and of the impeller, a presettable counter circuit effective to count said electrical signals, and a switching circuit effective to actuate the valve shut-off mechanism to turn-off the valve when the counter circuit reaches a preset number corresponding to the present quantity of fluid to be delivered; said switching circuit including: a capacitor having a charging circuit and a discharging circuit; a switching device in the capacitor discharging circuit and have a control electrode effective to fire the switching device and thereby to cause the capacitor to discharge; and a relay having a winding in the capacitor charging circuit and a pair of contacts in the capacitor discharging circuit, and contacts being normally closed when the capacitor is charged and the relay coil draws little current, and being automatically opened to interrupt the connection to the switching device when the capacitor has discharged causing the relay winding to draw a larger amount of current for recharging the capacitor.
Claim 13
Dependent Claim
252 words
A control system for an automatic metering valve delivering a preset quantity of a fluid and including a housing for the valve; a rotary impeller disposed within the housing and rotatable at a velocity in accordance with the rate of delivery of the fluid; and an automatic shut-off mechanism for turning-off the valve when the present quantity of fluid has been delivered; said control system including sensible element disposed internally of the valve housing and rotated with the impeller, a sensor sensing element to produce electrical signals corresponding to the number of rotations thereof and of the impeller, a presettable counter circuit effective to count said electrical signals, and a switching circuit effective to actuate the valve shut-off mechanism to turn-off the valve when the counter circuit reaches a preset number corresponding to the present quantity of fluid to be delivered; said switching circuit including: a capacitor having a charging circuit and a discharging circuit; a switching device in the capacitor discharging circuit and have a control electrode effective to fire the switching device and thereby to cause the capacitor to discharge; and a relay having a winding in the capacitor charging circuit and a pair of contacts in the capacitor discharging circuit, and contacts being normally closed when the capacitor is charged and the relay coil draws little current, and being automatically opened to interrupt the connection to the switching device when the capacitor has discharged causing the relay winding to draw a larger amount of current for recharging the capacitor.
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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |