Patent US3696629A successfully refreshed from Google Patents.
US3696629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning system
Assignee: Individual
•
Filing: 1971-04-12
•
Granted: 1972-10-10
•
Expires: 1991-04-12
Abstract
Abstract An air conditioning system including the usual air heating and air cooling means, blowers, electrical controls and the addition of a means for removing sulfur oxide compounds from the air. The sulfur oxide compounds are media removed by forcing the air through a fabric or belt wetted with an alkaline hydroxide water solution. Automatic means replenish the hydroxide solution when it is exhaused.
Inventors
- 👤 Russell G Heston Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/501; F; F24; F24F; F24F8/00; F24F8/10; F24F8/117; F24F8/125
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
27 words
An air conditioning control system as claimed in claim 1 wherein a supply of alkaline hydroxide tablets is available in the housing for replenishing the aqueous solution.
Claim 2
Dependent Claim
25 words
A system as claimed in claim 2 wherein a sensing means is immersed in the aqueous solution for determining the pH number of the solution.
Claim 3
Dependent Claim
21 words
A system as claimed in claim 3 wherein said sensing means includes a pair of electrodes, an amplifier and a relay.
Claim 4
Dependent Claim
41 words
A system as claimed in claim 3 wherein said alkaline hydroxide tablets are contained in a storage conduit positioned above the aqueous solution and are released to fall into the solution when the sensing means operates to indicate a spent solution.
Claim 5
Dependent Claim
25 words
A system as claimed in claim 5 wherein a slide dispenser, operated by an electric solenoid, liberates one tablet at a time to the solution.
Claim 6
Dependent Claim
71 words
A system as claimed in claim 5 wherein an automatic control means drains the tank of spent solution, fills the tank with water, and then drops an alkaline hydroxide tablet into the water, said control means including a motor started by the sensing means, and a series of cams turned by the motor for operating contacts and solenoids, said solenoids coupled respectively to a waste valve and said tablet slide dispenser.
Claim 7
Dependent Claim
45 words
A system as claimed in claim 7 wherein an exterior port is connected to the system whereby outside air may be introduced into the system, and automatic control means to regulate the quantity of said introduced outside air by regulating the opening of said port.
Claim 8
Dependent Claim
24 words
A system as claimed in claim 1 wherein the alkaline hydroxide contains a metal of the group consisting of sodium, lithium, potassium, and calcium.
Claim 9
Dependent Claim
24 words
A system as claimed in claim 1 wherein the system includes an evaporator coil for cooling the air after passage through the endless belt.
References Cited (Backward Citations)
US3454354A
Cited
US3522000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |