US3938115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination smoke and heat detector alarm
Assignee: EVERGARD FIRE ALARM CO Inc
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Filing: 1974-06-13
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Granted: 1976-02-10
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Expires: 1994-06-13
Abstract
Abstract A combination smoke and heat detector alarm including a self contained stored energy source in the form of a cylinder of compressed gas. A T-fitting connects to the cylinder and feeds separate conduit systems leading to individual sounding devices. A fusible element is interposed in one of the conduit systems to automatically permit transfer of the compressed gas to a first sounding device upon the presence of elevated temperatures. A solenoid operated switch is interposed in the other conduit system to normally prevent the flow of gas. The solenoid is responsive to a smoke detector and is wired to open the solenoid valve upon sensing the presence of a predetermined concentration of smoke.
Inventors
- 👤 Sidney Jacoby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:26
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10; G08B17/06; G08B17/11; G08B17/113; G08B3/00; G08B3/06
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
40 words
In a combination smoke and heat detector alarm, the combination of A. a self contained source of energy, 1. said source including an energy outlet, 2. said source being compressed gas; B. a first conduit system communicating with the outlet,
Claim 2
Dependent Claim
40 words
In a combination smoke and heat detector alarm, the combination of A. a self contained source of energy, 1. said source including an energy outlet, 2. said source being compressed gas; B. a first conduit system communicating with the outlet,
Claim 3
Dependent Claim
124 words
said first conduit system including a first sounding device, said first sounding device being a gas operated horn, 2. said first conduit system including first valve means to regulate the flow of energy from the source to the first sounding device, 3. said first valve means being movable by non-electrical energy from a closed condition to an open condition upon sensing a predetermined high temperature in the vicinity of the alarm; and C. a second conduit system communicating with the said outlet, 1. said second conduit system including a second sounding device, said second sounding device being a gas operated horn, 2. said second conduit system including second valve means to regulate the flow of energy from the source to the second sounding device,
Claim 4
Dependent Claim
124 words
said first conduit system including a first sounding device, said first sounding device being a gas operated horn, 2. said first conduit system including first valve means to regulate the flow of energy from the source to the first sounding device, 3. said first valve means being movable by non-electrical energy from a closed condition to an open condition upon sensing a predetermined high temperature in the vicinity of the alarm; and C. a second conduit system communicating with the said outlet, 1. said second conduit system including a second sounding device, said second sounding device being a gas operated horn, 2. said second conduit system including second valve means to regulate the flow of energy from the source to the second sounding device,
Claim 5
Dependent Claim
30 words
said second valve means being movable by electrical energy from a closed position to an open position upon sensing a predetermined quantity of smoke in the vicinity of the alarm.
Claim 6
Dependent Claim
30 words
said second valve means being movable by electrical energy from a closed position to an open position upon sensing a predetermined quantity of smoke in the vicinity of the alarm.
Claim 7
Dependent Claim
21 words
The alarm of claim 1 wherein there is no direct connection between the first sounding device and the second sounding device.
Claim 8
Dependent Claim
39 words
The alarm of claim 1 wherein the first valve means comprise a fusible element, said fusible element melting upon the presence of elevated temperatures to move the first valve means from the said closed condition to the open condition.
Claim 9
Dependent Claim
17 words
The alarm of claim 3 wherein the first valve means positions entirely within the first conduit system.
Claim 10
Dependent Claim
16 words
The alarm of claim 1 wherein the second valve means include an electrically powered smoke detector.
Claim 11
Dependent Claim
57 words
The alarm of claim 5 wherein the second valve means include a solenoid operated valve, said valve being normally closed to prevent the flow of compressed gas through the second conduit system, said valve being opened by the smoke detector upon detection of the predetermined concentration of smoke, said valve being positioned within the second conduit system.
Claim 12
Dependent Claim
69 words
The alarm of claim 6 and a fitting attached to the outlet, said fitting having a single inlet connection to receive compressed gas from the outlet, said fitting having a first connection to the first conduit system and a second connection to the second conduit system, the said first connection, second connection and the inlet connection being interiorly interconnected to simultaneously pressurize both the first and second conduit systems.
Claim 13
Dependent Claim
32 words
The alarm of claim 7 wherein the first and second conduit systems include means to simultaneously conduct energy to the first and second sounding devices whereby the horns can be operated simultaneously.
Claim 14
Dependent Claim
29 words
The alarm of claim 8 wherein the means to conduct energy to the first and second sounding devices include means to function the first and second valve means simultaneously.
Claim 15
Dependent Claim
29 words
The alarm of claim 8 wherein the means to conduct energy to the first and second sounding device include means to function the first and second valve means individually.
Claim 16
Dependent Claim
42 words
The alarm of claim 1 wherein one horn generates a sound of intensity in the range of 115 DBa and wherein the alarm includes means to increase the intensity of the sound by a range of approximately 78 percent to 130 percent.
Claim 17
Dependent Claim
22 words
The alarm of claim 13 wherein wherein the means to increase include means to function the first and second sounding devices simultaneously.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |