US3835931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discharge head and fire protection system utilizing same whereby the head is actuatable in response to two separate temperatures
Assignee: Individual
•
Filing: 1973-11-02
•
Granted: 1974-09-17
•
Expires: 1993-11-02
Abstract
Abstract A discharge head for use in a fire protection system wherein the head is normally closed and a fire responsive device is adapted to open same in response to a first predetermined fire condition. A second fire responsive device opens the head in response to a second predetermined fire condition and a control selectively controls the operation of the first and second fire responsive devices.
Inventors
- 👤 W Livingston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:47
CPC Classifications
A; A62; A62C; A62C37/00; A62C37/08; A62C37/10
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
97 words
A discharge head for use in a fire protection system comprising a body member having an inlet for connecting to a source of extinguishant and an outlet, means normally preventing the discharge of extinguishant from said outlet, first fire responsive means adapted to permit the discharge of extinguishant from said outlet in response to a first predetermined fire condition, second fire responsive means adapted to permit the discharge of extinguishant from said outlet in response to a second predetermined fire condition, and control means for selectively controlling the operation of said first and second fire responsive means.
Claim 2
Dependent Claim
97 words
A discharge head for use in a fire protection system comprising a body member having an inlet for connecting to a source of extinguishant and an outlet, means normally preventing the discharge of extinguishant from said outlet, first fire responsive means adapted to permit the discharge of extinguishant from said outlet in response to a first predetermined fire condition, second fire responsive means adapted to permit the discharge of extinguishant from said outlet in response to a second predetermined fire condition, and control means for selectively controlling the operation of said first and second fire responsive means.
Claim 3
Dependent Claim
53 words
The head of claim 1 wherein said first predetermined fire condition is the existence of a first predetermined temperature in the space to be protected from fire and said second predetermined fire condition is the existence of a second predetermined temperature in said space of a greater value than said first predetermined temperature.
Claim 4
Dependent Claim
30 words
The head of claim 1 wherein said control means selectively controls the operation of said first and second fire responsive means in response to a predetermined conditon of said system.
Claim 5
Dependent Claim
32 words
The head of claim 1 wherein said control means selectively controls the operation of said first and second fire responsive means in response to a predetermined extinguishant pressure existing in said head.
Claim 6
Dependent Claim
35 words
The head of claim 4 wherein said control means is adapted to permit the operation of said first fire responsive means in response to the extinguishant pressure in said head exceeding a first predetermined value.
Claim 7
Dependent Claim
60 words
The head of claim 5 wherein said control means is adapted to defeat the operation of said first fire responsive means and permit the operation of said second fire responsive means in response to the extinguishant pressure in said head being lower than said first predetermined value and greater than a second predetermined value lower than said first predetermined value.
Claim 8
Dependent Claim
33 words
The head of claim 6 wherein said control means prevents the discharge of extinguishant from said outlet in the event the extinguishant pressure in said head is below said second predetermined fire conditions.
Claim 9
Dependent Claim
42 words
The head of claim 7 further comprising third fire responsive means responsive to a third predetermined fire condition for permitting the discharge of extinguishant from said outlet despite the extinguishant pressure in said head being below said first and second predetermined values.
Claim 10
Dependent Claim
58 words
The head of claim 8 wherein said first, second and third predetermined fire conditions are in the form of first, second and third predetermined temperatures, respectively, occurring in the space to be protected from fire, said second predetermined temperature being greater than said first predetermined temperature and said third predetermined temperature being greater than said second predetermined temperature.
Claim 11
Dependent Claim
111 words
A fire protection system comprising a plurality of discharge heads mounted in an elevated position relative to the space to be protected from fire, means for connecting said heads to a source of pressurized extinguishant, means normally preventing the discharge of extinguishant from said heads, first fire responsive means adapted to selectively open said heads to permit the discharge of extinguishant therefrom in response to a first predetermined fire condition, second fire responsive means adapted to selectively open said heads to permit the discharge of extinguishant therefrom in response to a second predetermined fire condition, and control means for selectively controlling the operation of said first and second fire responsive means.
Claim 12
Dependent Claim
111 words
A fire protection system comprising a plurality of discharge heads mounted in an elevated position relative to the space to be protected from fire, means for connecting said heads to a source of pressurized extinguishant, means normally preventing the discharge of extinguishant from said heads, first fire responsive means adapted to selectively open said heads to permit the discharge of extinguishant therefrom in response to a first predetermined fire condition, second fire responsive means adapted to selectively open said heads to permit the discharge of extinguishant therefrom in response to a second predetermined fire condition, and control means for selectively controlling the operation of said first and second fire responsive means.
Claim 13
Dependent Claim
48 words
The system of claim 10 wherein said first predetermined fire condition is the existence of a first predetermined temperature in said space and said second predetermined fire condition is the existence of a second predetermined temperature in said space of a greater value than said first predetermined tEmperature.
Claim 14
Dependent Claim
30 words
The system of claim 10 wherein said control means selectively controls the operation of said first and second fire responsive means in response to a predetermined condition of said system.
Claim 15
Dependent Claim
32 words
The system of claim 10 wherein said control means selectively controls the operation of said first and second fire responsive means in response to a predetermined extinguishant pressures existing in said heads.
Claim 16
Dependent Claim
27 words
The system of claim 10 wherein said first and second fire responsive means comprises a first and second fire responsive devices associated with each of said heads.
Claim 17
Dependent Claim
39 words
The system of claim 14 wherein said control means is adapted to permit the operation of first fire responsive device associated with a particular head in response to the extinguishant pressure in said head exceeding a first predetermined value.
Claim 18
Dependent Claim
61 words
The system of claim 15 wherein said control means is adapted to defeat the operation of said first fire responsive device and permit the operation of its corresponding second fire responsive device in response to the extinguishant pressure in said head being lower than said first predetermined value and greater than a second predetermined value lower than said first predetermined value.
Claim 19
Dependent Claim
43 words
The system of claim 16 wherein said control means prevents the discharge of extinguishant from said head in the event the extinguishant pressure in said head is below said second predetermined value despite the existence of said first or second predetermined fire conditions.
Claim 20
Dependent Claim
47 words
The system of claim 17 further comprising third fire responsive means associated with each head and responsive to a third predetermined fire condition for permitting the discharge of extinguishant from said head despite the extinguishant pressure in said head being below said first and second predetermined values.
Claim 21
Dependent Claim
58 words
The system of claim 18 wherein said first, second and third predetermined fire conditions are in the form of first, second and third predetermined temperatures, respectively, occurring in the space to be protected from fire, said second predetermined temperature being greater than said first predetermined temperatures and said third predetermined temperature being greater than said second predetermined temperature.
Claim 22
Dependent Claim
103 words
A discharge head for use in a fire protection system, said head comprising a closure member normally closing said head to prevent the discharge of extinguishant from said head, first means for opening said head in response to the existence of both a first predetermined fire condition in the space to be protected and a first predetermined condition of said system, and second means for opening said head in response to the existence of both a second predetermined fire condition in said space and a second predetermined condition of said system in the event said head is not opened by said first means.
Claim 23
Dependent Claim
103 words
A discharge head for use in a fire protection system, said head comprising a closure member normally closing said head to prevent the discharge of extinguishant from said head, first means for opening said head in response to the existence of both a first predetermined fire condition in the space to be protected and a first predetermined condition of said system, and second means for opening said head in response to the existence of both a second predetermined fire condition in said space and a second predetermined condition of said system in the event said head is not opened by said first means.
Claim 24
Dependent Claim
36 words
The head of claim 20 further comprising third means responsive to a third predetermined fire condition for opening said head in the event said head is not opened by said first means and said second means.
Claim 25
Dependent Claim
40 words
The head of claim 20 wherein said first predetermined fire condition is a first predetermined temperature in said space and wherein said second predetermined fire condition is a second predetermined temperature in said space higher than said first predetermined temperature.
Claim 26
Dependent Claim
49 words
The head of claim 22 further comprising third means responsive to a third predetermined temperature in said space for opening said head in the event said head is not opened by said first means and said second means, said third predetermined temperature being higher than said second predetermined temperature.
Claim 27
Dependent Claim
47 words
The head of claim 20 wherein said first predetermined condition of said system is a first predetermined extinguishant pressure in said system, and wherein said second predetermined condition of said system is a second predetermined extinguishant pressure in said system less than said first predetermined extinguishant pressure.
Claim 28
Dependent Claim
22 words
The heAd of claim 24 wherein said first and second predetermined extinguishant pressures are the pressures of the extinguishant in said head.
Claim 29
Dependent Claim
36 words
The head of claim 20 wherein said first means comprises means for retaining said closure member in an extinguishant discharge preventing position in said head, said retaining means being responsive to said first predetermined fire condition.
Claim 30
Dependent Claim
68 words
The head of claim 26 wherein said first predetermined condition of said system is a predetermined extinguishant pressure and wherein said first means further comprises connection means for connecting said plug means in said extinguishant discharge preventing position in said head, said connection means being adapted to release said closure member in response to a predetermined tension being placed thereon as a result of said predetermined extinguishant pressure.
Claim 31
Dependent Claim
23 words
The head of claim 27 wherein said second means comprises means to vary said tension in response to said second predetermined fire condition.
Claim 32
Dependent Claim
40 words
The head of claim 28 wherein said first predetermined fire condition is a first predetermined temperature in said space and wherein said second predetermined fire condition is a second predetermined temperature in said space higher than said first predetermined temperature.
Claim 33
Dependent Claim
113 words
A fire protection system comprising a plurality of discharge heads mounted in an elevated position relative to the space to be protected from fire, means for connecting said heads being normally closed and being adapted to open to discharge extinguishant, first means for selectively opening said heads in response to the existence of both a first predetermined fire condition in said space and a first predetermined condition of said system, and second means for selectively opening said heads in response to the existence of both a second predetermined fire condition in said space and a second predetermined condition of said system in the event said heads are not opened by said first means.
Claim 34
Dependent Claim
113 words
A fire protection system comprising a plurality of discharge heads mounted in an elevated position relative to the space to be protected from fire, means for connecting said heads being normally closed and being adapted to open to discharge extinguishant, first means for selectively opening said heads in response to the existence of both a first predetermined fire condition in said space and a first predetermined condition of said system, and second means for selectively opening said heads in response to the existence of both a second predetermined fire condition in said space and a second predetermined condition of said system in the event said heads are not opened by said first means.
Claim 35
Dependent Claim
36 words
The system of claim 30 further comprising third means responsive to a third predetermined fire condition for opening said heads in the event said heads are not opened by said first means and said second means.
Claim 36
Dependent Claim
40 words
The system of claim 31 wherein said first predetermined fire condition is a first predetermined temperature in said space and wherein said second predetermined fire condition is a second predetermined temperature in said space higher than said first predetermined temperature.
Claim 37
Dependent Claim
49 words
The system of claim 32 further comprising third means responsive to a third predetermined temperature in said space for opening said heads in the event said heads are not opened by said first means and said second means; said third predetermined temperature being higher than said second predetermined temperature.
Claim 38
Dependent Claim
47 words
The system of claim 30 wherein said first predetermined condition of said system is a first predetermined extinguishant pressure in said system, and wherein said second predetermined condition of said system is a second predetermined extinguishant pressure in said system less than said first predetermined extinguishant pressure.
Claim 39
Dependent Claim
22 words
The system of claim 34 wherein said first and second predetermined extinguishant pressures are the pressures of the extinguishant in said heads.
Claim 40
Dependent Claim
67 words
The system of claim 30 wherein each of said heads comprises a body member, and plug means in said body member for preventing the discharge of said extinguishant therefrom, and wherein said first means comprises means for retaining said plug means in an extinguishant discharge preventing position in said body member, said retaining means being responsive to said first predetermined fire condition for releasing said plug means.
Claim 41
Dependent Claim
74 words
The system of claim 36 wherein said first predetermined condition of said system is a predetermined extinguishant pressure in each of said heads, and wherein said first means further comprises connection means for connecting said plug means in an extinguishant discharge preventing position in said bOdy member, said connection means being adapted to release said plug means in response to a predetermined tension being placed thereon as a result of said predetermined extinguishant pressure.
Claim 42
Dependent Claim
23 words
The system of claim 37 wherein said second means comprises means to vary said tension in response to said second predetermined fire condition.
Claim 43
Dependent Claim
40 words
The system of claim 38 wherein said first predetermined fire condition is a first predetermined temperature in said space and wherein said second predetermined fire condition is a second predetermined temperature in said space higher than said first predetermined temperature.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |