US2724400A - Siphoning tongue for radiator vent valves - Google Patents
Siphoning tongue for radiator vent valves Download PDFInfo
- Publication number
- US2724400A US2724400A US192794A US19279450A US2724400A US 2724400 A US2724400 A US 2724400A US 192794 A US192794 A US 192794A US 19279450 A US19279450 A US 19279450A US 2724400 A US2724400 A US 2724400A
- Authority
- US
- United States
- Prior art keywords
- valve
- tongue
- nipple
- casing
- radiator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000002445 nipple Anatomy 0.000 description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000010276 construction Methods 0.000 description 9
- 238000005192 partition Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/08—Arrangements for drainage, venting or aerating
- F24D19/081—Arrangements for drainage, venting or aerating for steam heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
- F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
- F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
- F16K24/044—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float the float being rigidly connected to the valve element, the assembly of float and valve element following a substantially translational movement when actuated, e.g. also for actuating a pilot valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2931—Diverse fluid containing pressure systems
- Y10T137/3003—Fluid separating traps or vents
- Y10T137/3084—Discriminating outlet for gas
- Y10T137/309—Fluid sensing valve
- Y10T137/3093—With vaporized liquid stop
- Y10T137/3096—With separate return for condensate
Definitions
- This invention relates to new and useful improvements in vent valves for. steam radiators and more particularly to a vent valve having an improved siphon tongue atrangement for efiecting more rapid and efiicient drainage of liquid from the valve casing back into the radiator.
- Vent valves for steam heating systems are almost as old I as the art of steam heating itself since from the earliest days the necessity of venting air from radiators at the start of a new cycle of operation was recognized.
- the earliest types of radiator vent valves comprised a casing having an inlet nipple for attachment to a radiator,
- Another object is to provide an air vent valve having an improved means for siphoning condensed water from the valve casing back into the radiator.
- Another object is to provide an air vent valve having a siphoning member which is movably positioned external to the valve inlet nipple.
- Another object is to provide an improved siphoning tongue for air vent valves which is simply and inexpensively constructed and simple to install on such a valve.
- This invention comprises the new and improved construction and combination of parts to be more fully described hereinafter and the novelty of which will be particularly pointed out and distinctly claimed.
- draw- 1ng Figure 1 is a view in central section of an air vent valve embodying this invention and showing the valve actuating float in elevation with a corner thereof shown in broken section,
- Fig. 2 is a sectional view of the inlet nipple of the valve shown in Fig. 1 taken on the section line 22 and showing the improved siphon tongue member,
- Fig. 3 is a sectional view taken on the line 3--3 of Fig. 1 showing in enlarged detail the mounting of the siphon tongue on its pivot member, and
- Fig. 4 is a fragmentary sectional view of the inlet nipple and siphon tongue of the valve shown in Fig. 1 show ing the same assembled on a radiator.
- a radiator air vent valve generally designated 1 comprising a casing 2 having a bottom wall 3. Secured in an aperture in the side wall of the casing 2 there is provided an inlet nipple 4 for connection to a radiator 5 as shown in Fig. 4. At the top of the casing 2 a valve port member 6 is secured in an aperture in the casing and provides a valve port 7 and seat 8 for conable thermostatic material contained therein.
- member 9 is secured in the member 6 and has a knob member 10 and indicator 11 threadedly secured thereon for adjustment.
- the member 9 has a small oulet aperture 12 and larger apertures 13 opening into an outlet passage 14 providing an adjustable means for determining the size of the venting port.
- a float member 15 Positioned within the casing 2 there is a float member 15 which carries a valve member 16 cooperable with the valve seat 8 to close off flow from the casing, The float member 15 rests upon a threaded adjustable abutment 17 which is operable to determine the amount of travel of the valve member 16 required to close the outlet port 7.
- the abutment member 17 is preferably soldered in position as at 18 after original adjustment by the manufacturer.
- the bottom wall 19 of the float 15 is dished inwardly and provides a diaphragm responsive to expansion of a gas or other suit-
- the inlet nipple 4 has a pair of oppositely positioned recesses or apertures 20.
- a siphon tongue member 21 of generally semi-cylindrical construction is positioned entirely outside the end of the inlet nipple 4 and is supported by a hairpin shaped wire 22 having outwardly bent ends 23 inserted into the apertures 20 for pivotal connection to the nipple 4.
- the tongue member 21 has a portion 24 cut and bent inward to receive the rebent end 25 of the hairpin member 22 and provides a compression connection thereto.
- the tongue member 21 may be rotated to a point substantially below the passage through the nipple 4, as is shown in Fig. 1, but may be pivoted upward to facilitate insertion into a radiator, as shown in Fig. 4.
- valve casing 2 In operation the valve casing 2 is connected by the nipple 4 to the radiator 5 as shown in Fig. 4. With the outlet valve port 7 positioned upright the valve port is initially open and as steam enters the radiator, air is permitted to vent from the valve. When steam reaches the valve the float member 15 is heated and the pressure therein expands the bottom wall or diaphragm 19 thus raising the valve member 16 to a closed position against the valve seat 8. If sufiicient steam condenses within the casing 2to buoy up or raise the float member 15 to its heat 8, the water will act to hold the valve member 16 in closed position independently of temperature.
- the siphon tongue 21 which is positioned entirely external to the casing nipple 4 engages the edge of the radiator aperture in which the nipple 4 is secured to confine the fiow of water from the valve into a stream separated from the incoming steam at the point of entry to the radiator.
- this siphon tongue arrangement eliminates the necessity of an internal partition within the nipple 4 or the provision of a siphon tube.
- This construction is very simple to manufacture and the pivotal hairpin member 22 is easily positioned in the nippie 4 by merely compressing the legs thereof together, slipping the same through the nipple and allowing the outwardly bent portions 23 to spring into the pivot recesses 20.
- a casing having an outlet port, an automatic valve in said casing and operable to close said outlet port, an inlet nipple projecting from and opening into said casing, siphoning means comprising a tongue member of downwardly open channellike lateral cross-section positioned entirely external of said nipple and outside said casing and adapted to engage an interior wall of a radiator to direct the drainage flow of water draining from said casing, and a supporting wire member pivotally secured in said nipple and supporting said tongue member for pivotal movement in said external position.
- a casing having an outlet port, an adjustable plug member cooperable with said outlet port for varying the size thereof, a valve member in said casing cooperable with and operable to close said port, a fioat member supporting said valve member and operable to close said port upon predetermined rise in the level of condensed Water in said casing, an inlet nipple secured to and opening into said casing, said nipple being adapted to be secured in an aperture connection to a radiator to conduct air and steam from the radiator to said casing and to permit drainage of water from said casing back into the radiator, said nipple having a pair of oppositely positioned holes therein, a hairpinshaped member of wire having the ends of its legs bent outward to fit in the holes in said nipple to provide a pivotal connection and having its rebent end extending beyond the end of said nipple outside said casing, a tongue member of semi-cylindrical lateral cross-section having its convex
- An air vent valve comprising a casing having an outlet port and a, laterally extending inlet nipple positioned below said port and adapted to be inserted into a vent port, a valve member in said casing and operable to control flow from said outlet port, a tongue member positioned entirely external of said nipple and comprising a downwardly open channel-like member extending longitudinally of said nipple, a supporting member extending from said nipple and having one end portion secured to and lying against said tongue member, and means pivotally securing said supporting member for vertical movement of said tongue member relative to said nipple such that the longitudinal side edges of said tongue member will engage and rest upon the wall of said vent port.
- a casing having a laterally extending inlet nipple and a siphoning means carried by said nipple, said siphoning means comprising a tongue member positioned entirely external of said nipple and a resilient rebent supporting wire having oppositely positioned outturned ends, said nipple having oppositely and horizontally positioned sockets pivotally receiving said out-turned ends, the rebent end portion of said Wire extending out of said nipple, said tongue member being av channel-like downwardly open sheet material member having a transverse bridging portion receiving said rebent wire portion, said tongue member being held tightly upon said supporting wire by the resilient engagement of said rebent portion with said bridge portion and said tongue member.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Description
Nov. 22, 1955 w. F. RUFFER SIPHONING TONGUE FOR RADIATOR VENT VALVES Filed Oct. 28, 1950 FIG 4 FIG. 3
INVENTOR. 1 :77 My BY QM M 4/ A TORNEY FIG.2
United States Patent Ofifice 2,724,400 Patented Nov. 22, 1955 SIPHONING TONGUE non RADIATOR VENT VALVES Walter F. Rulrer, Birmingham, Mich., assignor to Detroit Controls Corporation, a corporation of Michigan Application October 28, 1950, Serial No. 192,794
4 Claims. (Cl. 137-201) This inventionrelates to new and useful improvements in vent valves for. steam radiators and more particularly to a vent valve having an improved siphon tongue atrangement for efiecting more rapid and efiicient drainage of liquid from the valve casing back into the radiator.
Vent valves for steam heating systems are almost as old I as the art of steam heating itself since from the earliest days the necessity of venting air from radiators at the start of a new cycle of operation was recognized. The earliest types of radiator vent valves comprised a casing having an inlet nipple for attachment to a radiator,
having, an outlet valve port and an outlet valve operated usually by a thermostatic member which was also a float for providing response to rise in liquid level in the valve casing. It was found almost from the start however, that when a vent valve casing became filled to a considerable extent with condensed water, there was a necessity for providing some means to assist the flow of water from the valve casing back into the radiator. To provide such a drainage assisting means siphon tubes were resorted to such as is shown in Patent 823,632 to one E. .H. Packard. The siphon tube vent valve thereupon became the standard commercial valve and was used generally by most vent valve manufacturers until about 1940.
Over a period of time, however, steam radiators were made smaller and more compact and eventually the installation of. siphon tube vent valves became so difficult that a new type of valve was devised to meet the problem of installation. It was discovered that the difficulties of the siphon tube valve could be eliminated and a more compact valve constructed by use of a tongue member which formed a partition across the inlet nipple to the valve and which extended beyond theend of the nipple into the radiator thus providing divided passages for inlet of steam and outlet of water to and from the valve casing. One of the earliest valves using a partition construction of this type is shown in Patent 2,057,041 to McDonough et al. Subsequent improvements in construction recognized the necessity for the partition to extend beyond the end of the inlet nipple and are set forth in Patent. 2,289,218 to Simpson, 2,338,495 to Davies and 2,284,137 to Eggleston. It was later discovered and shown in Patent 2,368,712 to Jehle that more efiicient siphoning of liquid from the vent valve could be accomplished if the end of the siphoning tongue extended into the radiator and to a lower level than the inlet nipple to the valve thus providing a siphoning action more analogous to a siphon tube construction. In all of the prior valves it has been thought necessary to completely divide the flow of steam from the flow of water to permit proper siphoning of water from the valve casing. Applicant has found that this construction is not necessary and that vent valves can be made to drain properly without either a siphon tube or internal tongue or partition.
Accordingly, it is one object of this invention to provide a radiator air vent valve of new and improved construction.
Another object is to provide an air vent valve having an improved means for siphoning condensed water from the valve casing back into the radiator.
Another object is to provide an air vent valve having a siphoning member which is movably positioned external to the valve inlet nipple.
Another object is to provide an improved siphoning tongue for air vent valves which is simply and inexpensively constructed and simple to install on such a valve.
Other objects will become apparent from time to time throughout the specification and claims as hereinafter related.
This invention comprises the new and improved construction and combination of parts to be more fully described hereinafter and the novelty of which will be particularly pointed out and distinctly claimed.
In the accompanying drawing to be taken as part of this specification, there is clearly and fully illustrated a preferred embodiment of this invention in which draw- 1ng Figure 1 is a view in central section of an air vent valve embodying this invention and showing the valve actuating float in elevation with a corner thereof shown in broken section,
Fig. 2 is a sectional view of the inlet nipple of the valve shown in Fig. 1 taken on the section line 22 and showing the improved siphon tongue member,
Fig. 3 is a sectional view taken on the line 3--3 of Fig. 1 showing in enlarged detail the mounting of the siphon tongue on its pivot member, and
Fig. 4 is a fragmentary sectional view of the inlet nipple and siphon tongue of the valve shown in Fig. 1 show ing the same assembled on a radiator.
Referring to the drawing by characters of reference there is shown a radiator air vent valve generally designated 1 comprising a casing 2 having a bottom wall 3. Secured in an aperture in the side wall of the casing 2 there is provided an inlet nipple 4 for connection to a radiator 5 as shown in Fig. 4. At the top of the casing 2 a valve port member 6 is secured in an aperture in the casing and provides a valve port 7 and seat 8 for conable thermostatic material contained therein.
member 9 is secured in the member 6 and has a knob member 10 and indicator 11 threadedly secured thereon for adjustment. The member 9 has a small oulet aperture 12 and larger apertures 13 opening into an outlet passage 14 providing an adjustable means for determining the size of the venting port. Positioned within the casing 2 there is a float member 15 which carries a valve member 16 cooperable with the valve seat 8 to close off flow from the casing, The float member 15 rests upon a threaded adjustable abutment 17 which is operable to determine the amount of travel of the valve member 16 required to close the outlet port 7. The abutment member 17 is preferably soldered in position as at 18 after original adjustment by the manufacturer. The bottom wall 19 of the float 15 is dished inwardly and provides a diaphragm responsive to expansion of a gas or other suit- The inlet nipple 4 has a pair of oppositely positioned recesses or apertures 20. A siphon tongue member 21 of generally semi-cylindrical construction is positioned entirely outside the end of the inlet nipple 4 and is supported by a hairpin shaped wire 22 having outwardly bent ends 23 inserted into the apertures 20 for pivotal connection to the nipple 4. The tongue member 21 has a portion 24 cut and bent inward to receive the rebent end 25 of the hairpin member 22 and provides a compression connection thereto. The tongue member 21 may be rotated to a point substantially below the passage through the nipple 4, as is shown in Fig. 1, but may be pivoted upward to facilitate insertion into a radiator, as shown in Fig. 4.
In operation the valve casing 2 is connected by the nipple 4 to the radiator 5 as shown in Fig. 4. With the outlet valve port 7 positioned upright the valve port is initially open and as steam enters the radiator, air is permitted to vent from the valve. When steam reaches the valve the float member 15 is heated and the pressure therein expands the bottom wall or diaphragm 19 thus raising the valve member 16 to a closed position against the valve seat 8. If sufiicient steam condenses within the casing 2to buoy up or raise the float member 15 to its heat 8, the water will act to hold the valve member 16 in closed position independently of temperature. The siphon tongue 21 which is positioned entirely external to the casing nipple 4 engages the edge of the radiator aperture in which the nipple 4 is secured to confine the fiow of water from the valve into a stream separated from the incoming steam at the point of entry to the radiator.
The exact theory of operation of this siphon tongue arrangement is not known but it has been found that a proper siphon action is obtained by this construction which eliminates the necessity of an internal partition within the nipple 4 or the provision of a siphon tube. This construction is very simple to manufacture and the pivotal hairpin member 22 is easily positioned in the nippie 4 by merely compressing the legs thereof together, slipping the same through the nipple and allowing the outwardly bent portions 23 to spring into the pivot recesses 20.
Having thus described the invention what is claimed and desired to be secured by Letters Patent of the United States is:
1. In a radiator air vent valve, a casing having an outlet port, an automatic valve in said casing and operable to close said outlet port, an inlet nipple projecting from and opening into said casing, siphoning means comprising a tongue member of downwardly open channellike lateral cross-section positioned entirely external of said nipple and outside said casing and adapted to engage an interior wall of a radiator to direct the drainage flow of water draining from said casing, and a supporting wire member pivotally secured in said nipple and supporting said tongue member for pivotal movement in said external position.
I 2. In a radiator air vent valve, a casing having an outlet port, an adjustable plug member cooperable with said outlet port for varying the size thereof, a valve member in said casing cooperable with and operable to close said port, a fioat member supporting said valve member and operable to close said port upon predetermined rise in the level of condensed Water in said casing, an inlet nipple secured to and opening into said casing, said nipple being adapted to be secured in an aperture connection to a radiator to conduct air and steam from the radiator to said casing and to permit drainage of water from said casing back into the radiator, said nipple having a pair of oppositely positioned holes therein, a hairpinshaped member of wire having the ends of its legs bent outward to fit in the holes in said nipple to provide a pivotal connection and having its rebent end extending beyond the end of said nipple outside said casing, a tongue member of semi-cylindrical lateral cross-section having its convex face upward and positioned external to said nipple, means securing said tongue member to the rebent end of said hairpin-shaped member to support the same in said external position, and said tongue member being adapted to engage an interior wall of a radiator to direct the drainage flow of water from said casing.
3. An air vent valve comprising a casing having an outlet port and a, laterally extending inlet nipple positioned below said port and adapted to be inserted into a vent port, a valve member in said casing and operable to control flow from said outlet port, a tongue member positioned entirely external of said nipple and comprising a downwardly open channel-like member extending longitudinally of said nipple, a supporting member extending from said nipple and having one end portion secured to and lying against said tongue member, and means pivotally securing said supporting member for vertical movement of said tongue member relative to said nipple such that the longitudinal side edges of said tongue member will engage and rest upon the wall of said vent port.
4. In an air vent valve, a casing having a laterally extending inlet nipple and a siphoning means carried by said nipple, said siphoning means comprising a tongue member positioned entirely external of said nipple and a resilient rebent supporting wire having oppositely positioned outturned ends, said nipple having oppositely and horizontally positioned sockets pivotally receiving said out-turned ends, the rebent end portion of said Wire extending out of said nipple, said tongue member being av channel-like downwardly open sheet material member having a transverse bridging portion receiving said rebent wire portion, said tongue member being held tightly upon said supporting wire by the resilient engagement of said rebent portion with said bridge portion and said tongue member.
References Cited in the file of this patent Jehle et al. Feb. 6,
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US192794A US2724400A (en) | 1950-10-28 | 1950-10-28 | Siphoning tongue for radiator vent valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US192794A US2724400A (en) | 1950-10-28 | 1950-10-28 | Siphoning tongue for radiator vent valves |
Publications (1)
Publication Number | Publication Date |
---|---|
US2724400A true US2724400A (en) | 1955-11-22 |
Family
ID=22711065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US192794A Expired - Lifetime US2724400A (en) | 1950-10-28 | 1950-10-28 | Siphoning tongue for radiator vent valves |
Country Status (1)
Country | Link |
---|---|
US (1) | US2724400A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10006642B2 (en) | 2014-05-09 | 2018-06-26 | Jerritt L. Gluck | Systems and methods for controlling conditioned fluid systems in a built environment |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US888913A (en) * | 1906-08-03 | 1908-05-26 | Fred W Leuthesser | Valve for radiators. |
US2246765A (en) * | 1940-08-22 | 1941-06-24 | M S Little Mfg Company | Radiator vent valve |
US2287075A (en) * | 1939-07-15 | 1942-06-23 | Jas P Marsh Corp | Vent valve |
US2289218A (en) * | 1939-10-02 | 1942-07-07 | Hoffman Specialty Company | Siphonless vent valve |
US2338495A (en) * | 1940-10-10 | 1944-01-04 | Hoffman Specialty Co Inc | Radiator vent valve |
US2368712A (en) * | 1942-07-01 | 1945-02-06 | Hoffman Specialty Co | Vent valve for steam radiators |
-
1950
- 1950-10-28 US US192794A patent/US2724400A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US888913A (en) * | 1906-08-03 | 1908-05-26 | Fred W Leuthesser | Valve for radiators. |
US2287075A (en) * | 1939-07-15 | 1942-06-23 | Jas P Marsh Corp | Vent valve |
US2289218A (en) * | 1939-10-02 | 1942-07-07 | Hoffman Specialty Company | Siphonless vent valve |
US2246765A (en) * | 1940-08-22 | 1941-06-24 | M S Little Mfg Company | Radiator vent valve |
US2338495A (en) * | 1940-10-10 | 1944-01-04 | Hoffman Specialty Co Inc | Radiator vent valve |
US2368712A (en) * | 1942-07-01 | 1945-02-06 | Hoffman Specialty Co | Vent valve for steam radiators |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10006642B2 (en) | 2014-05-09 | 2018-06-26 | Jerritt L. Gluck | Systems and methods for controlling conditioned fluid systems in a built environment |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1874803A (en) | Heat exchange mechanism | |
US2331431A (en) | Automatic air vent valve for hot water systems | |
US2724400A (en) | Siphoning tongue for radiator vent valves | |
US1756688A (en) | Automatic fluid-temperature-control valve | |
US1958224A (en) | Humidifying apparatus | |
US2106512A (en) | Air vent | |
US1983294A (en) | Air conditioning unit | |
US2900645A (en) | Means for preventing condensation on flush-tanks | |
US2340220A (en) | Valve | |
US1977821A (en) | Humidifying device | |
US2168999A (en) | Thermostatic construction | |
US2028173A (en) | Control for radiators | |
US2270934A (en) | Control for refrigerating devices | |
US3963177A (en) | Thermostatic control valve for a one-pipe steam system | |
US2543978A (en) | Thermostatic regulator valve | |
US2216806A (en) | Valve setting means | |
US1674268A (en) | Air vent for radiators | |
US1509928A (en) | Thermostatic controlling device for hot-water-boiler heaters | |
US2581146A (en) | Boiler feedwater system | |
US1714199A (en) | Return trap | |
US2222324A (en) | Air valve for radiators | |
US2057041A (en) | Radiator valve for steam heating systems | |
US1338916A (en) | Humidifying device | |
US1557997A (en) | Humidity pan | |
US1954942A (en) | Combined radiator valve and humidifier |