US1105112A

US1105112A - Automatic steam-trap.

Info

Publication number: US1105112A
Application number: US56149910A
Authority: US
Inventors: Wilton Telfer
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-05-14
Filing date: 1910-05-14
Publication date: 1914-07-28
Anticipated expiration: 1931-07-28

Description

w', TELFBP.. AUTOMATIG STEAM TRAP.

APPLICATION FILED IAY 14, 1910. v 1,1 O5, 1 12. Patented July 28, 1914,

2 SHEETS-SHEET 1.

INUENTDH' Wilton. 'Ifer WMM/f WITNSSES THE NDRRIS PETES CO., PHOTU-LITHU.. WASHINGTON. D. C.

W. TBLPER. AUTOMATIC STEAM TRAP. ArPmoA'TIoN Hmm In 14. 1910.

Patented July 28, 1914.

2 SHEETS-SHEET 2.

UJITNEESEE TTM" INUENTDH M/ton Tegfer WILTON TEI'IFER, 0F WINNIFEG,'1VIANITOBA, CANADA.

AUTOMATIC STEAM-TRAP.

specification ofretters raam.`

Application filed May 14, 1910. Serial No. 561,499.

Patented July 28, .1914.

To all 'whom it may concern:

Be it known that I, WILToN TELFER, of the city of Vinnipeg, in theProvince of Manitoba, Canada, have invented certain new and useful Improvements in. Automatic Steam- Traps, of which the following is the speciication.

My invention relates to automaticsteam traps particularly adapted for use in either direct or indirect systems of steam heating principally in connection with railroad coaches.

The object of the invention is to provide an automatic self regulating steam trap which will drain olf condensed steam7 suchy tom-thereof, a cylindrical casing'having a hollow interior, and `provided with a removable top, the.' casing being connected to the steam pipe through a ball rand socket joint, a valve playing over a valve seat located in the bottomfof the casing, the valve stem extending downwardly and engaging normally with the bottom of thereservoir', a

bridge spanning the valve, a thermostat centered on the bridge, aspring passing bef` tween they thermostat andthe cover ofthe casing, and a hollow adjustable tube passing upwardly through the cover and carrying at its lower end a valve seat engageable with the upperface oflthethermostat, the parts being arranged and constructed as hereinafter `more particularly. described.

Figure 1 is a vertical sectional view centrally through the reservoir, the cylindrical casing being shown therein in side elevation. Fig. 2 is a horizontal sectional view through the reservoir and -casing,thesection being taken in the plane denoted` by the line X X@ Fig. 1. Fig. 3 is a vertical sectional view centrally through the casing.V Fig. 4 `is a plan view of the valve and `bridge detached from the casing. Fig. 5 vis a sectional view f of the ball and socket joint.

re'ctly beneath `the bridge.

In the-drawings like characters of reference indicate corresponding parts in each figure..

1 represents .a receptacle of any suitable formhaving a removable top 2 and'provided with a threaded opening 8 centrally and at one side which receives a steam pipe line 4 which lit will be'understood communi-r cates directly with the various radiators located within ka car. The casing is secured to a car in any kconvenient place so that any condensed liquidv in the pipe 4 drains to it by gravity; The cover carries ai screw plug 5 which is located directly over the kcylindrical casing shortly to be described. The bottom ofthe receptacle is provided witha downwardly directed. portion 1" in which is located centrallya draining opening 12 having an outwardly flaring upper end 13 from which passes ducts 1t surrounding the central opening. It is to be understood that the portion 1 with the opening and ducts can be` formed `integral with the bottom or sepa-y rately so as to screw to the same. Within the reservoir I have located a hollow cylindrical casing 6 having a removable top 7 and provided with a screw threaded opening 8 in the bottom thereof for a purpose later eX- plained. y The casing is connected to the receptacle by suitablehollowr pipes `9 and 10 united the one to the other by a-ball and socket joint 11.y The pipe 10 communicates with the pipe 4 so that there is a direct passage for steamthrough the pipe 4 to the interior of the casing.

, 12 is a bridge carried by the annular member 13 which has its inner and outer faces threaded,l the outer face being adapted to screw into thebpen end' 8 yof the casing already referred to..` i

14 is a'valve seat screwing into the mem" ber 13 and provided r-centrally with a spider 15 .which carries slidably the stem 16 of the valve 17 which plays on thevalve seat di- The bridge'is formed with a soclret'lS on which'is centered a thermostat 19 partially filled with van eX# pansible and contractible liquid 20. The thermostat is held in position by a spring 21 whichk passes between the upperface thereof and the cover 7.

22 'is a hollow ktube threaded into the cover 7 of the casing and heldin'any desired adjusted position by a lock nut 23. The tube has suitable niches 24 supplied in its upper end `whereby itcan be conveniently turned by a screw driver. The lower end of the tube is threaded at 25 and receives a threaded band 26 having an inwardly directed ange 27 thereon with a beveled edge which receives and holds the valve seat 28 tightly to the lower end of the tube. The valve seat 28 has an opening centrally which is continuous with the opening in the tube. The thermostat is adapted to seat on the valve seat 28.

29 is an adjusting screw threaded into the bridge 12 and adapted to engage with the upper face of the valve to limit its displacement.

30 are opposing guideways formed in the sides of the reservoir such guideways receiving projecting portions 31 extending from the casing.

lVhen the device is to be used the tube 23 is adjusted by removing the screw plug 5 and inserting a screw driver so that the thermostat will seat at any desired temperature. The screw 29 is adjusted so that the valve will seat at any desired pressure.

When the device is installed the casing rests in its lower position within the reservoir, that is, with the stem 16of the valve engaging with the bottom of the reservoir so that the valve is open or away from the valve seat. o

When steam is first turned into the heating jacket 6, it is condensed by contact with the cold circulating water, and the waterof condensationl passes through the valve 17, which at this stage is raised to the limit alv lowed by the set screw 29, the casing 6 being in its lowermost position. lThe diaphragm 19 is at this time contracted to its smallest size and held away from the valve seat 2S by the spiral spring 21. In this position the water of condensation is free to drain through both the lower and.

upper outlets

14 and 22 respectively. AAs the steam increases in heat and pressure, there is a partial escape around the valve 17 and through passage 22, but as the diaphragm 19 expands, the passage through 22 is closed, and the pressure of steam against the area of the casing 6 above the valve 17 lifts the casing and closes the exit around valve 17. The casing remains in this raised position as long as there is steam in the trap, but when the temperature is lowered to the regulated point the diaphragm contracts and in so doing opens the top valve thereby relieving the pressure. The casing immediately falls following the drop in pressure, the weight of the casing and the weight of the water of condensation therein being both instrument-al in effecting this lowering. lVhen the casing drops the valve 17 is opened by the engagement of the stem 16 with the bottom of the reservoir. The water collected in the reservoir drains constantly from it through the opening 12 but in eX- tremely cold weather there is the possibility of this opening being closed by the water freezing at the outlet. If this take place the unfrozen water will flood the opening and escape through the ducts 14 which surround the opening. The effect of this will be that the opening will be thawed out by the heated water in the ducts sutliciently to remove the ice clogged therein, so that the water can flow again freely through the central opening. If perchance the water in the ducts freeze it will be thawed out by the heated water passing through the central opening 12.

In order to avoid any possibility of water remaining in the pipe 4, that is, between the radiators and the casing I have considered it advisable to pass a small air pipe 32 from the radiator farthest from the trap to the boss in which is formed the opening 3. This will prevent any vacuum in the pipe 4 which would tend to retain water in the pipe after lthe valves are open to drain. Assuming a car detached and the valves of the trap open there would be initially a flow of condensed steam, i. c., water, through the valve 17 which might possibly stop through a vacuum being formed in the pipe 4 near the radiators which would stop the flow and thereby allow the water to be frozen in the pipes. The pipe 32 however `avoids this possibility as it prevents any vacuum forming and consequently insures the complete draining of the water.

Vhat I claim as my invention is:

1. A steam trap comprising a cylindrical casing for the reception of steam and liquid, a pressure operated valve controlling the escape of liquid from the casing, a thermostat suspended within the casing, and a valve seat located above the thermostat and adapted to engage with the same when the thermostat is expanded, as and for the purpose specified.

2. A steam trap comprising a receptacle, a

cylindrical casing within the receptacle for the recept-ion of steam and liquid, such casing being movable, a pressure operated valve carried by the casing and having the stem thereof engageable with the bottom of the receptacle, such valve being open when the casing is in the lowest position within the receptacle, a thermostat located within the casing, and a valve seat upon which the thermostat seats, as and for the purpose specified.

3.11 steam trap comprising a closed receptacle, a hollow casing within the receptacle for the reception of steam and liquid, said casing being connected to the receptacle walls by pipes united with a ball and socket joint, a pressure valve operating in an opening formed in the bottom of the casing and adapted to be opened when the casing is in the lowest position within the receptacle, a thermostat supported within the casing, and

a hollow tube passing upwardly through the top of the casing, such tube being provided with a Valve seat at its lower end engageable with the upper face of the thermostat, as

and for the purpose specified.

4. A steam trap comprising a closed receptacle, a hollow casing within the receptacle for the reception kof steam and liquid, said casing being connected to the receptacle walls by pipes united with a ball and socket joint, a valve playing over a valve seat formed in the bottom of the casing, such valve having a stein extending downwardly and engaging with the bottom of the receptacle, and being open when the casing isv in the lowest position, a tube carried by the top of the casing and passing to the interior thereof, said tube having a valve seat formed at the lower end thereof, and a thermostat located within the casing and engageable when expanded with the valve seat, as and for the purpose specilied.

5. A steam trap comprising a receptacle, a hollow movable casing within the receptacle fitted with a top and bottom and secured to the casing walls through a suitable liexible joint, such casing being for the reception of steam and liquid, a removable valve seat located in the bottom of the casing, a vertically slidable valve operating in the valve seat and having a downwardly projecting stem engageable with the bottom of the receptacle, an adjustable tube carried by the top of the casing and passing to the interior thereof, a valve seat located at the lower end of the tube and having an opening therein continuous with the opening in the tube, and a thermostat within the casing adapted to engage when expanded with the latter valve seat, as` and for the purpose specified.

G. A steam trap comprising a receptacle, a hollow casing within the receptacle having a top` and bottom, the top bein removable and the bottom being provi ed centrally with a threaded opening, said casingk being adapted to receive steam and liquid.

and being connected iexibly through pipes with the casing, an annular memberthreaded into the opening in the bottom of the casing, such annular member carrying a t bridge provided with a socket, a valve seat threaded within the annular member and beneath the bridge, such valve seat carrying a spider, a valve playing over the valve seat and having the stem thereof passing slidably through the spider and engageable with the bottom of the receptacle, a thermostat wit-hin the casing and centered in the socket, a. hollow adjustable tube carried by the cover and passing to the interior of the casing, a removable valve seat carried at the upper end of the tube and having centrally an opening communicating with the opening in the tube, and-a spring interposed between the face of the thermostat and the top of the easing, as and for the purpose speciied.

7. `In asteam trap a receptacle having "a projecting portion passing from the bot-v tom thereof provided with a central opening passing' to the interior and ducts surrounding the opening, and passing also to the exterior, as and'for the purpose speciiied.

8. In a steam trap a receptacle carrying Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G."