US740435A

US740435A - Steam-trap.

Info

Publication number: US740435A
Authority: US
Inventors: Henry H Humphrey
Original assignee: Wright Manufacturing Co
Current assignee: Dow Silicones Corp
Priority date: 1903-05-12
Filing date: 1903-05-12
Publication date: 1903-10-06
Anticipated expiration: 1920-10-06

Description

. PATBNTBD 00T. 6, 1903. H. H. HUMPHREY.

STEAM TRAP. APPLIO'ATIONHLED HAY 12, 190s.

f UNITED STATES PATENT Patented October 6, 1903;

FFICE.

HENRY H. HUMPHREY, OF. DETROIT, MICHIGAN, ASSIGNOR TO WRIGHT MANUFACTURING COMPANY OF DETROIT, MICHIGAN, CORPORA-- 'IION' OF MICHIGAN- STEAM-TRA P.

.BE'ECIFICATION forming part of Letters Patent No. 740,435, dated October 6, 1903. Application filed May 12, 1903. Scrial'lol 156,734. (No model.)

' provide a trap havin ga discharge-valve open# ing of substantially the same area as the in-4 let-pipe and alsoto provide a trap having a discharge-valve opening outward whose operation may be assisted by the pressure of,

the water in the trap. Iattain these objects by the construction illustrated in the accompanying drawing, which is a sectional view of the trap.

In construction the trap comprises two parts or sections Aand B, which form the casing. The part B has the opening C for the inlet-pipe, an opening D for the dischargepipe, and the opening E, into which is screwed the blow-od valve F. The depending wall or screen G extends across the lower pa'rt B- of the casing anddownward to near the bottom, thus causing the water of condensation to enter the main part of the casing at its lowest point, and thus insure a water seal sufficient to prevent the passage of steam.

The part A-is secured to the part B to'form a water-tight joint. It is provided with the dome H and the outlet-passage J. Secured in the section A, preferably by screw-threads, is the pipe K, into the lower end of which at a is pivoted the lever L. To the outer end of this lever at c isA pivoted the rod M, at the -upper end of which is the hollow iioat N,

preferably spherical vin form. Threaded in the upper end of pipe K is the valve-seat O. The valve P engages this seat, being supported by the rod R, which at its lower end is pivoted to the lever L at b. Intermediate the valveand pivotal point the rod R is guided in the guide S, attached to the'iuside ofthe pipe or made integral with the same.

justing screw, as shown.

The passage J connects with the outlet-open ing D in the part B. A

It will be noticed/that the distance fro-m the fnlcrum a of the lever L to the point c is mau-y times greater than from ot to l?. The

'result of this is that for low pressures of steam the weight of the lever L and of the float N will be sufficient to keep the valve closed. For example, a float four inches iu diameter two-thirds submerged will displace one pound of Water. The weight of this float acting on a lever of twelve to one will exert a downward pressure of fifteen pounds of steam against the valve when the valve-seat opening is one inch in diameter. For higher Apressures the weight of the iioatN is slightly increased, the increase Vin diameter not being necessary, the slight lack of buoyancy being compensated by the pressure of the wa. ter against the valve. Y

For very high pressures the following mechanism is provided: The plug T screws through the casing A at a poi-nt -jnst over the valve P. An adjusting-screw V passes' through this plug and has a flange at its lower end. The rod R is extended upward above the valve and guides the spring W, which rests on the valveand has its tension adjusted by the ad- It' advisable, the adj usting-screw may be made hollow and the upper end of rod R made small enough to pass u p into the same and be guided thereby.

The operation of the trap is as follows: To the opening C is connected the drip or waste pipe of thel steam system to be drained. The combined steam and water-pass down around the bottom of wall G until the trap is filled with water up to the bottom line of said Wall, when no more steam can enter. The water continues to enter until its height reaches the upper Water-line Y, when its pressure against the valve and the buoyancy of the iioat lift the valve from its seat and permit the discharge of the accumulated water. On account ofthe construction of the passage J and the position of the pipe K a Siphon-like action is obtained and the water is drained down to the lower water-line Xor until the water falls far enough to permit the weight of the oat ,to exert a closing force on the valve. The

blow-ol F is provided, so that all impurities may be easily removed.

Having now explained my construction, what I claim as my invention, and desire to secure by Letters Patent, is-A l. In a steam-trap, the combination of a casing, a valve-seat, a valve resting on said seat, and means operable by the water in the casing for raising said Valve off the seat, in combination with adjustable means for resisting the opening of said valve.

2. In a steam-trap, the combination of a casing, a valve-seat, a valve resting on said seat, and means operable by the water in the casing for holding said valve down on said seat, in combination with adjustable'means for resisting the opening of said valve.

3. In asteam-trap, the combination ofacasing, a valve-seat', a valve resting on said seat, and means operable by the water in the casing for holding valve down on seat and for raising it off said seat, in combination with adjustable means for resisting the opening of said valve.

4. In a steam-trap, the combination of a casing, a valve-seat, a valve resting on said seat, and means operable by the water in the casing for raising valve oft said seat and for holding said valve down on said seat, and auxiliary means for holding down said valve comprising a spring, and means whereby the tension of said spring is adjusted.

5. In asteam-trap, the combination of a casing having inlet and outlet openings, a valveseat having approximately the same area as said inletopening, a valve resting on said seat, and means operable by the water in the casing for raising said valve off its seat, in combination with adjustable means for resisting the opening of said valve.

6. In asteam-trap, the combination of acasing having inlet and outlet openings, a valveseat having approximately the same area as said outlet-opening, a valve resting on said seat and means operable by the water in the casing for raising said Valve o its seat, in combination with adjustable means for resisting the opening of said valve.

7. In a steam-trap, the combination of a casing having an inlet-opening, a tube screwed into a part of said casing, a valve-seatsorewed into the end of said tube and having an opening approximately the same area as the inletopening, a valve resting on said seat, a lever pivoted at one end in the other end of said tube, a iioat for raising the other end of said lever, and a rod connected to said valve and pivoted to said lever, the weight of the float and the position of the pivots in the lever being such that the valve will be held down against the seat until the ioat is raised by the accumulated water, in combination with adjustable means for resisting the opening of said valve.

8. 'In a steam-trap, the combination of the casing, a tube lsupported therein, a valve-seat secured at one end of the tube, a valve resting on said seat, a lever pivoted at one end in the end of the tube, a rod attached to said valve and pivoted to said lever near its pivoted end, a guide for said rod attached to the inside of said tube, a float attached to the 'free end of the lever, and auxiliary adjustable means for holding the valve on its seat. In testimony whereof I aix my signature in presence of two Witnesses.

HENRY H. HUMPHREY. Witnesses:

H. C. SMITH, JAS. P. BARRY.