US1382645A - Consin - Google Patents

Description

F. L. HU TCH|NSO'N.

STEAM TRAP.

APPLICATION FILED JUNE 5, I919.

1,382,645, v Patented June 28,1921

. i 4 v ElwueMk? HWMMQ clrm s UNITED STATES PATENT OFFICE.

FRANK L. HUTCHINSON, OF MILWAUKEE, WISCONSIN, ASSIGNOIR. T0 STERLING ENGINEERING (10., 0F MILWAUKEE, WISCONSIN, A CORPORATION OF WIS- CON SIN.

STEAM-TRAP.

Specification of Letters Patent.

Patented June 28, 1921.

To all whom it may concern:

Be it known that I, FRANK L. HUTGHIN- soN, a citizen of the United States, residing at Milwaukee, county of Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Steam-Traps, of which the following is a specification.

My invention relates to steam traps.

The object of my invention is to provide such a trap with an improved cap piece from which the expansible thermostatic valve controlling chamber may be adjustably supported and the means of adjustment concealed in such a manner that it will not be tampered with by uninformed persons; also to utilize the means of concealment in part to prevent leakage past the adjusting screw,

. and in part as a means for attaching the name plate of the manufacturer and dealer, whereby the expense of attaching such name plates is reduced to a minimum and the rimary purpose of the plate as a means or concealing the adjusting device is obsoured.

In the drawings Figure 1 is a plan view of an outlet valve mechanism having a cap piece embodying my invention.

Fig. 2 is a vertical sectional view drawn to a plane which includes the axes of the inlet and outlet ports.

Like parts are identified by the same reference characters throughout both views.

The casing 1 is provided with an inlet port 2 and an outlet port 3. 4 is a coupling member rotatively connected with the casing at the inlet port to facilitate connecting an inlet pipe or duct leading from a radiator or radiator system. 5 is a clamping nut for engaging the swivel flange 6 of the coupling member 4.

The casing cap 8 is provided with an interior tubular projection or boss 9, within which a hanger screw 10 has threaded engagement. The hanger screw 10 is attached to the upper wall of a thermostatic expansion chamber 11, the bottom wall of which is provided with a valve 12 normally suspended at a slight distance above the valve 13, whereby, when the thermostatic chamber 11 expands, the valve will move downwardly to its seat and will close the inlet port 2 against the pressure of the fluid.

All of the above described parts may be of ordinary construction, and as the mode of operation of the valve controlling thermostatlc chamber is well known in the art, further description is deemed unnecessary.

But it will be observed that the cap 8 is provided with a raised head 15. Where the cap is to be screwed into the top of the casing as indicated at 16, this raised head 15 has one portion thereof squared or made in the form of a hexagon as indicated at 17 whereby a wrench may be applied to unscrew the cap. The aperture in the boss 9 which receives the adjusting screw 10 is extended upwardly through the top wall 19 of the head to an enlarged circular recess 20, the side walls of which are threaded at 21. And at the base of this threaded portionan annular seating 22 is provided to receive a packing disk 23 composed of rubber or other suitable material. This packing disk is compressed upon the annular seating 22 by a circular metallic plate 25, preferably formed of brass and adapted to be utilized as a name plate. This plate is secured in position by an annular clamping ring 27 screwed down upon the margins of the disk 25 and leaving the central portion of the disk exposed in the recess 20 whereby the reading matter and symbols upon the name plate may be exposed to view.

I preferably employ a locking screw 28 for locking the hanger screw 10 in the desired position of adjustment. After the screw 10 has been turned to a position in which it will hold the thermostatic chamber 11 and the valve 12 in. the proper position of adjustment, the locking screw 28 will be inserted through the recess 20 and screwed down from the top until it bears upon the screw 10 and causes the threads of the latter to bind against the threads of the socket. The rubber gasket or other packing disk 23 is then inserted into the recess 20 and clamped upon the seating 22 by the metallic disk 25 and the threaded annular clamping nut 27.

It will be understood that the cap 8 may be secured to the casing 1 with any desired degree of permanency calculated to prevent its removal by unauthorized person for any readjustment of the thermostat may be made by the engineer after removing the ring 27 This ring preferably has a smooth exposed surface so that it can only be re moved by the engineer or some person having some special tool for the purpose, such 110 i for example, as an expander clutch. If readjustment of the thermostatic chamber is required, the engineer removes this ring 27, together with the disk and rubber gasket 23, after which he unscrews the locking nut or screw 28, and then inserts a screw driver or equivalent tool, to turn the hanger screw 10 toiraise or lower it as may be required, replacing the parts after the desired adjustment has been made.

It will, therefore, be apparent that the screw threaded joint at 16 may be cemented to prevent any possible leakage, and to also prevent the removal of the cap 8 except b the application of extraordinary force. t is also apparent that quick access may be had to the upper end of the hanger screw 10 by any authorized person familiar with the structure and provided with suitable operating tools. It is further apparent that no extraordinary precaution is necessary to prevent leakage along the screw 10 for the reason that the rubber disk 23 will eifectrv ally prevent the liquid from escaping through the recess 20. I claim 1. The combination with a thermostatic outlet valve casing provided with fluid supply and outlet ports, of an apertured cap piece having a recess in its upper surface in communication with the aperture, a removable member seated in said recess and adapt ed to form a fluid tight closure covering and concealing said aperture, and means for clamping said member in position.

2. The combination with a thermostatic outlet valve casing provided with fluid inlet and outlet ports and having a cap provided with a centrally disposed aperture adapted to receive an adjusting screw, the walls of said aperture having a shouldered seating, a member mounted on said seating and adapted to close said aperture, and a ring nut threaded in the cap in the outer end of the igp'erture in clamping relation to said mem 3. The combination with a thermostatic outlet valve casing provided with fluid inlet and outlet ports and having a cap .provided with a centrally disposed aperture adapted to receive an adjusting screw, the walls of said aperture having a shouldered seating, a member mounted on said seating and adapted to close said aperture, and a ring nut threaded in the cap in the outer end of the aperture in clamping relation to said member, and a metal plate interposed between the clamping member and said member and exposed to view through the central portion of the nut.

4; The combination with a thermostatic outlet valve casing provided with a caphaving a raised central portion, said cap having a circular recess therein from the central portion of which a tubular aperture leads downwardly through the cap from the base of the recess, an adjusting screw having threaded engagement with the wall of said aperture and adapted to support a thermostatic member within the casing, a packing disk seated in said recess in a position to cover said aperture and adjusting screw, a metallic disk covering the packing disk and a ring nut having threaded engagement with the wall of the recess and adapted to clamp the metallic disk and packing disk in fluid tight relation to the cap, said valve casing having fluid inlet and outlet ports below the cap.

5. The combination with a thermostatic outlet valve casing provided with a removable cap having a raised central portion, said cap having a circular recess therein from the central portion of which a tubular aperture leads downwardly through the cap from the base of the recess, an adjusting screw having threaded "engagement with the wall of said aperture and adapted to support a thermostatic member within'tli'e casing, a packing disk seated in said -'re'cessin a position to cover said aperture and adjusting screw, a metallic disk covering the packing disk and a ring nut having threaded engagement with the wall of the recess and adapted to clamp the metallic disk and packing disk in fluid tight relation to the cap, said valve casing having fluid inlet and outlet ports below the cap.

Intestimo'ny whereof I aflix my signature in the presence of two witnesses.

FRANK L. HUTCH'I'NSON.

lVitnesse's A. N. GoFF, M. ANDEL.

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