US1051970A - Air-valve for radiators. - Google Patents

Description

s. SMITH.

AIR VALVE FORRADiATORS.

APPLIOATION FILED APR. 10, 1911.

1,051,970. Patented Feb. 4, 1913.

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ffiaddcw 857772272 THADDEUS S. SMITH, OF INDIANAPOLIS, INDIANA.

AIR-VALVE FOR RADIATORS.

Specification of Letters Patent.

Patented Feb. 4,1913.

Application filed April 10, 1911. Serial No. 620,231.

To all whom it may concern Be it known that I, THADDEUS S. SMITH, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Air-Valve for Radiators, of which the following is a specification.

This invention relates to valves for use in connection with hot water and steam radiators, one of the objects of the invention being to provide a simple form of valve which can be readily attached to a radiator and which, while permitting air to escape freely, will prevent steam and water from leaving the radiator by way of the valve.

A further object is to provide a valve of this type which is free of adjusting screws and which cannot be tampered with or adjusted without removing certain of the parts.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings :Figure 1 is a side elevation of the structure constituting the present invention. Fig. 2 is a bottom plan view thereof. Fig. 3 is a central longitudinal section therethrough. Fig. 4 is a top plan view with the cap removed.

Referring to the figures by characters of reference 1 designates the body or casing of the device which is closed at the bottom, there being an aperture 2 formed within the center of a top plate 3 which serves to close the upper end of the casing and is located at a point removed from the upper extremity thereof. The aperture 2 has a vent tube 4 seated therein and extending downwardly into the casing, said tube being open at both ends and having its lower end tapered. A bell or float 5 is mounted loosely within the casing 1 and has a pad 6 of cork or other buoyant material upon its upper end and ar' ranged within the tubular casing 7. This casing extends around the lower end of the vent tube 4 and the pad 6 is normally spaced from the lower end of the tube 4. The internal diameter of the casing 7 is slightly greater than the external diameter of the tube 4 so that air is free to circulate between them under normal conditions.

An exteriorly screw threaded nipple 8 extends from the casing 1 at a point below the upper end of the bell 5 and has an orifice 9 therein opening into the casing l. A screw cap 11 det-achably engages the upper end of casing 1 and a compartment 12 is thus formed between the top plate 3 and the cap 11, the tube 4 opening into this receptacle. Apertures 10 are formed within the cap 11 and constitute outlets for air discharged into the compartment 12.

A pin 13 extends into the lower portion of the casing 1 and through a slot 14 formed longitudinally within the lower portion of the bell 5.

It will be apparent that when pressure is directed into the radiator cold air will first pass upwardly between the wall of the casing 1 and the bell 5 and will flow between the casing 7 and the vent 4 and thence into the compartment 12 from which it will escape into the external atmosphere by way of openings 10. As water finally enters the casing 1 it will gradually rise until it reaches the level indicated by the line X-Y Fig. 3. As the water thus rises the air trapped within the bell 5 will be gradually compressed and will finally elevate the bell so as to bring the pad 6 against the lower end of the vent 4, thus cutting off the further escape of air and consequently the escape of water from the casing. Should steam, instead of water, be directed into the casing 1, it will heat the air confined within the hell 5 and cause it to expand, the bell thus moving upwardly until the vent 4 is closed by the pad 6. Should any water be carried through the vent 4 by the escaping air, it will be deflected by the cap 11 and will remain within the compartment 12 which thus acts as a drip cup. As the bell 5 moves upwardly and downwardly within the casing 1 it is held against rotation by pin 13.

What is claimed is 1. A device of the class described including a casing having an inlet between the upper and lower ends thereof, there being a compartment within the upper end of the casing, an apertured cap constituting the closure of the compartment, a vent tube extending through the bottom of the compartment and projecting above and below said bottom, the lower end of the tube being tapered, a bell loosely mounted within the casing and having a longitudinal slot in the lower end thereof, means extending from the casing and into the slot for holding the bell against rotation relative to the vent tube and to the casing, a casing upstanding from the bell and extending around and slidable on the vent tube, and a pad within the bottom portion of the last named casing and constituting means for sealing the lower end of the vent tube when the bell is elevated.

2. A device of the class described including a casing having an inlet between the up per and lower ends thereof, there being a compartment within the upper end of the casing, a closure for said compartment, said closure having an aperture, a vent tube extending through the bottom of the compartment and above the below said bottom, a

bell fitted loosely within the casing and open at the bottom, there being a slot within the lower end portion of the bell, a pin extending from the casing and into the slot, said pin constituting means for support ing the bell out of contact with the bottom of the casing and for holding the bell against rotation, a casing upstanding from and movable with the bell, said casing extending around and being adapted to slide on the vent tube, and a pad seated within said casing and adapted, when the bell is raised, to engage and seal the lower end of the vent tube.

In testimony that I claim the foregoing as new, I have hereto aiiixed my signature in the presence of two witnesses.

THADDEUS S. SMITH.

/Vitnesses:

JOHN Bnownnn, FREEMAN B. BANsoM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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