US 1573304 A
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Description (OCR text may contain errors)
Feb. 1e ,1926. 1,513,304
F. G. DARLNG VALVE Filed Feb. 16, 1924 Patented Feb. 163, i926.
UNETE STATES PATENT OFFICE.
PHILIP Gr. DARLING, F BRIDG-EORT, CONNECTICUT, ASSIGNOR TO MANNING, MAX- 'WELL @C MOORE, NC., OF NEWvYGB/K, N. Y., A CORPORATION OF NEWi JERSEY.
, Application tiled February 16, 1924.
To all whom t may conce/m:
Be it known that l, Pintar Gr. DrxiufrNo, a citizen ot the United States ot America, and resident of Bridgeport, in the county of Fairiield and State ot Connecticut, have invented new and usetul improvements in Valves, ot which the following is a speciw tcation.
This invention relates to steam safety Avalves otl the spring controlled type, and
more particularly to medium and low pressure valves such as are commonly used for tire tube boilers, etc.
rEhe principal object of the present invention is to provide a device tor protecting the valve spring from the action ot the escaping steam but without unduly increasing the cost of production oi" such valves, the protective devicebeing so designed that it may be applied to or omitted troni the valve `at the option ot' the maker or user.
In the accompanying drawings a preferred embodiment of the invention is il lustrated by way ot example, in which:
Fig. 1 is a vertical section through a valve A of the usual type having the protective device of the present invention applied thereto; Fig. 2 is a plan view ot the protective device removed trom the valve; and
Fig. 3 is a side elevation of such protective device.
The numeral 1 indicates a valve casing having an attaching base 27 an inlet chamy ber orpassage 3, and an outlet chamber or passage 4. An apertured partition 5 sepa- `rates the inlet and outlet chambers in the usual manner and `furnishes a support for the removable ring 6 whose upper edge is beveled to provide an annular valve seat.
A disk valve 7 co-operates with the valve seat to close the opening between the charnbers 3 and 4. In the example herein illustrated, the valve disk is preferably pro vided with a downwardly extending guide element 8 and has al socket 9 in its upper surface tor the reception of the lower end of the valve spindle 10. Wings or other usualtorms of guide may be substituted t'or the element 8 and any desired connec` tions between the spindle and disk may be used instead of those here shown. The valve spindle 10 is guided near its upper end in a bushing 11 ycarried by a spring housing 12 providing a chamber 13 for the reception of Ythe valve spring.
serial No. 693,261.
The spring housing 12 is arranged above and substantially coaxially with the valve seat ring (3, and in the usual or unimproved valve the chamber 13 of the housing communicates with the outlet chamber 4 by means of an opening 14 in the wall ot the casing, such opening being of substantially the same diameter as the spring housing. The casing is provided with an annular lip or flange 15 at the edge ot' the opening 14 which fits within a rabbet in a. iiange 16 at the lower end of the housing 12. The housing 12 is removably secured in position upon the casing 1l by means ot bolts 1T, and is preferably provided with one or more vent openings.
The valve controlling spring 18 is arranged within the chamber 13 surrounding the spindle 10. Its upper end bears aga-inst a fixed collar 19 while its lower end rests upon `a collar 20 supported by an enlarge ment 21 upon the spindle 10. The usual valve lifting levers 22, 23 may be provided for manually raising the valve from the seat tor testing, etc.
The construction described is one commonly employed in medium and low pressure safety valves supplied for use with firetube boilers, such valve containing relatively few parts and being capable ot production at low cost.
`With the construction thus tar described the valve spring 18 would be exposed to the escaping steam in the chamber 4. In accordance with the present invention a partition or septum 24 is arranged between the chambers 13 and 4 so as to prevent steam from entering the chamber 13. This partition preferably consists of a dished sheet metal plate provided with a peripheral flange 2:3 having a stiit substantially unyielding central portion which is downwardly concave and 'furnished with an opening 27 at its center. This opening is preferably of a diameter such that the spindle 10 may have a close sliding tit therein. The partition or septum 24 seats snugly in the opening 14 ot the casing with its fiange 25 overlying the upper surface ot' the rib 15 and when thus arranged the housing 12 may be secured in position in the usual manner, clamping the septum in place. As the opening 27 for the passage oi. the valve spindle is not substantially larger than the spindle, little it any steam enters the chamber 13 so that the spring is not exposed to the hot escaping steam, and damage to the spring is thus avoided.
The septum or partition member thus provided is applicable to existing valves without change in the latter and may be installed by the maker or user of the valve. lf at any time it be desired to dispense with this partition, it is only necessary to remove the housing 12, take out the partition and then replace the housing 12, when the valve is restored to its original condition.
l claim: Y V
1. ln combination with a safety valve having a casing provided Vwith an outlet chamber, a valve seat, a valve head, said head being subjected to pressure tending to liftit from its seat, a removable spring housing secured in concentric relation to an opening in the wall of the outlet cham# flange being adapted at will to be interposed and clamped between opposed sur- `faces of the spring housing and the casing, which surfaces, 'except for the interposition Yof the septum, would contact directly with each other, the central convex vpart of fthe septum when so positioned forming a fixed partition between the interior of the housing and outlet chamber.
2. In combination with a safety valve having a casing provided with inlet and outlet chambers, a valve seat and a valve head, the casing having a Hat annular seat surrounding an opening in the wall of the outlet chamber coaxial with the valve seat, a spring housing coaxial with the opening removably secured tothe casing, said housing having an annular bearing face of substantially the same width as said annular seat, a spring in the housing, and means transmitting pressure from the spring to the valve head, of a stilirl substantially rigid sheet meta-l plate having a flange constructed and arranged to be clamped between'the annular bea-ring surface of the spring housing and the annular seat or" the casing and having a dished central portion annular seat and bearing surfaces or' thecasing and spring housing respectively.
Signed by me at Bridgeport, Connecticut, this 31st day of January, 1924. Y
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