US 1043451 A
Description (OCR text may contain errors)
D. MOSHBR. GLOSURE POR BOILER- GASINGS, dac.
APPLICATION FILED DBG. 16, 1911.
Patented Nov. 5, 1912.
invento-z 'permit the passage'o other instrument freely fpiai CHARLES D. MOSHER, 0F NEW YDRK, N. Y.
cLosUnE non noinnnfcnsmes, am.
fb all whom 'itmay concern.'
Be it known that I, CHARLES D. Mosman, a citizen of the United States, residing 1n the borough of Manhattan of the city of New York, county of New York, State of New York, have invented certain newand useful Improvements in Closures for Boiler- Casings, &c., of which the following 1s a specification, reference being hadto the accompanying drawings, which form a part hereof.
In the continued operation of Watertube boilers with inclined tubes it is necessary, from time to time, to remove the accumulations of soot on the tubes. This is generally accomplished byi the use of a steam-lance, that is, a pipe having perforations at its end,which is connected -with a steam-'hose and introduced among the water-tubes through hand holes in the casing of the boiler. The steam is generally used at high pressure and the result is that soot, dust and steam are blown back into the fire room through the hand hole around the steam-lance, it being necessary to make the hole considerably larger than the' steamlance in order that it may be moved in different directions. The removal and replacement of the hand hole covers also requires considerable time venience. Somewhat similar conditions eX- ist With regardl to the introductionlof pyrometers, draft-gages', or other instruments.
It is the object of this invention to provide a door or and closed readily and will permit` the free introduction of the steam-lance or other instrument and its necessary movement without permitting the escape of hotl gases,
steam, dustor soot, which in the case of a pyrom eter or 'draft-gage, might affect the4 accuracy of the reading. This object is attained by securing in each opening through the boiler casing a spherical bearing and mounting thereln a spherical closure which has throu h it an aperture to the steam-lance or but without undue looseness, while the sphere or spherical door can be turned, when the lance is removed, so as t close the aperture completely.
T e invention will be more fully exed hereinafter .with reference to the ac trated and in wh1ch Figure 1 is a view partly in elevation Specification of Letters Iatent. .Application led December 16, 1911.
V lance being `other structure and involves some inconi closure which can be opened and secured by mpanying drawing in which it is illus- Serial No. 666,220.
showing s o much of a water-tube boiler as is necessary to enable the application of the invention thereto to be understood. Fig. 2 is a View in section on the plane indicated by the line 2 2 of Fig. l, looking in the direction of the arrows. Fig. 3 is a detail View on a larger scale showing a portion of the boiler casing with the improved door or closure in position, a portion of a steamview of the parts shown in Fig. 3, the steam-lance being removed. Figs. 5 and '6 are detail views showing different positions of the door orV closure.
PatentedN ov. 5, 1912.
also shown. Fig. 4 is a front f It will be obvious that the improved door or closure is capable of application-to a water-tube boiler of any kind, or toany of similar kind, such as a superheater, feed water heater, etc.
In Figs. l and 2 there is illustrated a boiler comprising a water-drum a, a steamdrum b, and a series of water-tubes extendlng from one drum to the other, with an outer casing d. The latter is formed, at
-convenient intervals, with' hand holes e and e', which are disposed so as to permit a steam-lance, pyrometer, draft-gage or other instrument, to be introduced wherever required, as, in the case of a steam lance, from the end and from the side so that every part of the entire series of tubes can be reached with the steam jets from the nozzle of the lance. In each hand hole e and e is secured 'a spherical bearing f with open front andrear faces, which is conveniently formed in two parts, as shown in Fig. 3, rivets f to the casing d of the boiler. In the bearing f is mounted a spherical door g which has a diametrical aperture g of such l'size and shape as to permit the introduction therethrough of the steam-lance la, or other instrument but without such looseness as to permit the escape of clouds of steam and dust or any material leakage. The sphericalv door is also provided with a projecting pin g2 by which it can be turned either to expose the aperture g or to conceal the same within the bearing f.
lVhen it is desired to steam-lance, hose with a through one clean off the tubes, a connected by a flexible steam and another of the spherical doors between the rows of water-tubes and is moved about, as permitted by the movement of the spherical door in its bearing, so
steam supply, is introduced as. to cause the nozzle to sweep over the adjacent tubes. The pin g2 is so placed W1th respect to the aperture g as not to interfere With the free movement of the lance in the plane which includes the major axis of the aperture. When the operation has been carried on long enough through one hand hole, the lance is Withdrawn and inserted through the door of another hand hole, the lirst being closed by moving the spherical door, by means of the pin g2, so as to cause the aperture g to be covered by the spherical bearing.
I claim as my invention l. A closure for boiler casings etc., comprising a spherical bearing adapted to be secured in an opening' in the boiler casing, a spherical door mounted in said bearing and normally closing said opening and having an aperture for the introduction of an instrument therethrough, and a pin 4secured in the spherical door and projecting through the opening in the spherical bearing Whereby the door may be moved to cause the opening and aperture to register. 2. A closure for boiler casings, etc., comprising a bearing adapted to be secured per,- manently in an opening in the boiler casing, a spherical door movably secured in said bearing and normally closing said opening and having an aperture therethrough, and means for moving said door to cause the aperture and opening to register.
This specification .signed and witnessed this 15th day of December A. D., 1911.
CHARLES D. MOSHER.
Signed in the presence of- VV. B. GREELEY, WoR'rHING'roN CAMPBELL.