US61412A

US61412A - Thomas f

Info

Publication number: US61412A
Authority: US
Publication date: 1867-01-22
Anticipated expiration: 1884-01-22

Description

@einen gisten stnt :@ffr.

THOMAS F; FIELD, OF SUGERTIES, NEIN/'.YORK.V`

Leners Para: ivo. 61,412, dated January 22, 1867.

nmovno nevica-ron CHANGING WATER 1N STEAM strenuous.

TO ALL WHOM IT MAY CONCER:

Be it known that I,- TH0MAS F. FIE'LD, of Saugerties, in the county of Ulster, andState of New York, have invented an Improved Device for Changing the Water in Steam Boilers while still under pressure of steam; and I do'hcreby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making 'part of this specification--k Figure 1 being a central vertical section of, the device, as attached to the headfof a steam boiler.

Figure 2, a view of the inner end thereof.

Figure 8, a side view ofthe same with its cap on, as when not in use.

Like letters designate corresponding parts in all of the tigures.

The device consists of a short pipe or nozzle, A, which is provided-with a lancb, a, by nhicbvit is secured to the head B of a steaznboiler, above the water-line thereof, by means-ot' bolts b b and nuts e a. The outer end is provided with a screw-thread, g, wherebythe end of a. hose is attached when water is to be let into the boiler, or on which a cap', C, (tig. is screwed to secure'all when the engi-ne is at work. Thus far, the invention, does not di`er fromthe ordinary construction. My invention consists in a valve, D, hinged to the inner end of the pipe A,vso as to close the same outwardly, and to open of itself, under pressure, inwardly. The hinge d of the valve is at the top, so that the valve can close by its own weight,'and the valve-seams preferably a little inclined, as shown, so that the valve will close down more rmly' by its own weight. The llolef, in the boiler head, is made large enough to allow the valve to play.

The use and advantages of this valve applied to the fixedn nozzle or pipe are these:. Ordinarily, when it is required to change the water in the boilers, (especially marine boilers,) toprevent incrustation bysalt or the deposit of sediment from foul Water, the fires must be put out, and the* engine lie idle till the water cools down and the pressure of steam ceases, which usually requires from one-halfto three-fourths of an hour delay; and

if the steam has'not wholly subsided, when the hose is attached it.blows into the hose and scalds the leather, and thus destroys it-a frequent accident; and sometimes the sudden pressure of the steam let in bursts the hose'. My invention obviates all 'of these objections; for when the hose is attached to the nozzle A, no steam can come out till the valve D opens, and this. valve cannotopen till the pressure oiwater in 'the hose (generally Y supplied under pressure from hydrants orvt'orce-pumps) overcomes .the pressure of the steam inside and flows into the boiler and condensesthe steam. VIf the pressure of' water in the hose is greater than that of the steam in the boiler, then the water can be changed immediately onvputting on theA hose;'but if it is not suicient, the tire has only to be slackened somewhat till the pressure of the water becomes sufcient. By the use of this valve, also, there is nodiiculty nor danger in attaching the hose to the noz'zle on Vac cunt of' the steam blowing out,

Another advantage sometimes incident to the boilers of ste'amboats is, that thevalve D (if the cap C is habitually left olf, it not beingA 'a necessary part ot' the device) will prevent the collapse of the boiler, in case of the sudden sinking oir the boat and condensation of the steam in the boiler. Such accidents are not uncommon with the old plan of feed nozzle, when gunboats -or other waryessels are `suddenly sunk by the enemys tire. But they could not happen with any invention applied to the boiler.

What I claim as my invention, and desire to secure byv Letters Patent, is- The valve D applied to and in combination with thea change-water feed nozzle -of steam boilers, and operating in connection with a feed pipe or hose under pressure, substantially as and for the pifposes herein set forth.' The above specication of my Vimproved device-for changing the water in steam boilers signed by me this 26th day of April, 1866. 4 I A THOS. FI FIELD.

Witnesses:

J. S. BROWN, JOHN H. FIELD.