US99996A - Robert berryman - Google Patents

Description

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EoBEnr BENEYMAN, or PHILADELPHIA, PENNSYLVANIA.

Lette/rs .Patent No. 99,996, dated February 15, 1870;V antedated August 16, 1869.

LOW-WATER INDICATOR The Schedule referred to in these Lette-rsl Patent and making -part of the same.

To all whom it may concern:

Be it known that I, ROBERT BERRYMAN, of Philadelphia, Pennsylvania, have invented an Improvement in Low-WaterAlarms for Steam-Boilers,.of which the following is the specification.

Nature and Object of the Intention.

With a vessel Ocommunicate two pipes B and P, the former, and larger pipe extending from the upper part ofthe vessel, and che latter from the bottom ofthe same, and both pipes are connected by suitable couplings, N1 N2, to a horizontal pipel, which is equal .in diameter to or is larger than thepipe B, the pipe P extending into the coupling N1, to a point below the end of the pipe B, for a purpose described hereafter.

The pipe P3 extends through the head X of a steamboiler, the center ot' the pipe being on a line with the low-water line x, and to the coupling N is connected an ordinary blow-otcoclr S.

In the center ofthe top of the vessel Gis an open- K ing, to which is iitted a valve E, ou a stem or rod p,

which extends through an opening in the stem of a steam-whistle W, secured tothe top of the vessel, the rod ybeing connected at its upper end to a weighted lever s', which tends to retain the valve in contact with its seat. l

The valve-stem p also passes through and is conneeted to av cylindrical vessel H, the top of which` is curved and perforated, the perforations being surrounded by flanges orl tubes t t', for a purpose described hereafter.

The vessel H and the weight on the lever s are so proportioned that the vessel will hold such a quantity ot' water as will connterbalance the weight, and withydraw the valve E- from its seat.

To the top of the vessel C is hinged a perforated case A, which, when-in .the position v.shown in the drawing,'incloses the whistle W, and prevents the weighted leverfrom being tampered with, and the whistle from being injure A pipe, P, communicates with the boiler, and with the upper eiid of an ordinary glass indicator Q, the lat ter commuuicatingthrough a pipevP5 with the pipe P.

Operation.

So long as the water within.i the boiler is above the A low-water line z, the chamber 'C will retain the water which has been forced into it from the boiler, through the pipes Ps P and B, and the valve E will'remaiu in contact with its seat.

When, however, the water'in the boiler descends to the pipe P, the steam will enter the latter, and passing through the pipe B, will force the contents of the vessel O through the pipes P and I back' into the boiler, the vessel H, owing to the weight ot the water retained within'the same, descendingv and 1emoving the valve E from its seat, so that the steam passes to the whistle W, and sounds au alarm.

Inasmuch as the pipe P extends into the tube P3, and below the end ot' the tube B, the descent of' the water below the top of the tube will uncover the en'cl ot' the tube B, and permit the steam to pass into the latter, while the end of the tube P is yet covered, the' simultaneous passage of steam into lboth tubes, P and B, which would interfere with the discharge of the contents of the vessel. (l, being thus prevented.

1t will be apparentthat the tubes B and P may communicate in like manner with a casing or chau1- ber, instead of with a tube P, as described.

lnasmuch as the. tube B is larger in diameter than the. tube P the volume of steam admitted to the vessel will be snt'eient both to sound the whistle and overcome the pressure ofthe water, which will be forced rapidly back into the boiler, so that the apparatus will act witlrgreater promptitude than if steam and water'- pipes of the same diameter were used.

Another advantage resulting from the use of an en.- larged steam-pipe is, that when the latter enters the boiler above the high-water line, the apparatus may be tested at any time without blowing the Waterin the boiler to the low-water line; as when the cock 'S is opened, the steam will instantly force allvthe water from the chamber C, a result which would not ensue if ltwo pipes of the same diameter were used.

Inasinneh as the pipe P6, which supplies stearato the whistle F, is larger in diameter than the pipe'P, which conducts to the boiler any water which may be carried up by the pipe 135 or ,condensed in the pipes or couplings, such a volume f steam is admitted t0 the whistle as'will both sound the alarm and keep down the water in the pipe P9, thedischarge of water through the lwhistle being thus prevented. Y

` saine through tubes or `channels Asuitably arranged;

for instance, it may be placed above the boiler, and the tube B may communicate with a vertical tube P7, extending through the shell and to tbe'loW-water line, and the tube I may communicate with a small tube P, extending through the tube 1?",4 and below 4the end ot' the latter, the necessity of pert'orating the boiler shell at two points being thus avoided.

It has heretoforebeen customary, when water-vesL sels H were used for operating the whistle-valve, to employ cup-shaped vessels, without any covers or tops, but I have found that such vessels are, liable to become filled with dirtand sediment, and to continually increase in weight,- objeetions which I etfectually obviate by placing an inclined or curved top on the vessel, and pertorating this top so that the water will enter i'reely, while' any particlesot' matter will tend to slide down the inclined top and pass to the bottom of the vessel C.

To. render the entrance of particles still moredilcult, the peri'orations may be inclosed by tlanges or tubes tt', as shown in the drawing.

` Claims, 1; A vesselv or chamber (l, in. combination with devices for indicating the presence of water in and its absence from the vessel, and with pipes or openings for the. passageot' steam and water from the boiler, when the steam-passage or channel is larger than the other passage, tor the purpose described.

2. A steam-whistle, gong, or other steamalarm, in combination with pipesyor openings l'or the passage of steam and water from a boiler, when the steam- `passatge or opening is larger than the water-passage,

for the purpose speeilied. l

'3. The combination of a' vessel, a pipe ext-ending freni the upper part thereof to the low-water line, and a second pipe extendingr from the lowerpart of the vessel through the larger pipe, and to a point below the end ot' the latter, for the purpose set t'orth.

4. A vessel con'iinunicating with a tube P, or its equivalent, 4through pipes B P, when the pipe P pro jects below the end of the pipe B, and when the pipe P connnunicates'with and is arranged in respect to a boiler, substantially as set forth.

5. A vcsselH, operating in a casing O, substantially as described, and perforated at the top, for the purpose set forth.

6. 'lbe tnbes't t', in combination with the perforations in the vessel H, as speeited.

7. The combination ot' a vessel C, communicating with the boiler through pipes of dilferent diameters, and a blowfot'coelt S, substantially as and furthe puri pose described.

In testimony'whereo I have hereunto signed my name in tbe presence ot' twofsnbscribing witnesses.

ROBT. BEBRYMAN.,

Witnesses:

CHARLES H. EyANs, lsaAe R. OAKFORD.

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