US62150A - Improvement in low-water alarm for steam generators - Google Patents

Description

@witch grains gateat @fitta STEWART Bi PALMER, 0F SYRAGUSE, NEW YORK.

Letters Patent No. 62,150, dated February 19, 1867.

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TO ALL WHOM IT MAY CONCERN: i

Be it known that L S'rnwnnr B. PA'LnEiuof Syracuse, in the county of Onondaga, and State of New York, have invented a new and use ful Alarm for Indicating the Failure of a Proper Supply of Water in Steam Generators; and I do declare that the following is a full, clear, and cxact'description'of the same, reference being had to the annexed drawings, making part of this specification, in which- Figure 1 is a side elevation.

Figure 2 is a side elevation, showing the Whistle-valve released, and the arms contract-cd.

Figure 3 is an elevator, showing the whistle in action. i

Figure 4 is a plan of the yoke confining the upper pipe.

Figure 5 is a plan view of the whistle.

In the several figures the same letters are employed in the ldesignation of identical parts. v

My invention consists in a tube or series of tubes, in part of their length nearly horizontal, leading into the steam generator and terminating at the low-water line, so arranged that when the water` is above the end of the tube the tube shall be lled with water, which, escaping on the fall of the water below the low-water line,

, will admit the steam into thc tube, creating thereby an agitation which will produce a crackling noise sufficient to call attention to the state of water in the generator; second, in so arranging a tube or series of tubes opening at the lowwater line of a steaml generator that the expansion caused by the admission of the steam inte the tube, on the escape of the water therefrom, when the water in the generator falls bclonvitsunouth, `will actuatc a steam whistle or other alarm by certain devices hereinafter set forth; third, in thc particular arrangement of parts by which these results are attained.

The following description will enable a person skilled in the art to construct and apply my invention.

A is a pipe leading within the boilerand terminating at the low-water line. It is closed'by th`e stopgcock A. The elbow B on the end of said pipe receives the bent tube C, the arms of which-are nearlyhori-` zontal, but inclined slightly in the direction in which the water will llow in returning towards the boiler. The form of this tube is notessential.; it may be in one piece or in several pieces united by elbows. The upper end of the tube is connected with the elbow D, terminating in the pipe E, the upper end of which is in the airchambcr F. 'These several parts are attached by bolts to the plate G. The pipe E passes through a collar, H, the opening of which is large enough to-permit the pipe to play back and forth with the movement of the tube C. When the steam is raised in thc generator it will force the water inte the series of connected pipes, comd pressing the air in the chamber F according to the degree of pressure. This water remaining stationary will assume the temperature of the adjacent atmosphere, and so remain unless'the water in the generator falls below the lowwater line, when it will instantly begin to 'low out of the pipe and the steam to press in to'oecupy its place. This steam will pass over the surfaceof the water in the 'horizontal portions of pipe C, and by its condensation and the change in the temperature will produce a violent crackling noise, familia-rin the pipes in buildings heated with steam, and sufficient under ordinary circumstances to call attention to the state of water in the generator. In cases where a louder alarm is necessary pr advisable, I add to thc parts already described the following the pipe C is so bent that its tension inelines to bring together the elbows B and D, or a spiral spring, P, is placed between them, the -tensioniof which draws them towards one another. They are held apart by the iron or steel brace-rods M, which rest against the bearing m, at the other end against set-screws m in thc recesses in the elbows B and D. When the steam enters the pipe C, on the fall of water in the generator below the low-water line, the pipe becoming heated is expanded so that the brace-rods M will no longer rest against and reta-in in place the elbows B and D, which will be drawn together by the tension of the spring. The arm I projecting from the pipe E or elbow suspends the hinged click K, which, with the descent of the elbow D presses upon and opens the valve N of the steam whistle L, to which the steam from the boiler enters at O. The whistle would `continue lo sound as long.Y as the elbow D is drawn down, but it 2 allowing the valve stem to rise, and when the contraction of the pipe C may be disengaged, as shown in fig has raised the elbow D sufliciently, the click will fall inte its natural position, as shown in fig. l, by the weight of the projecting ball 7c.

An alarm bell or otheidevice may be substituted for the steam whistle, as the particular kind of alarm forms no part of my invention, which relates to the devices for actuating an alarm, not to the alarm itself.

What I claim as my invention,A and desire to secure' by Letters Patent, isl. vIn combination with a steam generator, the pipes A, C, and E, connected and arrangedo operate substantially as set forth. Y

' 2. In combination with the bent pipe C, and elbows B and D, I claim the rods M, substantially as and for the purpose set forth. i

3. The combination of the arm I, attached to.the elbow D or pipe E, click K, and valve stem N of the steam whistle L, substantially as and for the purpose set forth.

Intestiinony whereof l'have signed my name to this specication in the presence of twosubscribing witnesses.

STEWART B. PALMER. Y

Witnesses:

M. H. Wusrcom, J. HUNT.l

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