US209259A - Improvement in low-water indicators and alarms - Google Patents

Description

A. HAUN. Low-Water Indicator and Alarm.

No.209;25.' Patented Oct. 22,1878.

UNITED STATES PATENT OFFIoE.

ALFBEIIHAUN, OF PIGKWIOK, PENNSYLVANIA.

IMPROVEMENT IN LOW-WATER INDICATORS AND ALARMS.

Specification forming part of Letters Patent No. 209,259, dated October 22, 1878; application filed September 14, 1878.

To all whom "it may concern:

Be it known that I, ALFRED HAUN, of Pickwick, in the county of Clarion and State of Pennsylvania, have invented certain new and useful Improvements in Low-Water Indicators and Alarms; and I do hereby declare the following is a full, clear, and exact description anduse my invention, I will proceed to descrribe the exact manner in which it is carried on I In the drawing, A represents the expansiontube, having its lower end provided with an outer screw-thread, by which it is adapted to be connected with the gage-cock B of a steamboiler, said gage-cock serving as a stay or support to the expansion-tube, and thus rendering it secure in case it is desired to remove the boiler. To the upper end of said tubeA is seczlund the customary alarm-valve and whis- D represents a laterally-projecting valvestem, provided in its outer end with a slot, d, for receiving the lower end of the right-angled or bell-crank lever E. The upper end of said lever is pivoted or fulcrnmed at c to the upper end of the plate F, which projects a short distance above the valve-stem.

A vertical rod, G, is connected to the portion 6 of the lever E, said rod Gr extending downward through the outer end of a laterally-projecting arm, H, adjustably secured to the pipe A.

The lower end of the rod G is provided with a screw=threadand screw-nut, h, by means of which the lever E and valve-stem can be adjusted so that the valve will blow off at any desired point.

The adjustable rod Gr,'being connected to the lever E, exerts no action upon the valvestem consequently the parts of the apparatus are thus relieved of the excessive strain which must necessarily result where the said rod is connected directly with the valve-stem. The valve is kept against the seat when the Water in the boiler is at the proper height by means of the usual coiled spring surrounding the valve-stem.

By having the lever-power or the lever fulcrumed above the valve-stem less expansiontube is required in obtaining the desired result, and by means of which the indicator is adapted to be applied to boilers on all kinds of portable as well as stationary engines.

I represents a tube connecting the dome J of a boiler to the whistle, by means of which steam is conveyed from said dome to the whistle. L represents a plug securely screwed in the upper end of the expansion-tube, for the purpose of preventing the water from the boiler coming in contact with the whistlevalve, thereby obviating the greatest objections to low-water alarms that work by expansion, in which the water from the boiler, comin g in contact with the whistle-valve, causes it to corrode and leak or stick, rendering the whistle invariable as an alarm.

The operation of the indicator and alarm is essentially the same as other alarms of this class. The water in the boiler having sunk below the water-line in the boiler gives place to steam, the greater heat of which expands the tube longitudinally, which opens the valve and allows the steam passing through the pipe or tube leading from the dome of boiler to blow the whistle, and thus give the alarm.

I claim as my invention- 1. The combination, with the expansion-tube, provided with an alarm valve and whistle, of the laterally-projecting valve-stem and rightangled or bell-crank lever E, pivoted or fulcrumed above said valve-stem, substantially as and for the purpose herein shown and described.

2. The combination,with the expansion-tube, having an alarm valve andwhistle, of the valvestem 1), right-angled lever E, pivoted or fulcrumed above said valvestem, and adjustable rod G, substantially as and for the purpose herein shown and described.

3. The combination, with the expansion-tube, provided with the usual alarm valve and Whistle, of the plug L, secured in the upper end of said expansion-tube, substantially as and for the purpose specified.

4. In a low-water indicator and alarm, the combination of the expansion-tube, having an alarm valve and whistle, and adapted to be secured to the gage-cock of a steam-boiler, and

the connecting pipe or tube I, leading from the steam-dome of a boiler to the Whistle, substantially as and for the purpose herein shown and described.

ALFRED HAUN.

Witnesses J. H. MERRILL, J. F. DASHIELL.

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