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Publication numberUS41480 A
Publication typeGrant
Publication dateFeb 9, 1864
Publication numberUS 41480 A, US 41480A, US-A-41480, US41480 A, US41480A
InventorsChaelbs H. Caeey
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in water-indicators for steam-boilers
US 41480 A
Abstract  available in
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Description  (OCR text may contain errors)



Specification forming part ot' Letters Patent No. 41,480, dated February 9, 1864.

To all whom it may concer-1t:

Be it known that I, CHARLES H. CAREY, of Detroit, in the county of Wayne and State of Michigan, have invented a new and useful machine', entitled Low and High Water Alarm and Water Indicator, for giving alarm when the Water in a steam-boiler is getting too 10W or too high, and indicating the intermediate heights of water (between low and high Water) in the same boiler; and Ido hereby declare that the following is a full,clear, and exact description ot' the construction and operation ot' the same, reference being had to t'ie annexed drawings, making` a part of this specification, in which- Figure 1 is a front elevation Fig. 2, a ver tical section; Fig. 3, a side elevation, and Fig. 4 a horizontal section.

The sulject of my invention is an apparatus consisting of a double lever, float, rack, and pinion, index, and whistle, constructed and operating as hereinafter explained, to indicate the height of Water in a steam-boiler: nl sound an alarm in the event of it reaching a dangerously `lou7 or high level.

To enable others skilled in the art to make and use my invention, I will proceed to dc scribe its construction and operation.

I construct my float A (see the accompanying drawings) in the usual manner, and attach the same to a rack, B, whichV may be either solid or perforated in its length like a tube,

i'or the purpose of admitting steam into said oat to prevent its collapse. The upand-down motion of said iioat and rack is communicated to the hand C, through thepinion D. Thus the i position of the water E in the boiler F may be read on the dial-plate G at any time said boiler is in operation. Said float, being guided in its fluctuations by said rack fitting loosely and sliding in a guide, H, (such as represented, or its equivalent,) will impart its downward motion to the extremity I of double lever J, thereby opening the valve K, connected With said double lever by a loose joint, by which operation the whistlewill sound the alarm Whenever said tloat is brought in contact with said extremity of lever by the water in said boiler getting too low. Should the Water and said oat rise in the boiler it might do so until said tloat should strike the end M of said double .lever, opening said valve and sounding the alarm at high Water, thereby calling the attention of the attendant in case of neglect or absence. The weight N will cause said valve to close again the moment the obstacle is re moved.

The range of variation in the amount of water in the'boiler to be tolerated Without notice from the alarm is regulated by the vertical distance between the extremities of said double lever.

What I claim as my invention, and desire to secure by Letters Patent, is-

The combination ofthe double lever J I M,

iloat A, rack B, pinion D, index C, and Whistle K L, constructed, arranged, and operating substantially in the manner and for the purposes set forth.

CHARLES H. CAREY. Witnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7082827 *Jun 19, 2003Aug 1, 2006Samuelson Scott RLeak detector
Cooperative ClassificationG01F23/30