US290101A - Habey woodbubn page and haevby cabley - Google Patents

Description

(No flodel.)

, H. W. PAGE & GARLEY.

ELEGITRIG ALARM FOR STEAM BO LERS, m.

. No. 290,101. Patented Decrll, 1-883.

WITNES I rfi'w y/ ATTORNEYS.

N. FETERS Ha'oLMognpbeq Waihingion. o. (L

UNITED STATES PATENT "OFFICE HARRYVWOODBURN PAGE AND HARVEY oARLEY, OF Lone BRANCH, NEW JERSEY; sAID oARLEY ASSIGNOR OF ONE-HALF HIS RIGHT ro THOMAS MOKENNA, OF s ME PLACE.

ELECTRIC ALARM FOR STEAM -B OILERS, 80C.

. I SPECIFICATION forming part of Letters Patent No. 290,101, dated December 11, 1883.

Application filed March 24, 1883. (No model.)

To aZZ whom it may concern: with reference to the degree-marks 'on the Be it known that we, HARRY W. PAGE and plate G. 5 HARVEY OARLEY, both of Long Branch, in H J represent, respectively, the connected the county of Monmouth and State of New electric alarm and battery, which are connect-' Jersey, have invented a new and Improved ed, respectively, to the bent rods E and the Electric Alarm for Steam-Boilers, 850., of mercury-tube d by the wires h and j.

t which the following is a full, clear, and exact The action of the device is as follows: 'When description. A the water in the boiler stands above the low- The object of our invention is to provide an water line, the water entering the chamber 1) IO electricalarm apparatus more especially inthrough the stem D will prevent the entrance tended for use as a low-water indicator for of steam to the said chamber, and the mercury steam-boilers, in which apparatus mercury is in the bulb a will have the same temperature 6c used for completing the electric circuit when as the water, causing it to stand in the tube d the alarm should be given. The apparatus is somewhat below the lower end of the arm 6,-

1 also applicable to ovens, furnaces, and other but when the water in the boiler falls below contrivances where the heat within hasneed the low-water line. the steam in the boiler to be regulated. l/Vhen applied to steam-b'oilwill enter the chamber 1), and, being of amuch ers, the action of theapparatus depends upon higher temperature than the water, will cause the fact that the steam in the boiler is always the mercury to rise in the tube d in contact 2Q of a higher temperature than the water. a with the lower end of the arm e, (the rod E Reference is to be had to the accompanying having been previously properly adjusted,) drawing, forming part of this specification, in and thus complete the electric circuit and 0 which the figure is a sectional elevation of our cause the alarm to be given. invention as it appears when applied to a In the spindle D is fitted the screw-plug k,

25 steam-boiler. c for cutting off communication between the Arepresents athermometerlik'e device, the chamber 72 andv boiler O, in case it should be mercury-bulb a of which is inclosed in the. desired to unscrew the bulb B from the tube 7 sectional globe B, which forms the chamber b D, or to. unscrew the upper section, b, from around the mercury-bulb, as shown. This the lower section, If, of the bulb for repairs;

3o chamber b communicates with the interior of and to adapt the spindle D to serve also as a the boiler Othrough the valve-stem D, to which test-cock,- we provide it with the faucet-sleeve Z the globe B is attached, and which stem is and plug Z, as shown clearly in the drawing. screwed into a suitable screw-tap made in the The mercury-tube cZ-is enlarged upon the inboiler at the low-water line. side at a point above the lower end of the arm 3 5 In the-plate F, which closes the upper end e, asshown at d, to prevent all danger of i of the tube (Z of the thermometer-like device overflow of the mercury in case of excessive A, is fitted the thumb-nut f, through which heat. passes the insulated arm e-of the bent rod E; Constructed in this manner, the alarm deand the insulating material a on said arm 6 is vice is reliable and cheap, and by adjusting 4o screw threaded to match the screw-threads of the rod 1] it may be applied to avariety of the nut f, so that by turning the said nut f uses. the bent rod E may be raised or lowered to Having thus described our invention, what 0 suit the temperature at which it is desired to we claim as new, and desire to secure by Letters have the alarm given. The arm 6' of the bent Patent, is

4 5 rod E is of the same length as the arm 6, and 1. The combination, with the boiler 0, proreaches down in front of the graduated plate wided with the tube D, of the globe B, inclosvilli G, attached to the thermometer-tube d, and ing the water and steam chamber 12, mercury- 5 thus serves as an indicator for setting the rod E bulb a, provided with mercury-tube cl, ad-

3. In an electric alarm, the colnbination, with the globe B, of the mercury-tube a, suspended within said globe, the tube d, )r0vid ed with the thumb-nut f, and the insulated threaded wire 0 a, substantially as herein shown and described.

HARRY \VOODBURN PAGE. HARVEY OAKLEY.

\Vitnesses:

SYDNEY T. SLocUM, \VILLLuI W. WEsT.

Images