US230282A

US230282A - Gtjstay l

Info

Publication number: US230282A
Authority: US
Publication date: 1880-07-20
Anticipated expiration: 1897-07-20

Description

(No Model.)

' G. L. JAEGER.

Lev Water Indicator. No. 230,282. Patented July 20,1880.

\Ymwhawa M W 7% N.FE\ER$, PHOKD-LITHOGRAPHER, WASHINGTON, O O.

NITED STATES PATENT Orricri.

GUSTAV L. JAEGER, OF NEW YORK, N. Y.

LOW-WATER IN olcp'ro R.

SPECIFICATION forming part of Letters Patent No. 230,282, dated July 20, 1880.

Application filed June 17, 1880. (No model.)

To all whom it may concern:

Be it known that I, GUSTAV L. J AEGER, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Low-Water Indicators for Steam-Boilers, of which the following is a specification.

The object of my invention is to furnish an indicator which shall reportlow water in steamboilers by the agency of an extension-tube at any desired distance from the boiler.

My invention consists in the combination, with an expansion-tube connected to the boiler at the alarm-line, of two detent-arms firmly connected to said tube, a releasing-bar adapted tofit between andbe retained bythe detent-arms when the expansion-tube is cold, and an alarm connected to said releasing-bar, so that when the water in the steam-boiler sinks beneath the alarm-line, andthe extension-tube becomes heated by the steam which enters into it, the releasing-bar, being no longer retained by the detent-arms,drops out and the alarmis sounded. A pressure-gage attached to the expansiontube serves to indicate its proper working condition, and with said expansion-tube is also combined a semaphoric signal.

In the accompanying drawings, which illustrate my invention, Figure 1 represents a side elevation of my indicator. Fig. 1* is a rear view of the same. Fig. 2 is a side view of a modification thereof. Fig. 3is adetached sectional view of one of the detent-arms when the same is arranged to form an alarm.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates a tube, which connects with the steam-boiler If) at the alarm-line-or, in other words, at the mean water-levelso that when the water in the boiler is above this level said tube is filled with water and its temperature is equal to that of the surrounding atmosphere; but if the water in the boiler sinks below said alarmline the tube A becomes filled with steam, whereby it is heated and caused to expand. Said expansion-pipe A may be carried to any distance from the steam-boiler-for instance, to the office of the factory in which the boiler is used-and in order to indicate that the expansion is clear and in working order,I attach to its outer or upper end a steam-gage, G. If

the expansion-tube should become stopped up the steam-gage would fail to indicate any pressure, and. the disorder would be made manifest.

On the expansion-tube A are firmly secured two detent-arms or collars, D D, at a suitable distance apart and parallel ,to each other, and these arms serve to retain the releasing-bar E. In order to effect this purpose the releasingbar is of such a length that when the expansion-tube is cold it (the releasing-bar) must be sprung in between the detent-arms, but when the expansion-tube becomes lengthened by the heating-action of the steam, said releasing-bar drops out from between the detent-arms.

In order to be able to insert the releasingbar it must be made of some elastic and flexible material, so that it can be readily bent and sprung in between the detent-arms, and said detent-arms may be made in the form of simple collars, as shown in Fig. 1., or in the form shown in Fig. 2, and they may be provided with notches a a, to receive the ends of the releasing-bar, as shown in Fig. 2.

If desired, one of the detent-arms may be made hollow, and brought in communication with the interior of the expansion-tube, as shown in Fig. 3; and in this case the notch (0* is made deep enough to open into the interior of the arm, and it forms the seat for the valveshaped head lfi of the releasing-bar E.

When the releasing-bar is in position the notch or opening (0* is closed; but when the expansion-tube is lengthened by the heat of the steam, and the releasing-bar drops' off, steam 'blows out of the opening a and produces an alarm.

In practice, however, I prefer to use for the alarm a common bell, F, as shown in Fig. l, or an alarm-clock, as shown in Fig. 2. The bell F is connected to a spring, 0, which is fastened to the upper detent-arm or collar, D. A strap, d, draws the bell inward toward the re leasing-bar when this latteris securedbetween the detent-arms or collars, Fig. 1. When the releasing-bar drops off the spring 0 is released and the bell sounds.

If an alarm-clock is used the releasing-bar connects by suitable mechanism with the detent of the alarm mechanism, and as soon as the releasing-bar drops out the alarm is sounded.

In orderto obtain an additional indication of the sinking of the water in the boiler, I make use of a semaphoric signal, I, which becomes displayed by the expansion of the tube A, and is brought out of sight when the tube contracts. This signal I can be connected with the expansion-tube A for operation there by by "arious mechanical contrivances, and in the example shown the signal is attached to an arm, a, mounted on a rock-shaft, f, to which motion is given by a rack, g, which is a fixture of the pressure-gage G, and meshes with a pinion mouuted on the shaft.

I am aware that alarm devices are well known, and that the principle of operating alarm devices by expansion or contraction is old and well known. 1 do not therefore claim such as my invention; but in all low-wateriudicators which are operated by the action of an expansiontube, and known to me, more or less complicated mechanism is required to produce the desired effect.

My releasing-bar can be applied to any pipe which has two couplings or collars at a suitable distance apart, and by applying to the expansion-tube a pressure-gage I am enabled to ascertain at any moment whether the apparatus is in correct working order.

Another important feature of my invention is the semaphoric signal.

Vb-at I claim as new, and desire to secure by Letters Patent, is-- 1. The combination, with an expansiontube connected to the boiler at the alarn'i-line, of two detent-arms or collars firmly connected to said tube, a releasing-bar constructed to be sprung in between said arms or collars when the expansion-tube is cold, and an alarm connected to said releasing-bar, all constructed to operate substantially as shown and described.

2. The, combinatiomwith an expansion-tube connected to the boiler at the alarm-line, of two detent-arms firmly connected to said tube, notches formed in said arms, a releasing-bar constructed to engage with the notches in the detent-arms, and an alarm connected to said releasing-bar, all constructed to operate substantially as set forth.

3. The combination, with an expansion-tube connected to the boiler at the alarm-line and with a pressure-gage fastened to said tube, of a releasing-bar connected to said tube andan alarm connected to the releasing-bar, all constructed to operate substantially as and for the purpose described.

4. The combination, in alow-Water indicator, of an expansiontube with a semaphoric signal, which is displayed by the expansion of the tube and brought out of sight when the tube contracts, all being constructed to operate substantial] y as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses.

GUSTAV L. JA'EGER. [L. s.]

Witnesses:

W. HAUFF, E. F. KASTENHUBER.