US467085A

US467085A - Electric insulator for boilers

Info

Publication number: US467085A
Authority: US
Publication date: 1892-01-12
Anticipated expiration: 1909-01-12

Description

(No Model.)

P. DECKER.

ELECTRIC INSULATOR FOR BOILERS. No. 467,085. Patented Jan. 12, 1892.

jjw, 45.2% m #6 A TTOHNEYS UNITED STATES PATENT GFFICE.

PETER DECKER, OF NORIVALK, CONNECTICUT.

ELECTRIC INSULATOR FOR BOILERS.

SPECIFICATION forming part of Letters Patent N 0. 467,085, dated January 12, 1892.

Apnlieation filed September 25, 1891. Serial No. 406.793. (No model.)

To all whom it may concern:

Be it known that I, PETER DECKER, of N orwalk, in the county of Fairtield and State of Connecticut, have invented a new and useful Electrical Insulator for Boilers, of which the iollowing is a full, clear, and exact descriplon.

The fiues of land and marine boilers are found to corrode rapidly in many instances where quick-speed engines are directly connected to the boiler by steam and feed-waterpipes. Experiment has demonstrated that the excessive oxidation of the interior of a boiler used to generate steam is frequently due to electrolytic action resulting from currents of electricity pervading the water in the boiler and which are generated by friction of working parts in a quick-speed engine, an electric circuit being established between the boiler and engine through the stea m-pipe and feed-water pipe connecting the same.

The object of my invention is to prevent the excessive oxidation of the interior parts of a steam-boiler due to electrolysis; and it consists in the introduction of an electrical insulator in one of the pipes extending between the engine and boiler, whereby the current of electricity is broken between them and the oxidation of the boiler interior from electrolysis is prevented.

My invention further consists in the combination of parts, as is hereinafter described and claimed.

While the insulation is effective to prevent injury to all types of boilers that are attached to quick-speed engines, so as to break an electrical circuit between them, it is herein shown and described in connection with a marine boiler of the vertical type and a vertical quick-speed steam-engine.

In the drawings forminga part of this specification similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side view, partly in section, of a vessel amidships broken away at each end, an upright boiler therein, a vertical steamengine, a pump, water-supply tank therefor, a steam-pipe, an d awater-su ppl y pipe exten (1- ing from the boiler and in connection with the engine, and the improvement placed in a joint in the water-pipe. Fig. 2 is an enlarged longitudinal section of the water-feed pipe sulating-joint shown in connection with the pipe, and Fig. 3 is a transverse section of parts taken on the line 3 in Fig. 1.

A represents an upright steam-boiler located in the hull of a vessel B.

O is an upright quick-speed steam-engine.

D is a hot-well to receive water from the tube condenser E, through which the exhauststeam of the engine traverses and is exposed to the water of flotage.

The boiler A is connected to the engine by a steam-supply pipe F, (shown broken,) the usual steam-controlling valve being removed therefrom, as well as the safety-valve for the boiler. These features may be of any approved form, and,as they are notnecessary to illustrate the invention, are omitted from the drawings.

The pump G has its plunger (0 connected with the main shaft D of the engine by an eccentric b, and the pump is fed with water from the tank or hot-well D bya connectingpipe 0.

The several parts briefly described are of well-known form in common use and are shown to facilitate an understanding of the invention, which consists in the introduction of an insulating-joint in thewater-feed pipe I, that extends between the boiler A and pump G.

As shown in Fig. 2, the pipe I is divided into two parts and at the opposing ends is provided with a radial flange 6 on each terminal, which flanges are perforated for the reception of securing-bolts g. There is a joint ring or washer h introduced between the flanges e, which is made of any good non-conductor of electricity that will also provide a water-tight joint for the pipe I.

Around each of the bolts g a sleeve 2' is placed and washers m between the flanges e and bolt-heads and nuts 42, which sleeves and washers are formed of material that is a nonconductor of electricity.

The insertion of the insulators as explained will prevent a current of electricity passing through the boiler from the engine and consequently arrest electrolytic action in the boiler that would result if such an insulator was not provided.

It will be evident that an equally beneficial 2. An electric insulator for a steam or water pipe extending between a steam-boiler and a steam-engine, consisting of an insulatingjoint located between opposing couplingflanges on the pipe-sections, a sleeve of nonconducting material on each bolt-body, and a Washer of non-conducting material under each head and nut on said bolts, substantially as described.

PETER DECKER.

\Vitnesses:

HENRY W. BODWELL, GEORGE E. BEARSE.