US721482A - Steam-boiler. - Google Patents

Description

UNTTED y STATES PATENT @Erica EDWARD VARD, OF MAYVILLE, WVISCONSIN.

STEAM-Botnia SPECIFICATION forming part of Letters :Patent No. 721,482, dated February 24, 1903. Applioationifled May 23, 1902. Serial No. 108,663. (No model.)

vTo all whom t may concern,.-

Beit known that I, EDWARD WARD, a citizen of the United States, anda resident of Mayville, in the county of Dodge and State of Wisconsin, have invented certain new and useful Improvements in Steam -Boilers, of which the following is a full, clear, and exact description.

My invention relates to improvements in steam-boilers; and it is more particularly directed to that part at' the rear known as the arch, which forms part ofthe return or combustion chamber.

The object of the present invention is the provision of a simple and durable construction which may be easily removed and replaced, as occasion may require, without'disturbing the brick of the boiler-setting at the side or rear walls, whereby the rear end of the boiler can be exposed to enable access to be obtained to theboiler or the iiues thereofl for the purpose of repairing and cleaning the parts.

The improvements also overcome all diiculty of expansion of the parts crowding or displacing the brickwork, and the parts of the improved device are joined together ina novel way and so as to dispense with bolts or other equivalent fasteners.

With these ends in view the invention consists of a steam-boiler embodying the novel features of construction and arrangement, which will be hereinafter fully described and claimed. l

Reference is to be had t0 the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the figures.

Figure 1 is a sectional elevation onthe line 1 l in Fig. 2 through the rear part of a steamboiler having my improvement applied thereto, and Fig. 2 is atransverse sectional elevation taken in the plane of the dotted line 2 2 in Fig. l.

A designates the rear portion of an ordinary return-tlue steam-boiler, which is disposed in the usual way within a boiler-setting, the side Walls of which areindicated at b and the rear wall at b. The space between the upper rear part of the boiler A and the rear wall b of the boiler-setting is closed by one or a series of arches, (indicated at C C',) the number of arches depending upon the diameter of theboiler. It will be understood that the invention may employ a single arch when a boiler of small diameter is used; but the number of arches may be increased to two, three, or more, as may be required, although I have only shown two of the arches C C in Fig. 2.' Each arch consists of a metallic backingc and a facing c', which is made of fire-brick or other heat-resisting material. In the manufacture of` each arch I prefer to arrange the Vfire-brick facing'c' in a proper curved position and to cast 'the backing c against the rear surface of said fire-brick facing, whereby the metallic backing and said brick facing are united intimately and solidly together without the employment of bolts or other suitable fastenings. It is my practice, however, to provide the convex rear surface of the brick facing with recesses or grooves into which flows the molten metal of the metallic backing during the operation of casting said backing, thus uniting the facing and the backing by the keys, (indicated at din Fig. l.) The recesses or grooves in the brick facing may be of dovetailed shape in cross-section in order that the keys may take a similar shape, and this construction not only binds the fire-brick and the metal backing substantially together, but it enables me to produce a superior arch at a low cost of manufacture. The metallic backing of the brick-lined arch is provided with a loop or eye e, which is adapted to receive the hook e on the lower extremity of a threaded suspension-bolt E, the latter passing in an upward direction above the boilersetting and betweenl suitable cross-rails f, which are adapted to restupon the boilersetting at the rear part thereof. The space between the rails is spanned by one or more 'bridges F, and on each bridge is adapted to rest a nut e2, which is screwed on the threaded shank of the suspension-bolt, whereby the Vbolt is ad justably connected to a supporting device located on the top part of the boiler setting.

By employing the arch or arches contemplated by this invention the rear wall b of the boiler-setting need not extend tothe top edges of the side walls b, and in Fig. l I have shown' this rear wall as terminating a suitable distance below the top edges of theside walls,

thereby opening the rear end of the boiler setting. I prefer to employ a seat on the rear wall b for the reception of the lower edge of t-he arch or arches, and this seat is provided by cutting away or reducing the width of the top part of said wall b', thus forming a ledge b2, which constitutes the seat just referred to.

Inbapplying my improvements to a boiler it is only necessary to erect the rear wall b to a height sufcient to extend above the return-lues of the boiler A, and the arch 0r arches C C are then placed in position, so as to span the space between the upper rear end of the boiler and this rear wall b', whereby the arches and the setting cooperate to produce the return or combustion chamber D. The upper front end of each arch rests against the solid or unbroken part of the rear fluesheet, said front end engaging with the boiler on a line above the return-tubes thereof. The lower rear end of the arch or arches is seated iirmly upon the ledge or shoulder of the rear wall, and said arches are engaged by the suspension-bolts E, the latter relieving the boiler and the setting of some of the weight of the arches.

It is evident that the suspension-bolts may be manipulated in order to raise the arches and permit their removal from the furnace, thus opening the rear portion of said setting and allowing workmen to obtain easy access to the rear part of the boiler, whereby the ues or tubes can be easily cleaned, or any one of the tubes can be taken out of the boiler should occasion demand. The employment of the arches overcomes expansion of the rear part of the boiler, which in ordinary structures is sometimes suiicient to displace or crowd out the bricks from the rear wall b. My improvements enable the rear part of the boiler to be opened with facility and despatch for the performance of necessary work or for inspection of the parts. These improvements may easily be removed and applied, and they may be manufactured at a low cost. The employment of the firebrick as a facing for the metallic back preserves the latter from the deteriorating action of the heat and products of combustion, and the arches are Very durable and efficient in service.

Having thus described my invention, I claim as new and desire to secure by Letters Patent" l. The combination with a boiler, and a rear wall, of an arch spanning the space between the boiler and said wall and provided on its upper convex face with a loop o1' eye, a bridge on the boiler-setting, a suspensionbolt hooked into said loop or eye of the arch, and a nut screwed on the bolt and supported by the bridge to adjustably suspend said arch.

2. The combination with a steam-boiler, and a rear wall, of a series of arches spanning the space between the wall and the boiler and rem ovableindividually therefrom, and means for separately suspending and adjusting the arches of the series.

3. The combination with a steam-boiler,

vand a rear wall, of bridge-bars in rear of the boiler, a suspension-plate on said bars, an arch resting on the wall and against the boiler, a bolt connected to said arch, and means for adj ustably connecting said bolt to the suspension-plate.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD WARD.

Witnesses:

B. J. NORTON, E. G. BENNETT.

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