US902002A

US902002A - Combined grate and air-heater.

Info

Publication number: US902002A
Application number: US26530205A
Authority: US
Inventors: Alfred D Rathbone
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-06-15
Filing date: 1905-06-15
Publication date: 1908-10-27
Anticipated expiration: 1925-10-27

Description

, A, D. RATHBONE. COMBINED GRATB AND AIR HEATER.

APPLICATION FILED mm: 15, 1905.

Patented Oct. 27., 1908.

2 SEEETfi-SHEET 1.

\ v \s 0 NBWMW' A. D. RATHBONE. COMBINED, GRATE AND AIR HEATER.

V APPLICATION FILED JUNE 15, 1905. 902,002. Patented Oct. 27, 1908. 2 SHEBTSv-SHEET 2.

mulllllllllml mum MQ M ALFRED D. RATHBONE, OF GRAND RAPIDS, MICHIGAN.

COMBINED GRA'IE AND AIR-HEATER.

Specification of Letters Patent.

Patented Oct. 27, 1908.

Application filed June 15, 1905. Serial No. 265,302.

To all whom it may concern:

Be it known that I, ALFRED D. RATHBONE, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in a Combined Grate and Air-Heater; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in a combined grate and air heater; and its object is to simplify the construction; to provide a device easily taken apart, or assembled; and to provide the same with various new and useful features hereinafter more fully described and particularly pointed out in the claims, reference being had to the accompanying drawings, in which:

Figure 1. is a front elevation of a device embodying my invention with the ornamental front removed; Fig. 2. a vertical section of the same on the line 22 of Fig. 1; Fig. 3. a horizontal section of the same on the line 38 of Figs. 1 and 2; Fig. 4. a vertical section of the same on the line 4-4 of Fig. 2; Fig. 5. a side elevation of the same with one of the side plates removed; and, Fig. 6. a plan view of the same with the top plate removed.

Like numbers refer to like parts in all of the figures.

The outer case is preferably of cast iron plates as follows: 1 is the back plate 1 are side plates; 1 the upper front plate; 1 the lower front plate; 1 side front plates; 1 the top plate and 1 the bottom plate.

The front outline of this case is rectangular, and the case is made narrower and lower at the rear than at the front. The air to be heated is admitted to the case through side openings 2 near the bottom and front thereof, and circulates upward, around and between the various internal parts of the device hereinafter described, and escapes either through a front opening 3 into the room where the device is coated, or is conducted by a pipe to an upper room by removing the p ate 4 which 0 oses an opening in the top plate 1 and connecting a suitable pipe with this opening. In the middle front portion of this case is located an open front fire box 5 consisting of a casting having a vertical and forwardly inclined back portion and forwardly extended side portions flanged at their front edges and bolted to the front side plates 1. Engaging these side portions and arranged in front of the lower front part of the fire box is a front grate 6, and at the bottom of the fire box is a bottom grate 7 provided with pivots 8 at its ends and pivotally supported thereby upon a frame 21 extending beneath the pivots and across at the rear of the grate and provided with lugs 22 to engage and support the front of the grate and permit the grate to be tilted downward at the rear to dump the fire. This frame 21 and the fire box 5 are supported upon the top of the ash pit 10, which ash pit consists of a bottom, back and ends, cast integrally, and having an open front side closed by an ornamental front through which air is admitted below the grate, (not shown). This ash pit is supported u on a bottom chamber 18 arranged in the ower part of the case and extending from front to rear of the same and is bolted to the fire-box as indicated in Fig. '5. In the bottom of this ash pit near the rear thereof is an opening for dumping the contents of the ash pit and closed by a slide 11, which slide may be withdrawn by means of a handle 12 connected thereto and projecting at the front of the device.

The front of the chamber 18 is provided with a clean-out opening closed by a removable plate 14. Extending from beneath the openmg in the ash pit 10, downward and rearward through the bottom chamber 18, is a chute 13 having its upper and rear inclined surface provided with numerous openings 13 for the escape of dust'or gas that arises from the ashes and cinders when dumped. At the rear of the case and opening into the rear of the bottom chamber 18 are vertical fiues 1 6 and 17 formed by aflue plate 23 having rearwardly extended side portions extending to the back plate 1 of the case, and a middle partition 24. extending from the plate 1 to the plate 23. This plate 24. is prolonged downward within the chamber 18 as at 24 and extends forward to the chute 13.

Mounted on the top plate is a collar 20 to which a pipe may be connected to carry away the smoke. This collar is ermanently connected with the flue 16. xtending from the top of the fire box rearward to these vertical flues l6 and 17 and connected thereto by

openings

25 and 26 is a top flue 15 provided with a damper 19 to close or openthe opening 25, as occasion requires.

This damper is operated by the rod 27 ex tending through the front plate 1*. Beneath the grate and slidable toward and from the front thereof is a T-shaped slice 9 mov able in ways 9 on the under side of the grate and supported thereby. This slice is provided with a row of upwardly projecting teeth 9 extending between the bars of the grate and above the same a short distance, whereby the fuel may be agitated and shaken down as occasion requires by any suitable handle'or hook attached to the slice. This grate and slice will turn on the pivots 8 downward at the rear and upward at the front and thus dump the contents of the fire box into the ash pit, from whence said contents may be discharged downward through the chute 13 by withdrawing the slide 11. The dust and gas arising from the ashes and cinders will escape upward through the openings 13 and be drawn up the flue 16 into the chimney.

When the damper 19 is open, the draft is directly up into the chimney through the opening 25 and collar 20. When the damper 19 is closed, the hot products of combustion pass through the opening 26 down the flue 17, forward in the bottom chamber 18, around the front side of the chute 13, and thence rearward in the chamber 18, and up the flue 16 to the chimney. The bottom chamber, ash pit, fire box, rear flues, and top flue thus provide heating surfaces to heat the air entering at the openings 2 and escaping at the

o ening

3 or 4.

It will also be noted that the described structure is so organized as to be readily assembled or taken apart and that any one or more of the plates forming the case can be independently removed, or that the fire box or any other of the inner portions of the device can easily be removed and replaced for repairs without disturbing the other parts. For this purpose the bottom plate is inclined upward and outward near the margins and thence flanged downward and outward at the edges to receive and sup ort the back, sides and lower front. This a so strengthens the bottom plate and affords a channel in which the nuts or bolts are accessibly located. These parts are separably secured to this flange by bolts. The back at each side is provided with inset edges, to which the edges of the ends are secured by bolts. The front portions are each separately secured to inturned flanges on the ends. The flue plate 23 is flanged at the edges and the plate 24 is held in place by lugs and ribs on the back and flue plate without other fastening. The ash pit 1O rests on the bottom chamber without being fastened thereto, and supports the fire-box, which is open at the top and slides between flanges on the open end of the flue 15 and is not otherwise secured thereto. Thus by detaching the side front plates 1 and the plate next below the same, the fire-box and ash pit can be taken out, or replaced. The flue 15 is flanged and bolted at the rear to the flue plate 23 and at the front in like manner to the upper front plate 1*. By removing this plate, this flue can be taken out without disturbing the other parts. In like manner, the back or end plates may severally be detached or replaced without disturbing the other parts.

The device is also readily assembled by beginning at the rear and adding the various parts toward the front or taken apart in reverse order.

The ash pan construction herein shown is reserved for a divisional application in accordance with the requirement of the office for division.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is:

1. In a heater, a casing, a firebox, an ashpit having a downward and forwardly inclined wall, a chamber beneath the ash-pit, a flue communicating with the fire-box and the chamber, a chute communicating with ber, said chute having perforations in its side toward the flue, an ash pit above the chute, a slide to close the upper end of the chute, a firebox above the ash pit, a top flue connect ing the fire-box with both sides of the rear flue, means for connecting one side of the rear flue with a chimney, and a damper to disconnect the top flue and the other side of the rear flue.

3. The combination of a case, a bottom chamber in the case, an ash pit above said chamber and having a bottom opening, a slide to open and close said opening, a chute extending downward from said opening through the bottom chamber and having openings in its rear side, a grate pivotally supported above the ash pit and adapted to turn downward at the rear and upward at the front, a fire box above said grate, vertical flues extending upward from the rear of the bottom chamber and a partition between said flues and extending within the rear of the bottom chamber and to said chute, a top flue connecting the fire box and the vertical flues and a damper and collar connected to one of the vertical flues.

inlet and exit of air, a bottom chamber ex' tending from front to rear of the case, a verits bottom a slide at the bottom of the ashtical flue plate extending upward from the pit to operate over said ash-pit opening, bottom chamber and having rearwardly ex- I a grate pivotally supported above the ash tended sides flanged and bolted to the rear l pit, a fire box above the grate, a top flue of the case, a partition extending from the connecting the flre box with openings 1n the flue plate to the rear of the case and within flue plate at each side of the partition, and a the rear portion of the bottom chamber, an damper to close one of said openings.

ash pit mounted on the bottom chamber, a In testimony whereof I aflix my signature chute extending from the ash pit downward in presence of two witnesses.

through the bottom chamber and provided ALFRED D. RATHBONE. with openings to permit dust to pass from Witnesses:

the chute during the passage of ashes through LUTHER V. MoUL'roN,

the latter, the ash-pit having.an opening in GEORGIANA OHAoE.