US1790885A

US1790885A - Automatic stokeb

Info

Publication number: US1790885A
Authority: US
Publication date: 1931-02-03
Anticipated expiration: 1948-02-03

Description

Feb. 3, 1931. w E T NER 1,790,885

AUTOMATIC STOKER Filed June 1, 1928 2 Sheets-Sheet l NVENTOR,

.BY W

A TT ORNE Y Feb. 3, 1931. w E TURNER 1,790,885

AUTOMATIC STOKER I Filed June 1, 1.928 2 Sheds-Sheet 2 31 vs 0 55 a 15 16 66 o o 5 20 12 Q3 2 I 46 I4 A TTORNEY Patented Feb. 3, 1931 UNITED STATES PATENT; OFFICE WALTER E. TURNER, PIQUA, OHIO, ASSIGNOB, BY MESNE ASSIGNMENTS, TO THE CLEVELAND STOKEB. COMPANY, OF CLEVELAND, OHIO AUTOMATIC STOKER Applicationflled June '1, 1928. Serial No. 282,115.

This invention relates to new and useful improvements in automatic stokers.

It is one of the principal objects of my invention to provide an economical and eflicient automatic stoker in which the movable and stationary grates have a common, central bearing below the grate line. The bearing is compact and self contained, and has no support other than the retort from which it depends.

It is another object of my invention to provide a movable grate through which the fire ashes will constantly sift and which wil keep the fire bright at all times.

Other important and incidental objects will be brought out in the following specification and particularly set forth in the subjoined claims.

In the accompanying drawings illustrating my invention, Fi re 1 is a top plan view of my automatic sto er, showing the grate bars. Figure 2 is a longitudinal sectional view taken through the stoker on theline 2-2 of Figure 1. Figure 3 is a bottom plan view of the stoker. And Fi re 4 is a cross sectional view taken through the drive mechanism on the line 44 of Figure 2.

Referring to the accompanying drawings for a detailed description of my invention,

the numeral 1 designated a hopper for use J ournaled in in connection with the same. a gear casin 2 integral with the hopper 1 is a drive sha t 3 connected to a motor, not shown. Fast on this shaft 3 is a worm gear 4 that meshes with a gear 5 fixedly secured to a vertical shaft 6 journaled in the casing 2.

Fast on the shaft 6 is a worm 7 which engages a gear 8 on a horizontal shaft 9 journaled in hearings in the casing 2.

The shaft 9 is connected to and supports one end of a screw conveyor shaft 10 which is rotatable in the bottom of the hopper 1. Secured to this shaft is a spiral blade or screw 11 for moving the green coal into a retort 12. The latter is secured to the inner end of the conveyor tube 13, which is attached to the hopper 1. (See Figures 1 and 2.)

The retort 12 is elbow shaped, with an open flanged top 14 to deliver the coal into the center of the bowl of a warm air furnace (not shown). Formed on the curved portion of the bottom of the retort casting 12 is 16 above a piece 17 resting upon a cross pin- 18, is a metal block 19 formed at its top portion with a flange 20. Secured to the latter by 'bolts 21 are upwardly curved arms 22 formed with horizontal fiat ends 23. Attached to these ends 23 by bolts 24 is a segmental ring 25 which supports the radial bars 26 of a stationary grate 27. Pivotally mounted on the pin 16 between the block 19 and the boss 15 is the hub portion 28 of amovable spider 29. The curved arms of this spider terminate at their upper ends in horizontal cars 30 to which a segmental ring 31 formed with radial grate bars 32 is secured. (See Figures 1 and 3.)

Secured to the under surface of the flange 14 on the top of the retort casting 12 is a. fixed Referring to Figures land 2, there projects inwardly from the hopper casing 1 a ledge 36 in which there is journaled a vertical shaft 37 upon the lower end of which a bevel gear 38 is fast. This gear 38 is in mesh with a bevel gear 39 fast on a horizontal shaft 40 journaled in the hopper 1 and projecting through its extension 2. (See Figure 2.)

For the purpose of rotating the shaft 40, there is secured to its outer end within the casing 2, a gear 41 which meshes with a gear 42 fast on the shaft 9 that is driven by the means hereinbefore described. Fast on the upper end of the shaft 37 is a disc 43 to which there is pivotally secured by a pin 44, one end of a shaker rod 45. At its other end the rod 45 is pivotally connected by a pin 46 to one end of the ring 31 of the movable grate. Therefore, when the conveyor shaft 10 is rotated to move the green coal into the it and to keep the fire bright while the Stoker is in operation.

During the operation of the stoker, the movable and the stationary grate support is at all times under the fire line. Such central bearing provided by the pin 16 and associated parts, is compact and self contained, being independent of any other support. I

Having described my invention, I claim:

1. In an automatic stoker, a retort, means for mechanically delivering coal to said retort, a movable grate associated with said retort, and a pivot bearing for said movable grate, depending from the bottom of the retort.

2. In an automatic stoker, a retort, means for mechanically delivering coal to said retort, astationary grate and a movable grate associated with said retort, and a central support depending from the retort for the stationary and the movable grates.

3. In an automatic stoker, a retort, means for mechanically delivering coal to said retort, a stationary grate partially surrounding said retort, a movable grate of less diameter than the stationary grate, also partially surrounding said retort, and a central support for said grates, depending from the bottom of said retort.

4;. In an automatic stoker, a retort, means for mechanically delivering coal to said retort, a stat-iona grate and a movable grate associated with zaid retort, a pivot pin depending from the bottom of said retort, a spider connected to said pin for supporting the stationary grate, and a spider pivotally mounted on said pin for connection to the S movable grate.

5. In an automatic stoker, a retort, means for mechanically delivering coal to said retort, a boss formed on the bottom of said retort, a pin projecting downwardly from said boss, a block fixed on the lower end of the pin, arms projecting upwardly from said block, astationary segmental grate secured to the upper portions of said arms, a hub loosely mounted on said pin above the block, arms projecting upwardly from said hub, and a movable grate secured to the upper portion of said arms.

In witness whereof I have hereunto set my hand this 25th day of May, 1928.

- WALTER E. TURNER.