US747091A

US747091A - Underfeed-stoker.

Info

Publication number: US747091A
Application number: US16377303A
Authority: US
Inventors: Joseph M Searle
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-06-30
Filing date: 1903-06-30
Publication date: 1903-12-15
Anticipated expiration: 1920-12-15

Description

2 SHEETS-.SHEET 1.

PATENTED DEU. 15, 1903.

J. M. SEARLB. UNDERPEED STOKER.

APPLICATION FILED JUNE so, 190s.

No MODEL.

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J. M. SEARLE. UNDERPEED STDKER.

MPLIGATION FILED' JUNE 30.1993.

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Patented '.jecember 15, 1903.

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JOSEPH M. SEARLE, OF PITTSBURG, PENNSYLVANIA.

UNUERFEEDeSTOKER.

SPECIFICATION forming part of Letters Patent No. 747,091, dated December 15, V1903. Application led .Tune 30, 1903. Serial No. 163,773. (No model.)

To all whom, t may concern:

Be it known that I, JOSEPH M. SEARLE, a citizen of the United States, and a resident of Pittsburg, Pennsylvania, have invented ce1- tain Improvements in Underfeed-Stokers, of which the following is a specification.

One object of my invention is to so construct an underfeed-stoker as to provide simple and effective means for causing the forward feed of the fuel through the trough, and

a further object is to insure a sufficient supbut showing the fueLpusher in the raised,

position; and Figs'. 4, 5, and 6 are views of twyers employed in connection with the stoker.

1 represents the hopper for containing the fuel, this hopper having at the lower end a box 2, which communicates, through a neck 3, with the trough 4, into and through which the fuel is fed, the combustion of the fuel taking place at the open top of this trough and the fuel being fed forwardly and upwardly through the trough, so as to constantly maintain a supply at the combustion-surface- The bottom of the boX 2 is formed bya vibrating pusher 5, hung to a transverse pin or shaft 6, and disposed at intervals 4along the bottom of the trough are similar vibrating pushers 5,'hung to transverse pins or shafts 6?. When either pusher is in its lowermost position, it closes an opening in the bottom of the box or trough, but when raised from this position it imparts a forward and upward impulse to the fuel resting upon it, so that by a succession of operations the fuel is y fed forwardly through the trough and at the end of thetrough insuring the rise of the fuel at said end because of the forward movement imparted to said mass.

Each of the vibrating pushers 5 5a has a segmental web 8, projecting rearwardly from its outer end, and a plate 9, depending from each side, these plates 8 and 9 serving to prevent any escape of fuel through the openings in the bottom of the box or trough when the vibrating pusher is raised above said. bottom.

A rockshaft 10, mounted in suitable bearings at the end of the box 2, has two arms 11 and 12, the arm 11 being connected to the piston-rod of a power-cylinder13 and the arm 12 being connected by a link 13 to a pin 14 on one of the side plates 9 of the vibrating pusher 5.

The pushers 5 5a are connected by means of links 15 so as to provide for the simultaneous operation of the entire series, and the links 13 and 15 may be located at one side only of the pushers or at both sides of the same, as desired, the use of the links at both sides of the pushers being preferred in order to provide for a balanced application of power thereto.

From the upper edge of the inclined sides and curved end of the trough 4 projects a horizontal flange 16, and in said iilange ou each side of the trough are formed openings 17, preferably beveled for the reception of the correspondingly-beveled necks of a series of

twyers

18 and 19, the upper ends of which curve inwardly and form outwardly-flaring grates 20 for the support of the fuel at the combustion-surface of the trough, the inwardly-projecting upward portion of each twyer forming a beveled shoulder 21, which directs the fuel away from the flaring grate formed by the upper end of the twyer and tends to prevent clogging of said grate,which would interfere with the free escape of air therefrom.

Each twyer-pipe is open at the lower end for the free ingress of air, flow of air up- IOO twyers 18 and v19 are dead-plates 22, which abut against external flanges 23 on the twyers and form a fuel-supporting surface outside of the same. Instead of dead-plates, however, grated surfaces may be used when it is desired to maintain active combustion of the fire outside of the twyers.

The twyers 18 are simple pipes with beveled necks 24 and slightly-enlarged heads forming the gratedtops of the twyers; but the twyers 19 have right-angled heads 25, each providing a grated top 2O at the side of the trough and a similar grated top at the end of the trough, as shown in Figs. 2 and 4.

As each of the parts of my improved stoker is independent of the others, repairs can be readily effected by simply removing the defective part and replacing it by a new one.

Having thus described my invention, I claim and desire to secure by Letters Paten l. The combination in an underfeed-stoker, of the longitudinal fueltrough with twyers detachably mounted upon said trough and having depending tubes alongside of the trough, substantially as specified.

2. The combination in an underfeed-stoker, of the longitudinal fuel-trough, with a grated surface at the top of the same, and a shoul- 'der below said grated surface for directing the fuel away from the latter, substantially as specified.

3. The combination in an underfeed-stoker, of the longitudinal fuel-trough with an outwardly-flaring grated surface at the top of the same and a shoulder below said outwardly-flaring grated surface for directing the fuel away from the latter, substantially as specified.

4. The combination in an underfeed-stoker, of the longitudinal fuel-trough having an outwardly -extending flange at the top with twyers each consisting of a pipe passing through an opening in said flange and depending alongside of the trough, each twyer having a grated air-discharge head directed toward the trough, substantially as specified.

5. The combination in an underfeed-stoker, of the longitudinal. fuel-trough having an outwardly-extending flange at the top with twyers each consisting of a pipe passing through an opening in said Iiange and depending alongside of the trough,each twyer having a grated air-discharge head directed toward the trough and forming an outwardly-flaring support for the fuel, substantially as speciy fied.

a grated face extending toward the trough, substantially as specified.

7. The combination in an underfeed-stoker, of the longitudinal fuel-trough having an outwardly-extending flange at the top, with twyers each consisting of a pipe passing through an opening in said flange and depending alongside of the trough, said twyer having an inwardly-curved upper end terminating in an outwardly-flaring grated face extending toward the trough, substantially as specified.

8. The combination in an underfeed-stoker, of the fuel-trough having an outwardlyextending flange at the top said flange having openings therein, with a series of twyers each consisting of a pipe passing through one of said openings in said flange and having an inwardly-directed top terminating in a grated face and forming a shoulder at the top of the trough, substantially as specified.

9. The combination in an underfeed-stoker, of the fueltrough having an outwardly extending flange at the top, said flange having openings therein with a series of twyers each consisting of a pipe passing through one of said openings in said flange and having an inwardly-directed top terminating in an outwardly-flaring grated face and forming a shoulder at the top of the trough, substantially as specified.

10. The combination in an underfeedstoker, of the longitudinal fuel-trough having an outwardly-extended flange at the top, said flange having openings therein with a series of twyers each consisting of a pipe depending alongside of the trough, said pipe having a neck seated in a corresponding opening in the flange of the trough and having an inwardlydirected and grated air-discharging upper face, substantially as specified.

11. The combination in an underfeedstoker, of the longitudinalfuel-trough having an outwardly-extending flange at the top, with a series of twyers seated on said flange, fuel-supporting plates also seated on said flange outside of the twyers, and flanges on the twyers contacting with said plates, substantially as specified.

12. The combination stoker, of thelongitudinal fuel-trough having an outwardly-extending flange at the top, said fiange having openings therein and twyers each consisting of a pipe passing through one of the openings in said flange, the twyers at the outer end of the trough having heads with portions at an angle one to the other, substantially as specified.

IOC

IIO

in an underfeed- In testimony whereof have signed my l name to this specification in the presence of two subscribing witnesses.

JOSEPH M. SEARLE. Witnesses:

S. A. HEAPS, WILLIAM A. BALM.