Patent GB-189802298-A (GB)
Title: A Mechanical Stoker and Cinder-breaker for Furnace Grates.
Inventor: KUDLICZ JOSEF
Filed: 1898-01-28
Granted: 1899-01-14
Abstract: 2298. Kudlicz, J. Jan. 28. Mechanical stoking; firebars and grates.-Fuel is delivered in a heap from the hopper 1, and is fed along the grate by reciprocating prongs 14 passing between the firebars, which are of special construction. The prongs are raised during their acting movement and depressed during the return. In the arrangement shown in Fig. 1, the prongs are attached to tubes 13, which are supported by rollers 17 mounted on rods 18. These rods are bent at one end, where they pass between rollers 19, 19. At their other ends they are connected together by a cross-bar 20 which is attached to bars 21 capable of sliding in inclined guides. The tubes 13 are yoked together by a bar 24 which is linked by a connecting- rod 32 to a crank on an oscillating shaft 25. This shaft also carries a cam, shown in dotted lines, by which the bars 21 are moved up and down in the inclined slot, the cam being so constructed that, at one position, it shifts endwise the pin on which it acts, so as to disengage it from the cam surface that has raised it and thus allow the bars 21 to drop down the inclined guides. The method of attaching the prongs to the tubes 13 is shown in Fig. 3, which also shows the firebars in section. These are constructed with rounded or prismatic tops and inclined faces, and they are formed with a series of inclined conical air holes opening alternately from opposite sides of the bar. In a modified arrangement, shown in Figs. 18 and 19, the firebars have transverse openings of curved section of such a form as to leave slits across the top of the bar. In this case, moreover, the prongs are attached to bars 65 which are operated directly by hand by means of handles 72. Their farther ends are supported on a bar 67 which may be raised and lowered by means of inclined slots in slide blocks 69 operated by a rod 70 and hand-lever 71. In a further modification, shown in Fig. 20, each bar 65 is supported at each end in a stirrup or yoke 73 which has trunnion pins capable of resting in bearings at the top and bottom of inclined slots, as shown. The upper edges of the bars are serrated. On pushing a bar forward the yokes are first tilted, and then, becoming jammed on the bar, rise up the inclined slots, thus lifting the bar. On withdrawing the bar the reverse movement takes place. The apparatus shown in Fig. 1 is preferably operated by belt or band gearing which rotates a shaft 27*. Means are described for automatically and intermittently throwing this gearing into and out of action. These are shown in Fig. 12. After a certain number of revolutions a cam 42 on a worm-wheel shaft 40 throws over the striking-fork 46 and thus transfers the band to the loose pulley. This carries a cam 47 which operates friction ratchet gear 50, 51, and thus slowly rotates a cam by which, and by means of a lever, not shown, the striking-fork is returned to bring the band back on the fast pulley. Ashes fall through an opening 12, Fig. 1, at the end of the grate, and they may be withdrawn by projections on an endless chain 62 arranged as shown in Fig. 14. The withdrawal is assisted by prongs 64 on the end of the tubes 13 which carry the prongs 14. The special forms of firebars described, and also the ash-withdrawing mechanism, are not claimed.