Patent GB-190126375-A (GB)
Title: Improvements in Furnaces.
Inventor: MCCLAVE WILLIAM
Filed: 1901-12-24
Granted: 1902-05-15
Abstract: 26,375. McClave, W. Dec. 24. Mechanical stoking; fire-bars and grates.-Figs. 1 and 2 show a furnace having fuel-feeding grate mechanism and stoking or fuel supply hoppers, together with mechanism for operating the parts so that fuel will be automatically fed to and over the grate. The grate is inclined, and comprises stationary and movable grate bars 1 and 14 respectively. The movable bars 14 rest upon the antifriction wheels 15, 16, secured to the carrier bars 3, and receive their motion from the power rockshaft 28 and the frame 29. Each moving grate-bar, except the top one, is connected by one or more links 35 with the arms 36 on the rock-shafts 37, which are connected up to the rocking-levers 33. The movement communicated to the bars is regulated by the movable blocks 31 in the frame 29. The throws or movements of the blocks 31 are altered by adjusting the blocks with respect to the shaft 28. To obtain a graduated movement of the bars from one end of the grate to the other, the blocks 31 are proportionately moved from one side of the frame to the other by using a bar or rod 59, which extends through apertures formed in lugs secured to the rear faces of the movable blocks. The grate is particularly adapted for handling fine fuel, and to that end the upper reciprocating grate bars are formed with closed upper surfaces and with removable fire-bearing surfaces consisting of a series of fingers or caps 9 provided with locking-means, preferably with a clip 40, Figs. 17 and 19, or fastening-device such as a piece of wire or metal with or without a head. The grate bars, stationary and movable, below the upper bars are preferably formed with fire-supporting surfaces integral with the body portions of the bars, and these surfaces have elongated tapering slots to introduce air. The stoking-hopper 61 is formed with a rear plate 62, which leaves an air space 65 behind it, and below the air space the tuyÞre 66 admits air to prevent the formation of smoke at the top of the grate. The swinging gate or door 71 regulates the amount of fuel passing out of the hopper, and the outer swinging door 79 controls the quantity of air admitted to the hopper. The reciprocating slide or pusher 88 works between the dead plate 27 and the hopper bottom plate 82, and is mounted on the front antifriction wheels 91. The rocking member 93, Fig. 2, is loosely journalled on the rock-shaft, and the sleeve 94 only engages the shaft 28 at its ends. The wrist pins 98 are connected with the pushers 88 by rods 99, which are not influenced by a longitudinal movement of the sleeve 94 and the wrist pins 98 when the sleeve is moved longitudinally on the shaft. The movemeut of the shaft 28 is imparted to the sleeve 94 to a greater or less extent by means of a collar 104 secured to the shaft and provided with a laterallyprojecting lug which extends into a recess or notch in one end of the sleeve 94. Both pushers may be operated from one lugged collar 104. A cut-out bar 115 is provided, and is preferably operated by mechanism which is able to actuate it intermittently, continuously, or at irregular times.