Specification of William Brunton : fire grates.

  • Brunton, William
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Brunton : fire grates. Source: Wellcome Collection.

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    JBruntons Improvements in Fire Grates. grate bars, and each alternate moveable bar having proper projections, with curved feet, suited to their respective eccentric circular bearings, rest thereon. The eccentric bearers being turned round by the power of a steam engine, or any other convenient power, will communicate to the moveable alternate bars the required motion, that is, by the eccentricity of the circular bearings the bars 5 resting thereon will be raised above the fixed bars, move onward in the direction in which the eccentric bearers are turned, at the end of their range fall below the fixed bars, upon which they deposit the fire, and while depressed return to repeat their action upon the fire. I produce the second motion by con¬ structing two or more eccentric or revolving bearers, suited to the width of the 10 grate and similar to those used in producing the first motion, but having at proper intervals, suited to the thickness of and width between each grate bar, circular bearings having from one quarter to three quarters of an inch eccen¬ tricity with the axes of the bearer, these bearing having their eccentricity alternately on opposite sides of the centre of the bearer; the said revolving 15 bearers I connect by wheels, revolve in the same direction and time, and the eccentric bearings disposed in the same order as already described for those of the first motion, and the grate bars resting upon their respective bearings; the said revolving bearers being turned round in the direction in which it is intended to move the fire, one series of alternate bars will rise up and support the fire 20 and move onward, whilst the other series depressed will move in the contrary direction. In producing the several modifications of the third motion I con¬ struct one or more revolving bearers, similar to those already described as suitable to the second motion, but the grate bars, instead of resting wholly upon the revolving or eccentric bearers, are made to rest or slide, partly or 25 altogether, upon fixed bearers. The surface upon which the bars slide or move, and also the face of those parts of the bar which rest or slide thereon, I make in the same direction in which it is intended the bar should be moved, and also the bars do not rest upon the revolving bearer with curved feet, (as in the first and second motion,) but are connected therewith SO by two straight parallel cheeks attached to or cast with the said bars, at such distance from each other as is equal to the diameter of the circular eccentric bearings of the revolving bearer, and the said parallel cheeks are attached to the bar at such an angle or position as will suit the movement intended to be given, that is, they are placed at right angles to the intended line of motion, 35 and so long as to permit the eccentric bearings to revolve between them without communicating any other motion than that at right angles to the said cheeks; thus, if the motion is intended to be in the direction of the length of the bars, the surface of the fixed bearer, and also that of the part of the bar
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