IMPROVEMENTS IN FURNACE BARS
Year: 1880

page_text: LETTERS PATENT to Edward Newbold, of New Wandsworth, in the County
of Surrey, and of Nottingham, in the Town and County of the Town of
Nottingham, for an Invention of "IMPROVEMENTS IN FURNACE BARS."
PROVISIONAL SPECIFICATION left by the said Edward Newbold at the Office
of the Commissioners of Patents on the 7th May 1880.
EDWARD NEWBOLD, of New Wandsworth, in the County of Surrey, and of
Nottingham, in the Town and County of the Town of Nottingham. "IMPROVE-
MENTS IN FURNACE BARS."
My improvements are applicable to furnace bars of the ordinary description, and
also to alternately fluted and toothed bars, and consist in forming transversely or
diagonally across the top of the furnace bar a number of V-shaped grooves, or
grooves of the form of an inverted V, open at the top. When the said bar is pro-
vided with teeth or lugs upon its sides, having alternate on each side grooves, or
flutes between them, the said V or inverted V-shaped grooves may extend from
the grooves or flutes on one side to the corresponding grooves or flutes on the
opposite side of the bar; or the said V or inverted V-shaped grooves may extend
diagonally between the alternate flutes or grooves of the said bar.
I may also form the said V or inverted V-shaped grooves in the teeth or lugs
themselves, and also form V or other shaped grooves in the shoulders of the bars,
communicating with the grooves or flutes nearest the shoulders, thus admitting of
the passage of air up the shoulders over the dead plates and hearers which support
them.

page_text: Figure 1 is a plan of one of my improved furnace bars.
Figure 2 is a side elevation of the same.
Figure 3 is a section on the line a, a, Figure 2.
Figure 4 is a plan of another form of bar embodying my improvements.
Figure 5 is a side elevation of the same.
Like letters indicate like parts in the different Figures.
The furnace bar shown in Figures 1, 2, and 3 is provided with grooves or flutes A,
arranged alternately on each side of the bar and with lugs or teeth A' between the
said grooves or flutes. These grooves or flutes may be made of the same width
throughout their entire length (as shown in Figure 5), or they may be wider at
the bottom and taper gradually towards the upper surface of the bar. In the
upper surface of the bar I form V or other shaped grooves or channels B, by means
of which all the grooves or flutes A are connected. I thus obtain a thorough
circulation of air up the sides and over the top of the bar, greatly reducing the heat
and making the bar much more durable. I also form grooves or flutes A" in the
sides and ends of the shoulders of the said bar, with grooves or channels B¹ across
the tops of the said shoulders, and connecting with the grooves or flutes A nearest
to the said shoulders. I thus obtain a current of air on each side, over the
tops, and underneath the shoulders of the bars. I may also form in the teeth or
lugs A¹
grooves or channels similar to the grooves or channels B.
Figures 4 and 5 show a modification of my improvements. This bar is provided
with grooves or flutes A connected by deep channels C, admitting of the circulation
of a large amount of air through the upper portion of the bar, the passage of air
across the extreme upper surface of the bar being provided for by means of V or
other shaped grooves B, the said channels C and grooves B being so arranged as to
place all the grooves or flutes A in connection with each other. Thus the bar is
kept cool by a thorough circulation of air up the sides, through the body, and across
the upper surface of the said bar. I provide the shoulders of the bar with channels D,
extending from the nearest groove or flute A to the top of the said shoulders.

page_text: My improvements, consisting of the grooves or channels B and C, are applicable
to ordinary furnace bars as well as to those provided with the alternate grooves or
flutes A upon their sides, but are most valuable when used in conjunction with the
said alternate grooves or flutes.
In witness whereof, I, the said Edward Newbold, have hereunto set my hand
and seal, this Twenty seventh day of October, in the year of our Lord One
thousand eight hundred and eighty.
EDWARD NEWBOLD. (L.S.)