IMPROVEMENTS IN GRATE BARS
Year: 1872

page_text: LETTERS PATENT to James Pickup, of Tong, near Bradford, in the
County of York, Engineer, for the Invention of "IMPROVEMENTS IN
GRATE BARS."
Sealed the 6th August 1872, and dated the 28th May 1872.
PROVISIONAL SPECIFICATION left by the said James Pickup at the
Office of the Commissioners of Patents, with his Petition, on the
28th May 1872.
I, JAMES PICKUP, of Tong, near Bradford, in the County of York,
Engineer, do hereby declare the nature of the said Invention for "In-
PROVEMENTS IN GRATE BARS," to be as follows:-
This Invention relates to the class of grate bars of furnaces composed
of parallel bars connected by cross bars for the support of the fuel, the
intervening spaces or openings serving to admit air to secure combustion.
The defect of bars so constructed is the difficulty experienced by the
"stoker" or attendant when raking or clearing the bars of "clinker "
by means of a rake, the latter catching and locking within the inter-
vening spaces.

page_text: In constructing grate bars according to my Invention I employ
parallel longitudinal bars, and these are connected by waved or curved
connecting bars. The connecting point of each waved or curved bar
is about opposite the intervening space at the other or opposite con-
necting point of the said curved or waved bar, with the opposite parallel
or longitudinal bar, so that whatever the position of the rake within
the furnace it cannot fall between or become locked within the inter-
vening space of any of the bars.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Pickup in the Great Seal Patent Office on
the 28th November 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
PICKUP, of Tong, near Bradford, in the County of York, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-eighth day of May, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said James Pickup, Her special licence that I, the
said James Pickup, my executors, administrators, and assigns, or such
others as I, the said James Pickup, my executors, administrators, and
assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for “IMPROVEMENTS IN GRATE BARS," upon
the condition (amongst others) that I, the said James Pickup, my
executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.

page_text: NOW KNOW YE, that I, the said James Pickup, do hereby declare the
nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement and accompanying Sheet of Drawings (that is to
say):
This Invention relates to the class of grate bars of furnaces composed
of parallel bars connected by cross bars for the support of the fuel, the
intervening spaces or openings serving to admit air to secure combustion.
The defect of bars so constructed is the difficulty experienced by the
"stoker" or attendant when raking or clearing the bars of "clinker "
by means of a rake, the latter catching and locking within the inter-
vening spaces.
In constructing grate bars according to my Invention I employ
parallel longitudinal bars, and these are connected by waved or curved
connecting bars, the connecting point of each waved or curved bar is
about opposite the intervening space at the other or opposite connecting
point of the said curved or waved bar with the opposite parallel or
longitudinal bar, so that whatever the position of the rake within the
furnace it cannot fall between or become locked within the intervening
space of any of the bars.
Such being the nature and object of this my said Invention I will
now proceed to describe the same fully, and in order that the same may
be distinctly understood, I have hereunto annexed a Sheet of Drawings,
and have marked the same with figures and letters of reference, the
same letter referring to the same part in the various views or Figures.
Fig. 1 is a plan view of the grate bars' frame; Fig. 2 is a section
of the same with bars shewn; Fig. 3, plan of the bars; Fig. 4, cross
section of bars and frame through line A, B. C, C, are a series of
parallel longitudinal bars; D, D, are the waved connecting bars; E is
the frame which receives the grate bars. The lugs F, F, are received
in the recesses G, G, of the frame E.
The grate bars are made in short lengths, so that on any one length
becoming burnt or destroyed it may be removed and replaced without
destroying the remaining portion of the bar, so that unequal action of
the fire on a portion of the bars will not necessitate the removal of any
portions of the bars that are not destroyed.

page_text: Having thus fully described the nature and particulars of this my
said Invention, together with the manner in which the same is to be
or may be performed, I would have it distinctly understood that I
claim as my Invention, the constructing of grate bars by uniting two
longitudinal bars with a series of waved or curved cross bars, and
whether cast whole or in parts or sections, as herein described and shewn
in the accompanying Sheet of Drawings.
In witness whereof, I, the said James Pickup, have hereunto set
my hand and seal, this Twenty-sixth day of November, in the
year of our Lord One thousand eight hundred and seventy-two.
Witness,
WALTER BRIERLEY,
Tasker & Brierley,
Patent Agents,
Halifax & Bradford.
JAMES PICKUP. (L.S.)