IMPROVEMENTS IN TANKS FOR RETAINING THE HEAT OF PITCH AND TAR OR CREOSOTE USED FOR DIPPING WOOD PAVING BLOCKS to be as follows
Year: 1884

page_text: I GEORGE WALKER of Whitehall Road, Leeds in the County of York, Contractor
do hereby declare the nature of said invention for "IMPROVEMENTS IN TANKS
FOR RETAINING THE HEAT OF PITCH AND TAR OR CREOSOTE USED FOR DIPPING
WOOD PAVING BLOCKS to be as follows:-
"
It being very advantageous to dip each wood block into boiling hot asphalt
separately prior to their being laid for paving for this object I provide a small
receptacle in which to retain asphalt at a boiling heat and of such a construction
that the pavior may have it close to him so that he can readily dip each block into
the asphalt prior to its being laid in position.. By so doing he may be always
certain that the wood blocks may be completely covered or surrounded with
properly tempered asphalt and so guard against the rotting of the wood..
The vessel I employ which forms the subject of my improvements is constructed
as follows: I provide a small tank of sufficient size to allow of a block of wood.
being dipped in it and to admit of a quantity of asphalt therein, into which to dip
such block. This tank is enclosed round its sides in a case, a space between the tank
and the case being provided to allow the heat from a lamp or other source placed
under the tank to surround such tank its full depth preventing thereby the asphalt
from hardening on the sides and retaining the whole of the asphalt at a proper
heat for the dipping process.
The lamp for heating the asphalt is also enclosed in lower part of the hereinbefore
mentioned case.

page_text: COMPLETE SPECIFICATION.
I GEORGE WALKER of Whitehall Road Leeds, in the County of York Contractor
do hereby declare the nature of said invention for "IMPROVEMENTS IN TANKS FOR
RETAINING THE HEAT OF PITCH AND TAR OR CREOSOTE USED FOR DIPPING WOOD
PAVING BLOCKS and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
It being advantageous to dip each wood block into boiling hot asphalte seperately
prior to their being laid for paving for this object I provide a small receptacle in
which to retain asphalte at a boiling heat, and of such a construction that the
pavior may have it close to him so that he can readily dip each block into the
asphalt prior to its being laid in position. By so doing he may be always certain
that the wood-blocks may be completely covered or surrounded with properly
tempered asphalt and so guard against the rolling of the wood.
The vessel I employ which forms the subject of my improvements is constructed
as follows: I provide a small tank of sufficient size to allow of a block of wood
being dipped in it, and to admit of a quantity of asphalt therein into which to dip
such block. This tank is enclosed round its sides in a case, a space between the
tank and the case being provided to allow the heat from a lamp or other source
placed under the tank to surround such tank its full depth, preventing thereby the
asphalt from hardening on the sides and retaining the whole of the asphalt at a
proper heat for the dipping process.
The lamp for heating the asphalt is also enclosed in lower part of the hereinbefore
Imentioned case.
And in order that my invention may be more completely understood reference is
given to the accompanying drawings and to the letters and marks theroon.
DESCRIPTION OF DRAWINGS,
Fig 1 is a part longitudinal elevation and section, Fig 2 a transverse section
Fig 3 a plan looking on the top.
provide the tank a of sufficient sizo to allow of block or blocks of wood to be.
dipped in it, and at the same time to admit of a quantity of asphalt into which to
dip such block or blocks.
This tank a is enclosed round its sides in a case b a space between the tank a and
case 6 being provided to allow the heat from the lamps c placed under the tank a to
surround such tank its full depth, preventing thereby the asphalt from hardening
on the sides and retaining it at a proper heat for the dipping process.
The lamps for heating the asphalt may be applied as shewn in drawings
openings being left in the sides of outer case b through which any number
thereof (such number varying in accordance with the length of the tank a) may
be applied.
At one or both ends of the case b is provided an outlet d, for the fumes from the
lamps c or other products of combustion, and a chimney may be applied at e of

page_text: suitable length. In order to protect the same from wind and rain I provide sliding
doors which may be of wire gauze or metal plates or both, the opening or shutting
of which being regulated by the attendant.
The above described apparatus for the purpose of more readily moving it to one
required position, is mounted on wheels g and to prevent asphalt passing onto
the bearings h of the wheels, provide the shields i at each end of the case b
as shewn.
By dipping the blocks as above described, great strength is obtained, as not only
do they adhere firmly to each other endways, but also to the asphalt on which
they are laid.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed I declare that what
I claim is
The arrangement and application of tank a applied within case 6 and the means
employed for heating the same substantially as and for purposos herein setforth.
1007
J. W. HARDING,
For the Applicant.