An Improved Machine for Coating Paving Blocks and other like Objects or Substances with Tar or other Liquid or Composition.
Year: 1898

page_text: Date of Application, 5th Dec., 1898-Accepted, 1st Apr., 1899
An Improved Machine for Coating Paving Blocks and other like
Objects or Substances with Tar or other Liquid or Composition.
I, JUSTIN MCSWEENEY, of No. 359, George Street, Sydney, in the Colony of
New South Wales, Contractor, do hereby declare the nature of this invention and
in what manner the same to be performed to be particularly described and
ascertained in and by the following statement:-
This improved machine for coating paving blocks and other like objects or
substances with tar or other liquid or composition has been specially devised
in order to facilitate the tarring of wood blocks used in the paving of streets
roads etc. though it may be used for tarring or coating with like or other liquid
or composition wood or other blocks or like objects or substances for other
purposes.
This improved machine for coating paving blocks and other like objects or
substances with tar or other liquid or composition consists of a semi-circularly
bottomed tank preferably set above a furnace on wheels and in which is a skeleton
wheel carrying forks or prongs which revolve close to but clear of the semi-
circular bottom of said tank within an open channel or guides. At one end of
this semi-circular tank is an intake table having automatic feeding devices and
at the other and discharge end are rubbers or brushes (which may be either
stationary or made to revolve) set in or just beyond a tangential continuation of the
tank so that the block or subject passing upwardly from the tank will pass between
said rubbers or brushes and have excess liquid cleansed therefrom. There is held
between the cheeks of the continuation of the tank a ramp on one face and a spring
on the other to direct the upwardly travelling block into between the rubbers
or brushes and to facilitate its expulsion and there are also adjustable spring
strips or guides to direct the blocks between some of the rubbers or brushes. An
inclined delivery grating receives the block from the rubbers or brushes and
allows it to pass on to another grating having alternately longitudinal and
transverse bars set above a tank or receiver for the drippings. The whole is
preferably covered in and there is a device for indicating the position of the
forks or prongs of the wheel in the tank.
But in order that this invention may be clearly understood reference will now
be made to the drawings herewith in which Figure 1 is a side elevation of this
improved machine for coating paving blocks and other like subjects with tar or
other liquid or composition. Figure 2 is a plan of same with the cover removed.
Figure 3 is an elevation at the intake or feeding end. Figure 4 is a central
transverse sectional elevation and Figure 5 is an elevation at the discharge end:
The tank A having a semi-circular bottom A' which has guides A³ for the
block to slide between contains the tar or hot liquid and it is set above a fire
chamber A2 at one end of which is a furnace having fire-bars A³ a door A4 and a
chimney A5. The tank and fire chamber form an oblong construction or box
supported on wheels A6. In the tank A and centrally thereof are side pieces or
guides A forming an open trough or channel or guide and a skeleton wheel B
supported by a spindle B¹ in bearings B on the sides of the tank with arms B³

page_text: ending in prongs or forks B (which are held in their relative positions by
rings B) revolves in said open channel. On the spindle B is a toothed pinion 15
gearing with a pinion on driving spindle C in bearings C to which spindle C
motion is imparted by crank handle when it is desired to revolve said wheel B
and the prongs or forks B*. At the discharge end of the tank A is a tangential
continuation of the bottom formed within cheek pieces D. On or near the
beginning of this continuation is a ramp piece and just outwardly of the
ramp D and within the cheek pieces D is a back piece 12 supporting a spring 1.
The ramp and spring D3 guide the block or subject as it leaves the liquid
contained in the tank A first. between the rubber or brushes E E E and E and
then assist in its expulsion over the curved delivery grating 1 whereon it is held
or guided by means of side springs 1 fastened to cheek. pieces D and adjustable
by means of the set screw D and being pushed forward by the following advancing
block or subject passes through rubbers or brushes E and E onto the grating
formed of longitudinal bars I and transverse bars D8 whence it finds its way on
to a receiving grating (likewise composed of sets of longitudinal and transverse
bars D and D) which is set above a tank or receiver H for the drippings.
On the intake table A is a sliding slat F connected by bar F¹ to sliding rod F
which is knuckle-jointed to a rod connecting it to crank on a spindle F.
To this spindle F motion is imparted by toothed pinion F6 and toothed wheel B6
on spindle B¹ Thus as the skeleton wheel B revolves the slat F has reciprocating
motion and will draw or push blocks or subjects placed in front of it regularly and
at the proper time into the open channel of the tank A. An indicator wheel G
whereon the positions of the forks or prongs are marked is fixed on the spindle B¹
so that the attendant may observe the relative position of each prong and in case
of hand supplying when the devices with the automatic feeding slat F are not
in use may know at what moment and at what speed to feed the blocks. To avoid
or minimise splashing of the liquid the cover G₁ is placed over the top of wheel B
and other parts.
In operation the blocks are placed on the table A7 at the intake end of the
tank A and placed directly by hand in the open channel or trough or fed in
front of the slat F so that they will be pushed or slid by the automatic feeding
devices one by one into the open channel and within the influence of the revolving
prongs B which cause said blocks to pass along the bottom in said open channel,
through the tar and force them between the ramp 1 and spring D and between
the brushes or rubbers and on to the grating D as hereinbefore described whence
they fall upon the other gratings coated with the tar or liquid but well cleansed
or brushed and with the excess of coating fairly removed therefrom.
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:-
First. An improved machine for coating paving blocks and other like objects
or substances with tar or other liquid or composition the essential feature of which
is a tank having a semi-circular bottom on or close to which revolve the prongs
of a skeleton wheel substantially as and for the purposes herein described and
explained.
Second. In a machine for the purpose set forth the combination and arrangement
with a tank having a semi-circular bottom and a skeleton wheel revolving therein
of guide bars forming an open channel or trough on said bottom substantially as
herein described and explained.
Third. In a machine for the purpose set forth the combination and arrangement
with a tank having a semi-circular bottom and a skeleton wheel revolving therein
of an intake table having thereon a reciprocating or sliding slat or feeder and
devices for actuating same substantially as herein described and explained.
Fourth. In a machine for the purpose set forth the combination and arrange-
ment with a tank having a semi-circular bottom and a skeleton wheel revolving

page_text: therein of the particular sets of rubbers or brushes for cleansing or removing excess
tar or composition from blocks or subjects impelled through said tank by said
skeleton wheel arranged in the manner and for the purposes described and
explained.
Fifth. The particular combination and arrangement of mechanical parts all
together forming an improved machine for coating paving blocks and other like
objects or substances with tar or other liquid or composition substantially as herein
described and explained and as illustrated in the drawings.
Dated this Thirty-first day of October One thousand eight hundred and ninety-
JUSTIN MCSWEENEY,
G. F. Redfern & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.