An Improved Arrangement and Construction of Wheels for Obtainiu a Continuous but Fast and Slow Rotary Motion.
Year: 1894

page_text: Date of Application, 22nd Oct., 1894
Complete Specification Left. 11th July, 1895-Accepted, 17th Aug., 1895
PROVISIONAL SPECIFICATION.
An Improved Arrangement and Construction of Wheels for Obtainiu
a Continuous but Fast and Slow Rotary Motion.
I, THOMAS CONSTANTINE FAWCETT of The Whitehouse Engineering Works,
Hunslet Road, Leeds, in the County of York, Engineer do hereby declare the
nature of this invention to be as follows:-
My invention relates to a new construction and arrangement of wheels for the
purpose of obtaining a continuous but fast and slow rotary motion.
In carrying out my invention I make use of an internally toothed wheel but instead
of the teeth being equi-distant from the centre or axis of the wheel, I form segments
of teeth at different distances from the centre of the said wheel." I also employ
two driving pinions of different diameters, but upon one shaft, such pinions gearing
with the segments in the internally toothed wheel, thus it will follow that the larger
pinion will gear with the segment furthest from the centre of the wheel, and the
smaller pinion will gear with the segment nearest to the centre of the wheel,
consequently a fast and slow rotary motion will be imparted to the internally
toothed wheel.
An arrangement of wheels as above described, will be found of great advantage
in many descriptions of machinery where variable but continuous rotary speeds are
required and when my improved wheel is revolving at its slower speed, a great
power can be obtained, and this will be found an advantage in some description of
machines.
Dated this 1st day of April 1895.
TASKER & CROSSLEY,
Halifax, Patent Agents.
An Improved Arrangement and Construction of Wheels for Obtaining
a Continuous but Fast and Slow Rotary Motion.
I, THOMAS CONSTANTINE FAWCETT, of The Whitehouse Engineering Works,
Hunslet Road, Leeds, in the County of York, Engineer, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
My invention relates to a new construction and arrangement of wheels for the
purpose of obtaining a continuous but fast and slow rotary motion.
In carrying out my invention I make use of an internally toothed wheel, but
instead of the teeth being equi-distant from the centre or axis of the wheel, I form
segments of teeth at different distances from the centre of the said wheel. I also
employ two driving pinions of different diameters but upon one shaft, such pinions
gearing with the segments in the internally tocthed wheel, thus it will follow that
the larger pinion will gear with the segment furthest from the centre of the wheel,
and the smaller pinion will gear with the segment nearest to the centre of the

page_text: wheel, consequently a fast and slow rotary motion will be imparted to the internally
toothed wheel.
Such being the nature and object of our invention I will now make reference to
the accompanying sheet of drawings illustrative thereof, wherein
Fig. 1 is elevation of my improved gearing, and Fig. 2 is cross section of same
taken through line x, x, of Fig. 1.
A represents an internally toothed wheel, but in constructing it according to my
invention it is made with segments of teeth B and C of different diameters, or set
at different distances from the axis D of the said wheel.
It will be observed that the segment C is placed laterally or sideways to segment B.
I also employ two pinion wheels E and F fixed upon the same shaft G. It will
therefore be seen that as the internally toothed wheel is made to revolve, that at
one part of its revolution segment B will be in gear with pinion E and when at
another part of its revolution the segment C will be in gear with pinion F,
-consequently the speed of the wheel A will vary. The pinion wheels E and F are
the drivers.
The arrangement of wheels constructed as above described will be found of great
advantage in many descriptions of machinery where variable but continuous rotary
speeds are required, and when my improved wheel is revolving at its slower speed,
a greater power can be obtained, and this will be found an advantage in shearing
machines, brick pressing machines, planing machines; whilst the reduced speed
will be found advantageous in looms for weaving, especially with regard to carpet
looms where it is necessary for the loom to run slower when the pile wire is
-being introduced through the shed.
.
Having now particularly described and ascertained the nature of iny said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
An internally toothed wheel having teeth set at different diameters froin the axis,
in combination with driving pinions of two diameters, all arranged and operating
substantially as shewn in the drawings and described in the Specification.
Dated this 10th day of July 1895.
TASKER & CROSSLEY,
Halifax, Patent Agents.

page_text: Date of Application, 22nd Oct., 1894
Complete Specification Left, 20th July, 1895-Accepted, 24th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in Machines for Pressing Bricks and the like.
I, THOMAS CONSTANTINE FAWCETT, of The Whitehouse Engineering Works,
Hunslet Road, Leeds, in the County of York, Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention in brick pressing machines is intended to supersede those machines
worked by screw,
but at the same time I obtain the same results as a hand press
but at less expense.
My new machine comprises apparatus for pressing the brick, also for thick-
nessing the brick, and for stopping the machine self-actingly when a brick is
completed.
In carrying out my invention I employ toggle jointed levers for working the
upper pressing die, which toggle jointed levers are operated by connecting rod and
crank, from the main shaft of the machine, and in order to make the pressing more
effectually, I propose to work the toggles slightly past the dead centres after
assuming a vertical position. The main shaft is driven by an internal toothed
driving wheel by means of one or more pinions.
The teeth in this internal wheel may be made of two diameters gearing with
pinions of two diameters, so that a slower speed and greater power is imparted to
the machine during the action of pressing, whilst the remaining movements of the
machine will be quicker.
A cam is formed on the outer periphery of the internal toothed wheel, such cam
operating an arrangement of levers which on the completion of the pressing
operation, actuates a clutch-fork and withdraws a clutch from the driving pulley
so as to stop the machine to give the workman opportunity to remove the newly
pressed brick from the mould and to ensure another one. In order that the machine
may stop instantaneously one end of the lever operated by the cam on the internal
toothed wheel, comes into contact with a lug on the driving wheel which arrests
any further movement thereof. When restarting the machine the workman with-
draws the lever from the stop piece in doing which the clutch is reinstated with
the driving pulley and the machine rotates again. Instead of having cog teeth all
around the inside of the driving wheel, only a segment of cog teeth may be within
the said wheel, the remaining part being plain, to be driven by means of a friction
pulley, but on the side of the friction pulley a pinion wheel may be used, so
arranged that when the pressing operation is taking place the said pinion shall get
into gear with the toothed segment for the purpose of operating the toggles during
the pressing operation only.
This segment may be hinged at one end on a fulcrum, the opposite end being
free with a spring under it so as to permit the pinion to catch the teeth of the
segment when rotated.
For thicknessing a brick the bottom die rests upon one of a pair of compound
levers one of them being weighted.
There is also a cam bearing upon the upper of these compound levers so as to
counteract the action of the weighted lever and to ensure that the weighted lever
does not act upon the bottom die before its time I employ a weighted ratchet
segment into the teeth of which are one or two pawls such pawls working upon a
falcrum and to the opposite end of the pawls I attach a connecting rod which is
also attached to the ratchet segment, the opposite end of the said connecting rod

page_text: being slotted and working upon a pin or stud in another lever connected to the
bottom die or pressing plate, the arrangement being such, that the bottom die
cannot commence to rise until the upper die has got clear of the brick, by which
means bricks can be pressed to an equal thickness one after another in quick
succession.
Dated this. 20th dore of' Watcher 1804
TASKER & CROSSLEY,
Halifax, Patent Agents.
I, THOMAS CONSTANTINE. FAWCETT, of The Whitehouse Engineering Works,
Hunslet Road, Leeds, in the County of York, Engineer, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This invention in brick pressing machinery is intended to supersede those
machines worked by screw and operated by manual labour.
My new. machine comprises apparatus for, pressing the brick, also for thicknessing
the brick and for stopping the machine self-actingly when a, brick is completed.
In order that my improvements may be clearly understood, I will refer to the
accompanying sheets of drawings, wherein
Fig. 1 is, front elevation of a, brick-pressing machine.
Fig. 2 is side elevation.
Fig. 3, vertical section on line a, a, of Kig. 1.
Fig. 4 plap of self, acting, stopping mechanism.
Fig. 5 section, on line b, b,of Fig. 6.
Fig. 6 plan of same.
Fig. 7, shews the method of driving, the machine by a belt and without the self
acting stopping mechanism..
Referring to the drawings,, 1 represents the standards or framework of the
machine. 2 is the upper pressing plate made to rise up and down by toggle jointed,
levers. 3. actuated by crank 4 from the main shaft 5 of the machine. On the crank.
shaft 5 there is fixed an internal, toothed,driving wheel 6.
There are two segments of teeth in this wheel of two diameters from the centre
as shewn, in Fig. 2. There are also fixed on the top driving shaft. 7, two, cog.
wheels,8, and 9 of different diameters adapted to gear with the teeth in the internal.
wheel 6 so that a slower speed and greater. power is.imparted to the machine during
the action of brick, pressing, but the remaining movements of the machine will
be quicker because of the altered diameter, of the internal wheel and also, because
of the altered diameter of the driving cog 9..
In order to press a. brick effectually. I propose to work the toggle levers. 3.:
slightly past and beyond their dead, centres, after assuming a vertical, position.
The machine is set on by the workman who operates the handle. 10 and forces the
studs. 11, on plate. 12 on the driving shaft 7a groove, and, a key permitting the
sliding to be effected..
The studs 11 enter into holes in the driving pulley 13 which, runs, loose, upon
the shaft 7.
After the studs 11 enter the holes the shaft is made to revolve but by the
time the pressing operation has been effected, and the upper pressing plate. 2
withdrawn from the brick, a cam 14 on the outside of, the internal toothed wheel 6
enters into a slot 15 in one end of the slideable bar 16. whereby the said cam draws
this bar 16 sideways and withdraws. the studs 11 from the driving pulley 13
whereby the machine is stopped, but as the wheel 6 has a tendency to rebound and
run back, a lever 17 is employed carrying a pawl or catch 18 which, when the said

page_text: wheel 6 runs back the catch 18 comes into contact with the block 19 on the
periphery of wheel 6 whereby any further backward movement of the wheel is
brevented.
When the machine is set on. by moving the handle 10 the lever 17 and catch 18
connected to sliding bar 16 are drawn sideways, clear of the block 19 thus setting
free the internal toothed wheel 6.
From the above description, it is evident that the machine works intermittently
stopping at one part of its revolution to permit the newly pressed brick to be
removed and another one placed; into position after which, the, machine restarts
again, but the machine may have a continuous but slow motion imparted to it, as.
shewn in Fig. 7, where in this case the starting handle 10 and sliding part 12 are
dispensed with, but it will have two speeds through the medium of the wheel, 6.
For the purpose, of. ensuring that all bricks are of the same thickness whether
the quantity of clay in the mould be always, the same or not, I. employ means. for
indenting the brick such indentations being deeper or more shallow according to
the quantity of clay in the mould, but whatever depth the said indentations may
be, the exterior of the brick is the same thickness, and, this method and the means
I employ for this purpose is what I term the thicknessing apparatus..
Within the brick moulding die 20 is a rectangular pressing plate 21 and within
the rectangular plate is the indenting plate or piston 22 which has an upward
notion of its own independent- and apart from the rectangular bottom pressing
plate 21. This rectangular bottom pressing plate is attached to vertical rods 23
and to a cross bar 24 which cross bar is connected by other vertical bars 25 to a
second cross bar 26 passing through the upper pressing plate 2 such rectangular
bottom pressing plate rising and falling with the upper pressing plate actuated by
the crank 4 of the machine, therefore when the upper pressing plate begins to
ascend the bottom pressing plate also ascends and takes with it the newly pressed
brick 27 but when the pressing plate 21 is at the bottom of the die 20 the foot of
the spindle 28 of the indenting piston 22 is resting upon a lever 29 as shewn in
dotted lines Fig. 1. This lever 29 is hinged at 30 and the opposite end thereof is
resting upon the toe 31 of lever 32 hinged upon a fulcrum 33 and provided with a
weight 34 therefore when the bottom pressing plate 21 is at the bottom of the
die 20 with all the pressure of the upper plate 2 upon it, the weight 34 is prevented
from raising lever 29, and piston 28 by means of a holding cam 35 weighted at 36,
but by the time the upper pressing plate 2 commences to leave the brick, then the
cam 37 on driving wheel 6, comes into contact with lever arm 38 and causes the
eccentric or cam 35 to be removed off the toe of lever 29, whereupon the weight 34
is set at liberty and raises lever 29 and piston 28 causing the piston 22 to follow
after the brick and indent it.
Thus the brick is of equal thickness notwithstanding the varying quantity of
clay that is in the mould, the depth of the indent in the brick being more or less
according to the quantity of clay in the mould.
In order to enable the newly moulded brick to leave the moulding box with clear
sharp edges, I form valves 39 in the head of the piston 22 (see Figs. 5 and 6),
which valves will open by suction when the new brick is being removed and thus
atmospheric air will be admitted whereby the brick will freely leave the mould.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what
claim is-
Firstly. In a brick pressing machine having an upper pressing plate 2 operated
by toggle jointed levers 3 and crank 4, the combination therewith of a moulding
die 20 rectangular bottom pressing plate 21 and piston 22 arranged and operated
in the manner described.
Secondly. In a brick pressing machine the combination of operating lever 10
5 clutch 11 and driving pulley 13 for setting on the machine, all arranged as
described

page_text: Thirdly. In a brick pressing machine having operating lever 10 clutch 11 and
driving pulley 13 for setting on the machine in combination with cam 14 slotted
bar 16 employed for stopping the machine.
Fourthly. In'a brick pressing machine having operating lever 10 clutch 11 and
driving pulley 13 cam 14 slotted lever 16, in combination with lever 17 pawl 18
and block 19, all arranged as described..
$
Fifthly. In a brick pressing machine the combination therewith of an internal
toothed driving wheel 6 having 'two toothed segments therein of different diameters
and two cog driving wheels 8 and 9 for imparting different speeds to the said
press.
"
Sixthly. For thicknessing bricks in brick pressing machines having an upper
pressing plate 2 the combination therewith of a rectangular plate 21 and piston 22
the latter having a motion independent of the rectangular pressing plate and
operated by levers 29 and 32 and weighted cam lever 35 the latter being operated
by cam 37 and lever 38, all arranged and operated in the manner and for purposes
described.
Seventhly. The combination of valves 39 with the head of the piston 22
employed for purposes described.
Dated this 19th day of July 1895.
TASKER & CROSSLEY,
Halifax, Patent Agents.