Improvements in Motor Wheels, or Mechanical Tractors.
Year: 1896

page_text: Date of Application, 1st Dec., 1896
Complete Specification Left. 1st Sept. 1897-Accented 1st Dec.
1897
PROVISIONAL SPECIFICATION.
Improvements in Motor Wheels, or Mechanical Tractors.
I, HENRY MIDDLETON, of:-3 Wellesley Villas, Wellington Street, Slough,
in the County of Buckingham; a Civil, Mechanical, and Electrical Engineer;
do hereby declare the nature of this invention to be as follows:-
This Invention consists of one, or two, wheels set in a frame in such fashion
and the frame being of such design that said wheel (or wheels) may be put in
rotation by a prime mover or motor of any suitable kind; and if the frame wherein
the wheel both rotates and turns to right, or left, as desired-be attached to a
vehicle; the latter can be drawn along by said motor wheel just as if the aforesaid
wheel was a horse, or other draught animal; being guided and directed with as
great ease and certainty.
The object of this invention is by no means to attempt a servile imitation of
draught animals; but to enable the possessors of carriages, carts, or other vehicles
to employ mechanical tractors which can be attached to the vehicles in common
use with in some cases no modification of said vehicles; and in others, very slight
changes in said conveyances. Further the said motor wheels may be made
sufficiently small or otherwise suitable to draw, or push, Tricycles; childrens'
carts; or almost all vehicles whatsoever; and finally when disengaged therefrom,
said motor wheel may be mounted on a frame in such fashion that it may be
employed to turn a small lathe; work a pump; or in fact act as a source of power
on any or every occasion whereby such motor is desirable. Having then thus
indicated the objects of my invention, the means whereby I attain the same will
now be set forth.
The wheel, or main wheel, or wheels (as I sometimes put two near together)
of my locomotive apparatus, is attached to a fork, of design similar to that used in
bicycles; the stem of the fork turns in a long cylindrical collar supporting a trans-
verse piece which however has continuations that are sometimes of sufficient
length to give the whole of this secondary frame the appearance of a second fork
wider than, and put over the primary fork, or wheel carrier. Of course ball bear-
ings are used for the axles or other turning parts when desirable. The ends of
the secondary fork or bars of the outer frame are constructed so that they may be
securely fastened to any wheeled vehicle possessing shafts; or, supplementary
shafts are added to the motor wheel when the vehicle it is to pull, or push, is with-
out said shafts. The main wheel is usually fastened securely to an axle carrying
two cranks at its extremities; and the crank rods pass upwards to two cylinders
in which the working fluid is either steam or gas. That is to say, the motor wheel
is driven by either a steam or oil engine, as desired. Leaving out then for the
present, consideration of peculiarities of construction which I propose introducing
for the purpose of adapting said motor wheel to carriages, or vehicles, or tricycles
even of peculiar shape; I will proceed to further describe the other portions of my
Invention which occur in what may be regarded as the standard, or chief type, of
my mechanical Tractors. Projecting from the lower end of the fork carrying said

page_text: wheel, and in the direction of the vehicle to which it may be supposed attached;
are two tubes, or rods, which running parallel with each other are usually united
together beyond the tyre of the wheel. To these tubes, or rods, another pair of
rods are attached not far from the hub and axle of the wheel; but instead of being
continued parallel to each other they diverge radially (in a horizontal plane) and
have their ends united by an are whose radius of-curvature is equal to the tube's,
or rod's, distance from the axle to the wheel. And further this tube may be con-
nected with the middle, or horseshoe portion, of that previously described; and
finally a third tube also bent into an arc of a circle (but lying in a vertical plane)
may unite these two tubes to the centre of the fork carrying the main wheel. The
union of the three tubes just spoken of is so contrived that it allows of the passage
of a grooved pulley wheel hetween the tube or girder which lies in a horizontal
plane, and the horeshoe end of the inner set of tubes. For, to the axle of the
aforesaid pulley-wheel the links, or eyed bands or straps; are attached by which the
vehicle is pulled forward. However, when the motor wheel is desired to push,
instead of pull, the grooved pulley wheel should be on the opposite side of the arc;
so I commonly arrange two pulley wheels in a bracket one before and the other
lehind said are; and to the bracket carrying them-i.e. the pulley wheels-attach
the vehicle I would have drawn, or pushed.
to
When my mechanical Tractors is actuated by steam, I commonly support the
two cylinders by the legs of the inner fork carrying the main wheel-there being
one cylinder on each leg-and the steam and exhaust pipes appertaining to the
same, are usually passed up the interior of the hollow vertical axle, pivot or
trunnion about which the wheel turns to right, or left. Of course the steam pipe
passes through one or more stuffing boxes and glands so as to enable the connection
of the pipe from the hoiler to be fluid tight in spite of the motion of the lower
portion of the pipe whose upper part is generally fastened to the outer fork, and
then passes hackwards-(or forwards, according as the motor wheel is placed before
or behind the cart)--to the hoiler. Most commonly I make the "boiler" of thin
tube of small diameter and either curled into a helix or in the shape of some of my
tubular boilers described in Specifications Nos. 13,431 of 1889 (see Fig. 5) and
15,920 of 1890 (see Figs. 8 & 13). And generally this boiler' is placed
between the motor wheel and the cart, being supported on two girders
which span the space between the shafts and by which letter the girdlers
are sustained.. A very convenient way of heating the boiler is
employ an oil holder or vessel which has an air compressing pump attached in
such fashion that by forcing air aoove the oil it can be driven through a set of
burners, and so contrived that when at a sufficiently high temperature they vaporize
the stream of oil which passes to them from the oil holder, and the vaporized oil is
then burnt on escaping through minute apertures: some of these apertures being
at under the vaporizing tahes spoken of already, and some under others of similar
function put at any convenient place under, or above, or around, said tubular
hoiler, but most usually all these vaporizing tubes are within the casing, which
encloses the whole tubular boiler. In order however to secure as perfect combus-
tion with as little smoke as possible on burning the oil, I frequently more or less
surround the jets, nozzles or holes out of which the oil vapour escapes, by such
shaped mantles, coverings, or envelopes of metal as to cause air to le mixed in
sufficient quantity to secure the complete combustion aimed at. As a consider-
able mass of water must needs be carried in most cases both for the purpose of com-
pleting the condensation of the exhaust steam and of supplving the place of that
which cannot be condensed but is wasted by being allowed to escape into the air,
I attach two water tanks to the outer framing on each side of the motor wheel.
These tanks may also have thin tubes for condensing the steam which the air con-
densers (generally suspended benenath the hody of the car) were insufficient to
reduce to the liquid state.
Sometimes indeed I utilize some of the heat of the exhaust steam in this fashion.
Instead of passing the exhaust into the air condensers, or water, condensers; I

page_text: allow it to enter water in which some suitable chemical is dissolved (like common
salt, or acetate of soda, or better caustic soda or caustic potash)-for such has the
property of allowing the temperature of the solution to increase to considerably
over 212° F while the steam which rises therefrom is at the atmospheric pressure,
and (practically) the temperature stated. Thus if in such a fluid heater, a tubular
boiler is placed containing alcohol, ether, chloride of methyl, or other easily
vaporizable substance; the vapour of said substance may be used to
drive an engine (and the exhaust either condensed, burnt, or wasted)
provided a suitable substance be chosen. Well then; when this plan is
adopted there need only be one cylinder working with the "steam" of the easily
vaporizable fluid chosen, the exhaust of the steam engine-after leaving the fluid
bath-being condensed as before as far as practicable, or wasted, if desired, and
the exhaust of the easily, vaporizable liquid being burnt or condensed as far as
possible; according to the particular cycle of operations which it is desired to
carry out in any particular case.
In the case of a small motor wheel used to propel a Tricycle, I usually fit such
with a pair of supplementary shafts which can be attached to the steering axle, or
front tube of the ordinary type of machine, or sometimes, to the back bone thereof
it being supposed that the ordinary front wheel of the Tricycle has previously been
detached; but this is by no means necessary as it may be simply raised from the
ground so that the tricycle is supported on its back wheels and the motor wheel
to which it is attached by the supplementary shafts previously mentioned.
ever-in all these arrangements ine methods of steering the motor wheel are as
follows, to wit, I employ either a sort of handle bar to project over the top of the
inside fork carrying the main wheel with its ends extending downwards to any
convenient length so as to carry two chains; there being one attached to each end
of said arm, and further these chains then go round the rim of a wheel mounted in
the car conveying the passengers. Moreover this wheel can be manipulated very
much as the steering wheel on a small ship; only in this case the axle of said
steering wheel is vertical, instead of horizontal. Or instead of having a handle
bar, I have two rods projecting any convenient distance from the sides of the inner
wheel carrying fork, and to the ends of these rods (or tubes) I attach the chain (or
band) which passes round the periphery of the steering wheel aforementioned.
Where an oil engine is used instead of a steam one the general arrangement of
the corresponding parts is entirely similar to that just described. The cylinders
are as before on each side of the steering fork or primary fork, the main wheel acts
as a fly wheel while the oil holder is generally placed between the motor wheel
and the car. In such event I generally force the oil from the holder into the
mixing chamber by a compressing pump which fills the upper part of the oil holder
with air and the oil jet draws in enough air for its combustion as it enters tha
mixing chamber: either by spraying, or by injector method.
There is however another plan I sometimes employ, to wit; I take advantage of
the excessively high temperature of the exhaust of the oil cylinder to raise a more
volatile fluid (as water or methylated spirits etc etc) to its steaming point or boiling
point under the necessary pressure for engine work. That is to say I drive my
inain wheel by a motor made out of an oil engine and steam engine combined. Or
in other words I put one cylinder of an oil engine on one side of the steering fork
and on the other I put a steam engine cylinder. The exhaust' from the oil
engine I pass into a vessel containing a tubular boiler of any convenient shape
and after communicating its heat to a greater or less extent thereto I let the exhaust
escape in the air. While the contents of said tubular boiler after being converted
into steam are caused to enter the cylinder of the engine which thus works by steam
(f water or other liquid) and as the oil and steam engine are both connected with
the same axle the machine can be made to have no dead points if desired. Further;
a supplementary lamp can be used to start the process. That is to say such lamp
may be used to heat the fluid in the steam boiler, and after this steam has put its
attached engine in motion, the oil engine is started and its exhaust keeps up the

page_text: steam pressure in the tube boiler of the steam engine in the manner previously
stated. If methylated spirits or other combustible working sultance" he
employed for the steam engine its exhaust may be burnt under its own boiler or
that of a donkey pump. Or again as the latent heat of the steam from alcohol is
only about ;47 of that of the steam of water it may be condensed with more ease
by the air condenser and those in the water holders or tanks attached to the outer
framing of the main wheel. Or, again, if water be used as "the working sub-
stance"; the steam in the water jacket of the oil cylinders may have its tempera-
ture sufficiently raised to allow such steam to be employed in conjunction with
that generated in the tube boiler attached to the steam cylinder.
Apparently only two further points need be mentioned in this Provisional
Specification; and these are, the employment of a double main wheel in the place
of a single one and the new steam cut off I occasionally employ.
The necessity then for the double wheel is chiefly to form a means of propelling
bicycles by my mechanical tractor, which then has its two wheels sufficiently
separated to secure requisite stability but are usually without a turning trunnion
or pivot. For in this case a single frame encloses the wheels and to this frame are
attached shafts which may be fastened to the framing of a bicycle whose rear
wheel is then slightly lifted from the ground and which is steered by the front
wheel as usual; the remaining changes being obvious, no more prolix description
appears necessary. While with regard to the valve motion or new steam cut off,
I may briefly say it consists of attaching to the valve spindle of an ordinary slide
valve a bent lever whose further end has a pin sliding or rolling in a groove cut
in the shape of a closed curve in a sort of table which is made to travel back and
forth by being attached to the piston rod of the steam cylinder; and this closed
curve is given such shape as to secure the required degree of cut off.
reversing is desired two tables with two bent levers must be employed, and one
or other is put in gear by a sliding clutch which thus connects one or other with
the axle on which they turn. But for purposes o small motor cars reversal is
Lardly necessary, and large ones had better have their cylinders fitted with an
ordinary link motion: or some of the many more complicated cut off valve systems
in rore or less common use nowadays.
Dated this 1st day of December 1896
When
COMPLETE SPECIFICATION.
Improvements in Motor Wheels, or Mechanical Tractors.
I, HENRY MIDDLETON of 3 Wellesley Villas, Wellington Street Slough; in the
County of Buckingham a Civil, Mechanical and Electrical Engineer do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This Invention consists of one or two wheels set in a frame in such fashion, &
of such design, that said wheel, or wheels, may be put in rotation by a prime mover,
or motor of any suitable kind: and if the frame wherein the wheel both rotates
& turns to right or left as desired-be attached to a vehicle; the latter can be
drawn along by said motor wheel just as if the aforesaid wheel was a horse or other
draught animal; being guided and directed with as great ease and certainty.
The object of this invention, is by no means to attempt a servile imitation of
draught animals: but to enable the possessors of carriages, carts, or other vehicles
to employ mechanical tractors which can be attached to the vehicles in common
use, with, in some cases no modification of said vehicles; and in others,

page_text: very slight changes in said conveyances. Further, the said motor wheels
may be
made sufficiently small or otherwise suitable to draw, or push
Tricycles, Childrens' carts; or almost all vehicles whatsoever; and finally, when
disengaged therefrom, said motor wheel may be mounted on a frame in such
fashion, that it may be employed to turn a small lathe, work a pump, or in fact
act as a source of power on any or every occasion whereby such motor is desirable.
Having then thus indicated the objects of my invention, the means whereby I
attain the same will now be set forth.
The wheel or wheels, as I sometimes use two near together-or main wheel of my
locomotive apparatus is attached to a fork of design somewhat similar to that
employed in bicycles;-the stem of the fork turns in a long cylindrical collar
supporting a transverse piece which however has generally continuations that give
to the whole of the secondary frame the appearance of an arch, or second fork,
wider than, and put over the primary fork or wheel carrier. Of course ball bear
ings are used for the axles or other turning parts when desirable. The ends or
other convenient parts of the secondary fork, or bar, of the outer frame are con-
structed so that they may be securely fastened to any wheeled vehicle possessing
shafts. Or supplementary shafts are added to the motor wheel when the vehicle
it is to pull, or push, is without said shafts. The main wheel is usually fastened
securely to an axle carrying two cranks at its extremities; and the crank rods
(or "connecting rods ") pass upwards to the two cylinders in which the working
fluid is either steam or gas. That is to say the motor wheel is turned by a steam
or oil engine as desired. Attached to the lower ends of the fork carrying the main
wheel, are two girders, of tubular or other convenient shape: these girders, or
framing pieces; are usually placed horizontally and parallel to each other and
united before and behind the main wheel: or they may enclose only half the wheel
between them and when the latter is the case the back half of the wheel is
ciaonly the enclosed portion. This however is purely a matter of convenience,
and generally governed by the position of the "Boiler," or steam generator.
Perhaps the most convenient plan is to have the horizontal framing spoken of,
enclose the whole wheel; and connect both the front and back portions of the hori-
zontal tube or frame system to the outer framing by means of the arcs and wheels
to he now described. First though it must be premisad that the size of the main
wheel or height. (from the ground of) the shafts of the vehicle to be pulled, or pushed,
may be such that an arched piece, or fork, rather than a bar, is employed to support
said shafts; in this event the outer fork or frame, is made very similar to the
inner one: and another horizontal frame is fastened to the lower extremities of
the arched piece, or outer fork. If the arched piece has its ends pretty widely
separated, the outer frame may have parallel sides: but if the outer frame is rather
narrow, the sides must diverge from the ends of the fork in order that sufficient
room be afforded for the main wheel to turn between them. The ends of these sides
are united by arcs over which grooved wheels run. Ou the grooved wheels may be
attached to the outer horizontal frame, and the ends of the inner horizontal frame
may be arched: the radius of the arcs being in all cases the distance therefrom to
the centre of the main wheel. Generally, one, or two, arched girders either
tubular or T shaped connect the transverse top of the fork (outer fork) with the
ends of the outer horizontal frame: while a method of diagonal staying is used to
keep the inner horizontal frame at right angles to the inner fork. Further, the
inner of the ends-to wit, that nearest the vehicle of the outer horizontal frame
is usually attached to the shafta as well as the sides of the outer fork, or support-
ing bar. Lastly-in this connection-it' will be seen that the main wheel turns
from side to side in the outer frame, which affords a further very convenient
support for the boiler-when steam is used-which boiler may be put either
between the vehicle and main wheel or outside of main wheel.
When my Mechanical Tractor is actuated by steam, I commonly support. the two
cylinders of the engine by attaching them to the legs of the inner fork carrying the
main wheel: there being one cylinder on each leg; the steam pipe from the boiler

page_text: being commonly attached to a vertical pipe which itself encloses the hollow axle
about which the main wheel turns: and attached to the lower end of the hollow
axle are two steam pipes whence, or through which the "live" steam flows to the
steam chests and cylinders. In similar fashion the exhaust steam may be conveyed
through the turning pivot by a set of diaphragms passing axially up said pipe;
but it is apparently better to make use of flexible tubing" metallic" or other-
wise to form the passage way for the exhaust steam to pass between the interior
turning frame and the exterior; and thence to the condensers.
an oil
Most commonly I make the boiler "of thin tube of small diameter. This
tube may be either coiled into one or more helices; or worked into the shape of
some of my tubular Boilers described in my earlier Specifications (For example
Specifications Nos 13431 of 1889; 15920 of 1890 and 21,885 of 1891. Sometimes
the boiler is placed between the motor wheel and the cart: but perhaps more pre-
ferably outside of the motor wheel and furthest from the cart, being supported
on two girders which are attached to the general outer framing within which the
wheel turns. A very convenient way of heating the boiler is to employ
holder or vessel which has an air compressing pump attached in such fashion that
by forcing air above the oil it can be driven through some tubes heated by an
ordinary lamp burner, and so continued that when at a sufficiently high tem-
perature they vaporize the stream of oil which passes to them from the oil holder,
and the vaporized oil is then burnt on escaping through minute apertures. Some
of these apertures being put under the vaporizing tubes spoken of already, and
some under others of similar function put at any convenient place under, or above,
or around said tubular boiler, but most usually these vaporizing tubes are within
the casing which encloses the whole tubular boiler. In order however to secure
as perfect combustion with as little smoke as possible on burning the oil, I
frequently more or less surround the jets, nozzles or holes out of which the oil
vapour escapes, by such shaped mantles, coverings, or envelopes of metal as to
cause air to be mixed in sufficient quantity to secure the complete combustion
aimed at. As a considerable mass of water must needs be carried in most cases,
both for the purpose of completing the condensation of the exhaust steam and of
supplying the place of that which cannot be condensed but is wasted by being
allowed to escape into the air, I attach two water tanks to the outer framing on
each side of the motor wheel. These tanks are either divided by partitions or
formed of separate sets of tubes with the exhaust-steam tube running through
them. Further these tanks may also have thin tubes for condensing the steam
which the air condensers (generally suspend beneath the body of the car) were
insufficient to reduce to the liquid state.
In the case of a small motor wheel used to propel a Tricycle, I usually fit such
with a pair of supplementary shafts which can be attached to the steering axle or
front tube of the ordinary type of machine: or sometimes to the back bone thereof,
it being supposed that the ordinary front wheel of the Tricycle has previously been
detached; but this is by no means necessary as it may be simply raised from the
ground so that the tricycle is supported on its hack wheels and the motor wheel
to which it is attached by the supplementary shafts previously mentioned. How-
ever, in all these arrangements the methods of steering the motor wheel are as
follows, to wit, I employ either a sort of handle bar to project over the top of the
inside fork carrying the main wheel with its ends extending downwards to any
convenient length so as to carry two chains there being one attached to each end
of said arm, and further these chains then go round the rim of a wheel mounted
in the car conveying the passengers. Moreover this wheel can be manipulated
very much as the steering wheel on a small ship, only in this case the axle of said
steering wheel is vertical, instead of horizontal. Or instead of having a handle
bar, I have two rods projecting any convenient distance outwards from the sides
of the inner wheel-carrying-fork, and to the ends of these rods (or tubes) I attach
the chain or band) which passes round the periphery of the steering wheel afore-
mentioned.

page_text: Where an oil engine is used instead of a steam one the general arrangement of
the corresponding parts is entirely similar to that just described. The cylinders
are as before on each side of the steering fork or primary fork, the main wheel'acts"
as a fly wheel while the oil holder generally placed between the motor wheel and
the car. In such event I generally force the oil from the holder into the mixing
chamber by a compressing pump which fills the upper part of the oil holder with
air and the oil jet draws in enough air for its combustion as it enters the mixing
chamber, either by spraying or by injector method.
There is however another plan I sometimes employ, to wit: I take advantago
of the excessively high temperature of the exhaust of the oil cylinder to raise a
more volatile fluid (as water or methylated spirits etc. etc.) to its steaming point or
boiling point under the necessary pressure for engine work. That is to say I
drive my main wheel by a motor made out of an oil engine and steam engine com-
bined. Or in other words I put one cylinder of an oil engine on one side of the
steering fork and on the other I put a steam engine cylinder. The 'exhaust '
from the oil engine I pass into a vessel containing a tubular boiler of any con-
venient shape and after communicating its heat to a greater or less extent
thereto I let the exhaust escape in the air while the contents of said tubular boiler
after being converted into steam are caused to enter the cylinder of the engine,
which thus works by steam (of water or other liquid) and as the oil & steam engine
are both connected with the same axle, the machine can be made to have no dead
points if desired.
DESCRIPTION OF THE DRAWINGS..
Fig 1 is a side view of the Motor Wheek; in which w is the main wheel;"
b the boiler; the condenser; and S the steam pipe furnishing the 'live' steam
to the cylinders under the covering case d. is the reversing lover and h is the
handle for turning the steam off & on. t is the pipe for conveying the exhaust
steam to the condenser. u is the hand steering wheel & g is the sprocket wheel
over which the steering chain passes. While a represents the outer covering
of the heating arrangement.
€1
Fig. 2. is a side view of the motor wheel with the outer case d (see Fig. 1.)
and condensere (see Fig. 1.) removed in order to show the machinery for pro
pelling it. e is one of the two steam cylinders. r the arc of the reversing gear
Imade usually after the principle of Stephenson's link motion]. r, & r. are two
toothed sectors attached to the link motion as shown: r, being a toothed rack
connecting the sectors; it being understood that these are similar sectors & a
rack on the other side of the wheel moving the link motion of the other cylinder
(see Fig. 3). As the sector r, is fastened to a rod or axle passing behind the
main-wheel and carrying another sector r, (see Fig. 4) corresponding to r: it
follows that r, & r, turn together and as the outer ends of the racks rar (see
Fig. 4) are united by a curved and slotted bar, if any part of this bar is moved
back & forth the whole rack system will move parallel to itself back and forth:
and when a ridge or alot is made on the aforesaid har it may be set in any given
position by connecting it with the reversing lever apparatus by, means of two
little rollers (or a pin if the slot method is preferred) placed on opposite sides of
the said ridge; it.being of course understood that the rollers (or pin) are carried
by a sliding rack z whose teeth engage in those of the sector q which is itself
attached to & turned by the reversing lever 1, which is held in position by the
notches in the are 1, all of which latter mechanism is of course supported by
suitable framing. In this Figure as in Fig. 1. the heater is lettered a.
Fig. 3. is a front view of the motor wheel the boiler being removed.
are the two steam cylinders: with the main wheel w between them. k and k₁
are two arched ribs strengthening & staying the outer frame & also carrying
the case d (see Fig. 1.). 11, is the link motion. S a section of the steam pipe,
which, after entering the long hollow axle y with stuffing box passes through the
forked pipe to the cylinders. j & jare two framing pieces connecting the upper
cross bar to the two side pieces of the outer frame.
e and e

page_text: Fig. 4 is a view looking downwards on the Motor Wheel. e and are the
steam cylinders. the turning plate. the main wheel. i the steering
chain. m and m, are the positions which the shafts would occupy. f & f, are
two sectors attached to the inner frame which slide through bearing pieces
attached to the outer frame; ball bearings may of course be used to diminish
friction. It may be well to add that the steering chain is attached to sectors or
arms, verticaly beneath & concealed by these sectors: the sectors being supposed
to have teeth like sprocket wheels u, u₁, and u, being three sprocket wheels
carrying the steering chain to the centre of the last of which is attached the
steering axle & wheel. h is the handle for turning on the steam.
the toothed sectors for working the reversing gear; r being the toothed racks
T2
T₁₂ & x & xq
used for the purpose aforesaid. is the are attached to the racks r&r: the
said are being controlled by the rack carrying sliding bar z attached to the
reversing lever I by means of the toothed arc z. Lastly, to the interior frame
is attached a strong piece v with a raised edge which can be moved between the
roller systems P₁ Po, &c. as shown. it being understood that the frames of the
rollers are attached to the outer frame by means of the spandril shaped piece
cut concentric to the piece v.
CLAIMS.
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:
1. A Motor Wheel or Mechanical Tractor consisting of one or two wheels work-
ing in framing and driven by a Steam Engine substantially as described and in
and in manner I have invented and explained in this Specification.
2. A Motor Wheel or Mechanical Tractor consisting of one or two wheels
working in framing and driven by an Oil or Gas Engine substantially as described
and in manner I have invented and explained in this Specification
3. A Motor Wheel or Mechanical Tractor consisting of one or two wheels
working in framing and driven by a motor consisting of a combination of a
Steam and Oil Engine substantially as described and in manner I have invented
and explained in this Specification.
4. The Motor Wheel or Mechanical Tractor substantially as described and
represented in the drawings Figs. 1, 2, 3, 4 etc.
5. The method of working the reversing gear of the link motion however the
main wheel is turned from side to side.
6. The Steering gear and chain wheel substantially as described and repre-
sented in
7. The method of working an Oil Engine with oil under pressure substantially
as described.
Doted thin 1
3008