An Improved Fore-carriage for Wheeled Vehicles.
Year: 1895

page_text: Date of Application, 7th Mar., 1895
Complete Specification Left, 7th Jan., 1896-Accepted, 8th Feb., 1898
PROVISIONAL SPECIFICATION.
An Improved Fore-carriage for Wheeled Vehicles.
1, THOMAS HARGREAVES BRIGG, of Thornton Road, Bradford, Yorkshire,
Engineer, do hereby declare the nature of the said invention to be as follows:-
This invention relates to an improved construction of forc-carriage or under-
gear for two-axled wheeled vehicles, the same being especially applicable for use
conjunctively with the improved means of connecting draught animals to such
vehicles described in the Specification accompanying my application for Letters
Patent No. 21938, filed on the 13th day of November, 1894; though the same
may also be applied to such vehicles as are connected in an ordinary manner with
draught animals.
.
The special object of the improved under-gear is to reduce the resistance of the
vehicle to traction, by rendering the fore and aft pairs of wheels less dependent on
the parallelism of the planes of the roadway over which they may at any time be
relatively travelling, so that each axle may be enabled to accommodate itself to
ordinary inerregularities of the roadway as it passes thereover and to overcome
obstacles thereon independently of and without affecting the other, thus avoiding
the transference of any strain on the fore-carriage due to the dipping of either end
of the fore-axle on an irregular roadway to the body of the vehicle, and of any
strain on the latter due to the dipping of either end of the aft-axle to the fore-
carriage, and materially lessening the resistance to traction.
To this end, the invention consists in constructing the under-gear in such a
manner (as hereinafter described) as that the parts thereof respectively connected
to the springs of the fore-axle and to the body of the vehicle can oscillate
relatively to each other on a horizontal axis disposed at right angles to the fore-
axle and intersecting the king-pin uniting the top and bottom wheel-plates, which
latter always maintain their respective parallel positions and so permit of turning
movements of the vehicle irrespective of the relative horizontality or angularity
of the fore and aft axles.
Each
In carrying the invention into effect, I construct the supporting part of the
undergenr in half parts which are bolted together transversely of the vehicle, and
secure the same to the springs supported by the fore-axle in a usual manner.
such part is made with a semicircular central part (of a greater radius than that of
the wheel plates the two are adapted to circumscribe) which is formed with a
sooket the two of which are aligned in a direction at right angles to the fore-
axle.
The under wheel-plate of the pair may be entire or sectoral and is connected by
arms to a central boss and is provided with external spigots adapted to engage
with the aforesaid sockets in the supporting part of the under-gear.
The upper wheel-plate rests on the lower one and is connected by arms to a
central boss and is provided with arms adapted to connect it to the body of the
vehicle.
The bosses of the two wheel-plates are connected together by a king-pin, spring
washer and set-nuts in a usual manner; leather or other suitable packing being
interposed between the wheel-plates to prevent metallic contact thereof.
The ends of the lateral extensions from the central part of the supporting frame
to the springs, may, with advantage, also be connected to such central part by
1

page_text: front and rear scroll-irons in vehicles intended to be connected in an ordinary
manner to draught animals.
In applying the improved under-gear conjunctively with the before referred to
improved means of connecting draught animals to such vehicles, I form such rear
connecting scroll irons in such a manner as also to be adapted to pivotally support
the rear ends of the shafts of the improved haulage gear described in my aforesaid
Specification, in planes exterior to those of the fore-carriage springs.
Dated this 2nd day of March 1895.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.
An Improved Fore-carriage for Wheeled Vehioles.
I, THOMAS HARGREAVES BRIGG, of Thornton Road, Bradford, Yorkshire,
Engineer, do hereby declare the nature of the said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement, that is to say:-
This invention relates to an improved construction of fore-carriage or under-
gear for iwo-axled wheeled vehicles, the same being especially applicable for use
conjunctively with the improved means of connecting draught animals to such
vehicles described in the Specification of Letters Patent No. 21938, dated the
13th day of November, 1894, granted to me; though the same may also be applied
to such vehicles as are connected in an ordinary manner with draught animals.
The special object of the improved under-gear is to reduce the resistance of the
vehicle to traction, by rendering the fore and aft pairs of wheels less dependent ou
the parallelism of the planes of the roadway over which they may at any time be
relatively travelling, so that each axle may be enabled to accommodate itself to
ordinary irregularities of the roadway as it passes thereover and to overcome
obstacles thereon independently of and without affecting the other, thus avoiding
the transference of any strain ou the fore-carriage (due to the dipping of either
end of the fore-axle on an irregular roadway) to the body of the vehicle, and of
any strain on the latter (due to the dipping of either end of the aft-axle) to the
fore-carriage, and materially lessening the resistance to traction.
To this end, the invention consists in constructing the under-gear in such n
manner (as hereinafter described) that the parts thereof respectively connected to
the springs of the fore-axle and to the body of the vehicle can oscillate relatively
to each other on a horizontal axis disposed at right angles to the fore-axle and
intersecting the king-pin uniting the top and bottom wheel plates, which latter
always maintain their respective parallel positions and so permit of turning move-
ments of the vehicle, irrespective of the relative horizontality or angularity of the
fore and aft axles.
The improved fore-carriage is illustrated on the accompanying drawings, in
which :-
Fig. 1, represents a sectional plan :
Fig. 2, represents a sido elevation :
Fig. 3, represents a sectional elevation on the line A-B Fig. 1:
Fig. 4, represents a front elevation; and
Fig. 5, represents a sectional elevation on the line C.-D. Fig. 1.
In carrying the invention into effect, I construct the supporting part a, of the
under-gear in half-parts which are bolted together as at a', transversely of the
vehicle, and I secure the saine in a usual mauner, as at 6!, to the usual springs b,
supported by the fore-axle, not shown. Each such half-part is made with a semi-
circular central part a', (of a greater radius than that of the under and upper

page_text: wheel plates o, c', the two are adapted to circumscribe,) which is formed with a
socket a', the two of which are aligned in a direction at right angles to the foro-
axle.
The under wheel-plate e, may be entire, or may be sectoral, as represented, and
is connected by arms (Fig. 1) to a central boss c³, and is provided with external
spigots c', adapted to engage with the aforesaid sockets a³, in the supporting part
of the under-gear.
The upper wheel plate c', rests on the lower one, and is connected by arms, to
a central boss c, and is provided with arms o', adapted to connect it to the body of
the vehicle.
1
The bosses c, d, of the two wheel-plates are connected together by a king-pin d,
spring washer, and set nuts, in a usual manner, leather or other suitable
packing, being interposed between the wheel-plates to prevent metallic contact
thereof.
The ends of the lateral extensions a, from the central part of the supporting
frame to the springs b, may, with advantage, also be connected to such central part
by front and rear scroll-irons e, in vehicles intended to. be connected in an ordinary
manner to draught animals.
In applying the improved under-gear conjunctively with the before referred to
improved means of connecting draught animals to such vehicles, 1 form such rear
connecting soroll-irons in such a manner, as at e', as also to be adapted to pivotally
Bupport the rear ends of the shafts of the improved haulage gear described in my
aforesaid Specification in planes laterally exterior to those of the fore-carriage
springs b, vide Fig. 1.
Having now particularly described and ascertained the nature of the said inven-
tion and in what mannor the same is to be performed, I declare that what I
claim is:-
Constructing the fore-carriage or under gear of two-axled wheeled vehicles in
such manner that the parts thereof respectively connected to the springs of the
fore axle and to the body of the vehicle can oscillate relatively to each other on a
horizontal axis disposed at right angles to the fore axle and intersecting the king
pin uniting the top and bottom wheel plates, as hereinbofore described.
Dated this 7th day of January 1896.
DAY, DAVIES & HUNT,
Chartered Patent Agents,
321, High Holborn, London, W.C., Agents for the Applicant.