An Improved Fore Carriage suitable for a Portable Chaff Engine or other like Machine or Vehicle.
Year: 1889

page_text: Date of Application, 6th Mar., 1889
Complete Specification Left, 2nd Dec., 1889-Accepted, 4th Jan., 18:0
PROVISIONAL SPECIFICATION.
An Improved Fore Carriage suitable for a Portable Chaff Engine
or other like Machine or Vehicle.
I, ROBERT MAYNARD of Whittlesford near Cambridge, Engineer do hereby declare
the nature of.this invention to be as follows:-
This Invention has for its object to allow the front wheels of a chaff engine or
other like machine or vehicle to lock round freely thus avoiding strain and injury
thereto and enabling it to be turned more conveniently and in a smaller radius.
Such improved fore carriage consists of two side plates fastened to the body of
the machine or vehicle in any convenient manner and a cross plate carrying a
central lever which is pivotted thereto in such a manner that it works freely to and
fro-Suitable lugs are cast or otherwise formed on the side plates while the ends of
the cross plate project over such side plates. Such projecting ends and lugs together
form sockets for two stems which are fitted therein. The lower ends of these stems
are connected to two forks wherein the front wheels are mounted in a somewhat
similar manner to the steering wheel of a bicycle. The upper ends of such stems
form axes for two cranks which are mounted thereon and are pivotted at their outer
ends to two connecting rods. The inner ends of these connecting rods are pivetted
to the before mentioned central lever at different points one on its upper and the
other on its under surface-the pivot head in the latter one forming a stop which
comes in contact with the cross plate when the machine or vehicle is being turned and
thus controls and regulates the action of the connecting rods.
By this improved construction of fore carriage a differential action is obtained
in the front wheels which allows the machine or vehicle to be easily turned without.
strain or injury to new of its warts
COMPLETE SPECIFICATION.
An Improved Fore Carriage suitable for a Portable Chaff Engine
or other like Machine or Vehicle.
I ROBERT MAYNARD of Whittlesford near Cambridge, 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 has for its object to allow the front wheels of a chaff engine or
other like machine or vehicle (such as a road wagon or any other vehicle travelling
on four wheels) to lock round freely without sliding thus avoiding strain and injury
thereto and enabling it to be turned more conveniently and in a smaller radius.
The letters of reference occurring in the following description of my invention refer
to corresponding letters of reference on the accompanying drawings in the several
figures whereof similar letters of reference indicate corresponding parts-Fig. 1
is a plan Fig. 2 a side elevation and Fig. 3 a front elevation of one of my im-
proved fore carriages and Fig. 4 is a plan view thereof shewing the wheels in position
for turning a corner-The dotted lines in this figure indicate the position of the
wheels when turned the reverse way.
Such improved fore carriage consists of a frame formed of two side plates a and a
cross plate b the side plates being screwed or otherwise fastened to the framework of
the machine or vehicle while the cross plate carries a central lever c pivotted thereto
by a pivot c¹ in such a manner that it works freely to and fro-To this central lever

page_text: suitable shafts or a handle may be jointed or otherwise fastened if desired-Suitable
lugs d are cast or otherwise formed on the side plates while the ends &¹ of the
cross plate project over such side plates-Such projecting ends and lugs together
form sockets for two stems e which are fitted therein--The lower ends of these stems
are connected to two forks wherein the front wheels are mounted in a somewhat
similar manner to the steering wheel of a bicycle whilst the upper ends of such stems
form axes for two cranks which are mounted thereon and are pivotted at their outer
ends to two connecting rods -The inner ends of these connecting rods are pivotted
to the before mentioned central lever at different points one on its upper and the other
on its under surface-the pivot head in the under rod forming a stop which comes in
contact with the cross plate when the machine or vehicle is being turned and thus
controls and regulates the action of the connecting rodsk indicates a portion of the
framework of the vehicle to which the fore carriage is fitted.
The main feature of my invention consists in dispensing with the single continuous
axle hitherto in use and in substituting therefor two connecting rods pivoted at
different points to a central lever and otherwise arranged and fitted substantially as
herein before described and shewn the advantage of such improved construction and
arrangement being that thereby a differential action is imparted to the front. wheels
which allows the machine or vehicle to be easily turned within the radius of its
own length or nearly so without either wheel being forced to slide thus avoiding strain
or injury to any of its parts.
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 I
claim is
-
1° The improved construction of fore carriage for a chaff engine or other road vehicle
travelling on four wheels consisting of a frame fitted with central lever connecting
rods, cranks, stems and forks all constructed arranged combined and fitted substantially
as herein before described and shewn.
2° Fitting the fore carriage of a chaff engine or other road vehicle travelling on
four wheels with two connecting rods pivotted to a central lever all substantially as
hereinbefore described and shown.
30 Fitting the fore carriage of a chaff engine or other road vehicle travelling on
four wheels with two forks wherein the front wheels are mounted so that they can
lock round at any angle which the vehicle may take without strain or sliding all sub-
stantially as herein before described and shewn.
Dated this 50th dox of Vavambar 1080
ELT & Co.
33, Southampton Buildings, Holborn, London, Agents for the Applicant.