IMPROVEMENTS IN SUSPENDING C-SPRING CARRIAGES
Year: 1884

page_text: I SAMUEL HART of 79 New Bond Street in the County of Middlesex, Conch
Builder, do hereby declare the nature of my invention for "IMPROVEMENTS IN
SUSPENDING C-SPRING CARRIAGES" to be as follows :-
My invention relates to improvements in suspending carriage bodies on
C springs and has for its object to dispense with the perch employed to connect
the fore and hind parts of the under carriago when C springs are used and thereby
to obtain a complete or all round locking of the fore wheels.
The invention consists in mounting the carriage body on a central longitudinal
horizontal axis at front and rear permitting of lateral oscillation of the carriage
body, these axes boing supported on the elliptic spring of the under carriage and
sustaining the principal part of its weight and the C springs being applied to take
up only lateral shocks and the oscillations of the body.
The fore axis is a horizontal bar fixed to the under side of the boot and situated
over the centre bolt of the wheel plate and is supported in bearings upon the bed
and horn bar constituting the top carriage that carries the wheel plate and rests
on the under part of the fore carriage which is provided with the usual elliptic
springs, the C springs being fixed on the top carriage and their suspending straps
attached to the sides of the boot.
The rear axis is an arın fixed to and projecting centrally from the rear of the
body and supported at its extremity upon the middle of a semi-elliptic cross spring
whose extremities are hung by shackles from the ordinary elliptic springs. The
C springs are fixed upon the elliptic springs, their suspending straps being attached
to arins projecting from the back of the body at each side and the elliptic springs
are connected at their fore extremity with the framing of the body.
Dated this 11th dofT.. 100A

page_text: I, SAMUEL BART, of 79, New Bond Street, in the County of Middlesex, Coach
Builder, do hereby declare the nature of the said invention for "IMPROVEMENTS
IN SUSPENDING Ċ SPRING CARRIAGES," 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 improvements in suspending carriage bodies on
C springs and has for its object to dispense with the underperch usually employed
to connect the fore and hind parts of the under carriage when C springs are used,
and thereby to obtain a complete or all round locking of the fore wheels.
I am aware that it has been before proposed to dispense with the perch, e:g: by
forming the C spring in one with the lower member of the elliptic spring but by
this arrangement the case of motion due to a complete double suspension (i,e,
C springs superposed upon elliptic undersprings) is not obtained or only to a very
imperfect extent whereas by my Invention none of the advantages of the ordinary
double suspension are sacrificed.
The Invention consists in mounting the carriage body on a central longitudinal
horizontal axis at front and rear permitting of lateral oscillation of the carriage
body, these axes being supported on the semi-elliptic and elliptic springs of the
under carriage and sustaining the principal part of its weight and the C springs
being applied to take up principally the lateral shocks and oscillation of the body.
Reference is to be had to the accompanying drawings forming part of this
specification, wherein Figure 1 represents a side elevation, figure 2, a plan, figure 3
a front elevation, and figure 4 a back elevation of the under carriage, showing my
improved mode of suspending the carriage body thereon. The same letters of
reference indicate the same parts in all the figures. a and fare the central
longitudinal horizontal axes at front and rear respectively upon which the carriage
body is principally supported so as to be capable of lateral oscillation independently
of the ordinary elliptic springs, and E and I are the C springs by which said
oscillations are restrained and taken up.
"top
The fore longitudinal axis a is a horizontal bar of round section fixed by means
of dead eyes a to the underside of the boot A and situated above the wheel plate B
its fore end being directly over the centre of the said wheel plate. This axis a is
supported in bearings b upon semi-elliptic cross springs b¹ bi resting on the "
bed"
c and
"horn bar" ci constituting the "top carriage" that carries the wheel
plate Bond rests on the bottom bed d of the fore carriage which is provided with
the usual elliptic springs D. The C springs E are fixed on the top bed c and horn
bar cand their suspending straps are attached to the boot A at the sides by means
of studs the tension of the straps being adjusted so as to regulate the proportion
of the load which they will support by winding the straps upon ratchet rollers et
mounted on the C springs E
The rear axis fis an arm bolted to and projecting centrally from the underside
and rear of the carriage body and its projecting portion, which is of round section,
is supported in bearings f¹ upon the middle of two semi-elliptic cross springs g
whose extremities rest on the hind beda g' carried by the ordinary elliptic
springs H. The C springs I are fixed upon the hind beds g¹ their suspending
straps being attached to springs 11 projecting from the back of the body Fat each
side. To prevent strains, when brakes are employed, tending to bend or break the
rear axis f, the elliptic springs H may be connected with the framing of the body
by straps.

page_text: I have described b, b¹, g, g, and I' as being springs which is preferable, but not
essential, as it will be obvious that they might be made rigid without interfering
with the action of the C springs.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, I declare that what
I claim is :-
==
1* A double (C and underspring) suspension for carriages wherein the carriage
body is mounted on a central longitudinal horizontal axis at front and rear so as to
be capable of lateral oscillation, said axes being supported upon the springs of the
undercarriage and the C springs being applied to restrain or take up the lateral
oscillations of the body substantially as herein described and shewn in the
drawings.
2nd The combination of central longitudinal horizontal axes and C springs
applied to support a carriage body in such manner as to permit of limited lateral
oscillation thereof substantially as herein specified, whatever may be the arrangement
of the elliptic or other undersprings of the undercarriage upon which said axes and
C springs are supported.
3rd The combination and arrangement of central longitudinal horizontal axes,
C springs, cross springs, elliptic springs, beds, and framework, applied to the
double suspension of a carriage body without the use of an underperch substantially
as herein described and shown in the drawings.
Dated this 9th day of October 1884.
SAMUEL HART.
By his Agents,
A. A. & W Clark,
Agents,
53, Chancery Lane.