ARRANGEMENT OF SPRINGS IN CARRIAGES
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Robert Croall at the Office
of the Commissioners of Patents on the 21st December 1883.
ROBERT CROALL of Edinburgh, Scotland, Carriage Builder
ARRANGEMENT OF SPRINGS IN CARRIAGES."
"AN IMPROVED
My invention has for its object the arrangement of the springs in carriages in
such a manner as to give increased ease of motion thereto and consists in adapting
and applying to the front part of carriages as well as to the back thereof three quarter
elliptic springs with cross spring and shackle couplings the upper halves or parts
of the elliptic springs being connected to the axle bed by means of bolts or otherwise
and the cross spring being fastened to the ends of the futchells or parts to which
the shafts or splinter bar are connected.
By this arrangement the carriage is hung on double sets of three quarter elliptic
springs and double cross springs with shackle couplings thereby obtaining an ease
of motion for the carriage equal to or greater than that obtained by the use of bow
or C springs without perch and with more economy and lightness.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Robert Croall in the Patent Office on the 19th June 1884.
ROBERT CROALL of Edinburgh Scotland Carriage Builder AN IMPROVED
ARRANGEMENT OF SPRINGS IN CARRIAGES"
"
My Invention has for its object the arrangement of the springs in carriages in
such a manner as to give increased ease of motion thereto and consists in adapting
and applying to the front part of carriages as well as to the back thereof as hitherto
used three-quarter elliptic springs with cross spring and shackle couplings the upper
halves or parts of the elliptic springs being connected to the axle bed by means of
D

page_text: bolts or otherwise and the cross spring being fastened to the back ends of the
futchells or parts to which the shafts or splinter bar are connected with the
addition of a sway bar of good diameter over and above the ordinary locking
wheel plate.
By this arrangement the carriage is hung on double sets of three-quarter elliptic
springs and double cross springs with shackle couplings thereby obtaining an ease
of motion for the carriage equal to or greater than that obtained by the use of bow
or C springs without perch and with more economy and lightness.
Having thus stated the nature of the said Invention I will proceed to describe it
more particularly by the aid of the accompanying Drawings in which are
represented an arrangement of springs above referred to.
Fig: 1 is a side view of a part of the framework of a carriage showing an
arrangement of the springs applied thereto.
Fig: 2 is a plan or horizontal view of the same.
AA are the three-quarter elliptic springs connected with the cross spring B by
means of shackles the upper halves or parts of the springs A being bolted or
otherwise fastened to the axle bed.
The three-quarter elliptic springs as shewn in the drawing are made of greater
length than usual and are secured to the elongated futchells E E while perfect
steadiness is attained by the introduction of the sway bar C C from under which
to the ends of the futchells is connected the cross spring stay D D.-The back
springs are also connected in a similar manner thereby obtaining a perfectly
balanced adjustment giving all the ease of C springs the lateral and longitudinal
motions being simultaneous.
The mode of application of the three-quarter elliptic and cross springs may
be varied from that shown in the drawings and described above so long as it is
adapted to secure the increased ease of motion of the carriage in the manner
described.
Having thus described the nature of the said Invention and in what manner
the same is to be performed I hereby declare that what I claim as of my
Invention is :-
=
The adaptation and application to the front part of carriages as well as to the
back part thereof of three-quarter elliptic springs and cross springs substantially as
and for the purpose described.
In witness whereof I the said Robert Croall have hereunto set my hand and
seal the eighteenth day of June in the year of our Lord One thousand eight
hundred and eighty four.
Witness, WILLIAM BURLEY
137 George Street
Chemist & Druggist
ROBERT CROALL (L.S.)