A NEW Spring Maker, both of Wolverhampton, in the County of Stafford. AND IMPROVED CONSTRUCTION OF SPRING
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by Thomas Nathan Crook and William
Frederick Rogers at the Office of the Commissioners of Patents on the 24th
November 1879.
THOMAS NATHAN CROOK, Mechanical Engineer, and William FREDERICK ROGERS,
"A NEW
Spring Maker, both of Wolverhampton, in the County of Stafford.
AND IMPROVED CONSTRUCTION OF SPRING."
We will first describe some
Our Invention is capable of several modifications.
modifications as applied for the spring of a locomotive, after which the application
of the Invention for springs generally will be sufficiently obvious. The springing
parts consist of steel plates, preferably circular, buckled or crimped radially, a
varying weight upon the said plates causing the buckles or crimps to yield and
thus produce a springing action. A pair of such plates are placed one on each side
of a metal disc, the two plates and disc being kept concentric by means of a rod
passing through their common axis. More than one plate can be placed on each
side of the disc to give the desired strength of spring, the plates being lesser in size
according to their nearness to the disc to allow of the free action of the plates.
We employ two sets of plates and discs for one spring, fixed forward and backward
of the axle by means of the rods passing through their axes passing also through
guides fixed to the framing of the locomotive. The axis of each set of plates and
disc is inclined downwards so as to meet at an angle upon the vertical centre line
of the axle. Each rod passing through a set of plates and disc has a shoulder to
bear against the plate nearest to the axle. A pressure rod passes from each
shoulder aforesaid along the inclined axes aforesaid, meeting one another, and also
the spring pin from the axle box on the vertical centre line of the axle. Upon
pressure coming upon the spring pin aforesaid the lower ends of the pressure rods
are forced up nearer to being in a straight line with each other, and thus pressure
is put upon the buckled plates aforesaid through the medium of the shoulders
aforesaid. The plates are forced against the guides aforesaid, and the rods passing
through the plates and discs slide in the guides as the plates are compressed. The
weight upon the spring may be adjusted by means of a screw box on the spring pin
from the axle box. Of course the spring may be under the axle, in which case the
ends of the pressure rods are pulled up by the spring pin from the axle box instead
of being pushed up. The axes of the sets of plates and discs may be horizontal

page_text: instead of being inclined, the ends of the pressure rods nearest the plates being guided
by hanging links, the thickness of the link being interposed between the ends of
the rods and the plates. One set of plates and disc instead of two may be used, if
desired, by compressing the said plates between the inner end of the pressure-rods
as they are forced towards being in line with each other.
It will be seen that by the arrangement of pressure rods inclined to one another
a considerable depression of the frame causes a small compression of the buckled
plates.
This Invention is of course applicable for the springs of vehicles generally, and
for other purposes for which springs are used.