Apparatus for Inserting or Removing Wheel Nave Bushes:
Year: 1885

page_text: Apparatus for Inserting or Removing Wheel Nave Bushes:
I JAMES RAE Manager Car & Carriage Works David St Glasgow do hereby
declare the nature of my invention for APPARATUS FOR INSERTING OR REMOVING
WHEEL NAVE BUSHES 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 a new and improved device or contrivance for taking
out and putting in boxes or bushes in carriage or cart wheels.
"
By the adoption of my Invention it will effect a great saving of labour; and,
the boxes or bushes aforesaid may be inserted or removed without any risk of
breaking them. Said apparatus consists of a heavy metal sole plate A A with a
hole in centre to allow of the bushes passing through as shewn in the drawing by
the dotted lines B B. Within say one inch of each end of the sole plate A. A a
hole is bored, indicated by dotted lines on the drawing at C C. A key way DD
being cut at right angles across the holes CC. A "jim crow or bent cramp EE
with plain ends is dropped into the bored holes C, C, with key way aforesaid at
right angles across said holes C C through which key way is passed a key, this
being the resistance to the screw. The wheel is laid on the metal block and a
mandrel or punch is put into the bore of the box and a shoulder to fit the outside
diameter. The top end of the mandrel a, a¹ (Figs 2 and 3) is made to fit a hole
bored in the end of the screw F, so that the greatest amount of power is got with
the least possible friction. This may be effected by the employment of an
arrangement of multiple jointed levers; the employment of hydraulic apparatus;
or, by the agency of steam or of compressed air. When I employ the first named
means I would propose to hinge the levers at the top end of the "jim crow or
bent cramp aforesaid, and in such manner as to ensure that when the mandrel is
put into place ready for forcing the box or bush into the wheel nave then on the
one or more multiple jointed levers aforesaid being worked by one long powerful
lever (or by an eccentric hinged on to the side of the "jim crow or bent cramp)
and by the action of pulling down said long powerful lever, upon which the latter
comes in contact with the one or more jointed levers aforesaid.-these latter are
now forced into a straight position and consequently effectually force the box or
bush into the wheel nave or hub, this being at the same time effected with great
rapidity safety and perfect immunity from risk of breakage; as also with greater
precision, and more, effectually than can be done by the use of a hammer, and
"
"

page_text: "
dispensing also with the necessity for wedges. When a hydraulic device is
employed for the purpose aforesaid, the same may consist of a small pump cylinder
and ram, the ram taking the place of the screw herein before mentioned. When
steam is employed for the purpose aforesaid, I should under such application place
a cylinder at the top of the "jim crow or bent cramp, with flexible steam tubing.
In turning on a pressure of steam through the flexible tubing, into the cylinder,
the piston would be forced down, and the end of the piston rod would then take
the place of the screw hereinbefore mentioned. When compressed air is adopted
for the purpose aforesaid, the arrangement of apparatus and the action thereof,
would be generally the same as that last described when steam is employed.
Having now particularly described and ascertained, the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
The apparatus for inserting or removing wheel nave bushes substantially as
herein set forth and described and shewn in the accompanying sheet of drawings.
Dated this 11th day of June 1885.
JAMES STEVENSON,
Grays Inn Chambers, 20, High Holborn, W.C.,
Agent for Applicant.