Improved Apparatus to Facilitate the withdrawing of Keys, Cottars, Pins, Bolts, Rivets, or the like from Pulleys, Shafts, and other parts of Machinery or Structures."
Year: 1897

page_text: Date of Application, 25th Jan., 1897
Complete Specification Left, 25th Oct., 1897-Accepted, 1st Jan., 1898
PROVISIONAL SPECIFICATION.
"Improved Apparatus to Facilitate the withdrawing of Keys,
Cottars, Pins, Bolts, Rivets, or the like from Pulleys, Shafts,
and other parts of Machinery or Structures."
We, THOMAS COLE and WILLIAM LAWES COLE both of St. Anns Road, Burdett
Road, Bow, and JAMES PEARSON BUSH, of 12 Palm Street, Bow, London. Engineers.
do hereby declare the nature of this invention to be as follows:-
This invention relates to improved apparatus to facilitate the withdrawing of
keys, cottars, pins, bolts, rivets, or the like from pulleys, shafts, and other parts
of Machinery or structures.
To carry this invention into practice, we provide a kind of bridge with screw
threaded holes near the greatest breadth for the reception of screw bolts or rods.
The central under part of the bridge is slotted and has inclined side cheeks.
The slot serves to receive a couple of gripping jaws which are preferably hinged
at the back, the end inner faces being chequered for firmly engaging the project-
ing end of a key, cottar, pin, bolt, rivet, or the like over which the appliance can
be fitted.
In practice, supposing a key has to be withdrawn from a pulley and shaft
between which it is secured. The two grip jaws are laid over its projecting end
and pressed into contact, the two screw rods are next adjusted to bear against the
boss of the pulley, this tightens the grip of the jaws on the key, so that by con-
tinuing to rotate the screw rods, the key is gradually loosened for withdrawal.
The invention is specially applicable and the shape of the gripping part of the
jaws could vary to suit the article to be acted upon, and should the apparatus be
made within certain limits for the use of Factory hands and Machinists, the jaws
may form part of or be connected with the bridge in order to be handy when
required.
Instead of the screws being fitted for withdrawal, hydraulic or some other
mechanical devices can be used.
it
COMPLETE SPECIFICATION.
Improved Apparatus to Facilitate the Withdrawing of Keys,
Cottars, Pins, Bolts, Rivets, or the like from Pulleys, Shafts,
and other parts of Machinery or Structures."
We, THOMAS COLE and WILLIAM LAWES COLE both of St. Anns Road, Burdett
Road, Bow, and JAMES PEARSON BUSH, of 12 Palm Street, Bow, London. Engineers.

page_text: 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 relates to improved apparatus to facilitate the withdrawing of
keys, cottars, pins, bolts, rivets, or the like from pulleys, shafts, and other parts
of Machinery or Structures.
To carry this invention into practice and as shown on the annexed drawings,
Figures 1, 2, and 3, we provide a kind of bridge A with screw threaded holes near
the greatest breadth for the reception of screw bolts or screw threaded rods B, B.
The central under part of the bridge is slotted and has inclined side cheeks.
The slot serves to receive. a couple of gripping jaws C, C, which are linked or
hinged at the back by a plate D, the end inner faces being chequered for firmly
engaging the projecting end of a key E, cottar, pin, bolt, rivet, or the like over
which the appliance can be fitted while resting on a shaft F.
In practice, supposing, say, a key E has to be withdrawn from a pulley G and
shaft between which it is secured. The two grip jaws C, C, are laid over its
projecting end and pressed into contact, the two screw rods B, B, are next adjusted
to bear against the boss H of the pulley G this tightens the grip of the jaws C, C,
on the key E, so that by continuing to rotate the screw rods B, B, the key is
gradually loosened for withdrawal.
The Figures indicate that the apparatus can be made to any size for withdraw-
ing keys of any kind from the head and this saves the usual method of driving the
key from the tail end with a key drift, an imperfect method at the best and often
times the tail end of a key is inaccessible.
We have shown the invention as we purpose using it and the advantage of
separate alternate action on the two rods B, B, by a spanner, is to wobble the
bridge A slightly from side to side and so loosen the key E gradually and then to
withdraw it, and if a short end of a key only projects, the plate D, Figure 2, can
be reversed by removing the nuts J, J, the head of said plate then being between
the jaws CC and forming an abutment for the outer ends of the jaws C, C, to bear
against, and. thus permit of the inner ends nipping the projecting end of the
short key. The plate head 1) when reversed for a short key maintains the
parallelism of the inner faces of the two jaws and prevents one jaw moving in
advance of the other when the screw rods B B are turned.
The apparatus can be specially adapted for use and the shape of the gripping:
part of the jaws C, C, could vary to suit the article to be acted upon. Should the
apparatus be made within certain limits for the use of Factory Hands and
Machinists, the jaws C, C, may form part of or be connected with the bridge A in
order to be handy when required.
Instead of the screw rods B, B, being fitted for withdrawal, hydraulic or some
other mechanical devices can be used between the bridge A and the pulley G.
Hurther, by making the inner ends of the jaws C, C, with catch clips I, as at
Figure 4, to grip behind a rivet head or the slightly projecting end of a pin, or
nail the action of the wedge shaped jaws in conjunction with the wedge shape of
the bridge checks when the screw rods 13, B, are turned would gradually increase
the grip as the bridge A moves forward and facilitate the ready withdrawal of the
rivet or pin.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. The improved apparatus shown on the annexed drawings for withdrawing
keys, cottars, pins, bolts, and rivets from pulleys, shafts, and other parts of
Machinery or Structures, as set forth.
2. An apparatus composed of a bridge A. with slotted base for reception of grip
jaws operable conjointly for withdrawing keys, cottars, pins, bolts, rivets, or the
A
E

page_text: like from pulleys and shafts and Machinery or Structures substantially as
described and shown.
1. OZALJ of Ontalion 1907
H. GARDNER
Patent Agent, 166 Fleet Street, London
Agent for the said :-
Thomas Cole
William Lawes Cole-and-
James Pearson Bush.