with Levers and otherwise.
Year: 1885

page_text: with Levers and otherwise.
We JAMES LANGDON of 3 Holyrood Villas Williamson Street Hedon Road Hull
Engineer JOSEPH ARMYTAGE WADE of Hornsea Timber Merchant and JOHN
CHERRY of Hornsea Brick and Tile Works Manager all in the East Riding of the
County of York do hereby declare the nature of the said Invention for "AN
IMPROVED SELF-APPLYING EXCENTRIC GRIPPING APPARATUS TO BE APPLIED TO
LEVERS FOR STOPPING AND STARTING OR CHANGING THE MOTION OF ENGINES AND
FOR OTHER PURPOSES IN CONNEXION WITH LEVERS AND OTHERWISE" to bo as
follows:-
The said Invention relates to a grip to a lever for changing the direction of
motion or for the stopping or starting of an engine or for any other purpose to
which such gripping apparatus may be applicable and is intended to obviate the
uncertainty and danger attending the present method of fastening the levers of.
locomotives and other engines when running at a great speed, and to enable the
driver to regulate them to a greater nicety at whatever speed they may be running
and to prevent the shaking and noise which occurs when the fastening by notching
becomes worn.
The said Invention will enable the driver to fasten the lever instantaneously at
any point on the quadrant by simply opening his hand and the grip being
practically free from friction its durability is indefinite and liberation from it is
given by simply grasping two levers.
The apparatus consists of a main lever working on a fixed centre or fulcrum to
which lever are applied excentric grip palls actuated by spring bars or of sufficient
weight to act as required by gravity. These grip palls are connected by links to
the spring bars so as to admit of each being forcibly applied to a quadrant or disc
or other suitable point of resistance arranged to receive the grip or thrust of the
palls and the edge of which may be varied in section to suit that of the palls.
The said spring bars work in fixed guides at top and bottom the bottom guides
being boxes containing the springs and these bars are capable of being acted upon
Prine 71

page_text: by means of a crank lever (jointed to the main lever) in such a manner as to
disengage the grip. This is effected by pressing the said crank lever towards the
main lever and thereby bringing the crank down upon the end of the spring bar
and causing it to open the links of the grip.
The centre or fulcrum of the main lever is supported by a suitable standard and
the lever is intended to be connected at one end or other part thereof (by meaus
of connecting rods) with the valve gear or other part or parts of mechanism
required to be operated upon.
There is an indicator applied to the main lever serving to shew the position or
angle of the lever upon the quadrant plate.
The palls are arranged to work on each side of the main lever and to act on a
quadrant plate or disc correspondingly placed or they may be arranged to act on
one side of the lever and with one quadrant plate or disc.
When the grip palls are intended to act by gravity only their weight will be
increased so as to counterbalance that of the bar.
Although the said Invention is designed chiefly for steam engines it is applicable
to other machines wherein either a sudden or firm grip or instantaneous liberation
from a grip may be required.
W. SPENCE & SON,
Agents for the Applicants.

page_text: uncertainty and danger attending the present method of fastening the levers of
locomotives and other engines when running at a great speed, and to enable the
driver to regulate them to a greater nicety at whatever speed they may be running,
and to prevent the shaking and noise which occurs when the fastening by notching
becomes worn.
The said Invention will enable the driver to fasten the lever instantaneously at
any point on the quadrant by simply opening his hand, and the grip being
practically free from friction its durability is indefinite and liberation from it is
given by simply grasping the two levers.
The apparatus consists of a main lever working on a fixed centre or fulcrum to
which lever are applied excentric grip palls actuated by spring bars or of sufficient
weight to act as required by gravity-These grip palls are connected by links to
the spring bars so as to admit of each grip pall being forcibly applied to a
quadrant or disc or other suitable point of resistance arranged to receive the grip
or thrust of the palls, and the edge of which may be varied in section to suit that
of the palls.
The said spring bars work in fixed guides at top and bottom, the bottom guides
being boxes containing the springs, and these bars are capable of being acted upon
by means of a crank lever (jointed to the main lever) in such a manner as to
disengage the grip. This is effected by pressing the said crank lever towards the
main lever and thereby bringing the crank down upon the end of the spring bar
and causing it to open the grip palls.
The centre or fulcrum of the main lever is supported by a suitable standard, and
the lever is intended to be connected at one end or other part thereof (by means of
connecting rods) with the valve gear or other part or parts of mechanism required
to be operated upon.
There is an indicator applied to the main lever serving to show the position or
angle of the lever upon the quadrant plate.
The palls are arranged to work on each side of the main lever and to act on a
quadrant plate correspondingly placed, or they may be arranged to act on one side
of the lever and with one quadrant plate or disc.
When the grip palls are intended to act by gravity only their weight will be
increased so as to counterbalance that of the bar.
Although the said Invention is designed chiefly for steam engines it is applicable
to other machines wherein either a sudden or firm grip or instantaneous liberation
from a grip may be required.
In order that our Invention may be fully understood we will proceed to describe
it more particularly by the aid of the accompanying drawings in which are repre-
sented the parts of apparatus above referred to.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a side elevation and Fig. 2 a front elevation of the gripping apparatus,
in which two figures the same letters of reference indicate corresponding parts.
A is the main lever having its fulcrum at J fixed to the standard M as shewn,
BB are the quadrants which are gripped by the excentric grip palls C and D
which may be made either to be acted upon as required by springs or of sufficient
weight to dispense with the need of springs. E E are connecting links between
the grip palls C. D. and the spring bars F, F, and which on receiving pressure from
the crank lever I are caused to throw open the grip palls and liberate the main
lever. G. G are boxes containing springs for acting on the bars F, F, and closing
the grip palls C. D. when the hand pressure is removed from the crank lever.
HH are guides for the ends of the spring bars I is the crank lever for dis-
engaging the grip by its being pressed towards the main lever A, whereby the
crank is thrown upon the ends of the spring bars, which by descending cause
the grip palls to be opened through the medium of the connecting links. J is the
centre or fulcrum on which the main lever works, but it may be fixed in a position

page_text: different from that shewn in the drawing if required. K is an indicator shewing
the position or angle of the main lever A on the quadrant plate.
Lis the end of the main lever where it is intended to be connected with the
valve gear or other mechanism required to be operated upon.-This connection may
be made in such other part or parts of the lever as may be most suitable for acting
on the said mechanism. M is the standard for supporting the apparatus. O. O. are
supports for the outer ends of the quadrant plate P. P. are bolts for securing the
quadrant plate to the standard.
With reference to the grip palls C, D, we would remark that they may be varied
in the section of their gripping edge in order to suit the form of the edge of the
quadrant on which their gripping force is to be exerted. Also that when they are
made to descend by their own weight without the aid of a spring to raise the bar F
their weight would have to be increased to the extent required to counterbalance
the weight of the bar. Also that instead of the arrangement shewn and described
they may be arranged to work only on one side of the main lever and with only
one quadrant or disc. And in other respects the forms and arrangements may be
varied in detail without altering the character of the apparatus.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is
First. The excentric grip palls with their gripping edge either as shewn or of
any other required section and whether acting by the aid of springs or by gravity
substantially as described.
Secondly. The quadrant specially adapted to receive the grip or thrust of the
excentric palls on its suitably formed edge, substantially as described.
And lastly. The general arrangement and combination of the parts forming the
entire gripping apparatus substantially as described.