Improvements in Grippers and Gripper Dies for Cable Tramways.
Year: 1892

page_text: Date of Application, 22nd Mar., 1892
Complete Specification Left, 20th Dec., 1892-Accepted, 21st Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Grippers and Gripper Dies for Cable
Tramways.
ALFRED DICKINSON Civil Engineer Tramway Depôt Darlaston South Stafford-
shire do hereby declare the nature of this invention to be as follows:-
The upper and lower jaws of the gripper are grooved to receive the gripper dies
which are dovetail in form, so as to prevent them falling out of the jaws when
broken, and slide into the grooves in the jaws from the trailing end of the gripper.
The grooves for the dies are stopped within a short distance of the leading end of
the gripper leaving the metal forming the jaws to act as a stop and maintain the
dies in the position required, and at the trailing end of the gripper, the dies are
held in position by means of blocks dovetailed into the gripper jaws and secured by
means of set pins.
Dotad this 21st day of March 1892
COMPLETE SPECIFICATION.
Improvements in Grippers and Gripper Dies for Cable
Tramways.
ALFRED DICKINSON Civil Engineer Tramway Depôt Darlaston Staffordshire,
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 :-
My invention consists of improvements in the form of the jaws and dies of
grippers for cable tramways by which means the dies are prevented from falling out
or becoming loose when worn or broken. The jaws of the gripper are grooved to
receive the gripper dies which are dovetail in form and slide into the gripper jaws
from the trailing end of the gripper, at the leading end of the gripper stops are
formed in the jaws which retain the dies in the requisite position and the trailing
ends of the dies are held in position by means of locking blocks which are dovetail
in form and secured to the jaws by means of set pins.
In order that my invention and the manner of employing it may be clearly
understood I have appended hereunto one sheet of drawings which I will now
proceed to describe.
Figure 1. is a plan of the top jaw of the gripper A. shewing the gripper die B.
in dotted lines, the stop E. is also shewn in dotted lines, the dovetail locking
block C. is shewn in firm lines and is kept in position by means of the set pin D.
Figure 2. is a longitudinal section through the centre of the gripper die B.
shewing the upper gripper jaw A., the stop E., the dovetail locking block C. and
the set pin D.
Figure 3. is a longitudinal section through the centre of the gripper die B¹
shewing the lower gripper jaw A', the stop E³, the dovetail locking block C' and
the set pin D'.
Figure 4. is a plan of the lower gripper jaw A' shewing the gripper die B¹ in
position against the stop E', the dovetail locking block C¹ holding the die in position
and the set pin D' securing the locking block.
Figure 5. is an end elevation of the top gripper jaw A. shewing the end of the
gripper die B., the dovetail locking block C. and the set pin D.
Figure 6. is an end elevation of the lower gripper jaw A' shewing the end of
the gripper die B', the dovetail locking block C¹ and the set pin D',

page_text: Figure 7. is a transverse section through the lower gripper jaw shewing
manner in which the gripper die B' is held in the jaw A¹.
Figure 8. is a transverse section through the upper gripper jaw shewing the
manner in which the gripper die B. is held in the jaw A.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare what I
claim is :-
1. Gripper jaws grooved to receive the gripper dies with stops for the said dies
at the leading end, substantially as shewn and herein described.
2. Gripper dies dovetail in form to slide into the grooves in the gripper jaws,
substantially of the form shewn and herein described.
3. The dovetail locking blocks fitting into the gripper jaws and secured by the
set pins substantially as shewn and herein described.
Dmber 1892.
DICKINSON.
ALFRED DICKINSON.