Testing Machines.
Year: 1886

page_text: Date of Application, 19th Nov., 1886.
Complete Left, 19th Aug., 1887.
Complete Accepted, 20th Sept., 1887
Testing Machines.
I GEORGE HENRY DENISON of 25 North Street, Leeds, in the County of York,
Machine Maker, do hereby declare the nature of my said invention to be as follows:-
The object of this invention is to provide a quick and ready means of grasping
specimens of metal or other substances to be tested.
I first construct a shackle having at one end a suitable means of attachment to the
testing machine and having at the other end provision for holding two short shafts or
pins, upon which are mounted two excentric blocks of steel geared together in such a
manner that their peripheries which are roughened, approach and recede from each
other when they are turned round. The specimen to be tested is inserted between
the two blocks which are then revolved so as to close upon it and any pull upon the
specimen causes the blocks to close still further and grasp the specimen tighter.
In some cases I prefer to use two loose wedge shaped pieces of steel, having their
inner faces roughened, instead of the before mentioned steel excentric blocks, and in
this case the shackle is additionally provided with a taper box in which the two loose
pieces of steel are moved so as to approach and recede from each other, by two short
arms carried by the shafts or pins before mentioned and geared together as before
explained to give a simultaneous movement.

page_text: COMPLETE SPECIFICATION.
Improvements in Clips or Grippers for Holding Specimens in
Testing Machines.
I, GEORGE HENRY DENISON, of 25 North Street, Leeds, in the County of York,
do hereby declare the nature of my said invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:
The object of this invention is to provide a quick and ready means of grasping
specimens of metal or other substances to be tested or pulled. I first construct a
shackle, having at one end a suitable means of attachment to the testing machine, and
having at the other end a taper box and provision for holding two short shafts
or pins.
In the box are two wedge shaped pieces of steel, roughened on their faces, and free
to slide up and down in the box. Upon the shafts are fastened two levers, each
having a finger which projects through the side of the box, and fits into a recess in
the steel wedge or die. The levers are geared together by means of gear wheels or
segments, secured to the shafts.
The dies may be coupled together by means of a spring at the top, to cause them
to separate when lifted, or they may have grooves cut in their sides, parallel to their
backs, and pins suitably fitted in the box for effecting the same purpose.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a side elevation; Fig. 2 an end elevation, and Fig. 3 a sectional elevation,
shewing my invention, as constructed for grasping wire.
bis the shackle and clip box, having provisions 61 for receiving the axles ff. The
clip box is tapered, internally to receive the two wedges c c. The wedges have
recesses to receive the ends of the projecting fingers e e. The wedges are fitted with
a spring h, which causes them to separate, when raised by the fingers e e. The
wedges are sometimes formed with grooves, as shewn by dotted lines at c¹, in which
grooves pins fixed to the wedge box enter, and act as guides to separate the wedges,
when moved upwards. When so formed and fitted the spring h may be dispensed
with. d d are hand levers carried by the axles ff, and operating the fingers e e,
whereby the wedges cc are raised and lowered. The inner sides of the wedges c c
may be variously formed to suit the shape of the particular material to be tested ;
having grooves or channels in some cases, and in others merely flat roughened
surfaces for securing the material. In the drawings the apparatus is shewn gripping
a wire a. 99 are two toothed segments, fitted to the axles ff, to insure simultaneous
motion of the levers, fingers, and wedges.

page_text: 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 :-
1. The manufacture and use of clips or grippers having a shackle and wedge box b,
fitted with movable wedges cc, levers d d working upon axles ff, carrying geared
toothed segments g g, and having fingers e e, for simultaneously raising and lowering
the wedges, substantially as and for the purposes herein before described and shewn
on the drawings.
2. The application and use of the spring / for the purpose of opening out or
separating the dies, when lifted, substantially as herein before described and shewn on
the drawings.
3. The application and use of guiding grooves c¹ for receiving fixed pins, together
operating as substitutes for the spring h, and for a similar purpose, substantially as
herein before described and shewn on the drawings.
4. The general construction combinations and arrangements of the several and
respective parts, together forming my improvements in clips or grippers for holding
specimens in testing machines, substantially as herein before described and shewn on
the drawings.

page_text: Date of Application, 19th Nov., 1886.
Complete Left, 19th Aug., 1887.
Complete Accepted, 20th Sept., 1887
Improvements in Clips or Grippers for Holding Specimens in
Testing Machines.
I GEORGE HENRY DENISON of 25 North Street, Leeds, in the County of York,
Machine Maker, do hereby declare the nature of my said invention to be as follows:-
The object of this invention is to provide a quick and ready means of grasping
specimens of metal or other substances to be tested.
I first construct a shackle having at one end a suitable means of attachment to the
testing machine and having at the other end provision for holding two short shafts or
pins, upon which are mounted two excentric blocks of steel geared together in such a
manner that their peripheries which are roughened, approach and recede from each
other when they are turned round. The specimen to be tested is inserted between
the two blocks which are then revolved so as to close upon it and any pull upon the
specimen causes the blocks to close still further and grasp the specimen tighter.
In some cases I prefer to use two loose wedge shaped pieces of steel, having their
inner faces roughened, instead of the before mentioned steel excentric blocks, and in
this case the shackle is additionally provided with a taper box in which the two loose
pieces of steel are moved so as to approach and recede from each other, by two short
arms carried by the shafts or pins before mentioned and geared together as before
explained to give a simultaneous movement.

page_text: Testing Machines.
I, GEORGE HENRY DENISON, of 25 North Street, Leeds, in the County of York,
do hereby declare the nature of my said invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the following
statement:
The object of this invention is to provide a quick and ready means of grasping
specimens of metal or other substances to be tested or pulled. I first construct a
shackle, having at one end a suitable means of attachment to the testing machine, and
having at the other end a taper box and provision for holding two short shafts
or pins.
In the box are two wedge shaped pieces of steel, roughened on their faces, and free
to slide up and down in the box. Upon the shafts are fastened two levers, each
having a finger which projects through the side of the box, and fits into a recess in
the steel wedge or die. The levers are geared together by means of gear wheels or
segments, secured to the shafts.
The dies may be coupled together by means of a spring at the top, to cause them
to separate when lifted, or they may have grooves cut in their sides, parallel to their
backs, and pins suitably fitted in the box for effecting the same purpose.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a side elevation; Fig. 2 an end elevation, and Fig. 3 a sectional elevation,
shewing my invention, as constructed for grasping wire.
b is the shackle and clip box, having provisions b¹ for receiving the axles ff. The
clip box is tapered, internally to receive the two wedges c c. The wedges have
recesses to receive the ends of the projecting fingers e e. The wedges are fitted with
a spring h, which causes them to separate, when raised by the fingers. ee. The
wedges are sometimes formed with grooves, as shewn by dotted lines at c¹, in which
grooves pins fixed to the wedge box enter, and act as guides to separate the wedges,
when moved upwards. When so formed and fitted the spring may be dispensed
with. d d are hand levers carried by the axles ff, and operating the fingers e e,
whereby the wedges c c are raised and lowered. The inner sides of the wedges c c
may be variously formed to suit the shape of the particular material to be tested ;
having grooves or channels in some cases, and in others merely flat roughened
surfaces for securing the material. In the drawings the apparatus is shewn gripping
a wire a. 99 are two toothed segments, fitted to the axles ff, to insure simultaneous
motion of the levers, fingers, and wedges.

page_text: 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 :-
1. The manufacture and use of clips or grippers having a shackle and wedge box b,
fitted with movable wedges cc, levers d d working upon axles ff, carrying geared
toothed segments 9 g, and having fingers e e, for simultaneously raising and lowering
the wedges, substantially as and for the purposes herein before described and shewn
on the drawings.
2. The application and use of the spring for the purpose of opening out or
separating the dies, when lifted, substantially as herein before described and shewn on
the drawings.
3. The application and use of guiding grooves c¹ for receiving fixed pins, together
operating as substitutes for the spring h, and for a similar purpose, substantially as
herein before described and shewn on the drawings.
4. The general construction combinations and arrangements of the several and
respective parts, together forming my improvements in clips or grippers for holding
specimens in testing machines, substantially as herein before described and shewn on
the drawings.