Year: 1886

page_text: Date of Application, 26th Oct., 1886.
Complete Left, 23rd July, 1887.
Complete Accepted, 2nd Sept., 1887.
I WILLIAM WILLOTT POPPLEWELL of the firm of Popplewell Colton and Co. Patent
Agents and Consulting Engineers of 17 and 18 Southampton Buildings in the county
of Middlesex do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in apparatus for clamping or nipping rods,
tubes pipes, bars, nuts, tools and the like in order to manipulate or operate on same or
for other purposes where an object is to be grasped between moving jaws.
The said invention consists in arranging moving jaws working in suitable guides and
operated by links pivoted thereto and also pivoted to a moving block or slide operated
by a screw or equivalent so that by the motion of the block or slide the links are
caused to force the jaws to clamp or nip an object inserted between them.
For instance in applying the invention to a lathe-dog a suitable frame is provided
with a notch or slot on either side of which are arms or shanks in which are formed
oppositely inclined slots in which work sliding jaws shaped at their ends with chisel or
sharp points and below these with curved smooth or serrated gripping surfaces.
Links are pivoted to these jaws and to a sliding block working in a groove or
recess in the frame and operated by a screw working freely in the frame and entering
the block.
By inserting a rod, tube, bar, tool or other article and working the screw the curve 1
surfaces on the jaws clamp or nip the same as the block is pulled back by the screw
and by continuing the motion the chisel or sharp points on the jaws are caused to nip
the object held between the jaws, or, for a wrench or for operating on bars nuts and
the like, the jaw ends can be rebated or made to overlap or engage and the sliding
block formed to receive the article and the screw end can turn in the block. The
frame is furnished with handles to turn the whole.

page_text: For a pipe
or tube wrench or for other purposes the screw may abut on a curved
jaw pivoted at one end to nip the pipe or tube as the tool is worked forward by its
handle or handles after the sliding jaws have clamped the object between them and
the curved jaw which said jaw may be serrated if desired on its gripping surface, the
backward motion of the tool releases the curved jaw from the object.
The shape of the jaws and sliding block can be varied to suit the shape or contour
of the object to be operated upon.
Dated this 26th day of Acta 100%
POPPLEWELL, COLTON & Co.,
Agents for the Applicant.
A communication from abroad by WILLIAM DANIEL ELGER, of the City, County, and
State of New York, United States of America, Manufacturer.
WILLIAM WILLOTT POPPLEWELL of the firm of Popplewell Colton & Co. Patent
Agents & Consulting Engineers of 17 & 18 Southampton Buildings London W.C. in
the County of Middlesex, 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:-
The object of my invention is to provide a new and improved clamping device which
can be used as a lathe-chuck, lathe-dog, pipe wrench, screw pipe holder etc. for
holding rods, tubes, bits, and other pieces of machinery.
The Invention consists in the combination with a frame, having guides for sliding
jaws, of links pivoted to the jaws and to a cross piece through which a screw is passed
which is used for adjusting the jaws all as will be fully described and set forth
hereinafter and pointed out in the claims.
In the accompanying drawings Figure 1 is a longitudinal sectional view of a lath
dog provided with my improved clamping device.
Figure 2 is a face view of the same, parts being broken out and others in section.
Figure 3 is a cross sectional view on the line x. x. Fig. 1. Figure 4 is a side view.
Figure 5 is a sectional plan view on the line y. y. Fig. 1. Figure 6. is a longitudinal
sectional view of the stock for holding bits, provided with my improved clamping
device.
Figure 7 is a sectional view of a wrench provided with my improved clamping
device, and, Figure 8 is a detail sectional view of another construction for the inner
end of the screw.
Similar letters of reference indicate corresponding parts.

page_text: The casing or frame A is provided with a notch or recess A forming two
shanks B. B. Said notch is in the bottom of the frame, which for convenience is
shewn inverted in Figure 1. In each shank B. an inclined guide groove C is formed
in which a sliding jaw D. is mounted, the jaws being guided by the sides of the
groove. To each jaw a link D¹ is pivoted the end of the link being within a suitable
recess in each jaw as shewn in Figure 1, and the other end of the links are pivoted
within slots of a cross piece E. mounted to travel in a recess E¹ in the casing A.
A screw F. is passed through an aperture F³ in that end of the casing opposite
the one provided with the notch A¹ and through the aperture F¹ in the closed end of
the notch A¹.
The apertures in the casing A through which the screw F is passed are not screw
threaded and the screw can pass through them freely but the aperture in the cross
piece E is screw threaded. The inner end of each jaw D. is provided with a transverse
chisel edge or lip a at that surface of the jaw nearest the open end of the notch or
recess A and from said chisel edge or lip, the curve extends to the side of the jaw
opposite to the one at which the chisel edge is formed. This curved surface may be
smooth or serrated. The frame A is passed over the rod G or other article to be held
by the dog until the article rests on the closed end of the notch A¹ and the screw F is
moved in the direction of its length as indicated by the arrow a¹ until the cross
piece E is checked by the jaws striking against the rod G. By thus moving the
cross piece E, the links D¹ of the jaws D are brought into the position shewn in
Figure 2. By pulling the screw F in the direction of the arrow a¹ its inner end is
pulled from the closed end of the notch A¹. The screw F is then turned so as to
move in the inverse direction of the arrow a¹ until its inner end rests against the rod G.
By continuing the turning of the screw which can travel no further in the inverse
direction of the arrow a¹ as it rests against the bottom of the rod held by the jaws I).
the crosspiece E is moved slightly in the direction of the arrow a¹ whereby the lips
or chisel edges are pressed into the surface of the rod G, or at least are pressed upon
it with sufficient pressure to prevent the slipping of the rod G and the same is thus
held securely.
When the rod G is to be removed, the screw F is loosened so as to permit of moving
the cross piece E in the inverse direction of the arrow a¹ whereby the jaws D are moved
from each other thus releasing the rod or bar G.
The casing A may be provided with any suitable handle.
In the construction shewn in Fig. 6 the casing or frame is provided with two
opposite handles J for turning it, and the sliding jaws D have their inner ends
rabbeted so as to overlap or the edges may be bent or otherwise mounted so as to
overlap more or less. The inner ends of the sliding jaws rest on the block K, having
the V shaped notch K in which block the inner end of the screw F is mounted to
turn the block being fixed and not adapted to have any movement.
In the construction shewn in Figure 7.but a single handle J' is provided, at the
closed end of the notch A¹ the jaw L is pivoted in the casing one edge of said jaw
being serrated or toothed and the other edge curved and facing the inner end of the
screw F. If desired the screw F may be provided with a head M which is so mounted
that the screw can turn on it, said head being guided in the frame so as to have a
movement in the direction of the length of the screw F. The head M is provided in
its, upper part with a circular or segmental recess adapted to receive the rod or tube,
as shewn in Figure 8.
The jaws D may in all cases be provided with the lip and chisel edge a or they may
have segmental recesses fitting on the cylindrical object such as a rod or tube, or they
may be cut off square as shewn if Fig. 6. To hold a roamer or other bit or screw
cutting die, the screw F is turned so as to move the cross piece E and the links D' in
the direction of the arrow d¹ Figure 6, whereby the inner ends of the jaw are moved
from each other, thus forming a recess or cavity for receiving the die or bit. Then
the direction of the rotation of the screw F is reversed for the purpose of moving the
cross piece E in the inverse direction of the arrow d¹ whereby the jaws are prsesed
against the walls of the casing.

page_text: The casing A is turned by means of the handles J and the casing may be used, as
any other stock or bit holder. Stocks or bits of various size can be easily held in the
frame and can be adjusted fastened or loosened easily and rapidly.
In the construction shewn in Fig. 7 which is a pipe wrench and which is turned by
means of the handle J¹, the screw F is turned so as to move in the inverse direction
of the arrow h¹ to permit the jaw L to swing down into a cavity in the casing. The
tube P is placed on the closed end of the notch A¹ and then the screw F is moved in
the inverse direction of the arrow h¹ whereby the cross piece Ę is moved in the same
direction and the inner ends of the jaw D are pressed against said rod or tube.
The screw F is then turned so as to move in the direction of the arrow h¹ and
raise the inner end of the serrated jaw L.
When the device is turned in the direction of the arrow m¹ the serrated edge of
the jaw L does not grip the rod but when the device is turned in the inverse
direction of the arrow m¹ the teeth of the jaw L take on the tube or rod P and
turn the same as indicated by the arrow n¹ Figure 7.
The parts can be adjusted to hold or release the tube very easily and rapidly
and the device never fails to grip the rod or tube.
The device shown in Fig. 6 is merely a modification of that shown in Fig. 7
and may be used in a lathe dog or chuck.
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 :-
First: A clamping device consisting of a casing provided with sliding jaws
adapted towards and from each other, a cross piece connected by links with said
jaws and a screw passed through a screw threaded aperture in the cross piece
substantially as shown and described.
Second In a clamping device, the combination, with a casing having guide
grooves, of sliding jaws in said guide grooves, a cross piece, links connecting the
cross piece with the sliding jaws and a screw passed through a screw threaded
aperture in the cross piece substantially as shewn and described.
Third In a clamping device, the combination of the casing having guide grooves,
of sliding jaws in said grooves, a cross piece, links connected with the cross piece, a
screw passed through a threaded aperture of the cross piece which screw is mounted
to move freely in the direction of its length with the cross piece through which it is
screwed, in the casing substantially as shown and described.
Fourth In a clamping device the combination with a casing having guide
grooves, of jaws mounted to slide in said grooves, a cross piece links connecting the
cross piece with the sliding jaws, a screw passing through a screw threaded aperture
in the cross piece, and a head in which the inner end of the screw is mounted to turn
substantially as shewn and described.
Fifth In a clamping device the combination with the casing of the sliding jaws
in the same, a crosspiece, links connecting the crosspiece with the sliding jaws, a screw
passed through a screw threaded aperture in the crosspiece, and a handle on the casing,
substantially as shown and described.
Sixth-In a clamping device, the sliding jaw D provided with a chisel edge lip a
and a curved recess on the end substantially as shown and described.
Dated this 23rd day of July 1887.
POPPLEWELL, COLTON & Co.,
Agents for the Applicant.