Year: 1887

page_text: Date of Application, 12th Nov., 1887
Complete Specification Left, 8th Aug., 1888
Complete Specification Accepted, 2nd Nov., 1888
We, ROBERT ALLEN, and WILLIAM JAMES WAKEFIELD, of West Challow,
Wantage, Berkshire, Engineers do hereby declare the nature of this invention to
be as follows :-
Our invention consists of improvements in connection with screw plates by the use
of which the balancing of any particular die on the plate is facilitated.
We place the screw plate in a frame so that the plate can be moved in the frame to
bring any die midway between the handles of the frame. Or we make one or both of
the handles movable up the plate and capable of being fixed at any desired position
on the plate. Or we may have the dies arranged circumferentially on a circular disk or
ring, which is movable in a frame, so that any required die can be brought round to a
position midway between the handles and fixed in that position. The frame may
consist of a balance wheel and in this case the circumference of the wheel will serve
as handles.
The plates may be provided with recesses into which may be fixed separate dies
and gauges.

page_text: Improvements in Connection with Screw Plates.
We, ROBERT ALLEN, and WILLIAM JAMES WAKEFIELD, of West Challow,
Wantage, Berkshire, Engineers 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:-
Our invention consists of improvements in connection with screw plates by the use
of which the balancing of the die on the plate is facilitated.
We effect our purpose by making an adjustable screw plate so connected to the
frame that any desired die can be brought into the centre of the frame, or by arranging
the dies on a circular band so that every die is midway between the handles, and a
further aid is provided by having a guide plate attached to the frame or the screw
plate and furnished with holes corresponding to the dies in the screw plate in order
to receive and steady the rod on which the screw is to be formed.
We furnish examples of the manner in which our invention may be carried out but
we do not limit ourselves to these but claim as our invention screw plates in which
every die is in or can be brought into the middle of the frame and with or without guide
plates. For the sake of simplicity we show in the drawings screw plates with dies
only but those furnished with notched holes and gauges can be used equally well. The
same letters represent corresponding parts in all the Figures.
Fig. 1 is plan of adjustable screw plate in frame with handles.
Fig. 2 is longitudinal section of same through middle showing guide plate also.
Fig. 3 is transverse section through dog.
Fig. 3ª is transverse section of plates with frame removed.
A is screw plate with dies B. is guide plate with holes D. E is frame solid with
handles. The screw plate A and guide plate Care joined to each other and kept apart
if desired by studs, rivets, or clamp pieces F. The plates A and C slide in grooves
on the middle part of frame E in order to bring any desired die into the centre of the
frame E, or the screw plate A only slides in grooves. The plates are fixed in any
desired position by the dog G moved on fulcrum H by set screw J. K is clearing
hole in frame E. The plates can be arranged on different sides of frame if
desired.
Fig. 4 is plan of frame with adjustable circular screw plate A beneath.
Fig. 5 is longitudinal section down middle of same.
Fig. 4 is a transverse section through middle of screw plate.
Fig. 4 is a transverse section through middle of screw plate and frame.
The plate or plates are secured to each other and to the frame E. with any desired
die in centre of frame by screw L and pins M which latter are fixed on frame and fit
into holes or notches N on plates.

page_text: Fig. 8 is plan of adjustable circular screw plate in hinged frame.
Fig. 9 is longitudinal section through middle of same showing guide plate C also.
Fig. 8 is a plan of frame E showing guide plate C beneath in dotted lines.
The two parts of frame E are hinged together at O and can be firmly secured
together by dog P working on fulcrum Qand moved by set screw R on one part of
frame. The end of dog P is furnished with a claw fitting into notch S on the other
part of frame. The screw plate A and guide plate Care connected together by
screw L and studs T, which latter screw into one plate and fit into holes or notches in
the other. The frame E has lugs V which fit in between the studs T and act as
drivers of the plates.
Fig. 8 is plan of another form of frame in which the pins T fit into the corners.
The dog P is shown here worked by spring J on frame.
Figs. 10 and 10 are forms of special studs T.
It is obvious that with these frames the dies may be on polygonal plates.
Fig. 11 is plan of adjustable circular screw plate A with beviled edge in
frame E.
Fig. 12 is longitudinal section through middle of same showing guide plate C also.
Fig. 13 is plan of dog W.
Fig. 14 is section of dog W through line
a,
b.
The frame E is here provided with a beviled edge or groove to fit screw plate A.
The screw plate A is fixed in any desired position by the stops Z on dog W fitting
into notches B' on plate. The dog W is pivoted at A' and fixed by set screw (1
working through frame E and impinging on lug L on dog.
Fig. 15 is plan of adjustable circular screw plate A in circular frame E.
Fig. 16 is plan of another form of circular frame.
It is obvious also that polygonal plates can be used with these two frames.
Fig. 17 is plan of adjustable circular ring screw plate A and frame E.
Fig. 18 is longitudinal section through middle of same.
In this case the handle E is screwed through a dog or clamp X into notches N on
screw plate. The ends of X turn over and grip the plate as shown at Y. The
screw plate itself is here used as a wrench in conjunction with the handle. A guide
plate could be fitted in the manner previously described.
Fig. 19 shows in section the screw plate A with beviled inside edge and arm of
clamp X grooved to fit it.
Fig. 20 is plan of circular ring screw plate with notches N on inside edge.
Here the handle E is screwed against the continuous outside edge of circular plate
and draws the arms of clamp X into notches N on interior of circular plate.
Fig. 21 is view of ring or band screw plate A fixed on frame E.
Fig. 22 is longitudinal vertical section of a similar band plate attached inside
a similar frame E. The guide plate could if desired be attached outside the
frame.
The screw band plate A fits into grooves or against lugs on frame E and is secured
by screws or pins M on frame fitting into holes or notches N on plate.
Fig. 23 is section through line a, b, in Fig. 21.
In the arrangements shown in Figs. 21-23 every die is in perfect balance. If the
band plate A is sufficiently large it can be used without a frame.
Fig. 24 is longitudinal section of an ordinary screw plate A with guide plate C
attached to frame E.
Fig. 24ª is transverse section through same showing plates A and C fitting into
frame E.
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 :
1st. An adjustable screw frame with solid dies so fitted to a frame that any required
die can be fixed in the centre of the frame.

page_text: 2nd. Adjustable screw plates with solid dios fitted into frames substantially as
described and shown in Figs. 1-20.
3rd. The forms of frames adapted to screw plates substantially as described in the
foregoing specification and shown in the drawings.
4th. A guide plate to be used with screw plates as described in foregoing
specification.
5th. A screw plate in circular band form with or without guide plate and with or
without frame as described in foregoing specification and shown in Figs. 21–23.
Dated this 8th day of August 1888.
W. H. MUNNS,
Agent for Applicants.