Improvements in Copying Presses.
Year: 1890

page_text: Date of Application, th May, 1890
Complete Specification Left, 28th Jan., 1891-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Copying Presses.
I, GASPARD GILBERT, of Montbéliard (Doubs), in the Republic of France,
do hereby declare the nature of this invention to be as follows :-
This invention relates to copying presses such as are used for compressing books
or registers and the like for the purpose of copying writing or drawings so as to
have a faithful impression or representation thereof.
The press consists of a preferably rectangular case or frame which may be
arranged either vertically or horizontally against a wall, a partition, or any vertical
structure, or upon a table. In this rectangular case provided with an external rigid
wall of wood or metal a rectangular plate is adapted to move in a direction parallel
to the bottom plate and constitutes the sliding platform between which and the
wall of the case the book is compressed. To move this plate rollers are provided
which act upon its lower surface upon which inclines are formed for the purpose.
These rollers which move on the plane bottom or wall of the case are capable of
being moved closer together or farther apart according as it is desired to raise or
lower the said sliding platform. For this purpose their bearings are provided each
with a screw nut into which is fitted a screw spindle having right and left screw
threads formed upon it. This screw spindle is journalled in the opposite walls of
the case and the thread changes about the middle of its length so that when it is
turned by means of a handle attached to it externally it will move the bearings of
the rollers closer together or farther apart.
In an alternative arrangement the rollers may be attached to the lower portion
of the movable plate of the press in which case the screw spindle will move the
inclined plane or planes upon which the said rollers are adapted to run.
Thus it is
the inclined planes instead of the rollers themselves (which only turn about their
own axes) that are adjustable in this arrangement. The book or article to be
compressed is placed into the case between the movable platform and the rigid
cover of the case and the desired pressure is obtained by driving the movable
platform against the cover of the case.
Dated this 8th day of May 1890.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Copying Presses.
I, GASPARD GILBERT, of Montbéliard (Doubs), in the Republic of France, 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 :-
This invention relates to copying presses such as are used for compressing books
or registers and the like for the purpose of copying writing, drawings or the like
so as to have a faithful impression or representation thereof.
In the accompanying drawings is shown one form of press constructed in
accordance with my invention.
Fig. 1 is an inverted plan of the press. Fig. 2 is a longitudinal section thereof.
Fig. 3 is a cross section through the axis of one pair of the rollers.
Fig. 4 is a transverse section of another arrangement of the mechanism of the
press.
This copying press is enclosed in a case or frame a either cast or otherwise
Price 7

page_text: made of any suitable metal or wood of a size corresponding to that of the articles
to be compressed.
This case in the shape of a parallelopiped may be either open or closed at the
bottom.
To the front side of it is pivottel a plate or shatter of wood or metal supported
by hinges and adapted to be turned in such a manner as to expose the front
opening of the ease for the reception of a letter look or the like. The shutter a is
provided with a closing rod or bolt controlled by a spiral spring m", au a
rod m is arranged so that on inserting the operating handle the bolt will be
released. In order to further assist the opening of the said shutter two rods
controlled by spiral springs a located on either side of the front portion of the case,
tend to drive the shutter away from the case it. Within the case are arranged a
bearing and four lugs or bosses 77' integral with the wall of the case
The
bearing d supports the shaft which is provided with right and left handed screw
threads the direction changing in the middle of the shaft. The opposite end of the
shaft is supported in another journal situated upon the opposite or back wall of
the case. To close the opening at the journal of on this back -urface a plate k may
be screwed on to it. The halt e terminates at a in a square end.
h
The lugs / and y³ integral with the journals of and dª Support the bottom piere g
where the case is open below. Suitable screws enable this bottom piece to be firmly
attached to the lugs so that it may form a rigid support.
I'
"'
Upon the shift equidistant from the centre of its length there are nut- & made
of bronze or other suitable material and threaded to correspond with the threads
on the shaft. Each of these muts carries the spindle of one pair of rollers j
permanently held in position in relation to the shafte by collars or pins . Upon
these rollers rests a plate of wood metal or other suitable material provided on
its lower surface with a series of inclines which may as in this in-tance form a
truncated pyramid. The plate is constantly drawn towards the bottom of the
case by four or other desired number of spiral springs which hold the plate ↳ in a
position parallel to the cover of the case, owing to the permanent bearing of the
inclines formest on the lower surface of plate upon the peripheries of the rollers j
Between the front rollers and the bearing is arranged a screw or stop / whereby
the extent of motion of the nuts is limited and the rollers are prevented from
coming in contact with the walls of the case. On the square end o of shaft e
may be fitted the socket of a crank handle ¿. It is then only necessary to turn this
crank either to the right or left to move the nuts & closer together or farther apart
as the case may be and to cause a corresponding movement of the rollers j and
consequently to move the plate & nearer to or farther from the top of case a.
The operation is as follows:-
h
"
The crank handle or key is fitted on to the square end o.
The rod mrises and
releases the bolt of the shutter a'. The spring-controlled rods under the influence
of their springs drive forth the shutter which may then readily be opened by hand
and if required pushed upon the upper wall of the ease . The letter book or the
like is then introduced between the plates a and b and by turning the crank
handle i so as to impart to the shaft e movement in the required direction the
rollers are carried by the muts & one towards the other owing to the opposite
direction of the thrands on the shaft. e. The plate then rises and presses the
letter book against the wall or plate a of the ease. When the required amount of
pressure has been obtained and if necessary maintained for a sufficient time the
crank handle may be turned in the opposite direction when the pressure will be
withdrawn and the book may be removed. If however it is desired to keep the
book locked in the press so as to prevent its removal it may be left upon the
plate the shutter turned down and the crank or key taken off in which case
the bolt m descends and retains the shutter a in position.
1 will be readily understood that the rollers may be suspended from the
underside of the plate & and the inclines may be arranged upon the movable mutsk
as shown in dot and dash lines in Fig. 2. The operation of the shaft would be

page_text: exactly the same as in the first mentioned arrangement. To construct the apparatus
so that an increased pressure may be applied additional bearings may be arranged
within the case on the same level as the first as shown in Fig. 4 for the purpose of
supporting a shaft c¹ terminating in a square in which case the shaft c is
unprovided with any such square. Upon this auxiliary shaft c' is mounted a
pinion q in gear with a toothed wheel secured on the shaft c the relative pitch
of these toothed wheels p and q being so proportioned that a sufficient pressure is
exercised upon the plate & without submitting the crank to undue strain.
"
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A copying press consisting essentially of a case having a rigid external walls
such as a and in which a compressing plate such as parallel to the top of the case
is arranged to move under the action of rollers adapted to bear against inclines
when the rollers are moved nearer to each other or farther apart as the case may
be such movements being imparted to the said rollers by means of a shaft or
spindle having right and left handed screw threads which act upon the spindles of
the said rollers, substantially as described and illustrated in Figs. 1, 2 and 3 of the
accompanying drawings.
2. A copying press with a movable compressing plate adapted to be operated by
rollers arranged underneath the said plate and operating upon inclines the spindles
of said rollers being provided with nuts passed respectively on the right and left
handed threads of a screwed shaft arranged so that it may be rotated by a crank
handle or equivalent device substantially as described and shown in Figures 1 and 2
of the accompanying drawings.
3. The mechanism of a copying-press operated either directly by means of a
crank or key substantially as described and shown in Figs. 1, 2 and 3 or indirectly
through the medium of suitable gearing substantially as described and shown in
Fig. 4 of the accompanying drawings.
Dated this 27th day of January 189.
W. P. THOMPSON & BOULT,
Agents for the Applicant.