Improvements in Apparatus for Printing and Mounting Lantern Slides and Transparencies.
Year: 1892

page_text: Date of Application, 28th Mar., 1892
Complete Specification Left, 27th Dec., 1892-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Printing and Mounting Lantern
Slides and Transparencies.
I, JAMES ROBSON RENDELL Whinside Whalley Road Accrington do hereby
declare the nature of this invention to be as follows:-
The first part of my invention is a frame for printing lautern slides and trans-
parencies. I make two frames of wood or other material. In one of these which
I call the bottom frame there is an opening, square or otherwise, in the case of
lantern slides three inches square. In the other or top frame an opening is made a
little larger than the opening in the bottom frame; in the case of lantern slides
three and a quarter inches square. Through this hole a sensitive plate can pass.
These boards or frames are held in contact by springs, in such position that the
openings are exactly opposite each other, so that when a negative is placed between
the two boards it kept firmly in position.
At one end of the top board a lever is fixed by means of which the top board
may be raised so as to insert a negative between the two boards in any position
that may be required.
On the top side of the top board a wood or metal back is attached by a special
form of hinge. This back fits exactly into the opening of the top board. This
back is kept in position by a spring as usually used in printing frames. These
boards are covered with cloth or other suitable soft material on all parts which
come into contact with the glass plates.
To cut round masks to be used in the printing frame or for mounting lantern
slides or transparencies I make a pad of wood or metal, flat on the under
surface. This pad has a round hole running through its axis at right angles
to the under surface. In this hole a rod of circular section and fitting the
hole is placed. It projects from the pad on the upper surface. A radial arm
is attached to this rod by a hinge or a spring. On the radial arm slides another
piece of metal carrying a circular cutter of steel, the plane of the cutters
being at right angles to the direction of the radial arm. A scale is engraved
on the radial arm so that the cutter can be placed at any required distance from
the centre.
Dated this Twenty-sixth day of March 1892.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Printing and Mounting Lantern
Slides and Transparencies.
JAMES ROBSON RENDELL Minister of Religion, Whinside, Whalley Road,
Accrington 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 :-
In connexion with the printing and mounting lantern slides and transparencies
my improvements consist:-
:-
(1) In a frame which enables the operator to put the sensitive plate in any
required position upon the negative without adjustments in the dark room.
2. In a cutter for circular masks needed for printing and mounting lantern
slides and transparencies.

page_text: •
The drawings on Sheet (1) shew the details of the frame for printing trans-
parencies and lantern slides."
Fig. I shews the frame as seen from the bottom.
Fig. II shews the frame as seen from the top.
Fig. III shews the frame as seen in vertical section.
Fig. IV shews the frame as seen sideways.
Fig. I shews the bottom board in which a hole is cut the size of the slide or
transparency to be printed. In the case of lantern slides this hole is
three and a quarter inches square. A board C fits into this hole and is attached
to the frame A by two double hinges H, H. A spring J moves on a pin or screw
at one end, and may be placed under a catch K as is usual in printing frames.
A knob enables this board to be readily opened.
Fig. II shews the top board B in which there is a hole a little less than
that in the board A. The hole in B is symmetrically placed with respect to
the hole in A. The board is attached to D by means of two double hinges L L.
E is a plate of metal so arranged that by pressing it at the lowest edge the boards
can be separated.
Fig. III shows a vertical section. A and B are the two main boards.
C is the hinged back. E shews the form of the metal plate. As E rests on the
corner of D, any pressure applied at the lower end of E will tend to separate the
main boards A and B. H is the double hinge.
Fig. IV shews the frame from the side. To the lower part of A a strip D is
attached, shewn also in Fig. II, and to this is attached B by double hinges shewn
at L. L. Fig. 1. The board C is shewn partly open. The springs F, shewn also
in Fig. II tend to keep A and B in contact.
In the attachment of board A to slip D and of C to A by means of double
hinges the object is to provide means whereby the boards may accommodate them-
selves to the varying thicknesses of negatives and sensitive plates. All the
boards are covered with soft material on the faces that come into contact with glass
surfaces.
In using the apparatus, the board C is turned back and the negative is placed
between A and B, the collodion or gelatine surface being nearest A. The plate E
is pressed so that the negative can be placed in any desired position. On releasing E
the springs F, F, hold it firmly in position. The sensitive plate is now put into the
hole in A, and the board C is shut down on it.
The apparatus for cutting the masks is shewn on Sheet 2, Figs. V, VI, VII.
Fig. V shews the apparatus.
Fig. VI shews a partially vertical section.
Fig. VII shews apparatus as seen from above.
A is a conical piece of metal with the upper part cut off as shewn. From the
upper end a hole is bored about three quarters of the way down. From the under
side a hole is bored marked L. A rod of circular section marked B fits accurately
into the upper part of the cone, but is free to turn round. A screw is arranged
as shewn at L which prevents the rod B from being lifted out. A slat in B is cut
in the direction of its length and a plate C fits into it. K is a pin which passes
through rod and plate. The slat is so long that it allows the plate a little motion
in a vertical plane.
D is a rod with a slat cut in it so that it can slide along C. F is a screw by
which the rod D can be fixed in any position.
E is a cutter of steel, circular in form which fits in a slat at the lower end of D
and runs on the pin H.
The instrument is
The scale on Ĉ which is graduated to one half of real inches enables the cutter
to be easily adjusted so that any diameter of hole can be cut.
placed on the paper or other material, a slight pressure is exerted on A. by means
of B, and the rod C carrying with it rod D and the cutter E is moved round in a
horizontal plane. The cutter E cuts out the circle.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is:
1. The use of double hinges in the frame to accommodate the varying thicknesses
of glass.
2. The use of a plate of metal arranged so that by pressure the two main
boards may be separated so as to allow the negative to be easily adjusted in
position.
3. The use of a circular cutter arranged on the end of a radial arm so that it
can be moved to cut circles.
4. The use of a scale on the radial arm to adjust the position of the circular
cutter.
Dated this Twenty-sixth day of December 1892.
JAMES ROBSON RENDELL.