Improvements in Apparatus for Retouching Photographic Negatives and the like.
Year: 1896

page_text: Date of Application, 10th Dec., 1896
Complete Specification Left, 8th Sept., 1897-Accepted, 23rd Oct., 1897
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Retouching Photographic Negatives
and the like.
MORTIMER JOHNSTONE Artist 104 Queens Road Hastings do hereby declare
the nature of this invention to be as follows:-
A pencil for the purpose of retouching or stippling photographic negatives,
consisting of a metal tube or rod which carries the retouching lead moving
freely inside a surrounding casing the stipple or touch of this movable part
of the pencil may be produced by the proper attachment of a small electric bell
movement, or the intermittent attraction of an armature or armatures by suitably
arranged electro-magnets. The novelty of the invention consists in a pencil for
retouching similar in appearance and size to the pencil in ordinary use by
retouchers. A pencil to which the actuating movement adds but little in bulk or
weight. Attaching the actuating movement in such a way that the pencil may
be held in the hand in the way retouchers usually hold the ordinary pencil.
Dated this 9th day of December 1896.
MORTIMER JOHNSTONE.
COMPLETE SPECIFICATION
Improvements in Apparatus for Retouching Photographic Negatives
and the like.
I, MORTIMER JOHNSTONE 104 Queens Road Hastings 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:-
A pencil for the purpose of retouching or stippling photographic negatives
consisting of a metal tube or rod which carries the retouching lead moving
freely inside a surrounding casing. The stipple or touch of this movable part
of the pencil may be produced by the proper attachment of a small electric bell
movement, or the intermittent attraction of an armature or armatures by suitably
arranged electro magnets. The novelty of the invention consists in a pencil for
retouching similar in appearance and size to the pencil in ordinary use by
retouchers. A pencil to which the actuating movement adds but little in bulk or
weight. Attaching the actuating movement in such a way that the pencil may
be held in the hand in the same way as the ordinary retouchers pencil.
In order that my invention may be fully understood, I will now refer to the
annexed drawings, in which:-
Figure 1. is a longitudinal section shewing my invention.

page_text: Figure 2. side elevation of same.
Figure 3. longitudinal section on enlarged scale of rod carrier.
a is an outer casing in which the electro magnet consisting of a coil of wire b
and hollow core c is carried. d is the armature which carries the spring contact
piece e. f and y are two terminals to which wires for a suitable source of
electricity such as a battery are secured. g¹ is a regulating screw for the purpose
of adjusting the armature d. The course of the current is indicated by the
dotted lines h in Figure 2. The retouching point or pencil i is carried in the
rod carrier or holder j, having an adjustable nut j thereon, k being a spring
interposed between the nut j and the cap; is a rod connected to this adjustable
nut which projects through the hollow core, the end being operated by the
armature d. When this armature is vibrating by means of the regulating screw
it may be brought into contact with the end of the rod and thus give a
vibratory motion to same, and which is communicated to the rod carrier or
holder, the spring k being for the purpose of bringing the parts back to their
initial position, often having been moved in the direction of the arrow 1 by the
action of the armature.
By this arrangement it will be seen that the pencil may be held in the hand
in the ordinary way, and owing to the action of the armature a vibratory motion is
given to the retouching point or pencil i, and of course it will be understood that the
arrangement of the various parts may be modified without. departing. from the.
principle of my invention.
Gi
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is be performed, I declare that what I
claim is:
1. The retouching pencil, consisting of an outer casing carrying an electro.
magnet and adjustable armature for the purpose of giving vibratory motion to
a movable point or pencil, carried in a suitable holder.
2. The combined construction and arrangement of the various parts substantially
as described and illustrated herein.
100%
E. EATON,
Agent for Applicant.