IMPROVEMENTS IN PHOTOGRAPHIC CAMERAS AND SHUTTER ARRANGEMENT FOR SAME
Year: 1885

page_text: The decision of the Chief Examiner, acting on behalf of the Comptroller, of the
30th day of December 1892, allowed, under Section 18 of the Patents, &c
Act, 1883, an Amendment of this Specification
I, GEORGE LOWDON, (optician) Reform Street, Dundee, Forfarshire, NB do
hereby declire the nature of my invention for IMPROVEMENTS IN PHOTOGRAPHIC
CAMERAS AND SHUTTER ARRANGEMENT FOR SAME to be as follows
-
The object of this invention is to procure a form of portable camera for instan-
taneous Photographic purposes, which has no loose parts, and by which, great
rapidity of erection, portability, lightness, and rigidity, are obtained also, of a
Shutter arrangement attached to lens, for the above camera
The Camera is composed of a simple frame, carrying the moveable Focusing
Glass, top, bellows body, and dark slide To this frame, I attach, (one at each side)
two thin wood sides, which, when folded out, are hinge-bound, and form a fixed
holding, for Camera front, and when in, folds above the Camera front, and bellows,
allowing the Lens to project The focusing arrangement, when required, being by
rack from below, moving the half of back of Frame, by a focus scile on side
In the Lens, as used with this Camera 1 replace the usual revolving diaphragm,
with a one-holed, or slited disc, or, a seperate cut may be made in the metal
setting of any lens, so used, and this disc employed To move this disc, 1 place
round the body of the lens, a special steel, or other spring, one end being fixed to
lens setting, the other, to a pin, on the revolving disc This spring is adjustable
for slow, or quick exposures, by a sliding ring
Doted this thirtieth day of March 1885

page_text: Arrangement for same
I, GEORGE LOWDON Reform Street Dundee in the county of Forfar, Optician do
hereby declare the nature of my invention for IMPROVEMENTS IN PHOTOGRAPHIO
CAMERAS AND SHUTTER ARRANGEMENTS FOR SAME and in what manner the same
is to be performel, to be particularly described and ascert uned in and by the
following statement
The object of this invention is to produce a photographic Camera and Lense in
portable shape for instantaneous work
Figure 1 is a front view open
Figure 2 is a front mew c'osed
Figure 3 is a side view open
Figure 4 is a top vieir open
Figure 5 is a side view closed
Figure 6 is a top view closed
The invention consists of a simple framework, composed of the frame A the two
thin wood sider B B, and the camera tront D, the wood sides B, B being attached
by hinges C to the frame A, so that when folded o it they are hinge-bound and form
a fixed holding for the camera front, as shown at fig 3 This framework is held in
rigidity by the tension of the bellows body when extended, and the action of the
sides Band is collapsable by the front being relieved by the finger and thumb
of the operator The two supporting sides are placed on top of front when folded
down as at Fig 2 5 & 6 The pont has projections E which fit the notches F F
on the sides
Into the Lens as adapted for this Camera I place a revolving diaphragm having
one opening this diaphragm shown as at Fig 1-e is kept shut by means of a
spring b coiled round body of Lens A: projecting pin a on diaphragm' to which
one end of the spring attached enables the operator to move; this diaphragm back
until spring is at its greatest tension b Figure 1, where it is held back by a suitable
catch c so making it ready for use In holding the Camera & the small catch on the
diaphragm c is touched with the finger when the diaphragm revolves and gives
the exposure
This spring has travelling catch or sliding ring on Lensid which
carries a cat h h to requlate the free length of the spring b, so enabling the spring to be
adju ted to act at varying rates of speed as it is set or required
What I claim is
(1) A rigid folding Camera without any springs as shown in Fig 3
(2) An instantaneous shutter applied to Lense of Camera revolving in the part
Occupied by the ordinary savalının dre
L

page_text: I, GEORGE LOWDON, (optician) Reform Street, Dundee, Forfarshne, NB do
hereby declare the nature of my invention for IMPROVEMENTS IN PHOTOGRAPHIC
CAMERAS AND SHUTTLR ARRANGEMENT FOR SAME to be as follows
-
The object of this invention is to procure a form of portable camera for instan-
taneous Photographic purposes, which has no loose parts, and by which, great
rapidity of erection, portability, lightness, and rigidity, are obtained also, of a
Shutter arrangement attached to lens, for the above camera
The Camera 19 composed of a simple frame, carrying the moveable Focusing
Glass, top, bellows body, and daik slide To this frame, I attach, (one at each side)
two thin wood sides, which, when folded out, are hinge-bound, and form a fixed
holding, for Camera front, and when in, folds above the Camera fiont, and bellows,
allowing the Lens to project The focusing arrangement, when required, being by
rack from below, moving the half of back of Frame, by a focus scale on side
In the Lens, as used with this Camera I replace the usual revolving diaphram,
with a one-holed, or slited disc, or, a seperate cut may be made in the metal
setting of any lens, so used, and this disc employed To move this disc, I place
round the body of the lens, a special steel, or other spring, one end being fixed to
lens setting, the other, to a pin, on the revolving disc This spring is adjustable
for slow, or quick exposures, by a sliding ring

page_text: Arrangement for same
I, GEORGE LOWDON Reform Street Dundee in the county of Forfar, Optician do
hereby declare the nature of my invention for IMPROVEMENTS IN PHOTOGRAPHIC
CAMERAS AND SHUTTER ARRANGEMENTS FOR SAMF and in what manner the same
1s to be performed, to be particularly described and ascertained in and by the
following statement
-
The object of this invention is to produce a photographic Camera and Lense in
portable shape for instantaneous work
The invention consists of a simple framework, as shown at fig 3 held in rigidity
by the tension of the bellows body when extended, and collapsable by the front
being relieved by the finger and thumb of the operator The two supporting bides
are placed on top of front when folded down as at Fig 2 5 & 6
Into the Lense as adapted for this Camera I place a revolving diaphragm having
one opening this diaphi am shown as at Fig 1,-e is kept shut by means of n
spring coiled round body of Lense A projecting pin a on diaphragm enables the
operator to move this diaphragm back until spring is at its greatest tension b so
making it ready for use In holding the Camera a small catch on the diaphragm c
is touched with the finger when the diaphiam revolves and gives the exposure
This spring has a travelling catch or ring on Lense d enabling the sping to act at
varying rates of speed as it 18 set or required
What I claim is
(1) A rigid folding Camera without any springs as shown in Fig 3
101 An instantaneous shutter annlied to Lense of Camera revolving in the part
What I claim is
(1) A rigid folding Camera without any springs as shown in Fig 3
(9) An instantaneous shutter applied to Lense of Camera revolving in the part
occupied by the ordinary revolving diaphragm
(3) The adjustable spring by which the diaphragm is moved