Improvements in Photographic Cameras.
Year: 1890

page_text: Date of Application, 11th Nov,
1001 Accepted, 12th Sept., 1804
Date of Application, 11th Nov,
1001-Accepted, 12th Sept.,
Του
Date of Application, 11th Nov,
1001-Accepted, 12th Sept.,
Complete specifion
PROVISIONAL SPECIFIC
Improvements in Photographic Cameras.
I, WALTER PALMER of Westfield, Reading in the County of Berks, Gentleman,
o hereby declare the nature of this invention to be as follows:-
The object of my invention is to provide an improved photographic camera
whereby the focussing may be very rapidly and conveniently effected the arrange-
ment being such as to ensure the requisite rigidity of the camera in all positions.
According to my invention 1 screw or otherwise mount the lens or lenses in a
part to which are attached the outer ends of a system of "lazy-tongs" the inner or
opposite ends of which lazy-tongs are connected to the back part or body of the
camera in order to guide the lazy-tongs in their motion and secure the proper
rigidity, whatever may be the position to which they are adjusted, I provide frames
constituting guides along which run guiding blocks or other bearings to which the
adjacent outward ends of the rods of the lazy-tongs are jointed or otherwise
connected. When the front of the camera is pulled out the frames or guides move
forward with the extending lazy-tongs and when the front is moved backwards the
5 frames or guides also move backwards with the lazy-tongs the guide block or
bearings in each case running along the said frames or guides. The lazy-tongs
have (within or without them or both) a non actinic or light-proof casing or covering
capable of expanding and contracting with the movement of the said lazy-tongs.
The frames or guides and the bars of the lazy-tongs are preferably but not
20 necessarily made to decrease in size as they are situated nearer to the lens or lenses
so that when moved back the arrangement will lie compactly against the back or
body of the camera.
The expanding and contracting system of lazy-tongs and their frames or guides
may be arranged to carry two lenses or sets of lenses and be connected with a double
25 or stereoscopic back the one for focussing and the other for the negative so that
focussing and view finding are done by the same movement.
In combination with the camera lens or lenses I may provide an auxiliary
focussing lens or lenses and apparatus which may be fixed to any convenient par
of the camera frame the said auxiliary lens or lenses and apparatus being if s
30 desired operated from the lazy-tongs so that the camera lens or lenses will b
simultaneously adjusted with the focussing lens or lenses and the use of a focussin
cloth may in that case be dispensed with.
35
The frame of the camera may be fitted with a tube so as to form a socket and
universal joint for the connection for the camera to a tripod.
When used for instantaneous work the tripod may be dispensed with, it bei
convenient, in some cases to hold the camera or where space is limited, to supp
tus on the knees in any other suitable support.
bor 1890.
INSON & CO.,
bor 1890.
YO
OHNSON & CO.,
J. H. JOHNSON
London, W.C., Agents.
47, Lancom
COMPLETE SPECIFICATION.
Improvements in Photographic Cameras.
I, WALTER PALMER of Westfield, Reading in the County of Berks, Gentleman,
do hereby declare the nature of my said invention and in what manner the same
is to be performed to be particularly described and ascertained in and by the
statement :-
is to provide an improved photographic camera

page_text: whereby focussing may be very rapidly and conveniently effected the arrangement
being such as to insure the requisite rigidity of the camera in all positions.
According to my invention I screw or otherwise mount the lens or lenses in a
part to which are attached the outer ends of a system of "lazy-tongs" the inner
or opposite ends of which lazy-tongs are connected to the back part or body of the
camera. In order to guide the lazy-tongs in their motion and secure the proper
rigidity, whatever may be the position to which they are adjusted, I provide frames
constituting guides along which run guiding blocks or other bearings to which the
adjacent outward ends of the rods of the lazy tongs are jointed or otherwise
connected. When the front of the camera is pulled out the frames or guides move
forward with the extending lazy-tongs and when the front is moved backwards the
frames or guides also move backwards with the lazy-tongs the guide block or
bearings in each case running along the said frames or guides. The lazy-tongs
have (within or without them or both) a non-actinic or light-proof casing or
covering capable of expanding and contracting with the movement of the said lazy
tongs. The frames or guides and the bars of the lazy-tongs are preferably but not
necessarily made to decrease in size as they are situated nearer to the lens or lenses
so that when moved back the arrangement will lie compactly against the back or
body of the camera.
The expanding and contracting system of lazy-tongs and their frames or guides
may be arranged to carry two lenses or sets of lenses and be connected with a double
or stereoscopic back the one for focussing and the other for the negative so that
focussing and view finding are done by the same movement.
In combination with the camera lens or lenses I may provide an auxiliary
focussing lens or lenses and apparatus which may be fixed to any convenient part
of the camera frame, the said auxiliary lens or lenses and apparatus being if so
desired operated from the lazy-tongs so that the camera lens or lenses will be
simultaneously adjusted with the focussing lens or lenses.
And in order that my said invention may be fully understood I will now proceed
more particularly to describe the same and for that purpose shall refer to the
several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all the figures.
The drawings shew a photographic camera provided with a system of lazy-tongs
and their frames and guides according to my invention the said camera being
provided with two lenses and with a double or stereoscopic back but I do not
confine myself to this particular arrangement as my invention may be applied
generally to photographic cameras with collapsible sides.
Figure 1 is a front elevation of the camera in the closed position.
Figure 2 is a section of the same through the centre of one of the lenses and
Figure 3 is a plan shewing the camera opened and the dark slide in position.
To a front A in which are mounted the lense tubes B B are attached by means of
hinged joints a the outer ends of a system of lazy tongs C the inner or opposite
ends of which lazy-tongs are attached by means of hinged joints d to the back part
or body of the camera D.
Fare frames to give proper rigidity to the system of lazy tongs. Each frame
may be composed of four rods as shewn in the drawings the rods being rigidly
connected together by corner blocks f2. The said frames constitute guides along
which run guiding blocks f (Figure 2) to which blocks the adjacent outward ends
of the bars of the lazy-tongs C are connected by pins or pivots.
When the front A of the camera is pulled out the frames or guides F move
forward with the extending lazy-tongs C and when the front is moved backwards
the said frames or guides also move backwards with the lazy tongs the bearings in
each guiding block running along the rods of the said frames or guides.
A non-actinic or light proof casing H is within the lazy-tongs in the arrange-
ment illustrated in the drawings but it may be arranged outside the said lazy-tongs
or both within and without. In the drawings I have shewn the rods of the frames
or guides and the bars of the lazy-tongs decreasing in size as they are situated

page_text: nearer to the lens so that when moved back for closing the camera, the lazy tongs
will lie compactly against the back or body of the said camera as shewn in
Figures 1 and 2.
-
A handle J may be secured to the upper side of the back D of the camera for
carrying it or holding it when in usc.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In photographic cameras, the combination with lazy-tongs of frames or supports
constituting guides for the lazy-tongs to keep them practically rigid in all positions
substantially as hereinbefore described.
2. In photographic cameras the combination of tapering series of lazy-tongs C,
connected at the smaller end to the front part carrying the lens or lenses B and at
the larger end to the back part D and frames F on which run guide-blocks f to
which the members of the lazy-tongs are centred substantially as and for the
purpose hereinbefore described and illustrated in the accompanying drawings.
Dated this 2nd day of July 1891.
WALTER PALMER.