Improvements in or connected with Photographic Came:
Year: 1896

page_text: Date of Application, 12th Oct.,
1896
OVISIONAL SP.
ICATION.
Improvements in or connected with Photographic Came: as.
I, WILLIAM TYLAR, of High Street, Aston, near the City of Birmingham,
Photographic Apparatus Manufacturer, do hereby declare the nature of this my
said invention to be as follows:-
This invention relates to improvements in or connected with photographic
cameras part of which improvements are applicable to collapsible cameras, and
part to cameras in general.
Its object is primarily to provide in connection with collapsible cameras, the
combination therewith of a box like front having formed therein the "finders"
or "finders"; also improved means whereby the said front is supported in its
extended position; also an 'improved arrangement of speed adjustment of the
revolving shutter; and also improved means upon the plate slide whereby a record
number is printed upon the negative.
The collapsible camera consists principally of two parts, viz. the body or rear
part, and front part which latter carries the view finders, the lens and the
revolving shutter. The body part consists of a box like form into which the front
part may freely pass so as to nearly or completely lie therein. These two parts
are connected to each other by a bellows after the usual manner, and further are
provided with slotted side plates which are jointed to the inside of the body and
their slots engaging with pins upon the exterior of the sides of the front part, in
such a manner that the said front is limited in its extension by the said slots.
Upon the interior of the body and near its rear, and upon each side I now provide
a hinged strut, which, when the front is extended may be turned up so as to pass
underneath a bracket or other projection at the rear part of the front casing and
thus support it tightly at its full stretched position. In its collapsed condition
these struts lie flatwise across each other. This front casing permits of arranging
at the corner, the "finder" device or in some cases I prefer to place one of such
devices at each side so that one will permit of using the camera horizontally and
the other vertically.
Referring to the speed adjustment upon the revolving shutter:-Such shutter
consists broadly of a front plate having a central sight hole. Upon this plate is
a revolving plate or shutter having an opening through which light may pass
to the sight hole.
This shutter is constantly held back to its normally closed position by means
of a spring. Around the edge of the shutter I make a number of notches or teeth
into which may engage the forward end of a lever pivoted upon the sight plate.
If the shutter be pulled around until the lever catches the first notch and be then
released and the speed at which it travels back to rest noted, it will follow that
if drawn further around to either of the successive notches and released the speed
at which it will travel back to rest, will be correspondingly successively greater
by reason of the increase of tension upon the spring. Hence any one of the various
speeds may be adopted. Again. Upon the shutter I provide a sliding time stop

page_text: which consists of a bridge like formation at its front end which acts in conjunc-
tion with a peg fixed upon the fore end of the aforesaid lever in such a manner as
that when pushed inwards, the shtitter may be drawn around (backwards) by
reason of the bridge opening pressing over the peg upon the lever. When however
the lever is lifted so as to release the shutter, the peg is thereby moved outwards
so that the side of the bridge-in its movement with the returning of the shutter
-now comes in contact therewith, and the shutter is arrested at "sight" as long
as the lever is thus held. Upon loosing the latter the shutter continues to return
and closes at rest. On the other hand if the bridge is drawn outwards, its
opening occupies a position fair with the peg upon the lever, when the latter is
lifted; hence the shutter can travel instantaneously right home to its normally
closed position.
I further provide in the frame of the dark slide-at one or more of the corners-
a corner plate which is perforated with a number or letter so that the exposure
for the picture shall also print the said number or letter as a. record. Hence when
a number of slides are used, and an index of their subjects taken at each exposure,
such negatives will be numbered accordingly, by the light passing through the
perforated letters and impressing the image on the sensitive plate.
Dated this 10th day of October 1806
CHARLES T. POWELL,
Applicant's Agent.
1 WILLIAM TYLAR, of High Street, Aston, near the City of Birmingham,
Photographic Apparatus Manufacturer, do hereby declare the nature of this in-.
vention 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 improvements in or connected with photographic
cameras, part of which improvements are applicable to collapsible cameras, and
part to cameras in general.
Its object is primarily to provide in connection with collapsible cameras, the
combination therewith of a box like front having formed therein the "finder"
or "finders"; also improved means whereby the said front is supported in its
extended position; also an improved arrangement of speed adjustment of the
revolving shutter; and also improved means upon the plate slide whereby a record
number is printed upon the negative. As will be seen the two latter objects apply
to cameras in general.
In order to more clearly explain this my invention, 'I have appended hereunto
an illustrative drawing upon which are figures and numbers of reference, similar
numbers referring throughout the several views to the same thing or part.
Fig. 1, shows a front view of a camera constructed according to this my
invention.
Fig. 2, is a plan view, and Fig. 3, a side view of the said camera, showing the
same in its opened position.
Fig. 4, is a plan view showing the said camera closed.
Figs. 5 and 6 are detailed views of the revolving shutter as hereinafter explained.
Figs. 7 and 8, are detailed views showing certain parts of the shutter as herein-
after explained..
-Fig. 9 is a general view of the plate slide or holder, showing the record device.
The collapsible camera as shown in Figs. 1 to 4 inclusive, consists principally

page_text: of two parts, viz. the body or rear part 11, and front part 12, which latter carries
the lens and the revolving shutter. The body part consists of a box like
form into which the front part may freely pass so as to nearly of
completely lie therein, as seen in Fig. 4. These two parts are con-
nected to each other by a hellows 13, and further are provided with
slotted side plates 14, which are jointed to the inside of the body
and their slots engaging with pins 15, upon the exterior of the sides of
the front part, in such a manner that the said front is limited in its extension by
the said slots, all after the usual manner. Upon the interior of the body and near.
its rear, and upon each side I now provide a hinged strut 16, which, when the
front is extended may be turned up so as to pass underneath the bracket 17, or.
other projection at the rear part of the front casing and thus support it tightly.
at its full stretched position, see Fig. 1. In its collapsed condition these struts
lie flatwise across each other, as seen in dotted lines in Fig. 4.
At the forward corners of the front casing 12, I now make one or both of the
"finders" 18 and 19, the one to suit the camera in its horizontal position and
the other to suit the vertical position.
Referring to the speed adjustment upon the revolving shutter, See Figs. 1, 3,
5, 6, 7 & 8-Such shutter consists broadly of a front plate 20, having a central.
sight hole 21. Upon this plate is a revolving plate or shutter 22, having an
opening 23, through which light may pass to the sight hole.
This shutter is constantly held back to its normally closed position by means
of a spring 24. Around the edge of the shutter I make a number of notches or
teeth 25 into which may engage the forward end of the lever 26, pivotted upon the
front or sight plate 20. If the shutter be pulled around until the lever catches the
first of the notches 25, and he then released, and the speed at which it travels
back to rest, noted, it will follow that if drawn further around to either of the
successive notches and released, the speed at which it will travel back to rest,
will be correspondingly successively greater by reason of the increase of tension
upon the spring 24. "Hence any one of the various speeds may be adopted. The
lever 26, is kept up to its work by spring 27. 28, is a stop fixed upon the plate 20,
whose one end serves as a stop to the spring 27, whilst its other end serves as
a stop to the outer end of the lever 26.
Again. Upon the shutter 22, I provide a sliding time stop 29, which consists
of a bridge like formation at its front end which acts in conjunction with a
peg 30, fixed upon the fore end of the aforesaid lever 26, in such a manner as that
when the stop 29, is pushed inwards, as seen in Fig. 7, the shutter may be drawn
around (backwards) by reason of the bridge opening 31, passing over the peg 30,
upon the lever 26. When however the lever is lifted so as to release the shutter,
the peg 30, is thereby moved outwards (from the centre of shutter) so that the
side of the bridge 31, see Fig. 8,-in its movement with the returning of the
shutter now comes in contact therewith and the shutter is arrested at "sight"
as seen in Fig. 5, as long as the lever is thus held. Thus the exposure may be
continued as long as may be desired, but upon loosing the lever the shutter con-
tinues to return and closes at rest, as seen in Fig. 1, with the piece 29, resting
against the stop 32. On the other hand, if the bridge 29, is drawn outwards, as
seen in Fig. 6, its opening 31, occupies a position fair with the peg 30 upon the
lever 26, as may be seen in Fig. 7, when the latter is lifted free of the teeth 25,
hence the shutter can travel instantaneously right home to its normally closed
position.
Referring to Fig. 9, I further provide in the frame of the dark slide 33-at
one or more of the corners (or other convenient position) a corner plate 34, which
is perforated with marks or numbers or letters, so that the exposure for the pie-
ture shall also print the said 'marks or numbers or letters. In Fig. 9, I have
shown three perforations 35, and it will be readily understood that a series of such
slides may have successively one, two, three, and so on, and thus when a number
of slides are used, and an index of their subjects taken at each exposure, auch

page_text: negatives will be numbered accordingly, by the light passing through the per-
forated letters and impressing the image on the sensitive plate.
Having now particularly described and ascertained the nature of this my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. In photographic collapsible cameras, the combination with the front part 12,
of a "finder" or finders 18 and 19, constructed and arranged substantially as set
forth and shown.
2. In photographic collapsible cameras the combination with the body part 11,
and front part 12, of the struts 16, substantially as described and shown, and
for the purpose specified.
3. In photographic cameras the combination with the sight plate 20, and
revolving shutter 22, with opening 23, and spring 24, of the successive circum-
ferential notches 25, with lever 26 constructed and operating substantially as
shown and described and for the purpose specified.
4. In photographic cameras the combination with the plate 20, having sight
hole 21, and with the revolving shutter 22, having the opening 23, and spring 24,.
and teeth 25, of the adjustable stop 29, having opening 31, with lever 20, having
the peg 30, all substantially as set forth and shown, and for the purposes specified.
5. The combination with the plate slide frame 33 of the printing device 34,
having index marks substantially as set forth and shown and for the purpose
specified.
Dated this 10th day of July 1897
CHARLES T. POWELL,
12 Cherry Street, Birmingham. Applicant's Agent.