Improvements in Locking Attachments for Photographic Apparatus.
Year: 1899

page_text: Date of Application, 30th May, 1899-Accepted, 1st July, 1899
COMPLETE SPECIFICATION.
Improvements in Locking Attachments for Photographic Apparatus.
We, EDWARD GRAHAM GOODELL, 91-99, Griswold Street, Dealer in Real Estate,
and WILLIAM BRADLEY HASKINS, of 500, Trombly Avenue, Mechanical Draughts-
man, both of the City of Detroit, in the County of Wayne and State of Michigan,
United States of America, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:---
Our invention has for its object a novel locking attachment for photographic
apparatus, and it consists of the construction hereinafter described and claimed
and illustrated in the accompanying drawings, in which--
Figure 1 is a view in plan showing our attachment in locked position.
Figure 2 is a partial view of the same, showing the device in unlocked position.
Figure 3 illustrates a modification, showing the attachment in locked position.
Figure 4 shows the modification of the attachment in unlocked position.
Figure 5 is a partial side elevation of the modification mentioned.
Our invention applies more particularly to photographic apparatus, in which
film rolls are used. Heretofore, amateurs have experienced difficulty in the use of
such apparatus in consequence of forgetfulness to properly rotate the film roll,
after making one exposure, in order to bring the film into proper position for a
subsequent exposure. Our invention is intended to prevent a double instantaneous
exposure or snap shot" upon the same portion of the film, our invention being
designed to provide means for locking the shutter until the film roll has been
rotated into proper position for a subsequent exposure.
**
To these ends, a photographic apparatus of any desired construction is indi-
cated at a, provided with a roller & for actuating the film roll, projecting to the
exterior of the case of the apparatus, and provided with an operating head c.
A lever for working the shutter is indicated at d. The foregoing parts may
be of any ordinary construction. The lever d is the customary oscillatory lever,
but our invention is not limited solely to photographic devices provided with an
oscillatory lever to actuate the shutter. Accordingly, in Figures 3, 4, and 5, an
ordinary press button or stem is indicated at c arranged to be depressed in a
customary manner to actuate the shutter. We would have it understood that our
invention contemplates the provision of our attachment to photographic devices
provided with any ordinary shutter actuating mechanism.
To lock the shutter actuating mechanism, we provide a dog f arranged to be un-
locked by the rotation of the roller b. Said dog may consist of a reciprocatory slide
secured upon the photographic apparatus, as by screws g, the slide being formed
with one or more elongated slots h to permit its reciprocation. The slide is formed
with a shoulder i projecting into the annular path of the head c of said roller, so
that when said roller is rotated, the head will strike against said shoulder i and
move the dog into unlocked position. A spring jkeeps the dog normally in locked
position. Where an oscillatory lever is employed to actuate the shutter, the adja-
cent end of the slide is constructed with a shoulder k, to abut against one edge

page_text: of the lever, the slide also projecting into the path of the lever to prevent its
movement. It is obvious that when the dog is in locked position, the lever d
cannot be thrown to actuate the shutter, and the slide will remain in locked
position until the roller has been rotated to withdraw the dog, and thereby bring
the film into proper position.
Where a button or stem e is used, it may be provided with a notch /, into which
the forward end of the dog normally projects to prevent the depression of the
button or stem until the dog has been moved by the rotation of the roller. The
slide may be varied in form or outline to adjust it to the location of the button or
stem relative to the roller.
Where an oscillatory lever is employed, it operates in an elongated slot m.
The dog is arranged to be withdrawn automatically by the turning of the roller,
and the shutter lever is automatically locked until said roller is actuated. The
dog may be held out of normal position by any suitable means, as by a latch n,
engagable with the rear end of the dog.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. In a photographic apparatus, the combination with shutter mechanism, and
means for actuating a film roll, of a locking device to prevent the movement of
the shutter actuated by the means for actuating the film roll, as described.
2. In a photographic apparatus, the combination with shutter actuating mechan-
ism, and a roller for actuating a film roll, of a locking device actuated by said
roller to prevent the movement of the shutter actuating mechanism, substantially
as described.
3. In a photographic apparatus, the combination with shutter actuating
mechanism, and a roller for actuating a film roll, of a locking dog to project into
the path of the shutter actuating mechanism, said dog actuated by the movement
of said roller, substantially as described.
4. In a photographic apparatus, the combination with shutter actuating
mechanism, and a roller for actuating a film roll, of a locking slide to project into
the path of the shutter actuating mechanism, and means to restore said slide to
normally locked position, said slide actuated by the movement of said roller, sub-
stantially as described.
5. In a photographic apparatus, the combination with shutter mechanism, and
means for actuating a film roller, of a locking device to prevent a movement of
the shutter, and means to hold the locking device out of locked position, said
locking device actuated by the means for actuating the film roller, substantially
as described.
6. In a photographic apparatus, the combination with a shutter actuating device,
and a roller for actuating the film roll, of a reciprocatory slide engaged upon said
apparatus and arranged to project into the path of the shutter actuating mechan-
ism, whereby said slide will be actuated by the movement of said roller, substan-
tially as described.
Dated at Detrit Michicon 41.
1000