DE403581C - Removable cover plate on the back of photographic roll film cameras - Google Patents

Description

GERMAN EMPIRE

ISSUED
ON OCTOBER 4, 1924

REICH PATENT OFFICE

PATENT LETTERING

- M 403581 CLASS 57a GROUP

(C ₃ 3754 VII57 &)

Gontessa-Nettel A. G. in Stuttgart.

Removable end plate on the back of photographic roll film cameras. Patented in the German Empire on July 12, 1923.

It is already known; to attach a removable end plate to photographisdheji roll film cameras in order to be able to clean the rear objective lenses after the film has been removed from its slideway, whereby the end plate prevents unwanted detachment. ¹ a bolt is secured. In order to avoid the attachment of a special visor in such cameras, according to the invention, the bolt securing the plate is designed as a visor.

The device according to the invention is shown in the drawing. It show t

Fig. Ι a plan view of the rear wall of the camera with coupled end plate,

Fig. 2 the rear wall of the camera with coupling openings and abutments,

Fig. 3 is a rear view of the final

plate, partly perforated with decoupled visor,

Fig. '4 a central longitudinal section through Fig. I. "

The Karaerarüdkwand α is provided in a known manner with an opening a ¹ , the recesses a ² for coupling parts b of the end plate j b ¹ has. By turning the closing plate b ¹ lie down

ίο the coupling parts b on the stops Φ on the rear wall of the camera. When this is done, the launcher plate BP is for securing the roll film camera back α designed as a visor latch pushed inward c ,.

This engages with a projection c ¹ in a recess a ^{4 of} the camera rear wall, so that an unintentional displacement of the end plate is prevented. The same securing of the closing plate takes place,

ao when the bolt is pulled out so far that it is brought into the appropriate position for aiming the object. The approach c ¹ again engages in a further recess a ⁵ located opposite the recess β ⁴ . If the closure plate b ^{3 is to be} removed from the camera rear wall, the bolt c is only partially pulled out of the closure plate. The closure plate can then be rotated until the coupling parts b coincide with the recesses a ² , so that they slide through them when the plate for ^{1 is} removed.

Claims (1)

Patent claim: Removable end plate on the back of photographic roll film cameras, characterized in that a locking plate securing the end plate in its upper position "Latch is designed as a visor. Jbi.i. 2 T β> ά