Double Dark-slides - Antique and Vintage Cameras

Edwards' Patent

1893

B.J. Edwards & Co.

London

England

Image of Edwards' Patent

Construction:
Block form. Metal, celluloid draw-slide.

Format:
3 " x 4 ".

This plate holder has an inner removable frame. To load the plates the inner frame is withdrawn, a hinge at the base allows the plates to be inserted, the inner frame together with the two draw-slides are returned to the outer metal frame. The draw slide is red on one side and black on the other, the red side is to indicate an exposed plate, exposure notes can also be written on the slide.

References & Notes:
BP 21505/1896. BJP 3/11/1893 p. 707. BJA 1894, p. 788. BJA 1900, p. 1151. The Photogram 1894, p. 94.

Lancaster's Patent

1893

J. Lancaster & Son

Birmingham

England

Construction:
Block form. Celluloid draw-slide.

Format:
3 " x 4 ".

The patent refers to a slide made of metal, this example is made of wood but has the catch to the top of the slide shown in the patent.

References & Notes:
BP 5828/1893. BJA 1894, p. 446.

Wooden Block Form

Format:
2 " x 1 ⅝".

Notes:
For a microscope or scientific camera.

Lancaster Book Form

J. Lancaster & Son

Birmingham

England

Construction:
Polished mahogany with brass binding.

Format:
3 " x 4 ".

Book Form

Marion & Co. Ltd

London

England

Construction:
Polished mahogany.

Format:
5 " x 3 ".

Stereo Book Form

Format:
3 " x 6 " plates.

Notes:
Early dark-slide of dark mahogany.

Stereo Book Form

Format:
3 " x 6 " plates.

Notes:
Early dark-slide possibly for paper negatives. Spanish mahogany.

Vergara Patent

1886

Vergara Film Co.

London

England

Image of Vergara Patent

Dark-slide for film. A single sheet of double length film is wrapped around a central sheath, the sheath slots into the bottom of the dark-slide, the film is gripped by pins at the top edge of the slide.

Format:
6 " x 8 ".

Slides intended for use only with film are unusual. This example is much thinner than a conventional slide but the film could not have been held particularly flat. The film sold for use with the slide had a hardened bichromated gelatine base (Froedman's patent) which pre-dated the common use of nitro-cellulose.

References & Notes:
BP 2390/1886.

Metal Book Form

1914

Newman & Guardia Ltd

London

England

Image of Metal Book Form

Construction:
Brass frame, nickel draw-slide.

Format:
2 " x 3 ".

The N&G slides of this type were available in 2 " x 3 " and 4.5 x 6 cm sizes for the Sibyl and Folding Reflex models. A number of minor variations exist:

  • Brass frame, nickel draw-slide with catches to lock it in place.
  • Brass frame, nickel draw-slide without catches.
  • Aluminium frame, nickel draw-slide.
  • Aluminium frame, aluminium draw-slide.

References & Notes:
BJA 1915, pp. 78, 556.

Wooden Block Form

Construction:
Tropical finish, celluloid draw-slide.

Format:
2 " x 3 ".

References & Notes:
Dark-slides.

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