Double Dark-slides - Antique and Vintage Cameras

Edwards' Patent

1894

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 To load the plates the inner frame is withdrawn, a hinge at the base allows the plates to be inserted, the inner frame together with the two draw-slides are returned to the outer metal frame.

References & Notes:
BP 21505/1896. 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.

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

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.

Film and Plate holders

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