Newman's Patent - Antique and Vintage Cameras

Newman's Patent

1886

Newman & Simpson

London

England

Image of Newman's Patent

Shutter Type:
Single blade return. Spring powered. Pneumatic regulation.

Attributes:
Speeds 1/100 - 1. Between the lens fitting. Pneumatic release.

Notes:
Retailer's plaque: Walter Lawley. 78 Farringdon St. London.

Newman's Patent

Shutter Type:
Single blade return. Spring powered. Pneumatic regulation.

Attributes:
Speeds 1/50 - 2s. Between the lens fitting. Pneumatic release.

Notes:
Retailer: London Stereoscopic Co. Ltd. 110 & 108 Regent St. 54 Cheapside.

Newman's Patent

Improved Model

c. 1891

Newman & Guardia

London

England

Shutter Type:
Single blade return. Spring powered. Pneumatic regulation.

Attributes:
Speeds 1/100 - 1. Between lens fitting. Pneumatic release.

Serial Number:
392 .

The shutter is wound by rotating a knob on the front of the shutter which tensions a coiled spring. As the spring is wound a plate attached at its centre rotates, to one end of the plate is a connecting rod that runs to the piston of the delay cylinder. Also attached to the piston is a rod that connects to the shutter blade. The rotation of the spring pushes the connecting rod into and out of the cylinder (setting the shutter takes the piston and shutter blade through a complete cycle). When the shutter is released the spring unwinds causing the blade to lift and then descend. A valve at the top of the cylinder regulates the escape of air and so the exposure. Motion of the blade is roughly uniform throughout the exposure. The Improved model differs in setting the speed by a pointer against a scale. The Original had the speeds shown on a cap at the top of the cylinder. The shutter was made in several sizes the smallest had speeds to 1/100, larger models had speeds up to 1/50 or 1/32.

References & Notes:
BP 7156/1886. BJA 1888, p. 624.

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