Kershaw Patent - Antique and Vintage Cameras

Kershaw Patent

1885

Early Model

John Kershaw

Buxton

England

Image of Kershaw Patent Early Model

Shutter Type:
Roller-blind, single blind. Spring powered, tension varies exposure.

Attributes:
The blind is marked D and U for not set and set respectively.

This is an early roller-blind shutter, the blind is wound to the top roller in the shutter by a cogwheel, when released the blind is pulled by a spring in the lower roller, the spring tension can be varied by a ratchet and pawl mechanism. The basic design was copied by many manufacturers especially Thornton-Pickard.

The shutter was improved in 1890 by the addition of a Time setting.

John Kershaw, the patentee of the shutter, was a photographer operating studios in Buxton. It is not certain that the shutter was manufactured by the Kershaw family but given that the two sons of John Kershaw describe themselves in the census as shutter manufacturers it seems probable that this was a sideline carried out along with their studio business. J.T. Chapman advertised the shutter in 1886. Not many shutters could have been produced as they are not often seen today.

References & Notes:
BP 5014/1885. BJP 18/4/1890, p. 251.

Kershaw Patent

1885

Early Model

Details as above.

N&G Roller-Blind

1892

Early Model

Newman & Guardia

London

England

Image of N&G Roller-Blind Early Model

Shutter Type:
Roller-blind, single blind. Spring powered, pneumatic regulation.

Attributes:
Speeds 1/50 - 1, T (by short pressure on release). Front of lens fitting.

Serial Number:
125 .

This is a roller-blind shutter with the unusual feature of being regulated by a pneumatic delay. The upper spindle has attached to it a pinion, this works within a rack the bottom of which is connected to the piston of the delay cylinder.

The early models showed the speeds on a quadrant-shaped scale, later an arm along the lower edge of the shutter was used.

The shutter is robust and works well. It was not given much emphasis in N&G advertisements and did not sell in large numbers.

References & Notes:
BP 5742/1892. BJA 1893, p. 418. BJA 1899, p. 138.

Kershaw Patent

1891

Stereo Model

Image of Kershaw Patent Stereo Model

Shutter Type:
Roller-blind, single blind. Spring powered, tension varies exposure.

Attributes:
Speeds 5 - 20. Variable lens separation.

Identification:
French inscriptions.

This patent included the use of a worm wheel to display the speeds. The mechanism is an improvement on Kershaw's earlier roller-blind patents.

References & Notes:
BP 10798/1891.

Guerry Flap Shutter

Phoenix

Rotary

Unnamed Studio Shutter

Idento Sector

N&G Sector

Lancaster See-Saw

Sands' Patent

Simplex

Nydia

Newman's Patent

Sarjeant

The Adjustable

Single blade Return

Linhof

Le Perpetuel

Ilex

Derval, Vario, Nettar

Victor, Unicum, Argos
Automat, I T B

Regular, Junior
Trichro, Eastman Triple Action

Compound

Compur

Koilos

Ibso

Automat, Ilex, Ilex Acme
Ball Bearing, Kodamatic

Luc, Agilux
T-P Gun Camera

B&L Iris, Goerz Sector, Volute
Pocket Automatic

T-P T&I

T-P Time, Studio, Snap-Shot
T-P Stereo, Extra Rapid

Kershaw Patent

N&G Roller-Blind

Roller-Blind

T-P Focal-Plane

N&G Focal-Plane

Minex

Eye-lid