(from Datasheet, June 1967)
These compact spotlights project a clear cut even beam of any profile determined by a cut-out mask in the gate runners. Four masks of different, but fixed apertures are provided; optional beam-shaping accessories are an adjustable straight-edge mask or an iris diaphragm.

Different lens combinations are available so that the most efficient use can be made of the light collected at the gate by the front annular and rear ellipsoidal reflectors. The Fresnel lens model, Patt 23F, provides a diffused edge to the beam.

These models are recommended for applications where precise control of beam shape and spread is required in display, exhibition and feature lighting. For stage and studio lighting, where more frequent change of beam shape is necessary, the models with externally operated beam-shaping shutters, will be found more convenient.

DOWNLOADS:

• Article from TABS, April 1953 introducing the Patt.23 to the world (JPEG)
• Diagram from TABS, September 1953 (JPEG)
• Data sheet - Patt 23 - 1967 (PDF)
• Data sheet - Patt 23N - 1967 (PDF)
• Data sheet - Patt 23S - 1967 (PDF)
• Parts list and exploded diagram (date unknown) (PDF)
• Data sheet - Patt 23 II - 1969 (PDF)
• Data sheet - Patt 23N II - 1969 (PDF)

DESIGNED BY: Morgan McLeod (from 'Sixty Years of Light Work' by Fred Bentham)

PATT. 23 PRICING: