There are many thoroughfares where some degree of colour discrimination is desirable notably promenades, civic centres or shopping areas, and it was to meet this requirement that the REVO C12122 lantern was primarily designed. The lantern comprised a combination of two standard tungsten filament lamps with a sodium lamp and satisfactory colour rendering is obtained for normal purposes. The addition of the tungsten lamps greatly enhances the general appearance of an installation and enables an exceptionally attractive and cheerful form of street-lighting to be provided at a low running cost. Effective distribution of light is obtained by means of the special arrangement of reflectors and refractors and the lanterns comply with the MOT Final Report 1937. Cast alumininium alloy one-piece canopy with substantial frame carrying patented refractor panels, the upper sections of which are clear to allow efficient transmission of reflected light; the lower portions having a prismatic formation to control the light emitted from the sodium lamp. Clear glass panels are provided for the prisms to facilitate cleaning, but may be omitted when desired. The internal reflectors are of high quality silvered glass. The tungsten lamps are accommodated in the ends of the lantern which are glazed with opalescent diffusing panels. A wiring chamber is incorporated and the lampholders are wired on separate circuits for the sodium and tungsten lamps. The lantern is supported from a cast iron dome on which it may hinge and from which it is readily detachable. Wiring from the terminal block to the lampholders is provided.

Bottom entry lantern for Group "B" lighting. The optical system consists of a one-piece Perspex envelope having a white opalescent top with the remainder clear and a white stove enamelled reflector. Alternatively, prismatic panels may be included, cemented to the inner surface of the Perspex envelope. The Control Gear is mounted above the reflector. Access to the gear tray is obtained by either of two methods :- (1) A quick release fastener enables the end cap to be easily removed and access to the interior of the fittings can then be obtained by releasing a captive knurled screw and sliding the gear tray out. A stop is provided to retain the tray in a convenient position for maintenance. (2) An alternative means of access to the gear tray is available by removing the end cap as before and then freeing two quick release fasteners which secure the envelope. Partial removal of the envelope gives direct access to the gear tray. The first method of gaining access to the gear is suitable when ladders are used for maintenance, but where a servicing tower is available, either method may be employed. Plastic bi-pin lampholders are provided and wired to a porcleain terminal block on the reflector. An earth terminal is also provided.

Post Top Mounting lantern for Group "B" lighting. Post Top for 3in. diameter or 2in. BSP spigot. Alternatively the base may be tapped ¾in. BSP for bracket mounting. The canopy is of pressed sheet aluminium and the base high quality die-cast silicon-aluminium alloy. This consists of a moulded Perspex bowl having Perspex, prismatic refractor plates cemented to its inner surface. Access to the interior of the lantern is obtained by releasing two captive knurled screws which clamp the perspex bowl to the lantern and lowering the bowl to the extent of a supporting nylon cord. Resilient gaskets are provided to ensure dust and weatherproof joints between the bowl and the canopy. A porcelain BC lampholder is wired in heat resisting cable to a porcelain terminal block. An earth terminal and cable clamp are also provided. The lantern has a stove enamelled finish. If required the lantern may be supplied with control gear for operating the lamp mounted internally on the underside of the canopy.

Side entry lantern for Group "A" lighting. The lantern is secured to the bracket by two steel clamps. The canopy is formed in resin bonded fibre glass. It is made in two parts which are bonded together to form a box section of great rigidity. This consists of a one piece Perspex bowl with Perspex refractor plates cemented to its inner surface and a white stove enamelled internal reflector. The bowl is hinged to the canopy and is secured with quick action catches. A dustproof and weatherproof seal is provided by a durable resilient gasket. The reflector is made from sheet steel, stove enamelled white. It forms a self contained unit carrying all the control gear, bi-pin lampholders and internal wiring. The whole unit is hinged to the canopy and secured by easy action catches and may be easily removed from the lantern for servicing. Revo Polyester gear is fitted and can be of either the switchstart or switchless start type. Fibre glass self colour - Black. Does not require painting.

Top or side entry lantern for Group "B" lighting. Top entry - tapped ¾in. BSP. Side entry - 1in. or ¾in. BSP plain barrel penetrating 3in. into lantern body. Body made from die-cast aluminium alloy. Satin finished aluminium reflector, patent directional lens dome refractor, or the REVO patent "Kleen Prism" dome refractor in which all the prisms are sealed with a plain glass to facilitate maintenance. A porcelain terminal block with heat resisting connections to the lampholder is provided for the supply cable. Hammered Grey stove enamel.

Top or side entry lantern for Group "B" lighting. Top entry - tapped ¾in. BSP. Side entry - 1in. or ¾in. BSP plain barrel penetrating 3in. into lantern body. Body made from die-cast aluminium alloy. Optical system made from satin finished aluminium reflector, patent directional lens dome refractor and clear glass or Perspex outer globe. A porcelain terminal block with heat resisting connections to the lampholder is provided for the supply cable. Hammered Grey stove enamel.

Top or side entry lantern for Group "B" lighting. Top entry - tapped ¾in. BSP. Side entry - 1in. or ¾in. BSP plain barrel penetrating 3in. into lantern body. Body made from die-cast aluminium alloy. Optical system made from satin finished aluminium reflector and patent directional lens dome refractor. Fitted with a vandal proof bowl. This toughened glass bowl has been specially developed to combat vandalism. The bowl is remarkably resistant to attack from stones, air-gun pellets, catapults, etc. The bowl is hinged and secured by a stainless steel toggle fastener. A neoprene gasket is included to ensure a dust and weatherproof joint between bowl and body. A porcelain terminal block with heat resisting connections to the lampholder is provided for the supply cable. Hammered Grey stove enamel.

Top or side entry lantern for Group "B" lighting. Top entry - tapped ¾in. BSP. Side entry - 1in. or ¾in. BSP plain barrel penetrating 3in. into lantern body. Body made from die-cast aluminium alloy. Bowl refractor optical system. A porcelain terminal block with heat resisting connections to the lampholder is provided for the supply cable. Hammered Grey stove enamel.