Z.5315/6/7. Concial reflector lantern. Sectional scale drawing. The Polar Curves of the Z.5045N lantern are based on an average lamp light output through life from a 100 watt OSRAM lamp (1,197 lumens). 100 w. Directional intensity ratio 3.2 Light above horizontal 5% Light output ratio 80%

CONICAL AND OPEN "WEMBLEY" LANTERNS Z.5045/6/7N "WEMBLEY" lantern.

Side Street Lighting - Conical and Open "Wembley" Lantern.

Use Side road lighting; mounting height 13ft. - 15ft.; spacing 100 ft. - 120 ft.; road width up to 30 ft.

Lamp

Mounting Top entry, the lantern being tapped ¾ in. ga and locked to the bracket by a ¼ in. Allen type grub screw.

Lantern Body Die-cast light alloy. The Z.5315 and Z.5045 range have the same body. The outer reflector is 12 in. in diameter. The Z.5055 has a similar body but has a 10 in. outer reflector. A lantern with sloping side entry body is in production, Cat. No. Z5065/6/7. An earthing screw is provided.

Lampholder The lampholder can be BC or ES for use with an OSRAM lamp or three-slot BC for use with an OSRAM H.P.M.V. lamp.

Focusing The lampholder is mounted on a movable bridge which slides on two vertical rods. One is marked with the correct focal position for the various wattages of lamp which can be used.

Optical System
The Z.5315/6/7 lantern has a conical reflector only which is held in position by three screws and is white enamelled.

The Z.5045/6/7 and Z.5055/6/7 are the simplest form of small "Wembley" lantern available and can be supplied with three different types of dome refractor which give three forms of light distribution.

(1) Symmetrical all round distribution with Z.6502 (reference letter "S") dome refractor. (2) 160 deg. Non-axial asymmetric, main light output up and down the street just away from the kerb with a Z.6508 (reference letter "N") dome refractor. (3) Axial asymmetric main light output directly up and down the street with Z.6514 (reference letter "A") dome refractor.

Note: The reference letter for the type of light distribution required must be quoted after the catalogue number of the lantern.

The dome refractor held by three spring supports from a white enamelled reflector.

Conversion It is possible to change the Z.5315/6/7 series to Z.5045/6/7 with a conversion set consisting of reflector plate, spring supports and dome refractor.

Weathering Finish The light alloy is spcially selected for its resistance to corrosion. Further protection is obtained by the use of a suitable primer, undercoat and matt aluminium top coat.

Erection Instructions Full erection and focusing instructions are packed with each lantern.

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