Z.8134SC. "Wembley" top entry with levelling body, symmetric dome refractor and clear outer globe. Sectional scale drawing of Z.8134 levelling top entry "Wembley". The iso-candle is based on an average lamp light output throughout life from a 500 watt vee filament OSRAM lamp (7,485 lumens) in a "Wembley" lantern. 300 w. 500 w. Directional intensity ratio 3.4 3.7 Light above horizontal 10% 10% Light output ratio 75% to 80%

UNIVERSAL "OXFORD" & "WEMBLEY" LANTERNS Z.8134SB. "OXFORD" top entry with levelling body. Hinged cup opened to show terminal block and umbrella weathering.

Universal "Oxford" And "Wembley" Lanterns.

Use Main road lighting; 25 ft. mounting height; spacing 120-150 ft; road width up to 40 ft.

Levelling Top A levelling top on the ball and socket principle is provided on the Z.8134 and Z.8137 body. This enables small variations from the vertical of the lantern to be corrected.

Lantern Body Die-cast light alloy. The body consists of a main bell-shaped casting containing the focusing gear and lampholder. On the top of the body a small "umbrella" shaped casting protects the weathered cable entry and porcelain terminal block from water drip. This "umbrella" and the terminal block are enclosed by a hinged cap which is secured by two fixing bolts to the main body. Two toggle action catches, one of which acts as a hinge, support the outer over-reflector which holds the bowl refractor. An earthing screw is provided.

Lampholder G.E.S. porcelain holder wired to the terminal block with heat-resisting wire. An anti-vibration mounting can be provided.

Focusing The lampholder is mounted on a bridge which is carried on two vertical pillars. A spring-loaded catch ensures that the bridge is locked into the correct focal position for the type of lamp in use.

Optical System
Wembley form. Three forms of light distribution are available, dependent upon the type of dome refractor in use:-
(1) Symmetric, giving all-round distribution Z.6504 (reference letter "S") dome refractor. (2) 160 deg. non-axial asymmetric, giving main light output up and down the street just away from the kerb with Z.6510 (reference letter "N") dome refractor. (3) Axial asymmetric, providing light output directly up and down the street with Z.6516 (reference letter "A") dome refractor.

The dome refractor is held by three spring supports on a white enamelled inner reflector, which in turn, is helpd in position by an expanding spring ring. Removal of the reflector gives access for focusing and maintenance.

Outer glassware. Three forms of outer glassware are available, clear globe, Cat. No. Z.6467 (reference letter "C"), rimpled globe Cat. No. Z.6477 (reference letter "R") or stepped opal, Cat. No. Z.6468 (reference letter "O"). The last form is purely diffusive and no dome refractor is supplied; the lantern Cat. No. being Z.8128"O".

Oxford form. When used as an "Oxford" lantern the optical system consists of a symmetric dome refractor and an outer bowl refractor (reference letter "B") Cat. No. Z.6610.

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

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

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