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bth full range | lanterns

leeds
This street-lighting lantern consists of a canopy made of copper spinning reinforced with wrought-iron spider, and a globe cage in basket form consisting of wrought-iron strips attached to a cast ring. The globe is of BTH "Nelite" glass. An all-porcelain lampholder and inner reflector in white vitreous enamel are employed.

The BTH "Nelite" glass globe is of the rippled variety with a trace of opal, giving excellent diffusion, but not materially interfering with the directional control. When lighted at night, the rippling gives the effect of innumerable minute crystals which give life and sparkle to the lantern, which is not found with plain opal globes. At the same time there is an absence of glare. The rippling also has the advantage of making the globe practically self-cleaning, since rain falling on it is drained off naturally by the small channels, and carries away a good proportion of any dirt that may have collected.

??? ??? GLS
??? Top Entry No Gear 1928 Journal






mercra "h"
The first lantern to horizontally burn a mercury discharge lamp. Introduced in 1934. A patented magentic deflector is incorporated in the lantern to allow a standard 400W or 250W Mercra lamp to be burned in a horizontal position. The first installation is in Bromford Lane, Birmingham. Suitable for the lighting of wide thoroughfares. In common with all new departures, however, certain manufacturing difficulties were experienced which prevented the lantern from being marketed at a competitive price. General adoption of the lantern was not possible except in those places where a high standard of lighting was more important than the capital cost. This led to a further three years of research work leading to an improved, remodelled version of the lantern.
Mercra "H" 250-400W MA/H
GES Pole clamp No Gear 1935 Advert
1936 Advert
1936 Advert
1937 Journal



diron
For main road lighting. Uses a series of internal reflectors and refractors and then exterior plate refractors to create its lighting distribution.
Diron 400W MA/V
GES Side Entry No Gear 1936 Advert
1936 Paper
1936 Advert
1939 Advert



dilen
A general purpose lantern of simplified design. Introduced in 1936. Fitted with a prismatic bowl and could be used with either mercury vapour or tungsten filament lamps. Manufactured in two sizes: one could take 250-400W MA/V and a smaller size was used with 150W MA/V. A simplified side entry model was introduced in 1939 after the engineering success of the Sodra "H" lantern. Also mentioned as popular in 1945.
??? ???W GLS
150W MA/V
??? ??? No Gear 1936 Journal
1936 Advert
1937 Advert
1937 Advert
1937 Journal
1939 Programme
1945 Programme
??? ???W GLS
250-400W MA/V
??? ??? No Gear 1936 Journal
1936 Advert
1937 Advert
1937 Advert
1937 Journal
1939 Programme
1945 Programme



diref
Introduced in 1936. An open reflector type of lantern with well-glass for side street lighting. Suitable for the lighting of narrow thoroughfares.
??? 150W MA/V
250W MA/V
GES Top Entry No Gear 1936 Journal
1936 Advert



ranger
Introduced in 1936. Intended for side mounting and is particularly applicable where there are tram or trolleybus standards spaced at 120'. Its water trap prevents damage to the lamp due to water entering through faulty joints or condensation in the bracket. It uses a simple refractor and reflector for light control.
??? 250-400W MA/V
GES Side Entry No Gear 1936 Advert



crown
A general purpose lantern.
??? ??? GLS
GES Top Entry No Gear 1936 Advert



county junior
Especially designed for the new 80W and 125W MB lamps and introduced in early 1937 at around the same time as the lamps. For Group B roads. It was stressed that the lantern could also acccomodate 60-200W GLS and was fitted with a focusing device (unlike most lanterns of its type and price). Weighs 7½lbs. There are three main parts of the lantern body: the top cap (cast iron), main spinning (heavy gauge copper) and reflector (sheet steel vitreous enamel). The lampholder is fixed on a focussing carriage actuated by one knurled knob. The glassware and reflector can be removed from the lantern by removing one screw for cleaning. Light redirection achieved by means of a special one-piece refractor band which is arranged to give a singly axially asymmetrical form of light distribution. Vertical prisms are formed on the inside to produce the required brightness distribution on thr road surface.
County Junior 60-200W GLS
80-125W MB/V
BC
3BC
Top entry No Gear 1937 Advert
1937 Advert
1937 Journal
1937 Advert
1937 Journal
1937 Programme
1939 Journal
1945 Programme



county cadet
County Cadet ???
??? Top entry No Gear 1945 Programme



mercra "h"
The newly designed Mercra "H" lantern is introduced in 1937. First exhibited at the APLE's Folkestone Conference with an trial installation along Sandgate Road. Improved and less expensive version of the original model. Designed for side mounting. The rectangular light distribution curve makes the lantern particularly suitable for the lighting of wide thoroughfares. Weighs 28lb and the finish is Battleship Grey. A horizontally disposed line source of light lends itself to simple optical control with higher efficiency of utilisation. A sharp cut-off is provided below the horizontal, obviating glare and increasing the amount of light available for the illumination of the road surface. This modified lantern is designed for side mounting and incorporates a patented magnetic deflector which makes it possible to brun horizontally standard 250 watt or 400 watt Mercra Lamp. It is constructed mainly of non-corrosive aluminium alloy and weighs 28 lbs. The reflectors are made of a special quality anodised-aluminium which is durable and easily cleaned, and is highly efficient optically. Two years later the latern is still extremely popular despite A.R.P. expenditure. The optical system is now described as a "controlled cut-off" (which is a semi-cut-off). The patented method of mounting the top reflectors ensures the preservation of correct contour, while the simplicity of wiring and connecting, accessibility of the whole unit for cleaning, make for economical and trouble-free operation.
320 250-400W MA/H
GES Top Entry No Gear 1937 Advert
1937 Journal
1938 Advert
1938 Journal
1938 Advert
1938 Journal
1938 Advert
1938 Journal
1939 Advert
1939 Advert
1939 Programme
1945 Programme



sodra "h"
After the success of the Mercra "H" lantern with its controlled cut-off optics (semi-cut-off), the firm introduce this sodium version of the lantern in 1939 for all sodium lamp types. The lantern is side-entry but an adaptor is available for a top-entry option. (Provision for side entry allows the design to be simplified and for less metal to be used in the body of the lantern.) Aluminium alloy is used throughout the lantern with the exception of the reflectors which are of anodised aluminium of high purity.
??? 45 SO/H
BC Side Entry No Gear 1939 Programme
??? 60 SO/H
BC Side Entry No Gear 1939 Programme
??? 85 SO/H
BC Side Entry No Gear 1939 Programme
??? 140 SO/H
BC Side Entry No Gear 1939 Programme



parish
The firm's Open Type Conical lantern. For Group B roads.
ST275 60-100W GLS
BC Top Entry No Gear 1950s Book
ST276 60-100W GLS
BC Side Entry No Gear 1950s Book



rural open (dome refractor)
For Group B lighting.
ST286 60-150W GLS
BC Side Entry No Gear 1950s Book
ST287 150-200W GLS
BC Side Entry No Gear 1950s Book
SM288 80-125W MA/V
3BC Side Entry No Gear 1950s Book
ST289 60-150W GLS
BC Top Entry No Gear 1950s Book
ST290 150-200W GLS
BC Top Entry No Gear 1950s Book
SM291 80-125W MA/V
3BC Top Entry No Gear 1950s Book



rural enclosed (clear bowl)
For Group B lighting.
ST293 60-150W GLS
BC Side Entry No Gear 1950s Book
SM296 80-125W MA/V
3xBC Side Entry No Gear 1950s Book
ST299 60-150W GLS
BC Top Entry No Gear 1950s Book
ST294 150-200W GLS
ES Side Entry No Gear 1950s Book
ST300 150-200W GLS
ES Top Entry No Gear 1950s Book
SM302 80-125W MA/V
3xBC Top Entry No Gear 1950s Book



urban enclosed (clear bowl)
For Group A lighting.
ST277 300-500W GLS
GES Top Entry No Gear 1950s Book
SM278 250-400W MA/V GES Top Entry No Gear 1950s Book
ST305 300-500W GLS
GES Side Entry No Gear 1950s Book
SM307 250-400W MA/V GES Side Entry No Gear 1950s Book



urban enclosed (refractor bowl)
For Group A lighting.
ST907 300-500W GLS
GES Top Entry No Gear 1950s Book
ST908 300-500W GLS
GES Side Entry No Gear 1950s Book



urban enclosed (opal bowl)
For Group A lighting.
STM279 300-500W GLS
250-400W MA/V
GES Top Entry No Gear 1950s Book
STM309 300-500W GLS
250-400W MA/V
GES Side Entry No Gear 1950s Book



urban open (dome refractor)
For Group A lighting.
ST284 300-500W GLS
GES Top Entry No Gear 1950s Book
ST311 300-500W GLS
GES Side Entry No Gear 1950s Book



600 series (clear bowl and refractor dome)
For Group A lighting.
SL600 1500W GLS
GES Side Entry No Gear 1950s Book
SL601 750/1000W GLS
GES Side Entry No Gear 1950s Book
SL602 125W MAF/V
GES Side Entry No Gear 1950s Book
SL603 60-150W GLS
BC Side Entry No Gear 1950s Book
SL604 150-200W GLS ES Side Entry No Gear 1950s Book
SL605 80-125W MA/V
80W MAF/V
3BC Side Entry No Gear 1950s Book



600 series (refractor bowl)
For Group A lighting.
SL612 250-400W MA/V
125W MAF/V
400W MAF/V
GES Side Entry No Gear 1950s Book
SL615 80-125W MA/V
80W MAF/V
3BC Side Entry No Gear 1950s Book



600 series (refractor bowl and refractor band)
For Group A lighting.
SL622 300-500W GLS
125W MAF/V
GES Side Entry No Gear 1950s Book
SL623 60-150W GLS
BC Side Entry No Gear 1950s Book
SL624 150-200W GLS
ES Side Entry No Gear 1950s Book



600 series (opal bowl)
For Group A lighting.
SL630 1500 GLS GES Side Entry No Gear 1950s Book
SL631 750-1000W GLS
GES Side Entry No Gear 1950s Book
SL632 250W-400W MA/V
125W MAF/V
400W MAF/V
GES Side Entry No Gear 1950s Book
SL633 60-150W GLS
BC Side Entry No Gear 1950s Book
SL634 150-200W GLS
ES Side Entry No Gear 1950s Book



horizontal enclosed series 700 / mazdalux horizontal
For Group A lighting. Described as new in 1951. Built almost entirely from silicon-aluminium alloy. It consists of a main casting and a refractor bowl-retraining frame which is attached to the main casting by an adjustable hinge and is locked by a quick action spring catch. Includes a magnetic arc control to allow the standard mercury discharge lamp to be used in a horizontal position. Has a controlled-cut-off (semi-cut-off) distribution. Closely graded control of the light output in the vertical plane near the horizontal ensures that glare is kept to a minimum. At the same time sufficient light is emitted up to the horizontal to maintain continuity of visual accommodation.
SL700 250W/400W MA/H
BC Side Entry No Gear 1950s Book
1951 Book



sodium enclosed lantern
For Group A lighting. Described as an "improved design" in 1953. Constructed from high grade corrosion-resistant alloy. Lamp support, side panels and an anodised aluminium reflector are mounted to form a single optical unit. Includes a clear Perspex cover.
SL.721 140W SO
BC Top Entry No Gear 1950s Book
1953 Advert
SL.722 85W SO
BC Top Entry No Gear 1950s Book
1953 Advert
SL.730 140W SO
BC Side Entry No Gear 1950s Book
1953 Advert
SL.731 85W SO
BC Side Entry No Gear 1950s Book
1953 Advert



sodium open lantern
For Group A lighting.
SL.715 140W SO
BC Top Entry No Gear 1950s Book
SL.716 85W SO
BC Top Entry No Gear 1950s Book
SL.735 140W SO
BC Side Entry No Gear 1950s Book
SL.736 85W SO
BC Side Entry No Gear 1950s Book



fluorescent lantern
Introduced in 1948. Constructed from light silicon-aluminium castings with a sheet metal roof and a clear plastic cover held in position by four toggle catches. All necessary gear assembled within the lantern. Various options allow for different mounting options. Lamps and gear can be changed by removing one of the ends.
SLB750 3x80W MCF
BC Side Entry Gear 1950s Book
1951 Book
SLB751 3x80W MCF
BC Side Entry Gear 1950s Book
1951 Book
SLB752 3x80W MCF
BC Side Entry Gear 1950s Book
1951 Book
SLB753 3x80W MCF
BC Side Entry Gear 1950s Book
1951 Book
SLB754 3x80W MCF
BC Side Entry Gear 1950s Book
1951 Book
SLB755 3x80W MCF
BC Side Entry Gear 1950s Book
1951 Book



fluorescent lantern
Described as the "latest model" in 1953.
SLX3535 3x80W MCF
BC Side Entry Gear 1953 Advert
1953 Journal



fluorescent lantern
For Group B lighting. Ideally suited for the lighting of residential and shopping areas. All the auxiliary gear is included in the lantern. Can either be mounted on a concrete bracket or a steel bracket arm. Used for the side-street lighting in Stevenage New Town.
SL.3500 2x40W MCF
BC Top Entry Gear 1950s Book
1953 Advert



horizontal sodium open lantern
For Group A lighting.
?? 85W SO
BC Side/Top Entry No Gear 1953 Journal
?? 140W SO
BC Side/Top Entry No Gear 1953 Journal



sapphire
Introduced in 1953. Can be fitted with a magnetic deflector if required. Light distribution is of the "non-cut-off medium angle beam" type as defined in BSCP1004:1952. Also complies with Street Lighting Lanterns BS 1788:1951.The glass bowl has diffusing ripples which are self-cleaning in the rain. Made from corrosion-resistant casting LM6M alloy.
SL??? 250-400W MA/H
ES Side Entry No Gear 1953 Advert
1953 Journal
1955 Advert



amber
For Group A lighting. Gives a non-cut-off medium-angle beam. Gear optional.
?? 85W-140W SO
BC Side Entry No Gear 1955 Advert
?? 85W-140W SO
BC Side Entry Gear 1955 Advert



diadem lantern
For Group A lighting. With built-in gear for either Switch-Start or Instant-Start lamps.
??? ??? MCF
BC Side Entry Gear 1955 Advert