|
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.
|
|
Mercra "H"
|
250-400W MA/H
|
GES
|
Pole mount
|
No Gear
|
1935 Advert
|
|
|
|
|
|
|
Mercra "H"
The newly designed Mercra "H" lantern is introduced in 1938. 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.
|
|
320
|
250-400W MA/H
|
GES
|
Top Entry
|
No Gear
|
1938 Advert
1939 Advert
1939 Programme
|
|
|
|
Rural Open (Refractor Dome)
|
|
SM288
|
80-125W MA/V
|
3BC
|
Side Entry
|
No Gear
|
1950s book
|
|
SM291
|
80-125W MA/V
|
3BC
|
Top Entry
|
No Gear
|
1950s book
|
|
|
|
Rural Enclosed (Clear Bowl)
|
|
SM296
|
80-125W MA/V
|
3xBC
|
Side Entry
|
No Gear
|
1950s book
|
|
SM302
|
80-125W MA/V
|
3xBC
|
Top Entry
|
No Gear
|
1950s book
|
|
|
|
Urban Enclosed (Refractor Bowl)
|
|
SM278
|
250-400W MA/V
|
GES
|
Top Entry
|
No Gear
|
1950s book
|
|
SM307
|
250-400W MA/V
|
GES
|
Side Entry
|
No Gear
|
1950s book
|
|
|
|
|
Urban Enclosed (Opal Bowl)
|
|
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
|
|
|
|
600 Series (Clear Bowl And Refractor Dome)
|
|
SL602
|
125W MAF/V
|
GES
|
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)
|
|
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)
|
|
SL622
|
300-500W GLS
125W MAF/V
|
GES
|
Side Entry
|
No Gear
|
1950s book
|
|
SL625
|
80-125W MA/V
80W MAF/V
|
3BC
|
Side Entry
|
No Gear
|
1950s book
|
|
|
|
|
600 Series (Opal Bowl)
|
|
SL632
|
250W-400W MA/V
125W MAF/V
400W MAF/V
|
GES
|
Side Entry
|
No Gear
|
1950s book
|
|
SL635
|
80-125W MA/V
80W MAF/V
|
3BC
|
Side Entry
|
No Gear
|
1950s book
|
|
|
|
|
|
