A new portable electric-battery reading lamp that can be strapped
to the forehead, particularly useful in studying maps and aerial
photographs and in plotting fire-control data at night, has been
produced by the Germans. Freeing the user's hands, it has the additional
advantage of providing a safe light for close night work in forward
areas. When the lamp is tilted downward at a 45° angle its visibility
is virtually zero if the beam is kept from striking a shiny or brightly
When the beam is directed at a map or chart, held in the normal
reading position, the effectively lighted area is approximately 7 by
The lamp consists essentially of three parts, battery case. lead wire,
and an enclosed lamp receptacle. An elastic strap, attached to the
receptacle, enables the user to wear it like a miner's lamp. The battery
case is carried in the user's hip pocket, and the lead wire lies along his
The Bakelite battery case is light in weight. Its dimensions are
1 1/4 by 3 by 4 inches and it contains a 4.5-volt dry battery.
|German 88-mm antitank gun Pak 43/41.|
The lamp receptacle is tubular in shape, 1 3/8 inches in diameter and
2 inches in length, and it, like the battery case, is made of bakelite.
The front end of the tube is inclosed except for a fan-shaped light
opening three-eighths by five-eighths inches. The opening is provided
with both a clear-glass and a blue-glass covering. The desired covering
may be placed over the light opening by turning a circular holder,
into which both glasses are fitted. The blue glass cuts the normal light
intensity about 25 percent and slightly intensifies red detail on a map.
A semicircular hood extends three-eighths inch beyond the light
opening. The tube contains a 3.5-volt lamp.
The electrical lead connecting the lamp receptacle to the battery is
a very flexible rubber-insulated steel wire.