A Combined Anti-dazzle Lens and Fog-light.
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METE main problem to be overcome 1..in• countering headlight dazzle has been to obtain devices which, whilst eliminating the dazzling properties of the rays, allow the lamps to east a sufficiently clear and revealing light for ordinary driving purposes. Andaz, Ltd., 5, Key Hill Drive, Birmingham, in its special lens, which should efficiently combine these ditties with that of providing, when required, a light whieh assists the operator when driving in mist or fog, would appear to have materially contributed to the solving of this pressing problem.
The constructien of the Andaz lens is on a new principle, the device chiefly consisting of two circular glasses, each orwhieli is tinted to an orange shade for half its arcs and one being slightly greater in diameter than the other. The larger glass is secured, with its orange-hued portion uppermost, by a special, ring of metal inside the lamp and the smaller is Mounted behind it on a spindle which passes through a hole in the centre of the forward glass,
a space of about in. being left between the glasses. It will be seen from this description that, when the spindle is turned by means of a knob which is provided for this purpose at its front end, the inner glass, being fixed to the spindle, revolves behind that which is secured to the lamp rim.
The device is so arranged that the inner glass•can be 'fixed, as desired, with its orange-coloured section coinciding with either the tinted or clear portion of the outer piece. In the first ease an 'anti-glare lens is provided, the dazzling rays being allowed to pass only through the lower halves of the glasses and thus beingnormally kept below the vision of the drivers of appreaching vehicles, whilst the upper half of the beam from the lamp-is in the nature of a soft glow. With the inner glass' in the second position the lens causes the /amp ,to throw a golden-hued which is claimed to possess unusual fog
penetrating qualities. Another advantage, when the device is used in weather of this nature., is that it prevents the back glare, which is very tiring to the eyes of a driver. Furthermore, the maker claims that this foglight -avoids the mirroring effect sometimes caused by brilliant lights, on wet, tarred roads which, in some cases, is very troublesome.
Andaz, Ltd., states that the device can be fitted to any .• existing type of lamp which has a minimum clearance of / in. between its bulb and the glass. The price for Andes.: lenses having diameters up to -6 ins. is 21.s., whilst those from 6 ins; to 8 ins, in diameter cost 25s.