Lamp reflectors

Details Lamp reflectors Lamp reflectors

1989-01-30

1990-08-21

Lazarus, Ira S.

Illumination

With wearing apparel or body support

Head covering or clamp

362346, 362350, 22092, F21V 706

Patent

active

049511807

ABSTRACT:
A miner's cap lamp includes a reflector having a substantially parabolic reflecting surface having a gradient variation from that of a true parabola curve Y.sup.2 =4MX along at least one line towards the outer edge of the reflector, wherein the gradient along the line has a value equal to that of a true parabola at the maximum value of X for the reflector but has a value greater than the gradient of a parabolic surface for a modified region located nearer the pole of the curve, the gradient variation varying continuously over the modified region, such that the gradient variation is a minimum at the maximum value of X of the modified region and the gradient variation is a maximum at the minimum value of X of the modified region.

REFERENCES:
patent: 3553705 (1971-01-01), Ondreska
patent: 3944810 (1976-03-01), Grindle
patent: 4420801 (1983-12-01), Reiling et al.
patent: 4536834 (1985-08-01), Sands et al.

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