| 摘要 |
<p>410,477. Vehicle &c. lamps. JANSMA, C. X., 54, Langestraat, and VELDEN, M. VAN DER, 29, Mozartstraat, both in Tilburg, Holland. Nov. 15, 1932, No. 32312. Convention date, Nov. 27, 1931. [Class 75 (ii).] A vehicle or like lamp is fitted with an optical system consisting of a series of cylindrical lenses or prisms which is substantially straight in the axial direction of the prisms but is curved as a whole in a transverse direction whereby the beam is only slightly dispersed in one direction but is dispersed in a direction at right angles thereto over an angle of more than 180‹ in such a manner that the luminous intensity decreases gradually from the optical axis. In the form shown the optical system comprises a curved row of substantially straight glass tubes 3 arranged parallel to one another, and the parabolic or like reflector 2 is cut away at the sides 4.</p> |
