H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/35.167
H01J 29/07 (2006.01) H01J 29/02 (2006.01) H01J 31/20 (2006.01)
Patent
CA 1139348
ABSTRACT OF THE DISCLOSURE: A rectangular-type color cathode ray picture tube includes a phosphor-screen-bearing faceplate with a rearwardly extending flange and a substantially rectangular shadow mask assembly. The mask assembly is suspended adjacent to but spaced from the faceplate by a plurality of leaf springs spaced about the periphery of the mask assembly. The plane of each spring is substantially parallel to the center axis of the tube. An end section of each spring is anchored to the mask assembly, and a distal end is detachably engaged to an associated stud protruding inwardly from the faceplate flange. The engagement is by movement of the distal end toward and away from the tube axis. Each spring is characterized by having an intermediate active section which in its unloaded state extends away from the mask assembly in a predetermined precurvature. The spring is deflectable through a first position wherein it is engaged with the stud, to a limit position toward the mask assembly wherein the spring provides maximum clearance for the stud and all portions of the spring for facile mask assembly insertion and removal. The precurvature is such that the spring, upon deflection, self-straightens to a substantially planar configuration either upon engagement with the stud wherein the mask assembly has enhanced immunity to shock- induced dislodgement or mispositioning; or the spring approximately self-straightens at the limit position preventing possible overstressing of the spring or at a compromise position intermediate to the first position and the limit position. -2-
337554
Dougherty Lawrence W.
Macrae & Co.
Zenith Radio Corporation
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