Zenith Electronics Corporation

Zenith Radio Corporation

Lowell A Cordingley

Lawrence W Dougherty

Allan D Kautz

Lester C Gutschick

Armando V Marino

An apparatus and process for use in the manufacture of a tension-mask color cathode ray tube provides for mechanically severing a waste portion from the useful portion of an in-process foil mask secured to mask-support means extending from a faceplate. The apparatus comprises means for support mask-servering means adjacent ot the mask outside the mask support means, and means for translating the mask-severing means into engagement with the mask to sever the mask from the mask support means adjacent all points along the mask-support means.

Mechanical means and process for severing a tensed foil shadow mask

An improvement in an anode contact spring for use in a color cathode ray tube is disclosed. The improvement comprises positive locking means for locking an attachment end of the contact spring to a supportive member for suspending the shadow mask adjacent to the panel. The positive locking means comprises bolt means extending from the supportive member and which is located in a preselected lateral position on the member. Clasping means on the attachment end provide for clasping the supportive member. One leg of the clasping means is a hasp for engaging the bolt. An anti-twistoff fold is provided in the contact spring adjacent to the attachment end. Upon engagement by manual pressure of the clasping means with a supportive member, the clasping means expands to provide engagement of the hasp with the bolt, then contracts to provide push-click positive locking of the contact spring to the supportive member. The anti-twistoff fold allows for substantial deflection of the contact spring without twisting off and unlocking the clasping means. The preselected locating of the bolt provides for the precise lateral positioning of the anode contact spring with respect to the shadow mask and the funnel.

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Des Plaines, IL, United States of America

Lowell A Cordingley