Thomson Licensing S.a.

Videocolor S.p.a.

Joseph Arthur Reed

Gary Lee Diven

Steven Haun

Louis Emmanuel Matalon

Pierluigi Testa

Kelly Eugene Hamm

Frank Rowland Ragland, Jr

Fabrizio Berton

Anthony Socrates Poulos

Randall Wayne Martin

An apparatus and method for retaining a damper wire used in a cathode ray tube to reduce vibration in the grill type mask assembly of a cathode ray tube. The damper wire is retained across a grill type mask by a bimetal damper spring having a first end and an opposing second end. The second end is coupled to the frame of the grill type mask assembly. A tab located proximate the first end of the damper spring is adapted to accept the damper wire that traverses the mask.

Damper wire spring for a cathode ray tube

A tension mask frame assembly for use in a cathode ray tube is provided. The tension mask frame assembly includes a substantially rectangular mask support frame, having a first coefficient of thermal expansion. The frame is formed of a pair of opposing long sides being joined to a pair of opposing short sides wherein one of these pairs has an attachment zone. The tension mask, having a second coefficient of thermal expansion, is supported by the frame at the attachment zones along the opposing sides. The attachment zones are formed of a material having a coefficient of thermal expansion which is approximately the same as the second coefficient of thermal expansion in order to be matched with the tension mask.

Warp-free dual compliant tension mask frame

The present invention provides a tension mask having a frequency distribution with improved vibration damping. The tension mask includes a center portion between two edge portions. The tension mask also has a parabolic frequency distribution between the edge portions whereby the center portion has a central frequency distribution value and the edge portions have a relatively lower peripheral frequency distribution value characterized in that the range of variation between the center and edge portions frequency distribution value is in the closed interval of about 8 Hz&lE;&Dgr;&lE;12 Hz.

Tension mask for a cathode-ray tube with improved vibration damping

A color picture tube has a tensioned mask supported by a support frame mounted within said tube. The mask has a significantly lower coefficient of thermal expansion than the frame. Intermediary members are located between the mask and the frame. The intermediary members are of a material having a coefficient of thermal expansion similar to that of the mask. Each of the intermediate members is attached to the frame by a plurality of connectors. Each of the connectors is elongated, and each of the connectors is attached at one end thereof to one of intermediate members and attached at an opposite end to said frame.

Color picture tube having a low expansion tension mask attached to a higher expansion frame

The invention provides an improved vibration damper for use in a tension mask assembly of a CRT. The improved vibration damper is provided along edges of a tension mask which is attached to a support frame. The vibration damper consists of an elongated strip member having first and second ends mounted to a surface of the tension mask along its borders. A substantial portion of the elongated strip member located between the first and second ends lies in frictional contact with the tension mask to receive vibrations induced in the mask.

CRT having a shadow mask vibration damper

A color picture tube ( ) has a tensioned mask ( ) supported by a support frame ( ) mounted within the tube. The mask has a significantly lower coefficient of thermal expansion than the frame. Intermediate members ( ) are located between the mask and the frame. The intermediate members are of a material having a coefficient of thermal expansion similar to that of the mask. The frame has elongated tabs ( ) extending therefrom. Each of the tabs is attached at one end thereof to the remaining portion of the frame. The distal ends of the tabs are welded to the intermediate members.

The invention provides a CRT having a funnel sealed at one end to a faceplate panel with a luminescent screen on an interior surface thereof, a mask assembly supported within the CRT and in proximity to the screen, the faceplate panel having a plurality of peripheral sidewalls each having an inside surface. The CRT also includes a plurality of studs, with at least one stud affixed in each of the corners of inside surface of the sidewalls. A plurality of springs engage the corner studs, to support the mask assembly within the CRT; at least one additional stud is affixed along the inside surface of one sidewall and a shim is attached around the additional stud. On the mask assembly at least one bracket is positioned to have a slot into which the shim is loosely engaged, thereby mitigating motion in a plane parallel to the interior sidewall.

Shock absorbing stud shim for a CRT

A microphonic damper clip for mounting to the border of a tension mask. The damper clip is formed of two halves with each half having a first leg and an integral second leg. The free end of one of the legs from each of the two halves of the damper clip are inserted into an aperture disposed on the border of the tension mask. At least one free end of each corresponding leg is then attached to one another to form a damper clip.

Microphonics damper clip

A color cathode ray tube comprises a color selection mask stretched in at least one direction, the mask comprising on its peripheral surface mask vibration damper means in the form of a coupled oscillator of the type comprising a central part attached to the surface of the mask and two wings extending on either side of the central part.

Frame/mask structure for cathode ray tube

The invention relates to a tension mask frame for a CRT having a generally rectangular support frame to which a peripheral portion of a tension mask is attached. The support frame has at least a long side and a short side. One side extends along an outer edge of the mask and protrudes inward toward the outer edge of the mask. The short side is attached to the long side to form a closed corner portion between the long side and short side of the support frame. The closed corner portion is used to suspend the mask within a panel portion of the color cathode ray tube.

Cathode ray tube mask frame assembly

An apparatus for maintaining tension in a mask frame of a cathode ray tube. The apparatus includes affixing a shadow mask to a pair of triboxes disposed along opposite sides of a mask frame at a predetermined tension. The triboxes are coupled to the mask frame by braces having a different coefficient of thermal expansion than the triboxes so as to compensate for the expansion of the frame during thermal cycling of the cathode ray tube. Consequently, it is possible to maintain the tension force applied to the shadow mask by the mask frame.

Apparatus for maintaining tension in a shadow mask

The invention relates to a tension mask frame assembly for a CRT having a substantially rectangular mask support frame. The mask support frame has a pair of long sides extending about a central major axis and a pair of short sides extending about a central minor axis. On at least one pair of these sides, a midsection is disposed between and is continuous with two end sections. The midsection is made of a material having a coefficient of thermal expansion which is less than a coefficient of thermal expansion of the end section material. A tension mask is supported to the mask support frame at attachment points adjacent the pair of sides having the midsection.

Tension mask frame assembly having a detensioning mask support frame

A split foot damper for damping vibrational energy on a tension mask having a border with an edge. The apparatus has a first element having a first portion in moveable contact with a surface of the border and a second portion in moveable contact with the edge of the border, and a second element having a third portion in moveable contact with the surface of the border and a fourth portion in moveable contact with the edge of the border, where the two elements are connected to each other at a point that is affixed to the surface of the border. As the mask vibrates, the vibrational energy is transferred to the split foot damper, wherein vibrational energy is dissipated as the portions of the split foot damper makes contact against the surface and edge of the border.

Split foot damper

The present invention provides an improvement in a color picture tube having a tension mask supported by a support frame mounted within the tube. The mask includes an active apertured portion formed by a plurality of parallel vertically extending strands, between which are elongated operational apertures through which electron beams pass during operation of the tube. Top and bottom border portions, outside the active apertured portion of the mask, have additional apertures therein that are aligned with the longitudinal centerlines of the strands.

Growing community of inventors

York, PA, United States of America

Joseph Arthur Reed