Abstract: A reusable factory fixture frame is disclosed for use in the manufacture of a color cathode ray tube having a flat faceplate and a tensed foil shadow mask. The frame provides for mounting an in-process shadow mask during photoexposure of an in-process faceplate in a lighthouse. The frame includes a generally rectangular frame structure having grooves thereabout for receiving an edge of the shadow mask. Spring-loaded mechanical mask-retaining devices are secured to the side of the factory fixture frame for temporarily and removably supporting the in-process shadow mask in tension in the grooves. The shadow mask is heated and allowed to expand prior to being temporarily and removably supported on the frame, and the shadow mask is allowed to cool and shrink in tension while so being supported to effect tensing of the shadow mask in clamped condition on the frame.

Abstract: A novel drawing board particularly adapted for use in making drawings or sketches from charcoals, pastels or similar materials is disclosed. The drawing board comprises a base member or board and a series of plates which are adapted to be positioned around the outer edge or periphery of the board. The individual plates, which are preferably formed of a transparent plastic, are removably secured to the board and, when secured to the board, form a margin or border for the sheets being held. The plates are secured to the board by bolt or other suitable means positioned through openings and/or slots formed in the base member and plates. In the use of the drawing board, the plates are loosened and are moved perpendicular relative to the edge of the board. One or more sheets of paper are then slipped between the plates and the board with the plates then being adjusted and tightened to secure the paper.

Abstract: A device is described for masking the gold connector tabs located along the edges of printed circuit boards to prevent the connectors from becoming solder coated during wave solder operations. The device is comprised of a pair of angle sections coupled to each other by tensioning means. The sections are easily applied to the circuit board assembly without scratching the gold contacts. Moreover, they provide stiffness to the board and a dam to prevent solder from flowing over the board and damaging the electrical components mounted thereon during wave soldering. The device is easily removable from the circuit boards after soldering and is reusable. Finally, the device of the present invention is characterized by long life, reasonable cost and ease of use.