Abstract: An antiburst system for water lines. A pipe has an inlet connected to a source of water and an outlet. A flexible tube is positioned in the pipe and is supported by a coiled spring extending along the longitudinal axis of the tube. An air vent section is coupled to the interior of the flexible tube for enabling atmospheric air to enter and escape from the interior of the flexible tube.

Abstract: A film transport and control system for a microfilm image projection system having a single joy-stick operator device which controls both vertical scan and film speed in foreward and reverse. At higher film speeds, in both directions, the glass flats between which the film passes across the projection station are separated to prevent scratching the film.

Abstract: An interlock circuit is provided for tape and film machines which, when the high speed forward or reverse motors are in operation, prevents the main power from being turned off even though the operator might actuate the power switch. Instead of the power going off when the main power switch is operated during high speed operation, the machine continues to operate until the operator takes his hand off the fast forward or reverse drive switch, and then the brake is energized to stop the motion of the film or tape. When the brake cycle is complete, the power is then automatically turned off.

Abstract: A data film capstan about which a high speed data microfilm is wrapped is directly mechanically linked by a gear speed reduction mechanism to an index film capstan having an index film wrapped thereabout for driving the index film in synchronism and at a predetermined reduced speed for easy index data viewing.