- Email: [email protected]
New photocon telemetering counters
330
CURRENT TOPICS
Hoisting and lowering of loads is controlled by a lever conveniently located on the left side of the operator's compartment. Steering is controlled through spur geared reduction to drive unit with arc of steer over 200 deg. Rugged spring loaded dual caster wheels assure four point contact of truck at all times even on uneven floors and at the same time provide proper load distribution for stability. The drive unit is a totally enclosed double reduction spur geared drive direct to drive axle which eliminates any adjustment for wear. The gear train operates in an oil bath with all rotating parts mounted on ball bearings. The Warehouser electric rider pallet truck is equipped with deadman safety control treadle which instantly cuts off power and applies brake when the operator leaves the truck.
New Photocon Telemetering C o u n t e r s . - - T w o new series of telemetering counters are offered by Photocon Research Products, of Pasadena, Calif. Both are small lightweight precision instruments which totalize and visually indicate shaft rotation in either direction in increments of ~ 0 revolution. The PC-500 series potentiometer counters have an accurate electrical potentiometer on each counter wheel. The potentiometer resistance ratios are directly proportional to the visual indication. The CC-500 series contacting counters have electrical contacts corresponding to each number on each wheel. Both are said by the maker to be suited to many control and computing applications, as well as to the remote indication and recording of data correlated photographically. L u m i n o u s Ceilings Combine Beauty with Usefulness (Petroleum Newsnotes).--Luminous ceilings that
lJ. F. I.
hide fire-fighting sprinkler systems, but fall out of the way if fire starts, have been made from an oil-derived vinyl plastic. The thin plastic strips are hung below the real ceiling, diffusing the rays of fluorescent lamps, which shine through in a bright, glareless light. Besides their attractiveness, they help muffle sounds in supermarkets, specialty shops, offices and banks where they have been used. Although they hide electrical conduits, air conditioning ducts, and other rough construction, they do not interfere with the sprinkler system required for fire protection. If a fire starts, the vinyl softens and falls out of the way.
Effect of Ultrasonic Energy on Fibrous Materials (Newsletter for Wool Textile Executives, Vol. 5, No. 7) . - - T h e use of ultrasonic energy as an aid to dyeing, scouring and other finishing processes has been suggested at various times. It is obvious that laboratory evaluation of the effects of such energy on fibers should precede pilot plant trials. In one such laboratory evaluation, frequencies of 10, 22, 30, 80 and 175 kilocycles were applied to various fibers in distilled water. Damage to specimens was determined microscopically. The greatest damage to both fibers and yarns was found at 10 kilocycles. The damage decreased rapidly with increasing frequency. The degree and type of damage differed radically with the type of fiber. Cavitation (bubble formation) was greatest at 10 kilocycles and damage was greatest at the areas of greatest bubble concentration. Boiled and deaerated water produced less bubbling and less damage. There was no effect of temperature between 0 ° and 70 ° C. When fabrics were treated the accumulation of bubbles was more dispersed and they were damaged less than yarns and particularly fibers.
CURRENT TOPICS
Hoisting and lowering of loads is controlled by a lever conveniently located on the left side of the operator's compartment. Steering is controlled through spur geared reduction to drive unit with arc of steer over 200 deg. Rugged spring loaded dual caster wheels assure four point contact of truck at all times even on uneven floors and at the same time provide proper load distribution for stability. The drive unit is a totally enclosed double reduction spur geared drive direct to drive axle which eliminates any adjustment for wear. The gear train operates in an oil bath with all rotating parts mounted on ball bearings. The Warehouser electric rider pallet truck is equipped with deadman safety control treadle which instantly cuts off power and applies brake when the operator leaves the truck.
New Photocon Telemetering C o u n t e r s . - - T w o new series of telemetering counters are offered by Photocon Research Products, of Pasadena, Calif. Both are small lightweight precision instruments which totalize and visually indicate shaft rotation in either direction in increments of ~ 0 revolution. The PC-500 series potentiometer counters have an accurate electrical potentiometer on each counter wheel. The potentiometer resistance ratios are directly proportional to the visual indication. The CC-500 series contacting counters have electrical contacts corresponding to each number on each wheel. Both are said by the maker to be suited to many control and computing applications, as well as to the remote indication and recording of data correlated photographically. L u m i n o u s Ceilings Combine Beauty with Usefulness (Petroleum Newsnotes).--Luminous ceilings that
lJ. F. I.
hide fire-fighting sprinkler systems, but fall out of the way if fire starts, have been made from an oil-derived vinyl plastic. The thin plastic strips are hung below the real ceiling, diffusing the rays of fluorescent lamps, which shine through in a bright, glareless light. Besides their attractiveness, they help muffle sounds in supermarkets, specialty shops, offices and banks where they have been used. Although they hide electrical conduits, air conditioning ducts, and other rough construction, they do not interfere with the sprinkler system required for fire protection. If a fire starts, the vinyl softens and falls out of the way.
Effect of Ultrasonic Energy on Fibrous Materials (Newsletter for Wool Textile Executives, Vol. 5, No. 7) . - - T h e use of ultrasonic energy as an aid to dyeing, scouring and other finishing processes has been suggested at various times. It is obvious that laboratory evaluation of the effects of such energy on fibers should precede pilot plant trials. In one such laboratory evaluation, frequencies of 10, 22, 30, 80 and 175 kilocycles were applied to various fibers in distilled water. Damage to specimens was determined microscopically. The greatest damage to both fibers and yarns was found at 10 kilocycles. The damage decreased rapidly with increasing frequency. The degree and type of damage differed radically with the type of fiber. Cavitation (bubble formation) was greatest at 10 kilocycles and damage was greatest at the areas of greatest bubble concentration. Boiled and deaerated water produced less bubbling and less damage. There was no effect of temperature between 0 ° and 70 ° C. When fabrics were treated the accumulation of bubbles was more dispersed and they were damaged less than yarns and particularly fibers.