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Rhodium for jewelry plating
460
CURRENT TOPICS
“Color Equalizer” for Television. -The Radio Corporation of America recently announced the invention of a magnetic field equalizer called the “Color Equalizer.” This is a significant new RCA invention which guarantees improved color set performance and makes possible a reduction in manufacturing costs. Dr. E. W. Engstrom, Executive Vice President, RCA Research and Engineering, pointed out that, previously, the performance of color tubes was affected by magnetic fields such as the earth’s field or local sources. “To minimize such disturbances,” Dr. Engstrom said, “tubes have been protected up to now with a conical magnetic shield which was effective in shielding the smal1 end of the tube tone, but relatively less effective near the tube face. We have also used a rim coil in the farm of a loop placed near the plane of the phosphor plate, in addition to the magnetic shield. “Our new ‘Color Equalizer’ performs the function of the rim coil, but unlike the rim coil, its effects may be controlled at various points around the circumference of the color tube It makes unnecessary either a face. magnetic shield or the rim coil. The net result is a better, more positive effect and a reduction in tost of the receiver. “The magnetic shield has been an item of relatively high tost in a color receiver even though we have carried on an active tost reduction development. We now propose to use the new RCA ‘Color Equalizer’ in place of the magnetic shield and the rim coil formerly used. By doing so, a saving wil1 be effected in the tost of manufacturing our new 21-in. color receiver. In indicating this saving we are comparing the use of the lowest tost magnetic shield we have been able to develop for our 19-in. glass envelope color tube together with a rim coil,
[J. F. 1.
and the ‘Color Equalizer’ for use with om Zl-in. metal envelope color tube. The saving on this item alone represents a saving to the consumer of at least $20.” Rhodium for Jewelry Plating (White Metal Nezvs Letter, Vol. X1X, No. 3) .-Much of the popular costume jewelry is given a “flash” plating of rhodium, a metal of the rare platinum group. Most applications of rhodium for this purpose are a very thin electrodeposit within the range of onehundred thousandth to one millionth of an inch thick. This coating of rhodium provides a hard and highly reflective surface. Rubber Roads.-“Stretching a road from here to there” may be more than just a figure of speech, that is, if “rubber” roads become widespread. Tiny pellets, about the size of pencil erasers, which mix easily with asphalt without having to be shipped hot in insulated tank cars, may make possible more durable roads while cutting costs appreciably. Both the synthetic rubber pellets and the petroleum asphalt owe a large part of their existente to oil. Among the good qualities attributed to the “rubber” roads are elasticity that makes them better able to withstand rigors of traffic and heavy loads, a lack of softness in summer or cracking in winter. Safe Refrigerant.-A new refrigerant has been developed which offers safety in cooling to 150 F. below zero, yet is nonexplosive and nonflammable. Bearing the complicated name of monochlorotrifluoromethane and derived in part from oil, the new refrigerant is expected to fill the bulk of present industry low-temperature requirements, and be useful in chemical and pharmaceutical processing, aging of steel, and most types of low-temperature aircraft testing work.
CURRENT TOPICS
“Color Equalizer” for Television. -The Radio Corporation of America recently announced the invention of a magnetic field equalizer called the “Color Equalizer.” This is a significant new RCA invention which guarantees improved color set performance and makes possible a reduction in manufacturing costs. Dr. E. W. Engstrom, Executive Vice President, RCA Research and Engineering, pointed out that, previously, the performance of color tubes was affected by magnetic fields such as the earth’s field or local sources. “To minimize such disturbances,” Dr. Engstrom said, “tubes have been protected up to now with a conical magnetic shield which was effective in shielding the smal1 end of the tube tone, but relatively less effective near the tube face. We have also used a rim coil in the farm of a loop placed near the plane of the phosphor plate, in addition to the magnetic shield. “Our new ‘Color Equalizer’ performs the function of the rim coil, but unlike the rim coil, its effects may be controlled at various points around the circumference of the color tube It makes unnecessary either a face. magnetic shield or the rim coil. The net result is a better, more positive effect and a reduction in tost of the receiver. “The magnetic shield has been an item of relatively high tost in a color receiver even though we have carried on an active tost reduction development. We now propose to use the new RCA ‘Color Equalizer’ in place of the magnetic shield and the rim coil formerly used. By doing so, a saving wil1 be effected in the tost of manufacturing our new 21-in. color receiver. In indicating this saving we are comparing the use of the lowest tost magnetic shield we have been able to develop for our 19-in. glass envelope color tube together with a rim coil,
[J. F. 1.
and the ‘Color Equalizer’ for use with om Zl-in. metal envelope color tube. The saving on this item alone represents a saving to the consumer of at least $20.” Rhodium for Jewelry Plating (White Metal Nezvs Letter, Vol. X1X, No. 3) .-Much of the popular costume jewelry is given a “flash” plating of rhodium, a metal of the rare platinum group. Most applications of rhodium for this purpose are a very thin electrodeposit within the range of onehundred thousandth to one millionth of an inch thick. This coating of rhodium provides a hard and highly reflective surface. Rubber Roads.-“Stretching a road from here to there” may be more than just a figure of speech, that is, if “rubber” roads become widespread. Tiny pellets, about the size of pencil erasers, which mix easily with asphalt without having to be shipped hot in insulated tank cars, may make possible more durable roads while cutting costs appreciably. Both the synthetic rubber pellets and the petroleum asphalt owe a large part of their existente to oil. Among the good qualities attributed to the “rubber” roads are elasticity that makes them better able to withstand rigors of traffic and heavy loads, a lack of softness in summer or cracking in winter. Safe Refrigerant.-A new refrigerant has been developed which offers safety in cooling to 150 F. below zero, yet is nonexplosive and nonflammable. Bearing the complicated name of monochlorotrifluoromethane and derived in part from oil, the new refrigerant is expected to fill the bulk of present industry low-temperature requirements, and be useful in chemical and pharmaceutical processing, aging of steel, and most types of low-temperature aircraft testing work.