EQUIPMENT
"33id you k n o w t h a t semiconductors i m p r o v e t h e performa ance of radios a n d T V ' s , t o o ? "
\&um^o yeA&c. ' Semiconductor devices such as ~ tro^uisfW i mprov-e Jjate^pe rf p r m a η ce a n d · Jé\}J^J^ ^rp^ôs^ TV s e t s ^ \ 'hepfing aids, comp ufers v : '·. -*" :ahd missjlgs a n d at so-make ,, ; ' . possM^ 4 d e v i l s / ^ '•..·;. /\"*-~' v ^ v - ^ ^ F Î ^ r Î 7
; M a f iinçkrocJT ^ "ÀG^ri^^irineoriy.;" ^ to develop fine che^micals* for. thé electronics indurstry.*: · provides an extens îvèlitté of r special-purity TransistAR® "- „ cherniçals to help manufacturées maintcrin the extrerâïely lov&L < ·-'"* , irrjpurify levelsnecessary-. - f o r Successful prod suction of semiconductor devLçesv Γ Electra.nios is only o n e ofVmdny -'·. industries· which rel y o n r '• ^ :.*.Mallinckr-odt process cfierriicdis^ ; >" niAnuÎacturéd tosteriçt : ; ' v v '"•• specif ijcatipris to; m e e t * p>g rf icula f ·; production needs; lÎNK^G-CHÉMlStRY 30 INDUSTRY
MALLINCKRODT ST. LOUIS
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^MiyifLE uuLLcv.nr>iu ( uecKman s josepn x_raas, synthesis of Favors, and food additives. • Organic synthesis—to study by products and to investigate reactions to learn how to improve synthesis yields. • Medical research—to separate vol atile compounds such as fatty acid es ters to get pure materials for studying nutrition, metabolism, and heart dis ease. First production units of the· in strument will b e available in Septem ber, Beckman says. Price will be u n d e r $10,000. El
Other SYNTRON Equipment of proven dependable Quality
New Glass Transmits IR
\§1
SELENIUM OR SILICON RECTIFIER POWER UNITS
MECHANICAL VIBRATING CONVEYORS 7 0
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2 7,
1959
SPIRAL ELEVATOR FEEDERS
A new amorphous glass that t r a n s mits infrared has been developed by General Electric's lamp glass depart ment. Called IR-2 glass, it could find use in domes and windows enclosing infrared equipment in aircraft and missiles. The company's light military elec tronics department put the g r e e n colored material through its paces t o determine its optical and physical p r o p erties. A piece of the glass 2.7 mm. thick transmits between 80 and 86ν in the 1.3 to 5.3 micron range. This drops to 509c at 6.2 microns a n d t o 0 % at 6.7 microns. Transmission i s
NEW Torsion Balance Saves 60% · of Weighing Time
Torsions Dial
makes the difference /Vnd what difference it makes! You can now make three t i m e s as many weighings p e r hour as before with Torsion's mew Dial Balance. Here's why: Conventional laboratory balances use a graduated beam and s l i d e weight for ; , fine v weighing after the weight has been determined with 1 g r a m . Under the old procedure the balance i s arrested, slide weight positioned, balance released, balance c o m e s to rest, position of indicator noted, balance arrested a g a i n , slide weight repositioned and so on until the weight i s determined within .01 gram. A l l this time consuming **cut-and-try*" procedure is replaced w i t h a simple graduated dial which can b e turned without a r r e s t i n g t h e oil-damped balance. This means that the time c o n s u m i n g part of the weighing (below one g r a m ) can b e fc4 dialed-in"—and in % t h e time.
N^âiri>Offlce^nd F a c t o r ^
Unconditional
Guarantee
In keeping with Torsion's Million-Plus construction, the new Dial mechanism retains i t s original accuracy after more than a million weighings. That's why Torsion Balance has unconditionally guaranteed the accuracy of t h e entire Dial mechanism. Torsion's new Dial Balance is available in two modek DLT2. shown above, has a capacity of 120 grams, a n d a sensibility reciprocal of 10 mgs. (10 nigs, moves the rest point one division). DLT2-1 has the same specifications b u t i s equipped with a scoop for seeds or other bulky material. For more information contact your laboratory supply house or write us.
;Sa!es0^ices:v G h i ^
Look what happens when you add a pinch of permanence
2 . CORK GRANULES a r e locked together to stay. You can bond many materials this w a y — w i t h Durez resins thai soften under h e a i , t h e n set h a r d .
1 . W A N T DURABILITY I N Y O U R PRODUCT? W h o doesn't! Here's how o n e manufacturer gets it. Floors t a k e a b e a t i n g — b u t this floor can stand the g a f f for years. It's cork file b y Kentile, Inc. The p e r m a n e n c e is built in with phenolic resins b y D u r e z .
3 . N O T E V E N B O I L I N G WATER can w e a k e n the g o o d , strong bond D u r e z resins p r o v i d e . These resins resist heat, moisture, a b r a s i o n — for k e e p s .
4 . WHERE can you use them? Here a r e ex a m p l e s . R u b b e r , p a p e r , s a n d , asbestos, g r o u n d w o o d — D u r e z resins b o n d them all into strong, useful products.
GET THIS I D E A - B O O K on how, where to use phe nolic resins for more dura ble products. Tells how 1 2 d i f f e r e n t i n d u s t r i e s use Durez resins to add strength, hardness, heat and moisture resistance at low cost. Write today for your copy-—free. 72
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DUREZ HOOKER
5 . IT D O E S N ' T TAKE M U C H . O f t e n , one p a r t in ten gives you the properties you want. A n d phenolic is one of the cheapest b o n d i n g agents you can b u y !
PLASTICS DIVISION
CHEMICAL
CORPORATION
604 WALCK ROAD, NORTH TONAWANDA, Ν. Υ.
HOOKER
EQUIPMENT
not affected by temperatures u p to 300° C , G E says. But transmission drops about 4% when the glass is im mersed in distilled water for 30 days. Longer periods have little additional effect. T h e glass is currently available in domes 2 1 / 2 in. in diameter and disks 3 in. in diameter. However, larger sizes will be available. T h e cost of prototype quantities will be about that of production fused quartz. Ε2
• Bond resistance t e s t e r , by Wolverine Tube, division of Calumet & Hecia, Al len Park, Mich., measures heat transfer bond resistance in bimetal and duplex tubing. Wolverine BR Tester uses liquid-to-liquid fluid system in a con centric pipe heat exchanger. The ar rangement gives high heat transfer co efficients, which are measured, thus per mits calculating bond resistance. Ε 3 • Standard
neutron
detection
• Line of light-wall stainless steel fit tings and flanges for nominal temper ature, low pressure, and noncritical process piping is being sold by Tube Turns, division of Chemetron, Louis ville» Ky. Called the Pipe-Mate line, the tubes will be stocked in 1 / 2 to 4 in. sizes, schedule 5 S and 10S, in those stainless steel grades that the firm says are best suited t o corrosion use. Ε 8 • High capacity fraction collector for
chromatography is available from Chi cago Apparatus, Chicago. Collector uses a photocell to measure liquid, and it can b e fitted with a unit that counts up to 10 drops a sec. Typical capaci ties include 600 fractions of up to 5 ml. each, 350 u p to 3 0 ml. each, and 150 fractions up to 6 0 m l Ε9
• Synthetic s a p p h i r e w i n d o w s for in frared, ultraviolet, and microwave uses are being made in diameters up to 5 in. by Linde, division of Union Carbide, New York. A 5 in. window is valued at $1000. In finished form, the win dows have wide band electromagnetic transmission, plus hardness and strength at higb temperatures, the company says. Ε5 ί Bottle holder-carrier by Protectoseal, Chicago, is surrounded by poly ester-based urethane padding. All shocks caused by bumping, knocking, or dropping are absorbed by the pad ding, thus preventing injuries to han dlers. Ε6 • Boron trifluoride neutron detectors
in cathode materials like copper, brass, and stainless steel are now being made and sold by Nuclear-Chicago, Chicago. Sizes include 42 in. long, small diam eter probes and commonly joined mul tiple t u b e units. Ε7
• P o r t a b l e v a p o r pressure thermom e t e r t h a t can be filled and moved from place to place has been developed by Delmar Scientific Laboratories, Chi cago. Ε 11 j I I
Further useful înformaiion on keyed Equipment items menHoned is readily available . . .
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April 27, 1 959
Readers' Information Service
foils
which enable comparing the results of various radiation effects studies are be ing offered by Aerojet-General Nucle onics, San Ramon, Calif. Foils can be used to correlate either single or mul tiple reactor system studies. Foils available include gold, cobalt, plutonium-239-, uranium-238, sulfur-32, aluminum-27, and modified foils less ex pensive than these. Ε4
• Continuous b o r a n e analyzer, devel oped by Mine Safety Appliances, Pitts burgh, Pa., monitors airborne boranes in concentrations less than 0.01 p.p.m., according to the company. T b e unit works t>y measuring new iodine it forms to make u p loss when boranes react vvitJh iodine in a scrubber. € 1 0
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