High-Duty Copper-Lead Bearings
A Better High Temperature Combustion Boat Por 33/4
C. H . S. Tupholme, 65 Kinnerton St., Knightsbridge, London, S. W. 1, England
DETAILS
of a new German process for
making high-duty bearings of lead and copper have been disclosed in Britain. Bearings of this type usually consist of a supporting steel shell into which a thin lining of the alloy is cast. Owing to the difference between the melting points of copper and lead a homogeneous distribution of the particles is difficult to obtain. The cast layer must be relatively thick and machined to size, necessitating the discarding of sometimes as much as 95 per cent of the alloy in the form of risers cut from the casting. The total wastage is 10 to 20 times the weight of the machined lining. The new process employs one or more layers of copper wire gauze of a suitable wire diameter and mesh which are tinned and impregnated by dipping in a bath of molten lead. The result is a copper-lead lining having a controlled structure and a ratio of copper to lead varying from 20:80 to 50:50. Lower percentages, ratios of 85 copper to 15 lead, are obtained by rolling and flattening the gauze, thereby reducing the distance between the wires Tin, phosphorus, or beryllium copperbronze may be substituted for ordinary copper gauze, or the lead may be alloyed with antimony, bismuth, tin, sodium, or calcium. It is claimed that, whereas in
normal practice 20 to 90 per cent of bearings may be scrapped after x-ray examination, the new process dispenses with the need for a thorough inspection of the finished article as every bearing is automatically made of a predetermined and regular structure.
Film Traces Chemical Advances A
FULL Cinecolor and sound motion picture, "A New World through Chemistry", released by du Pont, traces the evolution of nylon textile fiber and hosiery, plastics, dyestuffs, Zelan durable water repellent, and rayon from the laboratory through processes of manufacture into actual use. Settings include du Pont laboratories and plants factories of du Pont customers who convert the materials into household and personal necessities, and Hollywood scenes demonstrating practical everyday uses. The film, produced by Scientific Films, Inc., is offered for club and school showing through the Motion Picture Bureau of E. I. du Pont de Nemours A Co., Inc., Wilmington, Del. It may be borrowed without charge in 16-mm. size on an 800foot reel or 35-mm. size on a 2000-foot reel.
Does not fuse to tubes—retains original shape. Die formed, has straight tides, smooth flat bottom and dimensional uniformity. Thick base prevents penetration of sample—large inside area lets sample flow freely to form a thin layer. Used with a cover the boat fits a Ji inch combustion tube. Sample boat and cover will Le sent without charge on request. S-21SM t a m a t Hie* T t « p t t a t w t C M k u t t M Beet. P«r 100 6.30 P«r 500 23.00 Pw 1000 37.30 S-Sltte C«vtf Omly. P«r 100 6.50 P«r 500 25.00 P«r 1000 37.50
E. H. SARGENT & CO. Scientific Laboratory Supplies 155-1IS B. Superior Stare*! Chicago, Illinois
TUWALL STREET of CHEMISTRY Earnings of Chemical Companies N I N E M ONTHS
19V) Air Reduction Co. American Agricultural Chemical Co. (loss) Atlas Powder Co. Bausch A Lomb Optical Co. Catalin Corp. Consolidated Chemical Industries Copperweld Steel Co. Corn Products Rehning Co. Ferro Enamel Corp. Freeport Sulphur Co. General Electric Co. General Foods Corp. Harbison-WtJker Refractories Co Hercules Powder Co. Johns-Man ville Corp. Libbey-Owens-Ford Glass Co. Mathieson Alkali Works Owen*-Illinois Glass Co. (12 months) Penick A Ford Procter A Gamble Co. Texas Gulf Sulphur Co. Union Carbide A Carbon Corp. Victor Cheuiical Works Westiaghouse Electric A Mfg. Co.
$
....
SEPTEMBER QUARTER
SEPTEMBER (j•lARTKM PER ( OUUO.N; S H A R E
19',0
1939
1940
1939
$ 1.695,373 117,842 38i\743
$0.50
....
$1,291,816 94.633 381.929
831.842 1,133,899 114.414 412.108 610.549 7.072. H38 308.850 1.038.211 25.022.631 11.964.416 916.900 3.646.561 2.675.999 3.W2.516 624.767 7.460.253 911.347
$ 1,127.261 1.369.575 143.181 557.K15 798.736 6.069.016 319.042 2.314.436 37.094.776 9.906.987 1.540.000 3.744.236 3.530.544 7,314.781 1.250.240 8.048.406 606.394
5.014.295 19,151.730 735,784 9,069.810
7.258.736 30.976,728 848.408 14,583.327
963
195.891
168.898
42.384 383.216
...
4.389.832 518.200
69.848 816.625
•
2,892.361 601.000
....
1.472.255
1.6*3,567
463.398
422.700
342.384 b.951.841 1.749.469 8.400.326 298.801 2.731.023
138.297 4.589.992 2.757 763 11.004.553 362.563 4.746.315
l.!9 2.31 0 21 0 54 2 28 0.22 0.48 0.87 0 84 0 35 2 47 1.58 1.56 0.51 2.81 0 93 1 06 0 45 0 92 0 43 1 02
1940 $0,625 1 * 19 2.84 (9 0.26 (9 0 47 1.38 (9 1 89 (9 0 30 1 02 1 29 (9 0 55 0 41 2.54 (9 1.80 2.91 (9 0.46 3.02 0 37 0 69 0 72 1 19 0 52 1 77
months) months) months) months) months) months) months)
