It’s Time for Canning in the Tennis Factories
This is the season for canning cornâ€”and tennis balls. Above, balls being packed in cans to keep them “live”
Thousands of Americans are smashing tennis balls overâ€”and into nets in parks and club grounds and thousands more are engaged in busy factories where rackets, balls, nets and equipment are produced. What you see, above, is not a parking lot for balloons but hundreds of tennis ball centers on drying racks in a factory. They have been coated with cement and are awaiting the proper moment for being covered
Above, a final stage in manufacture of tennis balls; putting on outer covering, sewing and “spooling”â€”ironing the seams down. Below, at right, the beginning of a tennis racket. Here a factory worker is bending strips of ash into shape. Rackets must conform to high standards as to weight, balance and stress
Very cool. This article was written back when they still had a big network of pneumatic tubes connecting all of the post offices in Manhattan.
What Happens When You Mail a Letter
By Herbert O. Johansen
With the Christmas rush on, the complex network of men and machines that speeds the mails is working in high gear.
WHEN you drop a letter in a mailbox and hear the slot lid click, you probably give the lid a couple of extra flips for good measure. In return for that effort, plus licking the stamp, you take it for granted that your message of love, business, sorrow, cheer or complaint will be delivered to the right person at the right place in the shortest possible time.
And it almost certainly will beâ€”along with the other 127,677,738 letters that are mailed in the United States on an average dayâ€”enough letters, if their envelopes were laid end-to-end, to reach from New York to Shanghai.
Stitching Steel Into Streamliners
Budd’s new assembly line rolls out cars like cans.
By MORTON C. WALLING
AS YOU stand on a catwalk high above the plant you can scarcely see where it ends, dim in the distance, five city blocks away. The workmen dwindle to mere specks, the gigantic U-shaped welders become tiny tweezers. Toward you stretch three long, silver caterpillars: assembly lines. Here and there comes a flicker of blue flame from an arc welder, reflected and reflected again from shining stainless steel. Occasionally there is a rumbling medley of thumps from shot welders; otherwise there is only a low hum from the thousands of workmen and machines.
Here is modern technology in actionâ€”the assembly-line system the auto industry made famous. But as the great cranes swoop down along the line and the silvery bodies roll nearer and nearer you can see they are too shiny for automobilesâ€”and too big. Each is as long as half a dozen motor carsâ€”a stainless steel railway coach.
Prehistoric Monsters Roar and Hiss for Sound Film
THIS remarkable article tells you how the ingenuity and skill of motion picture directors solve the hard emblem of putting on the screen the forms and noises of animals that have been extinct thousands of centuries
by Andrew R. Boone
FROM the slime of tropical mud flats, the ghost voices of prehistoric monsters have reached the screen. Hisses and grunts of the pterodactyl and brontosaurus; roars from a tyrranosaurus, largest of the dinosaur family; groans and roars of an imaginary giant ape are reproduced by mechanical contrivances.
Kong, the ape, crashed through the heavy growth of an unknown forest, uttering fierce growls and beating his breast in rage. As the scene unfolded in silence before a small group of us in a tiny projection room, the studio sound experts discussed ways and means of re-creating his awful voice and the solid thumps of clenched hands against the massive chest.
How JIG-SAW PUZZLES Are Made by the Million
PUTTING jig-saw puzzles together is the latest craze to sweep over America. It has replaced the cross-word puzzle, the Tom Thumb golf course, and in many places has ousted contract- bridge. On this page are photos showing the steps in the manufacture of the millions of jigsaw puzzles sold each week.
MATCH-MAKING – From LOG To LIGHT
by LIEUT. DON BENN OWENS
FORTY-ODD years ago, more than 1,500 persons, laboring 16 hours a day, were needed to turn out 2,000,000 finished match boxes. Today, with modern match box making machinery, two persons are capable of producing an identical number of match boxes in an eight-hour day.
Similarly, the modern match-making machine, requiring the services of but four workmen, turns out more than 100,000,000 finished matches in a single workday!
More striking, perhaps, is the fact that 3,000 odd persons on the payroll of the match manufacturers in this country, in 1929 earned for their employers more than $19,500,000.
How PHONOGRAPH RECORDS are made
PSM Picture Story by ROBERT F. SMITH and HARRY SAMUELS
THE silent black disk that makes noises when needled is chiefly shellac, lampblack and limestone. In its manufacture, however, pure gold, wax, glass, copper, nickel and sometimes chromium are used by the craftsmen who operate the intricate and delicate machines that squeeze sound into a scratch.
From beginning to end, the commercial manufacture of records is a tremendously exacting process. For example, 50 percent of the wax-coated glass disks on which the music is recorded are rejected before reaching the cutting room. The accompanying pictures tell the story.
Radio Robot Squirts Out 3 a Minute
A COMPLETE radio set every 20 seconds is the production goal of this new British automatic machine known as ECME (Electronic Circuit Making Equipment). Nearing completion at the research laboratories of Sargrove Electronics, Ltd., this automaton uses the sprayed-circuit technique to do the jobs of a double line of skilled workers. Wiring mistakes are eliminated, and the machine even makes its own tests, signaling the location of any defects in the circuit.
Plastic plates are fed into each end of the two parallel rows of electronic units shown in the photograph at the top of p. 160. As the plates move down the line, all the necessary inductances, capacitors, resistors, and potentiometer tracks are “built up.” After lacquering, other units automatically insert rivets, eyelets, and studs. When two plates are joined together at the end of the line, they form a complete radio receiver except for a few parts such as electrolytic condensers, tubes, and loudspeaker, which are added by hand. It is claimed that the sets will be both lighter and sturdier than those made with wired circuits.
The Amazing Story of Stainless Steel
RUST which, it is estimated, causes a loss of about one billion dollars a year in this age of steel, today is in full retreat before an advance that began about a generation ago. Strangely enough, the big guns of war played a key part in the early stages of the battle.
The history of man’s attempt to conquer rust goes back almost to the time when the first iron tool was fashioned. The most important chapters, however, have been written since the beginning of the present century.
Box and Crate Engineering
That may be a recognized course of study some of these days
By WM. J. DUCHAINE
UNIVERSITIES and engineering schools, now that the war is over, quite likely will offer courses in “box-and-crate engineering.” Industrial concerns, who employ safety engineers, chemical engineers, and others with specialized training, will add experts on container construction to their staffs. Packing and shipping of postwar industrial products will become an exact science, and for no small number of college graduates it will become a profession.