Models include: RO-70, RO-60, RO-50, RO-40, RO-20, RO-10, RO-35, RO-30, RM-3 and RM-4.

Models highlighted:
WLW1020L
WLW11OOL
WLW11OOL
WLW1600L
WLW1600L
WLW1600U
WLW1600U
WLW1630L
WLW1630L
WLW1630U
WLW2020L
WLW2020L
WLW2100L
WLW2400L
WLW2400U
WLW2600L
WLW2600U
WLW2600U
WLW2600U
WLW2620L
WLW2620L
WLW2620L
WLW2620U
WLW2620U
WLW2625U
WLW2630L
WLW2630L
WLW2630L
WLW2630U
WLW2630U
WLW4800L
WLW4800L
WLW480SL
WLW4820L
WLW4820L
WLW4830L
WLW4830L
WLW4900L
WLW4900L
WLW4950L
WLW5000L
WLW5000L

GSD2800D
GSD2600D
GSD2200D
GSD900D
GSD600D
GSD400D

How the Loudness of Sound is Determined When Evaluating Electric

Absorption Spectroscopic Analyses of Rubber Materials

Short Range Telemetry System Provides Test Data on Rotating Parts

Patent Searching

Whirlpool First Spray-Arm Dishwashers:
FU60, FU60-1, FU60-2, FU70, FU70-R, FU70-1.

Portable Top-Loading D&M Impeller Models:
FP20, FP20-1, FP50, FP50-1

Refrigerators
Space King Twins & Freezers
Built-in Ovens
Continental Ranges & Platforms
Free Standing & Slide-in Ranges
Built-in Dishwashers
Water Heaters
Compact Kitchens
Food Waste Disposers
Heavy Duty Automatic Washers, Electric and Gas Dryers
Coin-Operated Washer and Dryer
Cabinets for Kitchen and Laundry
Commercial Institutional Host Products
Type Y Year Round Air Conditioning System
Room Air Conditioners
Total Comfort System Cooling
Heat Pump & Electric Heating
Filtering & Dehumidifying
Commercial & Residential Lighting
Distribution Transformers
Elevators
Micarta® Countertops

10LW40, 10LW43, 10LW44, 10LWS44, 10LW45, 10LWW45

WASHER: WA28F2WT WA28M2WT WA28M4WT WA28M6WT
DRYER: DE/DG28T3WT DE/DG28ASWT DE/DG28A7WT

Hotpoint's Productgrams were produced monthly to keep service personnel up to date with new products, appliance specifications, appliance service instructions, troubleshooting procedures, older product repair and parts changes, installation instructions, customer complaints and recommendations, testing procedures, tools for repairs, wiring diagrams, timer charts, appliance history and evolution and other important information regarding their appliances.

Very cool article on GM Frigidaire appliance designers and how they work together in an atmosphere of creativeness.

Maytag introduces their Halo-of-Heat dryer.

GE Kitchen Center wins awards for GE designers and engineers.

Surprising number of new appliances at Chicago Summer Market show.

Editorial: The Fourth of July

New Switchgear Laboratory Goes into Operation
Late last month on the flatlands of southwest Philadelphia, GE’s new high-capacity switchgear development laboratory was officially dedicated. With Company spokesmen looking ahead to an annual U.S. power consumption of possibly a trillion kw-hrs by 1965—more than triple the amount now being used—the new laboratory will aid in the development of switch- gear of higher ratings to keep pace with this phenomenal growth. continued…

Engineering the Automatic Washer
The automatic clothes washer is a simple device—to the housewife. She throws in the laundry, sets a control dial, and goes about her telephoning. A short time later she removes the laundry—washed and damp-dried.

Simply stated, the function of a domestic washing machine is to get the laundry clean, rinse out the detergent, and extract most of the water. For a third of the century these operations were performed with a machine in which the laundry was manually lifted from the tub and fed through a water- extraction device. Most of these devices were wringers, powered by the washing- machine motor. A limited number were the centrifugal-extraction type using the same or a separate tub. continued…

Stopping Ships
Even with modern navigating and communication aids there are times when things get out of hand and a collision ol ships appears imminent. The need for meeting this situation—rare though it may he—has an influence on the design of ships’ power plants.

Most large and fast ships are powered bv a steam turbine that drives the propeller through suitable gearing and shafting. The astern power that is used for stopping a ship is provided by a comparatively small separate section of the main turbine. The question immediately arises as to why the astern element can’t be given the same power as the ahead element. Well, it can. The simplest arrangement would he another turbine of the same size geared to drive the propeller backwards. continued…

Ferromagnetography
Contrary to general belief printing did not originate with Gutenberg; to the ancient Chinese belongs the credit. They made engravings—used mainly for printing on silk cloth—by carving figures out of wooden blocks. Later, around 1120 BC. they introduced wooden blocks of movable type.

Modern printing, on the other hand, began in the middle ages—about the year 1423. It was during this period that Johann Gutenberg, a German stonemason, had the idea of printing with movable type. So he set about his skill, cutting alphabets out of small wooden blocks to be used for typesetting. A friend advised him to use metal instead of wood, since it wouldn’t wear out so easily. This he did. As you can imagine, this task required many years and a large expenditure of money. He financed his operations by borrowing money on the type he’d already completed. Then, to prove to his creditors and the many cynics the worth of his efforts, he completely reproduced the Bible in print. continued…

Cool Breezes — Story of the Electric Fan
Fans preceded written history by many centuries. Some of the most ancient known fans were those of the Chinese dating back to 3000 BC. And ceremonial fans were used in 1700 BC by the reigning monarchs of Egypt and Assyria. Some thousand years later the "punkah" —a hand-swung lightweight ceiling-suspended fan—was introduced in India, and even today is still in use there.

From exquisitely made folding tans of the Japanese, followed by 17th century Paris creations of surpassing beauty, we come to the practical palm-leaf type and simpler folding fans of grandmother’s day.

It’s not possible to give the exact age of the electric fan—the youngest member of the ancient family of fans. But the earliest record of a U.S. patent awarded for an electric fan was in 1854. This was a ceiling-suspended assembly of several large fan blades, each hinged along one edge to a horizontal rotating arm driven by a battery-operated motor. Arms on the blades struck projections causing the blades to vibrate and thus agitate the air. continued…

Longer Life for Dry-type Transformers
Improvements in dry-type power transformers and their insulations is a good example of how electrical engineers are continually making progress in lengthening the life span of electric equipment and increasing its endurance to higher temperatures.

For many years insulations known as Class A were about the only ones available to the transformer designer. These insulations consisted of materials such as cotton, silk, or paper—impregnated with organic varnishes to give them additional mechanical and electrical strength. They were used in a medium of mineral oil or air. Such insulations were relatively inexpensive but a maximum allowable temperature limit of 105 C was necessary for reasonable life. continued…

The G10 Germanium Rectifier
In 1886 a German chemist by the name of Alexander Winkler found an unknown metal sulfide and isolated the element which he called germanium. It has a shiny metallic appearance, is extremely hard and brittle, and is recovered as a by-product in the smelting and refining of zinc ores.

Because germanium falls into group four of the periodic table, it has some of the chemical characteristics of the elements on either side of it. Germanium is both an electrical conductor and an electrical insulator, depending on its temperature, and is classed as a semiconductor. continued…

Nylon for Bearings and Gears
Although nylon is generally associated with such decorative items as stockings and sweaters, we have found that its versatility extends well into the fields of bearings, gears, and other workaday applications.
Nylon is tough at low7 temperatures, is resistant to abrasion, has strength in thin sections, is light in weight, has certain self-lubricating qualities, and is resistant to many chemicals. Properties are given in the table on the opposite page. Exact characteristics and specifications can be found in the literature put out by the manufacturers of nylon molding powders.

Bearing Tests - Of interest to design engineers is published data that shows the effect of wear on nylon when used as a bearing material. Results of tests using nylon against nylon, steel, and brass under various loads and speeds, and with various lubricants, are given on page 35. As you may suspect, the lowest rates of wear are found when nylon is run against nylon in a dry condition, as well as when nylon is run against steel lubricated with SAE 10 oil. When nylon is rubbed against brass, the metal flakes off and contaminates the hearing surface. continued…

The Unit Cost of Light
There’s more to figuring the cost of a lighting system than adding up the prices of fixtures, installation, and electricity. A tabulation of over-all annual costs that the customer may expect to pay appeals to the businessman, because it is expressed in his own language. Rut further analytical cost studies of operating and maintenance methods and lamp efficiencies may show you the way to worth-while savings or better lighting for the same expenditure.

To help you along this economic pathway a relatively simple formula has been devised. It is referred to as the "unit cost of light” method. In its most flexible form it deals with the raw light as generated by the lamps in just one fixture. Then, once the unit cost of light in dollars per million lumen hours is known, you can easily apply it to a specific installation if over-all costs are also desired. continued…

Added Kick for Turbojet Engines
Getting an 80-ton airplane into the air in a matter of seconds is no easy job. The problem is one of providing more than normal maximum thrust or "kick” at take-off. In the case of B-45 and B-47 jet bombers, their power plants (J-47 turbojet engines—one is shown on the adjacent page) were equipped with combustion-chamber water-alcohol injection systems for augmenting thrust.

Variations of these systems boost the take-off thrust from 15 to 25 percent or higher. As a result, heavy jet-powered aircraft can take off from minimum- length runways with maximum safety. continued…

Are We Ready for Railroad Electrification in the U. S.? .
Admittedly, widespread electrification in I lie United States is not just around the corner. Rut there is an element in the cost of railroad electrification and in the success of operation through the ensuing years that can not be settled too soon. This all-important factor is standardization. And standardization is so important primarily because it permits repetitive manufacture. Standardization, of course, offers other advantages that may be more familiar, but every day brings new evidence that a custom-designed article built in a job shop cannot compete with a highly engineered item produced under conditions of repetitive manufacture.

It is time for all who may have a hand in railroad electrification in the United States to start sifting out the alternatives and to find agreement on what may be the standard system of electrification in this country. Let us speak briefly about the prospects of electrification and [hen expand the theme of standardization. continued…

A Brightening Outlook - When will we see railroad electrification resumed in the United States? The answer depends largely on costs, with the cost of fuel or energy being a big part of the expense of locomotive operation.

When we compare the cost of diesel fuel with the cost of purchased electric power at the figures current today, we find them roughly equivalent. We are speaking, of course, of gallons of fuel oil or kilowatt-hours of electricity at the locomotive. As long as power costs in these two forms are even approximately equal, it is obvious that the diesel- electric locomotive with its lower investment is the correct answer for new installations. At the same time this approximate equality tells us that extensive electrified systems already installed should continue to be operated. continued…

New Safeguard for Protective Coatings
You can best define a plastics material as a synthetic organic substance. At some stage of production it’s plastic— capable of being shaped; or liquid— capable of being cast. Furthermore, it’s either thermoplastic or thermosetting. If thermoplastic, it softens under heat and can he remolded. If thermosetting, it sets under heat and can’t be remolded.

Phenolic materials are thermosetting plastics. And from practically the outset of the industry they’ve enjoyed an ever- expanding market. They take many and various forms. Probably the most familiar to you are radio cabinets, telephone handsets, buttons, tube bases, mechanical parts, and so on. continued…

Dollar-sign Engineering
The photo sequence beginning on the next page will show you how a value analyst operates—step by step—on a typical project. Here, it’s the timer for the automatic clothes washer. Because space doesn't permit us to show the results of the analysis on every part of the timer, we have selected one part as being typical. (In the actual project more than 30 individual parts of the timer were analyzed for value.)

It should be emphasized that nothing was wrong with the timer when we approached the Value Analysis Unit and requested a survey. The timer operated satisfactorily and costs were in line with similar products. But. as is the case with far-sighted management, they wanted to see if it wasn’t possible to further eliminate any unnecessary costs. continued…

Moisture vs Rubber Insulation
Although rubber compounds are used to waterproof such everyday items as overshoes, raincoats, and garden hoses, rubber compounds in general can’t be considered waterproof when used as an insulation for wire and cable.

What works on raincoats may not work on cables—the basic differences are: length of exposure; effect of moisture on the electrical properties. Cables insulated with rubber compounds must withstand years of continual exposure with a consequent absorption of moisture. And moisture absorption has proved to be a contributing factor in cable failures. continued…

30" Electric Ranges
Compact 30 Drop in Ranges
Built-In Wall Ovens
Cooktops
Microwave Ovens
Frigidaire Cooking Accessories

TELEVISION
Admiral, Philco, Stromberg-Car lson, RCA Victor, Mitchell, Dumont, Capehart, Zenith,Westinghouse, Magnavox, General Electric, Motorola, Stewart-Warner, Sylvania, Crosley,Bendix, Emerson, Andrea.

RADIOS
RCA Victor, Zenith, Philco, Admiral, Bendix,Westinghouse, Motorola, General Electric,Magnavox, Capehart, Stromberg-Carlson, Emerson, Stewart-Warner, Sylvania.

RECORD CHANGER, RECORDER
Webster-Chicago, RCA, Ampro, Revere, V-M.

REFRIGERATORS, FREEZERS
Servel, Gibson, Kelvinator, International Harvester, Admiral, Philco, Pak-A-Way, Coolerator, Bendix, Deepfreeze, Crosley, Westinghouse, Thor, General Electric, Quicfrez, Norge, Hotpoint, Frigidaire, General Chef, Astral.

ELECTRIC RANGES
General Electric, Deepfreeze, Gibson, Frigi•daire, Hotpoint, Kelvinator, Admiral, Bendix,RCA Estate, Coolerator, Crosley, Thor, Philco, Norge, Westinghouse, Welbilt.

GAS RANGES
Welbilt, Norge, Magic Chef, Detroit-Jewel, Maytag, RCA Estate, Florence.

KITCHEN CABINETS, SINKS, DISHWASHERS
Apex, Crosley, Kelvinator, General Electric,Hotpoint, Cory, Tracy, Kitchenaid, American Kitchens, Youngstown, Westinghouse.

LAUNDRY EQUIPMENT
Thor, Whirlpool, Bendix, Blackstone, Hamilton, Kelvinator, Westinghouse, Maytag, Frigidaire, Easy, Hotpoint, Crosley, Simplex, General Electric, Norge, Ironrite, Apex, Conlon, Naxon, Empire, Launder-King, Handyhot, Monitor.

WATER HEATERS
Westinghouse, Hotpoint, Crosley, Norge, Deepfreeze, Duo-Therm, General Electric, Toastmaster.

HEATERS
DuoTherm, Electromode, Knapp•Monarch,Magic Chef, Arvin, Fresh'nd-Aire, Tropic-Aire, Mimar, LaSalle, Handyhot, Emerson-Electric, Electresteem.

DEHUMIDIFIERS
Berns Air King, Frigidaire, Fedders, Hotpoint,Westinghouse, RCA, Mitchell, Fresh'nd-Aire, Admiral.

SEWING MACHINES
Domestic, Free-Westinghouse.

VACUUM CLEANERS, FLOOR POLISHERS, CARPET SWEEPERS
Royal, Eureka, Lewyt, Apex, Gilbert, Westinghouse, Universal, Hamilton Beach, Hoover, General Electric, Regina, General, Shetland, Wagner, Bissell.

HOUSEHOLD APPLIANCE
Universal, Holliwood, Rotiss-O-Mat, BroilQuik, Broilking, Silv-A-King, General Slicing, Silex, Cory, Nicro, Continental, Sunbeam, Ritz, Dulane, Westinghouse, Waring, Kidde, Darmeyer, Naxon, Casco, Hoover, General Electric,Nesco, Everhot, Tropic-Aire, Knapp-Monarch,Kitchenaid, Manning-Bowman, Gilbert, Sperti,Mimar, Oster, Electresteem, Hamilton-Beach,Camfield, American Beauty, Toastmaster, General Mills, Rival, Juice King, Arvin, Durabilt,Proctor, Presto, Farberware, Wearever, Mirro, Revere, Ekco, Flint, Handyhot, Hankscraft.

SHAVERS
Remington, Rolls, Schick, Norelco.

SCALES
Borg, Detecto, Counselor, Health•O•Meter.

TYPEWRITERS
Underwood, Smith-Corona, Remington.

DOOR BELLS/ CHIME
Nutone, Rittenhouse, Edwards .

CHRISTMAS LIGHTS
Noma.

LUGGAGE

TOYS
Gilbert

CLOCKS
General Electric, Telechron, Jefferson.

STERLING SILVER
International Sterling, Reed & Barton, Gorham.

SILVERPLATED FLATWARE
Community, 1847 Rogers Bros., Wm. Rogers &Son, Gorham, Tudor, Holmes & Edwards.

ELECTRIC TRAINS
Lionel, American Flyer.

TOOLS
Skil, Black & Decker Utility, Revere, Casco.

PENS, PENCILS, CIGARETTE LIGHTERS
Ronson, Parker, Sheaffer, Norma.

PHOTOGRAPHIC EQUIPMENT
Ansco, Ampro, Argus, Weston, Kalart, Victor,Bell & Howell, DeJur, Bolsey, Polaroid-Land,Graflex, Crown Graphic, Speed Graphic, Keystone, Radiant, Dalite, Revere, Kodak.

The Legation Bathtubs
Riviera Corner Bathtubs
Riviera Recess Bathtubs
Vitreous China Lavatories/Bathroom Sinks
Enameled Cast Iron Lavatories/Bathroom Sinks
Vitreous China Closets/Toilets
Vitreous China Drinking Fountains
Duo and Duo-Line Sinks
Ledgbak and Envoy Sinks
Enameled Cast Iron Sinks
Laundry Trays and Service Sinks
Enameled Cast Iron Wash Sink and Trough Urinals
Plumbers' Brass Goods