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Machine gear mechanics.

Machine gear mechanics.

Winch cable wire cable, industry craft.

Airplane landing wing, transportation traffic.

Hose fire brigades.

Machine gear mechanics.

Machine gear mechanics.

Helicopter propeller blades.

Antwerpen mexicobrug bridge, architecture buildings.

Machine gear mechanics.

Interior View of the Court Yard and Frontal View of the Defense Mechanism at Chateau d'Anet

Wheellock Mechanism for a Pistol

Pair-case watch with quarter repeating mechanism

Pair-case watch with repeating mechanism

Design for a Small Stepstool with Front Casters (verso: sketch demonstrating folding mechanism)

Drawing of Fan Moved by Mechanism

steering mechanism from "[A Residence on the Shores of the Baltic. Described in a series of letters. [By Elizabeth Rigby, afterwards Lady Eastlake.]]"

[Paddle wheel mechanism of side-wheel steamer]

One of the wonders of the age. The first electric street railway in Massachusetts! Have you seen it? If not take a car of the East Middlesex St. Railway Co. and ride to Revere Beach and there connect with the electric road. a marvel of mechanism

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Breech Mechanism Department (Navy Yard), Washington, D.C., U.S.A.

Gate mechanism at Sault Ste. Marie locks

Mechanism Berry airship, St. Louis

View of electric stop motion, a mechanism enabling a weaver to produce perfect cloth. Silk industry, South Manchester, Conn., U.S.A.

View of electric stop motion, a mechanism enabling a weaver to produce perfect cloth. Silk industry, South Manchester, Conn., U.S.A.

Chemical Warfare Service - Plants - Edgewood Arsenal - Manufacturing gases at Edgewood Arsenal, Maryland. Shell filling mechanism

Airplanes - Instruments - Aeroplane material manufactured for government use. Tel-tachometer and assembled interior mechanism. National Cash Register Co. plant, Dayton, O

Chemical Warfare Service - Plants - Edgewood Arsenal - Manufacturing gases at Edgewood Arsenal, Maryland. Shell filling mechanism

Airplanes - Ordnance - Sectional diagram of C.C. Gun synchronizing mechanism complete. Dark red illustrates oil under pressure. Shaded red denotes low pressure. Bureau of Aircraft Production, Dayton, Ohio

Airplanes - Instruments - 25,000 foot altimeter. Richard (French) type view with case complete as it appears on instrument board and mechanism exposed separately. Made by Aero Instrument Corp., New York City

Airplanes - Parts - Engineering Plant, College Point, L.I. Installing mechanism in aeroplane bodies. From C.P.I

Airplanes - Parts - Plant manufacturing automobile parts for government use. Rear view of stabilizer elevating gear mechanism for the De Haviland 4 airplane, manufactured at Schweppe & Wilt Mfg. Co., Detroit, Michigan

Airplanes - Instruments - Close view of the mechanism of the aero altimeter. It consists of 35 parts. Under the action of atmospheric pressure the chamber A rises and carries up arm B which in turn communicates its movement to segments D by means of levers C, the movement laterally of segment D causes pinion and staff E to turn and carry around the hand which is fastened upon the top of E. Made by Aero Instrument Corp., New York City

#6156 16" BC Boring Holes for Elevating Mechanism

The latest in electric baseball scoreboards. George Coleman, inventor of Wash., is shown with the mechanism of the new scoreboard

Midshipmen of the U.S. Naval Academy, (Ist year men) being carried by boat to the plane in which they take daily flights and study each and every part of the mechanism. These are the first men to receive this training under the recent orders, providing for a course in aviation

If you happen to be commander of a Navy ship you will be happy to know about this new piece of mechanism. It is the result of the combined efforts of various branches of the Navy Dept. It is a theodolite (compass for measuring the horizon) that will be used on Navy ships. Mr. R.L. Currie of the aerological office Bureau of Aeronautics, Navy department is shown with this instrument which will be used to site pilot balloons sent from shipboard for the sake of gathering weather information

Electrical door locking and operating device, Figure 4: Mechanism assembly.

A young soldier of the armored forces holds and sights his Garand rifle like an old timer, Fort Knox, Ky. He likes the piece for its fine firing qualities and its rugged, dependable mechanism. Infantryman with halftrack

A young soldier of the armored forces holds and sights his Garand rifle like an old timer, Fort Knox, Ky. He likes the piece for its fine firing qualities and its rugged, dependable mechanism. Infantryman with halftrack

Infantryman with halftrack, a young soldier of the armed forces, holds and sights his Garand rifle like an old timer, Fort Knox, Ky. He likes the piece for its fine firing qualities and its rugged, dependable mechanism.

A young woman employee of North American Aviation, Incorporated, working over the landing gear mechanism of a P-51 fighter plane, Inglewood, Calif. The mechanism resembles a small cannon

Infantryman with halftrack, a young soldier of the armed forces, holds and sights his Garand rifle like an old timer, Fort Knox, Ky. He likes the piece for its fine firing qualities and its rugged, dependable mechanism.

A young woman employee of North American Aviation, Incorporated, working over the landing gear mechanism of a P-51 fighter plane, Inglewood, Calif. The mechanism resembles a small cannon

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Open hearth steel is also made at this plant. Workers here shown are completing the charge to an open hearth furnace which has a capacity of about 100 tons per heat. Only small quantities of materials are charged by hand in this way. The bulk of the material is charged by the mechanism shown in pictures nos. D-995 and D-994

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Open hearth steel is also made at this plant. Raw materials are charged into an open hearth furnace by means of this charging mechanism. The open hearth furnaces have a capacity of about 100 tons of steel per heat

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Open hearth steel is also made at this plant. Here a worker sits at the controls of the charging mechanism for loading materials and elements into the furnace. This open hearth furnace has a capacity of about 100 tons per heat

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

Antiaircraft gun carriage. A worker tests the smooth working precision of the elevating mechanism assembly of a thirty-seven-millimeter anti-aircraft gun carriage. Planes of 300 miles an hour and better present a fast-moving target which requires precision operation in the anti-aircraft gun that must follow their flight to protect America's lives and property. War program production scene in a Pennsylvania heavy industry plant. AETNA. Ellwood City, Pennsylvania

Antiaircraft gun carriage. Assembling the elevating mechanism of a thirty-seven-millimeter antiaircraft gun carriage. This and other control mechanisms of an anti-aircraft gun mounting must operate as easily as your automobile controls so that the gunner may stay trained on his swiftly moving target. War program production scene in a Pennsylvania heavy industry plant. AETNA. Ellwood CIty, Pennsylvania

Antiaircraft gun carriage. Assembling the foot firing mechanism on a thirty-seven-millimeter antiaircraft gun carriage. The gunner requires both hands to follow his swiftly moving target, and must get in as many shots as he can while the target is still within range. War program production scene in a Pennsylvania heavy industry plant. AETNA. Ellwood CIty, Pennsylvania

Production. Diesel engines. The valve mechanism of a diesel engine for the Navy is adjusted at a Midwest manufacturing plant

Antiaircraft gun carriage. The elevating mechanism is assembled on a thirty-seven-millimeter antiaircraft gun carriage nearing completion. Care and precision is the watchword in the assembling of these mechanisms. A 300-mile-per-hour target requires a precision instrument to allow the gunner to stay with it. War program production scene in one of Pennsylvania's heavy industry plants now converted to the production of vitally needed military equipment. AETNA. Ellwood City, Pennsylvania

As a test, three rounds of primers in empty shell cases are fired in each howitzer to check the breech mechanism. The firing is pictured. These seventy-five millimeter pack howitzers are being manufactured at the Erie, Pennsylvania, General Electric plant, largely on machinery formerly used for making streetcar motors

Antiaircraft gun carriage workers. Workers assembling the elevating mechanism of one of America's many new thirty-seven-millimeter antiaircraft gun carriages. These guns will soon take their place in the protection of our soil against the best-armoured and the fastest-flying planes that our enemies can produce. Scene in a Pennsylvania engineering plant now converted almost entirely to America's war program production. AETNA. Ellwood City, Pennsylvania

Mitchell Field. The eagle puts foot to earth. An air-crew officer dressed in full combat gear inspects a bomber landing wheel. Part of the retracting mechanism is shown

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

Production. Airplane propellers. Finished stationary cams for the hydraulic mechanism that adjust the pitch of airplane propeller blades while planes are in action. The Hartford, Connecticut, plant, where they are stored in turning out great numbers of two- three- and four-blade propellers

Production. Airplane propellers. Two-way spider forgings for Hamilton airplane propellers in the rough store department of a Hartford, Connecticut, plant. After precision machining these spiders will hold a two-blade propeller assembly in the hydromatic mechanism that controls the blade pitch during flight

Production. Airplane propellers. Assembled three-way Hamilton propellers ready for shipment, minus power section, from a Hartford, Connecticut, plant. When installed on a warplane, this type of propeller will be fitted with a hydromatic mechanism that varies the blade pitch during flight

Mitchell Field. Business end of a bomber engine. The controllable pitch housing in the propeller hub assembly contains the mechanism that automatically adjusts the set of the three propellers

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

Women in industry. Aircraft motor workers. Using a small rotary air grinder, this young employee of a Midwest aircraft motor plant performs a delicate job on a gear spacer that will see duty in the mechanism of one of America's battleships of the air

Conversion. Merry-go-round plant. These hands used to turn out merry-go-rounds to gladden the hearts of the nation's children. The carrousel plant in which they work is now engaged in producing war parts on subcontracts from army and navy contractors. Above is a completed shell ejector getting its final testing. The brass bottom of a navy shell is applied on the testing stand, with the spring mechanism which actually ejects the shell getting the primary test. Spillman Engineering Company, North Tonawanda, New York

Production. Airplane manufacture, general. This woman employee of North American Aviation's Inglewood, California, plant, assembles the wing flap mechanism for a B-25 bomber. This plant produces the battle-tested B-25 ("Billy Mitchell") bomber, used in General Doolittle's raid on Tokyo, and the P-51 ("Mustang") fighter plane, which was first brought into prominence by the British raid on Dieppe

Mitchell Field. Business end of a bomber engine. The controllable pitch housing in the propeller hub assembly contains the mechanism that automatically adjusts the set of the three propellers

On the "assembly" line. Scores of parts go into Uncle Sam's big guns. Worker at a large eastern arsenal inspects some of the mechanism parts for medium-caliber guns. The utmost accuracy is required to ensure efficient performance

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

A poster comes to life. The men pass the scrap charge for a battery of open-hearth furnaces, piles into small buckets which are emptied into the furnaces by an electrically operated shoveling mechanism. The line of buckets at the left shows what is happening to the auto hubs, axles, and drive shafts which a few months ago were strewn over the countryside in auto graveyards. The bucket-line at the right contains mill waste, which is carefully saved and reused

Herbert Rudolph James, machinist, Shell Finish Department, National Tube Company, McKeesport, Pennsylvania, has been awarded a Certificate of Individual Production Merit. Mr. James is by profession a musician--organist and conductor. At his suggestion a mechanism was incorporated into the torch whereby the oxygen and acetylene mixtures could be varied to create the desired flame

Mitchell Field. Business end of a bomber engine. The controllable pitch housing in the propeller hub assembly contains the mechanism that automatically adjusts the set of the three propellers

This landing gear mechanism for a North American P-51 fighter resembles a small cannon

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

War alarm clocks. 1,700,000 of them will be produced this year to meet demand that was normally 12,000,000. Will be distributed by all pre-war alarm clock manufacturers. War alarms are of the hand-wound type, not nearly as durable as pre-war models. The case, about 6 x 6 x 2 1/2 inches, is of molded pressed wood and paper pulp. Mechanism contains only about 1/10 ounce brass and 6 1/2 ounce of steel, compared to pre-war average use in the low-priced alarm clocks of 6 and 13 ounces respectively. For this reason, and since the programmed supply for the year will barely cover the needs of workers in directly war-essential occupations, War Production Board (WPB) has requested that no one buy a war alarm unless it satisfies real need, not merely want, wish, or whim

Production. Airplane propellers. Arthur Voss checks angles and makes final dimensional inspections of a propeller blade for an American warplane at the Hartford, Connecticut, plant. This blade will later be mounted with others in a hydromatic mechanism that will permit adjustment of pitch while planes are in action

Anaconda smelter, Montana. Anaconda Copper Mining Company. Cars containing fifty tons of copper ore are dumped by an unloading mechanism into a 200 ton hopper

Anaconda smelter, Montana. Anaconda Copper Mining Company. Brakeman setting the brakes on an ore car in the unloading mechanism which will dump the ore into a 200 ton hopper

A vacuum mechanism for inserting discs is an important unit in the machine setup of a converted cash register factory now producing 20mm fuses in enormous quantities

A North American employee assembles the landing gear mechanism inside the nacells of a B-25 bomber

Production. Airplane propellers. Propeller blades that will soon be driving American warplanes are stored after final dimensional inspections at a Hartford, Connecticut, plant. The various blades will later be mounted, in sets of two, three, and four in the mechanism that will permit adjustment of pitch while planes are in action

Inspectors instructed. Student inspectors learn the ins and outs of their trade at an eastern arsenal. The mechanism under discussion is that of a 37 mm gun anti-aircraft carriage, M-3, one of the army being turned out for war work

Conversion. Soft drink dispenser plant. Now converted to production of war essentials, this Eastern plant once manufactured such civilian items as this soft drink dispenser, the precision mechanism of which is undergoing inspection by a designer. It was this type of high grade precision workmanship which enabled the company to obtain specialized precision contracts and subcontracts from the government. Bristol and Martin Company, New York, New York