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Welder

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Welder making boilers for a ship, Combustion Engineering Company. Chattanooga, Tennessee, June 1942.
A welder (also weldor, which term distinguishes the tradesman from the equipment used to make welds) is a tradesman who specialises in welding materials together. The materials to be joined can be metals (such as steel, aluminum, brass, stainless steel etc.) or varieties of plastic or polymer. Welders typically have to have good dexterity and attention to detail, as well as some technical knowledge about the materials being joined and best practices in the field.
Contents
1 Safety issues
2 External links
3 References
4 Further reading
//
Safety issues
Welding, without the proper precautions appropriate for the process, can be a dangerous and unhealthy practice. However, with the use of new technology and proper protection, the risks of injury and death associated with welding can be greatly reduced. Because many common welding procedures involve an open electric arc or flame, the risk of burns is significant. To prevent them, welders wear personal protective equipment in the form of heavy leather gloves and protective long sleeve jackets to avoid exposure to extreme heat and flames. Additionally, the brightness of the weld area leads to a condition called arc eye in which ultraviolet light causes the inflammation of the cornea and can burn the retinas of the eyes. Goggles and welding helmets with dark face plates are worn to prevent this exposure, and in recent years, new helmet models have been produced that feature a face plate that self-darkens upon exposure to high amounts of UV light. To protect bystanders, opaque welding curtains often surround the welding area. These curtains, made of a polyvinyl chloride plastic film, shield nearby workers from exposure to the UV light from the electric arc, but should not be used to replace the filter glass used in helmets.
Welders are also often exposed to dangerous gases and particulate matter. Processes like flux-cored arc welding and shielded metal arc welding produce smoke containing particles of various types of oxides, which in some cases can lead to medical conditions like metal fume fever. The size of the particles in question tends to influence the toxicity of the fumes, with smaller particles presenting a greater danger. Additionally, many processes produce fumes and various gases, most commonly carbon dioxide and ozone, that can prove dangerous if ventilation is inadequate. Furthermore, because the use of compressed gases and flames in many welding processes pose an explosion and fire risk, some common precautions include limiting the amount of oxygen in the air and keeping combustible materials away from the workplace.
External links
References
^ Lincoln Electric (1994). The Procedure Handbook of Arc Welding. Cleveland: Lincoln Electric. ISBN 99949-25-82-2.
^ Weman, Klas (2003). Welding processes handbook. New York: CRC Press LLC. ISBN 0-8493-1773-8.
^ a b Cary, Howard B. and Scott C. Helzer (2005). Modern Welding Technology. Upper Saddle River, New Jersey: Pearson Education. ISBN 0-13-113029-3.
^ Blunt, Jane and Nigel C. Balchin (2002). Health and Safety in Welding and Allied Processes. Cambridge: Woodhead. ISBN 1-85573-538-5.
Further reading
ASM International (2003). Trends in Welding Research. Materials Park, Ohio: ASM International. ISBN 0-87170-780-2
Hicks, John (1999). Welded Joint Design. New York: Industrial Press. ISBN 0-8311-3130-6.
Kalpakjian, Serope and Steven R. Schmid (2001). Manufacturing Engineering and Technology. Prentice Hall. ISBN 0-201-36131-0.

v?d?e Metalworking - Welding
Arc welding
Atomic hydrogen Gas metal (MIG/MAG) Flux-cored Gas tungsten (TIG) Plasma Shielded metal (MMA) Submerged arc
Other processes
Electrogas Electron beam Electroslag Forge Friction Friction stir Friction stud Laser beam Laser-hybrid Oxyfuel Resistance Spot Ultrasonic
Equipment
Power supply Electrode Filler metal Shielding gas Robot Helmet
Related features
Heat-affected zone Weldability Residual stress Arc eye
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Brazing Soldering Fabrication Casting Machining Metallurgy Jewelry
Metalworking topics
Casting CNC Cutting tools Drilling and threading Fabrication Forging Grinding Jewellery Lathe Machining Machine tools and associated tooling Measuring Metalworking Hand tools Metallurgy Milling NC Occupations Press tools Pipe and tube bending Smithing Turning General terminology Welding
Categories: Welding | Production occupations | Construction trades workers | Metalworking occupations(and so on)

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Stanley Zbornak



Stanley Zbornak
First appearance
"Guess Who's Coming to the Wedding?"
Last appearance
"One Angry Stan"
Information
Age
57
Date of birth
1928
Date of death
1993 (legal death)
Occupation
Novelties salesman
Family
Mrs. Zbornak, motherDr. Theodore 'Ted' Zbornak, brother
Spouse(s)
Dorothy Zbornak (1946-1984)Chrissy (1985-1986)Katherine (1989-1990)
Children
Michael ZbornakKate Zbornak
Relatives
Magda, cousin
Stanley Zbornak is a fictional character featured on The Golden Girls and played by Herb Edelman.
The bane of Dorothy's existence
Stan was Dorothy Zbornak's ex-husband, and was, according to Sophia Petrillo, a "yutz", which many characters (including his own mother) called him. They were married in high school in a shotgun wedding, after Dorothy became pregnant during an encounter at a drive-in movie. In one episode, they were said to have honeymooned in Miami, while in another episode, it was said to be the Poconos. He stayed married to Dorothy for 38 years of marriage, but he had affairs with his secretary, and one-night stands with a waitress and another woman. He left Dorothy after he had an affair with a flight attendant named Chrissy (Simone Griffeth), whom he later married and divorced. Stan was also married to a woman named Katherine (Elinor Donahue), but that marriage also disintegrated.
Dorothy had her own terms for him. She has called him a "dirtbag," "barfbag," and a "yellow-bellied sleazeball" among various epithets. On numerous occasions Dorothy also lamented his inconsistency at making love, namely his "timing". In fact, their first encounter that resulted in the pregnancy is said, by Dorothy, to have taken only three seconds.
Stan made his first appearance on the show in the first season, attending the wedding of his and Dorothy's daughter, Kate. At this point, Dorothy was still extremely resentful towards her ex, and confronted him after the ceremony to give him a piece of her mind. This stemmed from the fact that Stan had decided to have his lawyer call Dorothy and tell her that he was getting a divorce after leaving her, which Stan couldn't do face-to-face with Dorothy. This seemed to clear the air somewhat, and Dorothy's hatred gradually softened into mild annoyance where Stan was concerned. At one point, Stan sought Dorothy for comfort when Chrissy left him for a younger man; he and Dorothy subsequently had a one-night stand with each other, but it didn't lead to a reconciliation. In a later episode, Stan gets engaged to Katherine and Dorothy initially wishes him well. But when Sophia gets hospitalized due to pneumonia, Stan comforts Dorothy and she realizes that she still loves him. She tries to tell Stan on his wedding day, but Blanche and Rose stop her. When Dorothy meets Stan's bride-to-be Katherine and finds her to be a nice person, she realizes that her time with Stan was in the past and lets him go.
Stanley made several appearances on the show from time to time, usually showing up on the doorstep, saying his trademark lines, "Hiya babe," and "Hi, it's me, Stan", which would result in the door being slammed on his face or Dorothy uttering a cry of exasperation. Stan would come to the house whenever something had gone wrong in his life (which happened often), and needed Dorothy's shoulder to cry on. Dorothy, albeit reluctantly, would usually offer advice or words of sympathy, with the occasional barb thrown in for good measure.
Dorothy's roommates, Blanche Devereaux and Rose Nylund barely tolerated him, and Sophia Petrillo, Dorothy's mother, was downright hostile to him. This never deflated the oblivious Stan, however.
Stan was, to be candid, one of life's losers. He was a novelty salesman, and judging from Dorothy's comments, not a very successful one (among his best things sold were plastic vomit). In contrast, his brother Ted (McLean Stevenson) is a very successful doctor who owns several shopping malls. Ted revealed that he had a crush on Dorothy and kissed her, which made Stan jealous. But when Ted asks Dorothy to babysit kids belonging to a woman whom he wants to date, Stan is overjoyed, while she is offended. Dorothy agrees with Blanche, who also had one date with Ted, that he is a jerk.
Accentuating Stan's cheesy persona was the fact that he donned a thick mustache and an obviously fake toupee for much of the first season. Both were gone later on in the series.
Stan was childish, selfish, and vain; even his own mother disliked him (though she pretended to pamper him). The one good thing about his life was his marriage to Dorothy, which he threw away (a fact he has lamented more than once). Late in the series, Stanley became successful, due to his invention of the "Zbornie," a baked-potato opener. He became president of his own company, Zbornco, which took the Zbornie international, namely to Japan. Even when he managed to persuade Dorothy to remarry him, he ruined it by asking her to sign a pre-nuptial agreement. Dorothy told her guests that the wedding was off, because she "didn't want to make the same mistake twice."
After ruining his second wedding with Dorothy, Stan decided that he would go to therapy to try to get some form of closure. He said that if Dorothy joined him on a session it might help him get over her sooner. Dorothy reluctantly agreed, however, as soon as they started the session Stanley started begging Dr. Halperin to help them - or, actually, him - "put this crazy marriage back together." After being yelled at by Dorothy he accidentally said 'Sophia' instead of 'Dorothy' while trying to proclaim his love for her. Dr. Halperin says that he made the same slip-up in an earlier session and concludes that Stan really wants to be nearby Sophia who "represents Stan's own mother who passed away before the two of them could resolve things." After Dorothy lied to get Sophia to the therapy session she reluctantly tells Stan that the one time she loved him was when baby Michael Zbornak was being wheeled out of the hospital. She says that she loves him for that one moment when there was a whole happy future in his smile. Dr. Halperin eventually managed to get Stan to transfer his love for Dorothy to a fake monkey (a traffic cone with carpeting and a monkey head) which he had such an attachment to that he named it Fifi, didn't allow anyone anyone to get near it, took it to play bridge, and even set it at "a separate table with the other wives" at a Japanese investment meeting. Dorothy resented the monkey because of his sick attachment to it. She stated "I had to ride in the back seat all the way over! Stan said the monkey called shotgun." As the final step in their treatment, Dr. Halperin suggests they spend two years apart, which Dorothy is thrilled about. This is short lived, however, because a few days later Stan is found in bed with Dorothy's sister, Gloria, who was visiting after losing all her money. Afterwards, Stanley is rarely seen until the final episode.
He is known to be very cheap, yet he made extravagant romantic gestures toward Dorothy. The first time he proposed to her, it was in a very expensive restaurant where he placed a ring in the champagne glass, which she unknowingly gulped. Many years later after they had been divorced, he proposed to her a second time, it was again at a restaurant, where he placed a ring in a hot potato. During their marriage, he had given her a mink stole, which was stolen but later recovered. (Interestingly, in an earlier episode, when Rose asked Dorothy if Stan had ever given her a mink stole, Dorothy said that he had not.) On their 38th wedding anniversary, he spent $2500 for a ring, which she later pawned off to pay for their joint back taxes after they were divorced. Stan bought back the ring for her. He pays off their back taxes by selling off...(and so on) To get More information , you can visit some products about foldable plastic container , Flexible Plastic Container , plastic storage container , Plastic Jar Container , plastic corrugate container , small plastic container , , corrugated plastic container , battery plastic container , garden plastic container , .

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CETME Ameli


Ameli
The Ameli light machine gun.
Type
Light machine gun
Placeoforigin
Spain
Service history
Inservice
1982resent
Usedby
Spain, Mexico
Production history
Designer
CETME
Designed
19741981
Manufacturer
General Dynamics Santa Bbara Sistemas
Produced
1982resent
Specifications
Weight
5.3kg (11.68lb)
Length
970mm (38.2in)
Barrellength
400mm (15.7in)
Cartridge
5.56x45mm NATO
Action
Roller-delayed blowback
Rateoffire
8001,200 rounds/min
Muzzlevelocity
875m/s (2,871ft/s) (SS109 cartridge)
Effectiverange
3001,000 m sight adjustments
Maximumrange
1,650 m
Feedsystem
100 or 200-round M27 belt
Sights
Rear aperture sight and front post340mm (13.4in) sight radius
The Ameli (an abbreviation for the Spanish: Ametralladora ligera or "light machine gun") is a 5.56mm light machine gun designed for the Spanish Army (Ejcito de Tierra) by the nationally owned and operated Centro de Estudios Tnicos de Materiales Especiales (CETME) research institute (founded by the Spanish government in 1950).
Development of the weapon began in 1974 under the supervision of Mar Jimez Alfaro (who would later become the director of CETME). The new weapon was officially unveiled in 1981 and after undergoing exhaustive military trialsdopted into service in 1982 as the standard squad-level support weapon of the Spanish Army, designated the MG82. The Ameli is manufactured at the Empresa Nacional Santa Bbara factory (now General Dynamics Santa Bbara Sistemas) in A Coru?a. The Ameli never saw the widespread adoption originally envisioned for the program due to quality and reliability concerns and is currently being replaced by the Heckler & Koch MG4E light machine gun.
Contents
1 Design details
2 See also
3 References
4 Bibliography
5 External links
//
Design details
The Ameli is an automatic weapon and externally resembles the 7.92mm MG 42 machine gun of World War II and its post-war varianthe West German MG3. However, unlike the MG42's roller-locked short recoil operating principle (where the barrel and bolt recoil together a short distance before they unlock), the Ameli uses the delayed blowback method of operation with a fixed barrel and a pair of rollers which retard the rearward movement of the bolt. This mechanism was employed in CETME Model A, B, C and Model L series of rifles, and also in the Heckler & Koch G3 battle rifle, HK33 assault rifle and MP5 series of submachine guns. Similarities with the 7.62mm Model C and 5.56mm Model L rifles extend to the interchangeability of certain parts.
The heart of this system is the bolt assembly, which consists of a bolt head, locking piece and two cylindrical rollers, which upon chambering a round, are displaced outwards by angled surfaces in the forward pressing locking piece and into notches in the barrel extension. The geometry of the walls in the receiver extension and the locking piece ensure that once a shot is fired, the bolt head absorbs the recoil impulse from the ignited cartridge through the base of the empty casing and transmits this rearward pressure onto the rollers forcing them out of their sockets and inward, interacting with inclined surfaces on the locking piece, propelling it backwards at a speed that is approximately 1.5x greater than that of the bolt head, thereby increasing the bolt's inertia and providing a delay in the blowback sequence. The relatively short initial rear displacement of the bolt head immediately after firing and the resulting delay eliminates the probability of a premature case extraction from the chamber (beyond the thick-walled base of the chamber) that would result in the spent casing bursting as the breech is opened only after the bullet has left the barrel and gas pressures inside the barrel have dropped to within safe limits.
The Ameli fires from an open bolt and uses a striker firing mechanism (in which the bolt and internally-channeled firing pin perform the role of a striker). The trigger mechanism permits fully-automatic fire only but the rate of fire can be adjusted by using bolts of variable weight, like in the MG3. The lighter bolts will produce the maximum rate of fire (1,200 rounds/min) while heavier bolt results in a rate of fire of approximately 850900 rounds/min. The weapon features a cross-bolt type safety that disables the sear mechanism when pressed into the "safe" position. The machine gun is fed from an open-link disintegrating M27 ammunition belt that can be strung loosely from the feed tray or placed inside a 100 or 200-round disposable plastic container, which is then clipped to the left side of the receiver. This ammunition container has a transparent rear wall that allows the gunner to monitor ammunition levels visually. Feeding is carried out with a pawl-type feeding mechanism, which was modeled on the MG42 feed system. Spent cartridge casings are ejected downward through a chute in the receiver.
The quick-change type air-cooled barrel is equipped with a slotted flash suppressor. The barrel has a chrome-lined bore with 6 right-hand grooves and a 178 mm (1:7 in) rifling twist rate that is optimized for use with heavier SS109 5.56x45mm NATO rounds. A barrel with a 305 mm (1:12 in) twist rate designed specifically to stabilize the lightweight M193 cartridge is also available. The chamber portion of the barrel has flutes that assist in the extraction sequence; once gas pressure in the bore drops to a safe level, the recycled gases fill the flutes surrounding the cartridge casing, loosening the case from the chamber walls while residual pressure in the barrel forces it back to be ejected downward and forward. A fixed carrying handle is positioned above the rear of the barrel, which aids in barrel changes when the barrel becomes too hot; the barrel can be removed and replaced in 5 seconds.
The Ameli is fitted with a polymer stock, bipod and iron sights that consist of a forward post and rear aperture contained in the carry handle assembly with 300, 600, 800 and 1,000 m range settings. The quick-detachable bipod has a height adjustment feature and is mounted to the barrel heat shroud at the muzzle end. The light machine gun can be deployed with the bipod, in a vehicle mount or on a static tripod mount.
See also
FN Minimi
Stoner 63
References
^ http://www.armyrecognition.com/mexico_army_military_equipment/mexico_mexican_army_land_ground_forces_military_equipment_armoured_vehicle_pictures_information_desc.html
^ a b c d e f g Wo?niak, Ryszard: Encyklopedia najnowszej broni palnejom 1 A-F, page 140. Bellona, 2001.
^ a b c d e Crawford, Steve: Twenty-first Century Small Arms: The World's Great Infantry Weapons, page 76. Zenith Press, September 2003.
^ General Dynamics Santa Bbara Sistemas
^ http://www.heckler-koch.de/HKWebNews/byItemID///22//3/15
Bibliography
Crawford, Steve (2003). Twenty-first Century Small Arms: The World's Great Infantry Weapons. St. Paul, MN: Zenith Imprint. ISBN 9780760315033.
Gander, Terry J.; Ian Hogg (2005). Jane's Guns Recognition Guide, Fourth Edition. London, UK: HarperCollins Publishers. ISBN 978-0007183289.
(Polish) Wo?niak, Ryszard (2001). Encyklopedia najnowszej broni palnejom 1 A-F. Warsaw, Poland: Bellona. ISBN 83-11-09149-8.
External links
Modern Firearms
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