| 单词 | arrester |
| 例句 | Although it’s simple enough for a plumber to cut out a short section of copper pipe and sweat-solder a water hammer arrester into the space, cutting through walls causes a lot of follow-up work. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z To install the arresters directly on the washer, turn off the water, pull out the machine to access the back and make the connections there. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z If there is enough room where the supply lines connect to the faucets, just turn off the water, disconnect the supply hoses, screw on the arresters and reconnect the hoses. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z One would be to install water hammer arresters into piping close to where the noises occur. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z When pipes aren’t exposed, though, there is no way to add hammer arresters or even pipe clamps or insulation without ripping into walls. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z The arresters come in various configurations to connect to different types of pipes or appliances. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z Most dishwashers require hammer arresters with ⅜ -inch male and female compression fittings. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z Manufacturers now make inexpensive, easy-to-install water hammer arresters where these appliances connect to the water system. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z This might be marginally safer, because the shock arresters will be closer to where the vibrations begin. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z With some shock arresters, the air chamber, which is in the closed pipe on one half of the T-shape fitting, has to be pointed upward. How to stop loud knocking in the water pipes 2020-09-18T04:00:00Z Millions of Ukrainians face the prospect of a winter without heat, and the aid discussion is focusing as much on transformers, circuit breakers and surge arresters as on tanks, artillery and air-defense systems. Ukraine welcomes a U.S. push for energy aid, saying time is of the essence. 2022-11-30T05:00:00Z Now, with millions of Ukrainians facing the prospect of a winter without heat, discussion is focusing as much on transformers, circuit breakers and surge arresters as on tanks, artillery and air-defense systems. U.S. Pledges $53 Million to Help Fix Ukraine’s Electrical Grid 2022-11-29T05:00:00Z The chief minister had held a meeting last week and asked state officials to install lightning arresters at all government buildings, including schools and hospitals, The Times of India newspaper reported. Bihar: Lightning strikes kill 20 in Indian state 2022-07-27T04:00:00Z Cherrington’s latest review found recurring problems with surge arresters that protect Metro’s electrical systems. New audit faults lack of effective oversight, new problems with phase 2 of Silver Line 2020-03-05T05:00:00Z If you are in a fire zone, Lopez recommends installing a spark arrester. How to help fireproof your home before the next big wildfire 2019-05-02T04:00:00Z Riders must be equipped with spark arresters, Smith said. Mandatory evacuations ordered in 700-acre fire in Cleveland National Forest 2017-10-27T04:00:00Z Maintenance being done through Saturday on the so-called Big Tree in Rockport includes repair and replacement of parts of the lightning arrester system. Volunteers help with maintenance of Big Tree in Rockport 2016-02-13T05:00:00Z A lightning arrester system was installed so if it was struck, the charge would be grounded, preventing severe damage to the tree. Old oak in Bloomington’s Seminary Park to come down 2015-09-04T04:00:00Z Subsequent investigation by the project’s lead electrical contractor found that the arresters were not appropriately rated for Metro’s system and should not be used. New audit faults lack of effective oversight, new problems with phase 2 of Silver Line 2020-03-05T05:00:00Z Most states require A.T.V.’s to be equipped with what are known as “spark arresters,” but enforcement is minimal, and clearly, fires are still being ignited. Op-Ed Contributor: The Wildfires Still Burn 2012-10-19T03:31:06Z Carrier-style arrester wires would cause too much damage and would hardly be comfortable for passengers. Launching aircraft: Proof by induction 2012-10-18T15:26:19Z The lawyers argue that the company should have installed “flame arrester” shields at the mouth of the containers to prevent explosions. In a Shuttered Gasoline Can Factory, the Two Sides of Product Liability 2012-10-04T16:18:42Z The simple principles of switchboard construction, the development of the switchboard, the connections of the various instruments, including the lightning arrester, are also plainly set forth. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z Then it will be farewell to the aerial with its poles and lead-ins, arresters and ground switches. The Radio Boys' Search for the Inca's Treasure 2011-04-30T02:00:12.743Z Proved easy pickings for that active little arrester of last night, Pudge O’Shay. Lonesome Town 2011-04-12T02:00:24.580Z The devices marked A in this and the following figures are air-gap arresters. Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc. But last year, a Texas court forced the company to pay Mr. Green’s mother $250,000 for failing to provide all the documents it had on flame arresters before the trial. In a Shuttered Gasoline Can Factory, the Two Sides of Product Liability 2012-10-04T16:18:42Z These are met with in barometers, spray arresters, and filter pumps, in condensers and some forms of vacuum tube. A Handbook of Laboratory Glass-Blowing Mr. Gibson understood the importance of lightning arresters, but was not prepared to apply them in his home. Cupid's Middleman If you use a loop antenna, of course, no arrester is needed. Letters of a Radio-Engineer to His Son Stumbling through the débris that covered the floor, Bucks made his way to the operator’s table and put his hand up to cut in the lightning arrester. The Mountain Divide He said that the list was not a definitive plan and that the company was never against adding arresters. In a Shuttered Gasoline Can Factory, the Two Sides of Product Liability 2012-10-04T16:18:42Z "The greatest difficulty, methinks, will be to escape from the arrester; and you seem to think nothing of the danger I run in trusting myself within the grasp of such a man." The Buccaneer A Tale But talking of radio reminds me that we ought to get busy with that lightning arrester we were talking about.” The Radio Boys at the Sending Station Making Good in the Wireless Room To protect the house and your apparatus from lightning insert a fuse and a little carbon block lightning arrester such as are used by the telephone company in their installations of house phones. Letters of a Radio-Engineer to His Son The fault was found in a lightning arrester which one of the operators had neglected in the cable hut. A Woman's Journey through the Philippines On a Cable Ship that Linked Together the Strange Lands Seen En Route “We are always in favor of any approach, including the use of flame arresters, that can provide additional safety protections for children and adults,” said Scott Wolfson, a spokesman for the commission. In a Shuttered Gasoline Can Factory, the Two Sides of Product Liability 2012-10-04T16:18:42Z Where the use of oil cannot be considered, spark arresters are essential. Practical Forestry in the Pacific Northwest Protecting Existing Forests and Growing New Ones, from the Standpoint of the Public and That of the Lumberman, with an Outline of Technical Methods “Now as to this lightning arrester,” resumed Bob, leaving Jimmy to regain his equanimity. The Radio Boys at the Sending Station Making Good in the Wireless Room You can also use a so-called “vacuum lightning arrester.” Letters of a Radio-Engineer to His Son Chimneys connected with open fireplaces ought to be equipped with spark arresters. If You're Going to Live in the Country Philip Monckton, a Scepter vice president, said the company did not use flame arresters on the cans it makes in Canada. In a Shuttered Gasoline Can Factory, the Two Sides of Product Liability 2012-10-04T16:18:42Z The slight disadvantage involved by the modern improved arrester is not to be compared with the importance of the safety acquired. Practical Forestry in the Pacific Northwest Protecting Existing Forests and Growing New Ones, from the Standpoint of the Public and That of the Lumberman, with an Outline of Technical Methods “Why, you thick heads,” replied Jimmy, with more force than politeness, “don’t you know that you don’t have to have a lightning arrester with a loop aerial?” The Radio Boys at the Sending Station Making Good in the Wireless Room The Roberts carbon arrester is designed with particular reference to the disposal of carbon dust and is termed self-cleaning for that reason. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Incidentally, radio antennae should be properly grounded and have an approved lightning arrester. If You're Going to Live in the Country "Likely Foster would have sent his order out and had those arresters shipped around Cape Horn from New York," he added. The Rim of the Desert The spark arrester's a good thing all right, so you put it in. The Rules of the Game Of course on an indoor aerial there’s no need of a lightning arrester. The Radio Boys at the Sending Station Making Good in the Wireless Room This same principle is utilized in some forms of arresters, such as the one shown in Fig. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. You're a good man, whoever you are, for keeping an eye on the house," she said to the puzzled-looking arrester, "but the joke is on you this time. The Camp Fire Girls at School Or, The Wohelo Weavers First came a heavy tax for operating the road; and next was an order to put spark arresters on all his engines. The Rim of the Desert But one article in the entire list did I find to be sectional, and that was for a spark arrester. Rough and Tumble Engineering I. Consider then, first, the representation of the Servant of the Lord as the arrester of incipient ruin. Expositions of Holy Scripture Isaiah and Jeremiah Metallic Electrodes:—Copper or other metal blocks with roughened surfaces separated by an insulating slip may be substituted for the carbon blocks of most of the arresters previously described. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Later investigations have proved that it exercises a yet more important influence as an arrester of metamorphosis. The Atlantic Monthly, Volume 03, No. 15, January, 1859 Don't fail to use a lightning arrester, or better, a lightning switch, for your receiving set. The Radio Amateur's Hand Book This being recognized by some genius in one of our wooded states who has profited by it and has produced a "smoke stack" which is also a "spark arrester." Rough and Tumble Engineering For surely those official arresters of men must want arresting at times as well as better people. Note Book of an English Opium-Eater Such devices consist of two conductors separated by an air space or other insulator and are variously known as lightning arresters, spark gaps, open-space cutouts, or air-gap arresters. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. It is not expected that this arrester will blow because 6 or 7 amperes of abnormal currents are flowing through it and the apparatus to be protected. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Connect a length of wire to the top post of the arrester or just above it to the wire, run this through the leading-in insulator and connect it to the slider of your tuning coil. The Radio Amateur's Hand Book What is the purpose of the globule of low-melting alloy in the Western Electric Company's arrester? Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The Kellogg Company regularly equips its magneto telephones with air-gap arresters of the type shown in Fig. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Such an arrester brings a ground connection close to plates connected with the line and is adapted to protect apparatus either connected across a metallic circuit or in series with a single wire circuit. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. When sneak-current arresters are so used the arrangement of the parts then is the same as in the central-office portion of Fig. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The air-gap arrester acts in response to high voltages, either of lightning or of high-tension power circuits. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. All currents above this critical amount will operate the arrester; the larger the current, the shorter the time of operating. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. A sneak-current arrester is not required at the subscriber's station with such equipment. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Carbon arresters now are widely used in the general form shown in Fig. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Provision Against Continuous Arc:—For the purpose of short-circuiting an arc, a globule of low-melting alloy may be placed in one carbon block of an arrester. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. At the subscriber's premises each wire contains other fuses and these are associated with carbon arresters. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. If the carbon arresters are separated by celluloid, it will burn away and allow the carbons to come together, extinguishing the arc. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Usually it discharges across arresters and when this discharge takes place, the line is disturbed in its balance and loud noises are heard in the telephones upon it. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. A form of Western Electric arrester particularly adapted for outside use on railway lines is shown with its cover in Fig. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. This ground may be of very high resistance, but is probably one of many such—one at each arrester connected to the line. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. In special forms of carbon arresters an attempt has been made to limit Page 297 this danger of grounding by the deposit of carbon dust. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Vacuum Arresters:—All of the carbon arresters so far mentioned depend on the discharge taking place through air. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. If the coil shown therein be considered an arrangement of conductors having inductance, it will be seen that a favorable place Page 300 for an air-gap arrester is between that impedance and the line. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Sneak-current arresters, therefore, should be a part of subscribers' station protectors in magneto equipment, except in such rural districts as may have no lighting or power wires. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. High-tension currents jump to ground through the air-gap arrester, while sneak currents permit the pin of the heat coil to slide within the sleeve, thus grounding the outside line and the line to the switchboard. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The Kellogg Company has long employed for its sneak-current arrester a short graphite rod, which forms the resistance element. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. A group of such arresters, as manufactured by the Dean Electric Company, is shown in Fig. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Current will tend to flow by the carbon arrester without operating it, but such a current must pass through the winding of the heat coil if it is to enter the apparatus. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The insulator of an open-space arrester often is called the dielectric. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Again the current will become large and will blow the fuse which lies between the sneak-current arrester and the point of contact with the source of foreign current. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. This feature is not essential in an arrester intended solely to divert lightning discharges. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. A form of combined heat coil and air-gap arrester, widely used by Bell companies for central-office protection, is shown in Fig. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The occasions of visit to the arresters, therefore, usually follow actual heavy discharges through them. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Inserting a plug in the hole between the two line plates connects the line wires directly together at the arrester. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The American Company specifies copper-block arresters where long country lines enter cables, if those lines are exposed to lightning discharges only. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The present standard sneak-current arrester embodies the two elements of the devices of Fig. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. It may slide or turn in many ways and this happily enables many types of arresters to result. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. When a heat coil is associated with the proper switching springs, it becomes a sneak-current arrester. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. It will be noted that this explanation applies to equipment at either end of the line, as the fuse lies between the point of contact and the carbon arrester. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. In some arresters, the line wire is cut off from the wire leading toward the apparatus by the same movement which grounds it. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The passage of current to ground at the arrester, however, will be over a path containing nothing but wire and the arrester. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Other things being equal, that system of protection is best in which all lightning discharges are arrested by gap arresters and in which no fuses ever are operated by lightning discharges. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. It is hoped that the student grasps clearly the distinction between the purposes of air-gap and fuse arresters. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Assume, on the other hand, that the contact is made at the point Y. The central-office carbon arrester will operate, grounding the line and increasing the amount of current flowing. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. For these reasons, a system containing fuses and air-gap arresters only, does not protect against abnormal currents which are continuous and small, though large enough to injure apparatus because continuous. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Other specifications of that company have called for the use of copper-block arresters on lines exposed to hazards above 2,500 volts. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. In certain regions of the Pacific Coast where the lightning hazard is negligible and the high tension hazard is great, metal-block arresters at the outer ends of cables give acceptable protection. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Explain the reason for placing an impedance in connection with the lightning arrester. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Proper Functions:—A fuse is not a good lightning arrester. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Make a diagram of a sneak-current arrester and describe its principles and working. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. It includes the local wiring within the premises of the subscriber and also the lightning arrester and other protective devices, if such exist. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. |
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