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Pencil sharpener

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Gould & Cook Co.), the Planetary Pencil Sharpener (A. B. Dick Co.), all from the US or the Jupiter (Guhl & Harbeck Co.) from Germany. At the beginning of the 20th century the company Automatic Pencil Sharpener Co. (APSCO) was founded and brought out the US Automatic Pencil Sharpener after 1907, which dominated in those years. They later sold machines with milling mechanisms, such as the Climax, Dexter, Wizard, and Junior models. In the next few decades, APSCO became the largest pencil sharpening machine producer in the world and together with a few other US companies, it dominated the market.
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nations, imported sharpeners may have non-standard-sized alignment guide-holes, making sharpening attempts difficult. If the alignment hole is too small, the pencil cannot be inserted, while if it is too large, the tip of the pencil will repeatedly break off. Prism sharpeners may be right- or left-handed, requiring clockwise or counter-clockwise rotation of the pencil being sharpened.
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lurching cut-depths and point breakage. Another important feature is a larger clearance hole at the end of the cone allowing sections of the pencil lead which break away to be removed with only minor inconvenience. Prism sharpeners can be bare or enclosed in a container to collect the shavings, while some enclosed sharpeners may be harder to clear in the event of a blockage.
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An artist's or draftsman's pencil sharpener leaves the graphite untouched and sharpens only the wood (some models can switch from standard to wood-only by an adjustment). The graphite lead is then honed to a sharp point with a lead pointer, which sharpens only the lead without wood. Lead pointers are
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Specialized sharpeners are available that operate on non-standard sizes of pencil-shaped markers, such as wax crayons used in primary schools. Sharpeners that have two openings, one for normal pencils and one for larger crayons, are fairly common. Sharpeners with a single blade for use on wax crayons
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or block, only about 1 × 5/8 × 7/16 inch (2.5 × 1.7 × 1.1 cm) in size. The block-shaped sharpener consists of a combined point-shaping cone that is aligned to the cylindrical pencil alignment guide hole, into which the pencil is inserted. A sharp blade is mounted so that its sharp edge just
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and apparently needed a device to precisely sharpen the pencils. The device of Mr. Boucher was technically sensible and functional. His idea was also internationally known and recognized, as shown by corresponding reports in German literature at this time. But Mr. Boucher had not applied a patent for
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with thin diameter leads dispense the graphite lead progressively during use and thus do not require sharpening; such pencils are sometimes called "self-sharpening". A type of mechanical pencil has a rotating gear mechanism which rotates the lead slightly every time the lead is lifted off the paper,
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or sandpaper. Rotating pencil sharpeners are now available for these pencils, in which a rotating plastic collar holds the pencil in position, although they then sharpen to the usual conical point as for a round pencil, abandoning some distinctive aspects of the carpenter's pencil. Alternatively, a
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Most planetary sharpeners have a large opening, with a rotatable guide disk in front of it that has multiple holes of different sizes, to accommodate pencils of many different diameters. Advanced models have a spring-driven holder for the pencil, so that the pencil automatically is pushed into the
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The blade inside the sharpener shaves the wood and graphite tip of the pencil, while the shavings emerge through a slot along the blade edge. It is important that the cylindrical alignment hole closely fits the diameter of the pencil, to keep the pencil from wobbling, which would cause stepped or
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At the end of the 19th century, especially in the United States, pencil sharpeners with various mechanisms had been developed and put on the market. These devices were often heavy and intended for use in offices. Examples are the Perfect Pencil Pointer (Goodell. Co.), the GEM Pencil Sharpener (by
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A few prism sharpeners are hand-cranked, rotating the cutting blade instead of rotating the pencil. Moderate care is needed to not break the tip of the pencil being sharpened, requiring the pencil to be sharpened again. However, because pencils may have different standard diameters in different
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cylindrical cutters in the mechanism, set at an acute angle to each other. The multiple cutting edges quickly sharpen the pencil, with a more precise finish than a single-blade device. Some cylindrical sharpeners have only one helical cutter cylinder, but most have two cylinders or more.
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put on display, in its regional welcome center, hundreds of pencil sharpeners which had been collected by Rev. Paul Johnson, an Ohio minister who died in 2010. Johnson, a World War II veteran, had kept his collection of more than 3,400 sharpeners in a small shed, outside his home in
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So-called "prism" sharpeners, also called "manual" or "pocket" sharpeners in the United States, have no separate moving parts and are typically the smallest and cheapest commonly used pencil sharpener on the market. The simplest common variety is a small rectangular
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In the 1830s and 1840s, some French people, all based in Paris, were engaged in construction of simple pencil sharpening tools, like François Joseph Lahausse. These devices were partially sold, but without supra-regional significance. In 1847, the French nobleman
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Auto-stop electric pencil sharpeners are able to sense when the tip of the pencil is long enough, so they stop automatically. In basic automatic pencil sharpeners, the lead may become too long and break, and so users must be careful to supervise the operation.
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The oldest surviving electric pencil sharpener is the Boston Polar Club pencil sharpener, introduced around 1936. Electric pencil sharpeners work on the same principle as manual ones, but one or more flat-bladed or cylindrical cutters are rotated by an
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Unlike prism sharpeners, linear blade sharpeners do not rotate relative to the pencil being sharpened, and may be viewed as just a special form of knife, with a mechanical guide for increased safety and convenience. Some models use replaceable shaving
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in 1855. He founded a company – the first pencil sharpener company in the world – and produced such small hand-held pencil sharpeners in a large amount. Only a few years later the sharpeners were sold also in Europe as "American pencil sharpeners".
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Electric pencil sharpeners for offices have been made since at least 1917. A school teacher, Neil Carruthers, brought electric sharpeners from his visit to USA back to his town of Whitehaven for use in schools at the end of the Victorian Era.
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Some older models like the 1897 German Jupiter 1 used reversible rotary cutter-disks with cutting edges radiating from the center on each side. These were high-end models, quite large and expensive. Others simply used abrasives like
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The development of pencil sharpeners began in France when a French book from 1822 reported in detail about an invention of Mr. C. A. Boucher (Paris) for the construction of a pencil sharpener. He was working with
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in southeast Ohio. He had started collecting after his wife gave him a few pencil sharpeners as a gift in the late 1980s and kept them organized into categories, including cats, Christmas, and
532:, the flattened shape of which stops them from rolling away, while still providing a constant line width. These pencils were traditionally sharpened with tools conveniently to hand, such as a 344:
While most linear blade sharpeners are simple and directly hand-operated, some devices in the past were crank-operated, using mechanisms to convert crank rotation into linear motion.
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special carpenter's pencil sharpener can be used, which has a sliding mechanism that leaves flat facets on the lead, in a manner similar to hand sharpening with a sharp knife.
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mechanism while being sharpened. Some versions also offer a regulator of the desired sharpness, since it is not always desired to make the graphite core needle-sharp.
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helping to maintain a consistent, sharp point. If a finer or broader line is needed, a separate mechanical pencil using a lead with a different diameter is required.
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Description des machines et procédés spécifiés dans les brevets d'invention, publ. par C.P. Molard. [With] Table générale des vingt premiers volumes...
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invented a simple hand-held pencil sharpener in its recognizable modern form. The first American pencil sharpener was patented by Walter Kittredge Foster of
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AC-powered electric pencil sharpener. The mechanism is similar to the planetary sharpener, except there is a motor instead of a crank.
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are available, and sometimes included in boxes of crayons. These often have plastic blades, which are adequate for the soft wax.
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Recueil de la Société polytechnique: ou Recueil industriel, manufacturier, agricole et commercial, de la salubrité publique, ...
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Hand-cranked planetary sharpener with spring-driven pencil holder. The small knob behind the crank is a sharpness regulator.
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Repertory of patent inventions and other discoveries and improvements in arts, manufactures and agriculture
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Description des machines et procédés pour lesquels des brevets d'invention ont été pris sous le régime ...
2151: 394:. In some cases an abrasive was used to shape the graphite core, while the wood was cut some other way. 1825: 431: 182:'s writing point by shaving away its worn surface. Pencil sharpeners may be operated manually or by an 754: 2126: 2094: 1648: 2010: 1685: 1257: 1232: 466: 1785: 360:. A larger, stationary planetary sharpener can be mounted on a desk or wall and powered by a hand 2059: 2049: 2044: 1613: 1603: 1598: 664: 470: 35: 2084: 2074: 1638: 1628: 1011: 986: 777: 82: 2064: 1618: 1102: 1039: 416: 2104: 2099: 1658: 1653: 826: 419:
rather than being plugged into a building's electrical system, making them more portable.
8: 2136: 2069: 1770: 1678: 1623: 1242: 919: 167: 877:(in French). Société d'encouragement pour l'industrie nationale. 1834. pp. 406–407. 1930: 1830: 1735: 381: 747:"History of pencil sharpeners and pointers −1850 Lassimone, Cooper/Eckstein, Lahausse" 2025: 894: 843:"RARE ANTIQUE EARLY PATENT PENCIL SHARPENER 1830s – COOPER & ECKSTEIN STYLOXYNON" 706: 679: 659: 540: 361: 248: 144:
Video of a mechanical pencil sharpener, showing gearing and helical sharpening blades
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Before the development of dedicated pencil sharpeners, a pencil was sharpened by
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Tool for sharpening a pencil's writing point by shaving away its worn surface
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A wall-mounted planetary sharpener (casing removed to reveal the mechanism)
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Hand-cranked planetary sharpener from 1950 to 1960, with cover removed
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his pencil sharpener. Commercial use of his inventions is unlikely.
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Bulletin de la Société d'encouragement pour l'industrie nationale
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The Mechanics' Magazine, Museum, Register, Journal & Gazette
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An unusual hand-cranked prism sharpener, with a shavings cover
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A manual prism sharpener generates long fan-shaped shavings
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Prism sharpener with two holes for two sizes of pencils
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A well-used modern desk-style electric pencil sharpener
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André Grahl: History of pencil sharpeners and pointers
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Lead sharpener/lead pointer and 2 mm pencil lead in a
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Neueste Nachrichten aus dem Gebiete der Politik: 1858
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Hand-cranked planetary sharpener, with cover in place
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Knight and Lacey. 1837. p. 185. 775: 699:Gerry Coughlan; Martin Hughes (2007). 397: 154:video showing a manual prism sharpener 1674: 1169: 981: 979: 815:. Macintosh. 1833. pp. 318–319. 735: 482:adding citations to reliable sources 449: 258: 47:adding citations to reliable sources 18: 263: 13: 1107:Boston Polar Club Pencil Sharpener 976: 385:Jupiter 1 with rotary disk cutters 348:Cylindrical (planetary) sharpeners 242:In May 2011, tourism officials in 14: 2163: 1123: 799:(in French). pp. 583, 81–83. 744: 352:These mechanisms are also called 1141: 1129: 793:Du Commerce, France min (1835). 672: 641: 629: 614: 602: 590: 578: 566: 554: 454: 376: 23: 1095: 1053: 1004: 960: 907: 881: 782:(in German). Voss. p. 247. 356:, in reference to their use of 329:A linear sharpener that uses a 34:needs additional citations for 1700: 865: 835: 819: 803: 786: 769: 719: 1: 1146:The dictionary definition of 705:. Lonely Planet. p. 74. 686: 427:Specialized pencil sharpeners 178:) is a tool for sharpening a 1040:"Electric Pencil Sharpeners" 942:"Handheld Pencil Sharpeners" 7: 653: 10: 2168: 776:Hülsse, Julius A. (1841). 702:Irish Language and Culture 609:Battery-operated sharpener 547: 521:also used with mechanical 189: 2039: 1731: 1708: 1593: 1208: 2080:Machine and metalworking 2011:Tongue-and-groove pliers 1634:Machine and metalworking 285:enters the shaping cone 2090:Measuring and alignment 1644:Measuring and alignment 665:Pencil Sharpener Museum 321:Linear blade sharpeners 1373:Oxy-fuel cutting torch 447: 439: 407: 386: 333: 309: 276: 155: 145: 128: 2142:Mechanical hand tools 445: 434: 405: 384: 328: 307: 271: 214:French mathematician 153: 143: 126: 2055:Cutting and abrasive 1609:Cutting and abrasive 1138:at Wikimedia Commons 478:improve this section 354:planetary sharpeners 224:Thierry des Estivaux 43:improve this article 2147:Domestic implements 1243:Ceramic tile cutter 1082:"Pencil Sharpeners" 757:on 13 November 2019 528:Carpenters may use 398:Electric sharpeners 2152:1828 introductions 1736:Adjustable spanner 1103:"The Antikey Chop" 541:Mechanical pencils 448: 440: 408: 387: 334: 310: 277: 216:Bernard Lassimonne 156: 146: 129: 58:"Pencil sharpener" 2114: 2113: 2026:Upholstery hammer 1668: 1667: 1136:Pencil sharpeners 1134:Media related to 920:Discover magazine 712:978-1-74059-577-3 680:Technology portal 660:Mechanical pencil 530:carpenter pencils 514: 513: 506: 259:Manual sharpeners 151: 141: 119: 118: 111: 93: 2159: 2127:Office equipment 1901:Pencil sharpener 1695: 1688: 1681: 1672: 1671: 1575:Water jet cutter 1540:Sharpening stone 1378:Pencil sharpener 1190: 1183: 1176: 1167: 1166: 1149:pencil sharpener 1145: 1133: 1118: 1117: 1115: 1113: 1099: 1093: 1092: 1090: 1088: 1078: 1069: 1068: 1065:ABC7 Los Angeles 1057: 1051: 1050: 1048: 1046: 1036: 1027: 1026: 1024: 1022: 1016:officemuseum.com 1008: 1002: 1001: 999: 997: 991:officemuseum.com 983: 974: 973: 964: 958: 957: 955: 953: 944:. 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902: 900:9781010644743 896: 892: 891: 884: 876: 875: 868: 852: 848: 844: 838: 830: 829: 822: 814: 813: 806: 798: 797: 789: 781: 780: 772: 756: 752: 748: 741: 739: 730: 729: 722: 714: 708: 704: 703: 695: 691: 681: 675: 670: 666: 663: 661: 658: 657: 644: 639: 632: 627: 623: 617: 612: 605: 600: 593: 588: 581: 576: 569: 564: 557: 552: 551: 545: 542: 538: 535: 531: 526: 524: 518: 508: 505: 497: 494:November 2023 487: 483: 479: 473: 472: 468: 463:This section 461: 457: 452: 451: 444: 438: 433: 424: 420: 418: 414: 404: 395: 393: 383: 377:Other systems 374: 370: 367: 363: 359: 355: 345: 342: 340: 332: 327: 318: 314: 306: 302: 300: 296: 292: 288: 283: 274: 270: 256: 254: 250: 245: 240: 236: 232: 229: 228:Bangor, Maine 225: 219: 217: 212: 209: 203: 201: 197: 187: 185: 181: 177: 173: 169: 165: 161: 125: 121: 113: 110: 102: 99:November 2023 91: 88: 84: 81: 77: 74: 70: 67: 63: 60: –  59: 55: 54:Find sources: 48: 44: 38: 37: 32:This article 30: 26: 21: 20: 1996:Strap wrench 1971:Slide hammer 1966:Sledgehammer 1900: 1891:Paint roller 1776:Caulking gun 1746:Basin wrench 1463:Concrete saw 1458:Circular saw 1443:Abrasive saw 1403:Pocket knife 1388:Pizza cutter 1377: 1363:Nail clipper 1323:Honing steel 1308:Glass cutter 1273:Diamond tool 1258:Cutting tool 1148: 1110:. Retrieved 1106: 1097: 1085:. Retrieved 1064: 1055: 1043:. Retrieved 1019:. Retrieved 1015: 1006: 994:. Retrieved 990: 968: 962: 950:. Retrieved 946:the original 936: 925:, retrieved 918: 909: 889: 883: 873: 867: 855:. Retrieved 851:the original 846: 837: 827: 821: 811: 805: 795: 788: 778: 771: 759:. Retrieved 755:the original 750: 727: 721: 701: 694: 622:Ecologically 539: 527: 519: 515: 500: 491: 476:Please help 464: 421: 409: 388: 371: 353: 351: 343: 339:razor blades 335: 315: 311: 287:tangentially 278: 241: 237: 233: 220: 213: 204: 193: 175: 171: 163: 159: 157: 120: 105: 96: 86: 79: 72: 65: 53: 41:Please help 36:verification 33: 2105:Woodworking 1961:Screwdriver 1956:Scratch awl 1916:Pipe wrench 1766:Breaker bar 1751:Block plane 1659:Woodworking 1560:Switchblade 1423:Razor strop 1408:Putty knife 1348:Meat slicer 1293:Emery cloth 1278:Disc cutter 1253:Countersink 1228:Bolt cutter 523:leadholders 331:razor blade 249:Carbon Hill 244:Logan, Ohio 208:pantographs 2137:Sharpening 2121:Categories 1986:Staple gun 1981:Spike maul 1896:Paintbrush 1886:Nut driver 1881:Multi-tool 1861:Lug wrench 1841:Hole punch 1811:Grease gun 1702:Hand tools 1580:Wire brush 1550:Steel wool 1468:Coping saw 1383:Pipecutter 1338:Lawn mower 923:, May 2007 847:Worthpoint 687:References 437:leadholder 253:Disneyland 69:newspapers 2006:Tire iron 1871:Mitre box 1796:Fish tape 1771:Cat's paw 1723:Workbench 1493:Miter saw 1433:Sandpaper 1353:Mezzaluna 1288:Drill bit 1283:Drawknife 1238:Burnisher 1112:28 August 465:does not 417:batteries 392:sandpaper 196:whittling 2060:Forestry 2050:Cleaning 2021:Tweezers 1831:Headlamp 1713:Sawhorse 1614:Forestry 1604:Cleaning 1565:Tool bit 1514:Scraper 1510:Scissors 1498:Wire saw 1488:Hole saw 1483:Hand saw 1453:Chainsaw 1201:abrasive 927:30 April 654:See also 297:or hard 166:, or in 2132:Pencils 2085:Masonry 2075:Kitchen 1936:Plunger 1911:Pincers 1836:Hex key 1791:Crowbar 1786:Crimper 1761:Bradawl 1718:Toolbox 1639:Masonry 1629:Kitchen 1555:Surform 1505:Scalpel 1478:Hacksaw 1473:Fretsaw 1448:Bandsaw 1368:Nibbler 1343:Machete 1197:Cutting 1021:3 March 996:3 March 857:1 March 761:1 March 548:Gallery 486:removed 471:sources 366:helical 299:plastic 198:with a 190:History 168:Ireland 83:scholar 2095:Mining 2065:Garden 2031:Wrench 1921:Pliers 1866:Mallet 1816:Hammer 1801:Gimlet 1649:Mining 1619:Garden 1428:Reamer 1313:Grater 1248:Chisel 1233:Broach 1087:9 July 1045:9 July 952:9 July 897:  709:  180:pencil 176:topper 85:  78:  71:  64:  56:  2100:Power 1946:Punch 1781:Clamp 1756:Brace 1654:Power 1545:Snips 1528:Paint 1418:Razor 1398:Plane 1333:Laser 1328:Knife 1223:Blade 1203:tools 534:plane 362:crank 282:prism 200:knife 172:parer 90:JSTOR 76:books 2070:Hand 1851:Jack 1826:Hawk 1624:Hand 1523:Hand 1518:Card 1413:Rasp 1303:Froe 1298:File 1213:Adze 1199:and 1114:2019 1089:2011 1047:2011 1023:2019 998:2019 954:2011 929:2009 895:ISBN 859:2019 763:2019 707:ISBN 469:any 467:cite 162:(or 62:news 1438:Saw 1218:Axe 480:by 174:or 45:by 2123:: 1105:. 1073:^ 1063:. 1031:^ 1014:. 989:. 978:^ 917:, 845:. 749:. 737:^ 301:. 293:, 255:. 202:. 170:a 158:A 1694:e 1687:t 1680:v 1189:e 1182:t 1175:v 1116:. 1091:. 1067:. 1049:. 1025:. 1000:. 956:. 903:. 861:. 765:. 715:. 507:) 501:( 496:) 492:( 488:. 474:. 112:) 106:( 101:) 97:( 87:· 80:· 73:· 66:· 39:.

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Ireland
pencil
electric motor
whittling
knife
pantographs
Bernard Lassimonne
Thierry des Estivaux
Bangor, Maine
Logan, Ohio
Carbon Hill
Disneyland

Magnesium alloy
prism
tangentially
aluminum alloy
magnesium alloy

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