704:
268:
795:
377:
783:
471:
527:
422:
578:
852:
300:
447:
393:
747:
680:
326:
284:
723:
352:
868:
243:
254:. Springs can be located on the mechanical equivalent of the forearm or the upper arm, or both, as well as nearer to the base. Some lamps use tension springs, and others use compression springs. The adjacent image shows (left to right) a compression spring at rest, then under load, followed by a tension spring at rest, and then under load. Springs have a limited lifting capacity and extension length. Some springs can resonate, producing low-level unwanted noise.
888:
614:
550:
771:
515:
919:
71:
31:
832:
959:
at the Manca contemporary music festival in Nice in 1988. He released five albums with a four spring balanced arm lamp musical instrument (and more with other musical instruments). They are available for free download. Referenced in the book "Les chercheurs de sons" (2004), as the unique creator of a
367:
and two extension springs. One spring controls the shortest arm of a parallelogram. Parallel to this shortest arm there is the forearm. To keep these arms parallel there are two other parallel arms (upper arm) that are controlled by a second extension spring. The lamp cap rotates the same direction
433:
on the blue arm. (If the blue arm is tilted back the second spring on this arm gets push force.) The blue arm controls the two parallel arms (red) that make up the upper arm. The other spring puts pull force on the other blue arm. This arm controls the forearm (magenta). The two springs can be the
820:
and on the other side a lamp cap. These parts are lifted by a second bigger balancing arm (the upper arm) that has on the other side of a second axis a heavier counterweight. The lamp designed by
Edouard-Wilfrid Buquet in 1927 works in this way. The lamp is in the collection of the
461:
connects this arm parallel to the forearm (yellow). The longer spring controls the (blue) arm. The body (red) can turn in the horizontal plane. The body is connected to a stable foot. The body can be smaller because the pressure springs can protrude below the body.
337:
having two bars. A stronger spring set controls the upper arm, which has three parallel bars (see photo, left). (There is a less stable construction with two parallel bars in the upper arm which is less expensive to manufacture.) Due to the parallel
954:
is the only composer who from 1980 to 2007 performed the balanced-arm lamp as a musical instrument: the archisonic lamp. In 1980 he wrote the score "Ludus
Musicae Temporarium" for a balanced arm lamp orchestra. The world premiere was performed by
342:
of the lamp, the lamp cap keeps pointing in the same vertical direction when adjusting the height of the lamp. As with most balanced-arm lamps, the whole assembly can rotate in the horizontal plane, and is mounted on a stable foot.
307:
With this technique the tension spring has a double function: it controls both the forearm and the upper arm. This is not a common arm lamp system. The lamp cap rotates the same direction as the upper arm and forearm.
46:, is a lamp with an adjustable folding arm which is constructed such that the force due to gravity is always counteracted by springs, regardless of the position of the arms of the lamp. Many lamp brands (such as the
625:
and the forearm parallel. The lamp-cap and counterweight move in opposite directions (both away from the base or both towards it). The balance that is required is shown by the following formula:
498:
In this construction (commonly found in
Italian lamps) gravity causes the parallelogram to deform such that the gap between the long arms becomes smaller. This in turn increases pressure on the
695:. One short bar also extends past the parallelogram construction and holds the lamp cap. The base has an arc formed stand so the counterweight does not hit the stand in vertical position.
1375:
1206:
376:
1803:
275:
This lamp has a stiff flexible tube as its forearm, and a spring-balanced arm to support it near the middle. That way there is a flexible lamp with a long reach.
470:
753:
With this lamp the movement is very limited (the arm moves up and down only) but the technique is nice to look at. As the forearm becomes more horizontal the
291:
The wheel to control the forearm is smaller than the wheel that controls the upper arm. The lamp cap rotates the same direction as the upper arm and forearm.
703:
421:
267:
299:
679:
408:
in either arm. In this modern lamp the tension springs are hidden in the arms. The lamp cap rotates the same direction as the upper arm and forearm.
392:
1199:
446:
577:
325:
283:
851:
1913:
1668:
1192:
996:
971:
859:
This kind of lamp has a forearm balanced by weight or springs. Its disadvantage is that the upper arm cannot point up or forwards.
691:
construction formed by bars which are all hinged on each other. One long bar extends past the parallelogram construction and has a
714:
as the center of gravity is low. The counterbalance does not swing, but slides and rotates safely around the center of the stand.
1353:
2211:
2108:
1846:
1713:
867:
1938:
1723:
384:
The forearm of this lamp consist of a single bar. When it is adjusted, the angle of the lamp cap changes along with the arm.
1933:
1733:
1640:
956:
794:
351:
2103:
1264:
147:
The lamp can be moved into almost any position, and the balancing device will maintain the position until moved again.
1995:
1763:
903:
782:
710:
This lamp is similar to the one above, but as the counterweight has a low position the lamp needs no heavy foot for
613:
549:
2115:
2083:
1676:
1663:
1259:
2176:
1391:
1365:
526:
2234:
2036:
1708:
1320:
605:
Disadvantages are that the lamp is inherently less balanced, thus it needs a heavy stand to remain stable.
1793:
1718:
948:. It also serves as the letter I in the Pixar logo presented before and at the end of each of their films.
831:
757:
ceases to be balanced on both side of the base. The weight of the base is needed to avoid over-balancing.
729:
This lamp stand has a complex construction with matching narrow openings. This lamp is out of production.
711:
2206:
951:
746:
1918:
1421:
991:
822:
339:
177:
2046:
1972:
1967:
1950:
1945:
1905:
1370:
1348:
828:
Lamp-cap x fore-Arm = Arm x Small weight (Lamp-cap + Small weight) x upper-arm = Arm x Big weight.
722:
173:
242:
2196:
1868:
1653:
1596:
1588:
926:
907:
876:
887:
1686:
1658:
1578:
1416:
1404:
1360:
1288:
1234:
981:
401:
2021:
1955:
1885:
1836:
1387:
1276:
1271:
1175:
1001:
479:
879:
together the upper arm and the forearm. It is called a gravity-locked or cam-locked elbow.
2181:
2140:
2098:
2093:
1928:
1748:
1525:
1254:
1229:
1025:
514:
360:
318:
251:
47:
1127:
602:
Advantages of one swinging counterbalance is that the lamp can have a longer arm length.
2069:
1960:
1851:
1815:
1788:
1758:
1625:
1397:
1244:
1239:
1111:
1105:
1099:
1093:
1087:
1081:
1075:
1069:
1057:
1051:
1045:
1039:
1006:
976:
938:
Two spring-balanced desk lamps of this type feature as the main characters in the 1986
770:
2228:
2150:
1880:
1783:
1778:
1700:
1601:
1508:
1486:
1312:
1293:
1249:
986:
817:
692:
622:
405:
364:
334:
218:
208:
1120:
2160:
2056:
2051:
2026:
2016:
1977:
1798:
1753:
1481:
1446:
1382:
1340:
1325:
1281:
455:
1028:
An
Improved Device for Supporting or Suspending Electric Lamps and the like (1911)
918:
816:
works like this. A balancing arm (the forearm) has on one side of an axis a small
17:
438:
but is more vertical. The other spring lifts less weight but is more horizontal.
2201:
2155:
2031:
1890:
1810:
1618:
1613:
1573:
1545:
1540:
1471:
1466:
1451:
1330:
1134:
214:
191:
70:
2145:
2011:
2006:
1895:
1858:
1841:
1773:
1768:
1743:
1438:
1032:
899:
688:
30:
2191:
2088:
2041:
1630:
1606:
1535:
1515:
892:
458:
199:
coil springs working in parallel on both sides of the pivoting arm is used.
1923:
1863:
1568:
1560:
1530:
1491:
1456:
1426:
1409:
1215:
944:
558:
503:
224:
1875:
1820:
1520:
1498:
169:
1503:
1461:
1163:
825:. The two axes have a different angle, and this has some advantages.
754:
499:
435:
181:
2186:
1550:
1476:
939:
886:
813:
430:
241:
187:
There are different methods to balance the arms and the lamp-cap:
29:
561:
between the twisted arm controls the movement between the arms.
51:
1188:
372:
Single forearm bar, one parallelogram, two tension spring sets
454:
One compression spring controls a very short arm (grey). The
917:
866:
850:
830:
745:
721:
702:
678:
612:
576:
548:
469:
445:
420:
391:
375:
350:
324:
298:
282:
266:
69:
1184:
429:
The short arms (green) stay parallel. One spring puts pull
1176:"Rebel'n adventurous myster shadow-sky's free discography"
929:. The gravity compress the air in the pneumatic cylinder.
621:
This construction uses a chain to keep the arm with the
333:
One tension spring set controls the forearm, which is a
478:
In this method, just one compression spring controls a
246:
Compression and tension springs at rest and under load
54:
L-1), as well as other devices, use this principle.
2169:
2124:
2065:
1988:
1904:
1829:
1699:
1639:
1587:
1559:
1437:
1339:
1311:
1302:
1222:
843:Here are some less common ways of balancing arms.
687:This lamp has a heavy base, with a parallelogram
303:A single spring controlling upper arm and forearm
699:One parallelogram with an extended counterweight
347:One parallelogram and two extension spring sets
250:There are many variations of construction with
538:The arms are balanced by pressure and friction
150:The same overall mechanism can be employed in
1200:
8:
1144:EP1274545 2003 mechanical coupling devices
154:devices with similar requirements, such as:
27:Lamp with an adjustable balanced folding arm
718:Three parallelograms with one counterweight
474:A compression spring with one parallelogram
466:A compression spring with one parallelogram
263:Spring-balanced upper arm, flexible forearm
140:(in many cases fitted with springs), and a
1308:
1207:
1193:
1185:
1021:International patent category: B23B31/171
960:balanced arm lamp as a musical instrument.
585:This arm system also works with friction.
172:and theory behind balanced-arm lamps, see
806:Lamp with two arms and two counterweights
112:for the five basic parts of these lamps.
675:One parallelogram with one counterweight
329:An upper arm showing three parallel bars
1156:
1042:1923 parallelogram & counter weight
683:One parallelogram and one counterweight
489:Lamps balanced by pressure and friction
434:same size; one spring has to lift more
295:Two arms, one spring, one toothed wheel
910:to control the forearm and upper arm.
7:
742:A single arm with two counterweights
201:(They function in the same way as a
317:Two parallelograms and two tension
67:This article uses the terminology:
494:Rubber between two "parallel" arms
25:
997:Mechanical engineering technology
972:Engineering science and mechanics
589:Lamps balanced with counterweight
442:Compression springs near the foot
50:, originator of the concept, and
793:
781:
769:
761:Two arms with two counterweights
525:
513:
450:Spring-balanced bending arm lamp
380:Diagram of a single-forearm lamp
161:microphone holders in studios or
1724:Parabolic aluminized reflector
1066:FR784932 1935 CARWARDINE GEORGE
1063:FR757890 1934 CARWARDINE GEORGE
1018:Classifications IPC: F21V21/26
581:Another lamp with flexible bars
425:Compression springs in the arms
417:Compression springs in the arms
396:Tension springs within the arms
388:Tension springs within the arms
34:Anglepoise model 1227 from 1935
1669:Hydrargyrum medium-arc iodide
1078:1938 2 parallelogram 2 springs
1060:1934 spring and counter weight
502:in the gap, and the resulting
368:as the upper arm and forearm.
227:between parts of the lamp arm,
1:
957:Les Percussions de Strasbourg
233:hydraulics or pneumatic arms.
213:(a method frequently used in
871:Mechanical locking jointlamp
855:Lamps having a vertical axis
847:Lamps having a vertical axis
1914:Automotive light bulb types
1764:Intelligent street lighting
863:Mechanical coupling devices
238:Lamps balanced with springs
2251:
1677:Hydrargyrum quartz iodide
1096:1947 friction and a spring
1090:19.. a-symmetric arm-lamp
904:Schouwburgplein, Rotterdam
646:= counterweight to base; m
279:Tension spring over wheels
120:A balanced-arm lamp has a
2116:Stage lighting instrument
1121:U.S. patent 3003737A11961
839:Lamps using other systems
650:= weight of counterweight
164:computer display holders.
158:copy holders for typists,
2177:Battlefield illumination
1934:high-intensity discharge
1366:Electrochemiluminescence
617:Single weight chain lamp
506:holds the arm in place.
287:A spring over two wheels
2037:Electroluminescent wire
1084:1939 2 pressure springs
553:Lamp with flexible bars
195:In some cases a set of
1719:Multifaceted reflector
1108:1949 spring in the arm
922:
895:
891:Moving streetlamps in
872:
856:
835:
750:
726:
707:
684:
618:
609:A single counterweight
582:
554:
545:Friction from twisting
475:
451:
426:
397:
381:
356:
330:
304:
288:
272:
247:
74:
35:
2109:ellipsoidal reflector
1714:Ellipsoidal reflector
1398:Fluorescent induction
1376:field-induced polymer
1135:U.S. patent 5333103A1
1054:1929 2 counter weight
1033:U.S. patent 1,370,231
921:
890:
870:
854:
834:
812:A lamp type like the
749:
725:
706:
682:
633:= Lamp-cap to base; m
616:
580:
565:Friction between the
552:
473:
449:
424:
395:
379:
355:Anglepoise-style lamp
354:
328:
302:
286:
270:
245:
73:
42:, sometimes called a
33:
1946:Rear position lights
1919:Daytime running lamp
1847:Mechanically powered
1734:Aviation obstruction
1036:- 1921 harmonica arm
992:Mechanical advantage
823:Museum of Modern Art
733:Lamps balanced with
637:= weight of lamp-cap
594:Lamps balanced with
532:Squeezing rubber arm
1354:Electron-stimulated
908:hydraulic cylinders
875:This lamp works by
800:New Correct Diagram
520:Friction rubber arm
412:Compression springs
312:Two tension springs
174:Classical mechanics
2197:Luminous gemstones
1371:Electroluminescent
1349:Cathodoluminescent
933:In popular culture
927:pneumatic cylinder
923:
896:
873:
857:
836:
751:
727:
708:
685:
619:
583:
555:
476:
452:
427:
398:
382:
357:
331:
305:
289:
273:
271:A flexible forearm
258:One tension spring
248:
132:, (in most cases)
116:The general design
75:
36:
18:Balanced arm lamps
2222:
2221:
1739:Balanced-arm lamp
1695:
1694:
1579:Yablochkov candle
1447:Acetylene/Carbide
1417:Radioluminescence
1289:Luminous efficacy
1235:Color temperature
1114:1954 friction arm
982:Industrial design
952:Myster Shadow-Sky
898:The pivoting arm
776:Dimension diagram
402:Tolomeo desk lamp
44:floating arm lamp
40:balanced-arm lamp
16:(Redirected from
2242:
2022:Christmas lights
1956:Safety reflector
1951:Reversing lights
1886:Navigation light
1837:Bicycle lighting
1727:
1680:
1672:
1646:
1405:Photoluminescent
1388:Fluorescent lamp
1361:Chemiluminescent
1309:
1277:Bi-pin lamp base
1272:Lightbulb socket
1209:
1202:
1195:
1186:
1180:
1179:
1172:
1166:
1161:
1137:
1123:
1035:
1002:Moment (physics)
925:Arm lamp with a
797:
785:
773:
529:
517:
480:pantographic arm
400:A lamp like the
359:A lamp like the
21:
2250:
2249:
2245:
2244:
2243:
2241:
2240:
2239:
2225:
2224:
2223:
2218:
2182:Bioluminescence
2165:
2134:
2120:
2077:
2061:
2000:
1984:
1900:
1825:
1749:Emergency light
1725:
1691:
1678:
1670:
1644:
1642:
1635:
1583:
1555:
1526:Magnesium torch
1433:
1335:
1304:
1298:
1255:Light pollution
1230:Accent lighting
1218:
1213:
1183:
1174:
1173:
1169:
1162:
1158:
1154:
1148:
1133:
1119:
1031:
1016:
1014:Patents history
1011:
967:
935:
916:
885:
865:
849:
841:
810:
809:
808:
807:
803:
802:
801:
798:
790:
789:
786:
778:
777:
774:
763:
744:
739:
720:
701:
677:
670:
666:
662:
658:
649:
645:
636:
632:
611:
600:
591:
575:
547:
542:
541:
540:
539:
535:
534:
533:
530:
522:
521:
518:
496:
491:
485:
468:
444:
419:
414:
390:
374:
361:Anglepoise lamp
349:
323:
314:
297:
281:
265:
260:
240:
212:
200:
194:
118:
65:
60:
28:
23:
22:
15:
12:
11:
5:
2248:
2246:
2238:
2237:
2235:Light fixtures
2227:
2226:
2220:
2219:
2217:
2216:
2215:
2214:
2204:
2199:
2194:
2189:
2184:
2179:
2173:
2171:
2170:Related topics
2167:
2166:
2164:
2163:
2158:
2153:
2148:
2143:
2137:
2135:
2133:
2132:
2129:
2125:
2122:
2121:
2119:
2118:
2113:
2112:
2111:
2101:
2096:
2091:
2086:
2080:
2078:
2076:
2075:
2072:
2066:
2063:
2062:
2060:
2059:
2054:
2049:
2044:
2039:
2034:
2029:
2024:
2019:
2014:
2009:
2003:
2001:
1999:
1998:
1993:
1989:
1986:
1985:
1983:
1982:
1981:
1980:
1970:
1965:
1964:
1963:
1961:retroreflector
1953:
1948:
1943:
1942:
1941:
1936:
1931:
1921:
1916:
1910:
1908:
1902:
1901:
1899:
1898:
1893:
1888:
1883:
1878:
1873:
1872:
1871:
1861:
1856:
1855:
1854:
1849:
1839:
1833:
1831:
1827:
1826:
1824:
1823:
1818:
1816:Track lighting
1813:
1808:
1807:
1806:
1796:
1791:
1789:Recessed light
1786:
1781:
1776:
1771:
1766:
1761:
1759:Gooseneck lamp
1756:
1751:
1746:
1741:
1736:
1731:
1730:
1729:
1721:
1716:
1705:
1703:
1697:
1696:
1693:
1692:
1690:
1689:
1684:
1683:
1682:
1674:
1666:
1656:
1650:
1648:
1641:High-intensity
1637:
1636:
1634:
1633:
1628:
1623:
1622:
1621:
1611:
1610:
1609:
1599:
1593:
1591:
1585:
1584:
1582:
1581:
1576:
1571:
1565:
1563:
1557:
1556:
1554:
1553:
1548:
1543:
1538:
1533:
1528:
1523:
1518:
1513:
1512:
1511:
1506:
1496:
1495:
1494:
1484:
1479:
1474:
1469:
1464:
1459:
1454:
1449:
1443:
1441:
1435:
1434:
1432:
1431:
1430:
1429:
1419:
1414:
1413:
1412:
1410:Laser headlamp
1402:
1401:
1400:
1395:
1380:
1379:
1378:
1368:
1363:
1358:
1357:
1356:
1345:
1343:
1337:
1336:
1334:
1333:
1328:
1323:
1317:
1315:
1306:
1300:
1299:
1297:
1296:
1291:
1286:
1285:
1284:
1279:
1269:
1268:
1267:
1262:
1252:
1247:
1242:
1240:Electric light
1237:
1232:
1226:
1224:
1220:
1219:
1214:
1212:
1211:
1204:
1197:
1189:
1182:
1181:
1167:
1155:
1153:
1150:
1146:
1145:
1142:
1141:EP0518569 1992
1139:
1131:
1125:
1116:
1115:
1109:
1103:
1097:
1091:
1085:
1079:
1073:
1067:
1064:
1061:
1055:
1049:
1043:
1037:
1029:
1015:
1012:
1010:
1009:
1007:Torsion spring
1004:
999:
994:
989:
984:
979:
977:Gooseneck lamp
974:
968:
966:
963:
962:
961:
949:
934:
931:
915:
912:
906:use a pair of
884:
881:
864:
861:
848:
845:
840:
837:
805:
804:
799:
792:
791:
788:Outer position
787:
780:
779:
775:
768:
767:
766:
765:
764:
762:
759:
743:
740:
738:
737:counterweights
731:
719:
716:
700:
697:
676:
673:
672:
671:
668:
664:
660:
656:
652:
651:
647:
643:
639:
638:
634:
630:
610:
607:
599:
592:
590:
587:
574:
563:
546:
543:
537:
536:
531:
524:
523:
519:
512:
511:
510:
509:
508:
495:
492:
490:
487:
467:
464:
443:
440:
418:
415:
413:
410:
406:parallelograms
389:
386:
373:
370:
348:
345:
322:
315:
313:
310:
296:
293:
280:
277:
264:
261:
259:
256:
239:
236:
235:
234:
231:
228:
222:
219:drawing boards
206:
166:
165:
162:
159:
117:
114:
110:
109:
104:
94:
88:
82:
64:
63:The five terms
61:
59:
56:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
2247:
2236:
2233:
2232:
2230:
2213:
2210:
2209:
2208:
2205:
2203:
2200:
2198:
2195:
2193:
2190:
2188:
2185:
2183:
2180:
2178:
2175:
2174:
2172:
2168:
2162:
2159:
2157:
2154:
2152:
2151:Infrared lamp
2149:
2147:
2144:
2142:
2139:
2138:
2136:
2130:
2127:
2126:
2123:
2117:
2114:
2110:
2107:
2106:
2105:
2102:
2100:
2097:
2095:
2092:
2090:
2087:
2085:
2082:
2081:
2079:
2073:
2071:
2068:
2067:
2064:
2058:
2055:
2053:
2050:
2048:
2045:
2043:
2040:
2038:
2035:
2033:
2030:
2028:
2025:
2023:
2020:
2018:
2015:
2013:
2010:
2008:
2005:
2004:
2002:
1997:
1994:
1991:
1990:
1987:
1979:
1976:
1975:
1974:
1971:
1969:
1966:
1962:
1959:
1958:
1957:
1954:
1952:
1949:
1947:
1944:
1940:
1937:
1935:
1932:
1930:
1927:
1926:
1925:
1922:
1920:
1917:
1915:
1912:
1911:
1909:
1907:
1903:
1897:
1894:
1892:
1889:
1887:
1884:
1882:
1881:Laser pointer
1879:
1877:
1874:
1870:
1867:
1866:
1865:
1862:
1860:
1857:
1853:
1850:
1848:
1845:
1844:
1843:
1840:
1838:
1835:
1834:
1832:
1828:
1822:
1819:
1817:
1814:
1812:
1809:
1805:
1802:
1801:
1800:
1797:
1795:
1792:
1790:
1787:
1785:
1784:Pendant light
1782:
1780:
1779:Neon lighting
1777:
1775:
1772:
1770:
1767:
1765:
1762:
1760:
1757:
1755:
1752:
1750:
1747:
1745:
1742:
1740:
1737:
1735:
1732:
1728:
1722:
1720:
1717:
1715:
1712:
1711:
1710:
1707:
1706:
1704:
1702:
1698:
1688:
1685:
1681:
1675:
1673:
1667:
1665:
1662:
1661:
1660:
1657:
1655:
1654:Mercury-vapor
1652:
1651:
1649:
1647:
1638:
1632:
1629:
1627:
1624:
1620:
1617:
1616:
1615:
1612:
1608:
1605:
1604:
1603:
1600:
1598:
1597:Deuterium arc
1595:
1594:
1592:
1590:
1589:Gas discharge
1586:
1580:
1577:
1575:
1572:
1570:
1567:
1566:
1564:
1562:
1558:
1552:
1549:
1547:
1544:
1542:
1539:
1537:
1534:
1532:
1529:
1527:
1524:
1522:
1519:
1517:
1514:
1510:
1507:
1505:
1502:
1501:
1500:
1497:
1493:
1490:
1489:
1488:
1485:
1483:
1480:
1478:
1475:
1473:
1470:
1468:
1465:
1463:
1460:
1458:
1455:
1453:
1450:
1448:
1445:
1444:
1442:
1440:
1436:
1428:
1425:
1424:
1423:
1420:
1418:
1415:
1411:
1408:
1407:
1406:
1403:
1399:
1396:
1393:
1389:
1386:
1385:
1384:
1381:
1377:
1374:
1373:
1372:
1369:
1367:
1364:
1362:
1359:
1355:
1352:
1351:
1350:
1347:
1346:
1344:
1342:
1338:
1332:
1329:
1327:
1324:
1322:
1319:
1318:
1316:
1314:
1310:
1307:
1301:
1295:
1294:Task lighting
1292:
1290:
1287:
1283:
1280:
1278:
1275:
1274:
1273:
1270:
1266:
1263:
1261:
1258:
1257:
1256:
1253:
1251:
1250:Light fixture
1248:
1246:
1243:
1241:
1238:
1236:
1233:
1231:
1228:
1227:
1225:
1221:
1217:
1210:
1205:
1203:
1198:
1196:
1191:
1190:
1187:
1177:
1171:
1168:
1165:
1160:
1157:
1151:
1149:
1143:
1140:
1136:
1132:
1129:
1126:
1122:
1118:
1117:
1113:
1110:
1107:
1104:
1101:
1098:
1095:
1092:
1089:
1086:
1083:
1080:
1077:
1074:
1072:1937 friction
1071:
1068:
1065:
1062:
1059:
1056:
1053:
1050:
1048:1926 friction
1047:
1044:
1041:
1038:
1034:
1030:
1027:
1024:
1023:
1022:
1019:
1013:
1008:
1005:
1003:
1000:
998:
995:
993:
990:
988:
987:Light fixture
985:
983:
980:
978:
975:
973:
970:
969:
964:
958:
953:
950:
947:
946:
941:
937:
936:
932:
930:
928:
920:
914:Pneumatic arm
913:
911:
909:
905:
901:
894:
889:
883:Hydraulic arm
882:
880:
878:
869:
862:
860:
853:
846:
844:
838:
833:
829:
826:
824:
819:
818:counterweight
815:
796:
784:
772:
760:
758:
756:
748:
741:
736:
732:
730:
724:
717:
715:
713:
705:
698:
696:
694:
693:counterweight
690:
681:
674:
654:
653:
641:
640:
628:
627:
626:
624:
623:counterweight
615:
608:
606:
603:
598:counterweight
597:
593:
588:
586:
579:
572:
568:
564:
562:
560:
551:
544:
528:
516:
507:
505:
501:
493:
488:
486:
483:
481:
472:
465:
463:
460:
457:
448:
441:
439:
437:
432:
423:
416:
411:
409:
407:
403:
394:
387:
385:
378:
371:
369:
366:
365:parallelogram
362:
353:
346:
344:
341:
336:
335:parallelogram
327:
320:
316:
311:
309:
301:
294:
292:
285:
278:
276:
269:
262:
257:
255:
253:
244:
237:
232:
229:
226:
223:
220:
216:
210:
209:counterweight
207:
204:
198:
193:
190:
189:
188:
185:
183:
179:
175:
171:
163:
160:
157:
156:
155:
153:
148:
145:
143:
139:
135:
131:
127:
123:
115:
113:
108:
105:
102:
98:
95:
92:
89:
86:
83:
80:
77:
76:
72:
68:
62:
58:Configuration
57:
55:
53:
49:
45:
41:
32:
19:
2057:Strobe light
2052:Plasma globe
2027:Crackle tube
2017:Bubble light
1978:trafficators
1973:Turn signals
1799:Street light
1754:Gas lighting
1738:
1687:Sodium vapor
1659:Metal-halide
1561:Electric arc
1313:Incandescent
1282:Edison screw
1170:
1159:
1147:
1020:
1017:
943:
924:
897:
874:
858:
842:
827:
811:
752:
734:
728:
709:
686:
620:
604:
601:
595:
584:
570:
569:arm and the
566:
556:
497:
484:
477:
456:Roller chain
453:
428:
399:
383:
358:
332:
306:
290:
274:
249:
215:Sash windows
202:
196:
192:coil springs
186:
167:
151:
149:
146:
141:
137:
133:
129:
125:
121:
119:
111:
106:
100:
96:
90:
84:
78:
66:
43:
39:
37:
2202:Signal lamp
2156:Stroboscope
2032:DJ lighting
1968:Stop lights
1939:sealed beam
1891:Searchlight
1631:Xenon flash
1574:Klieg light
1422:Solid-state
1383:Fluorescent
1341:Luminescent
1026:GB191104491
942:short film
900:streetlamps
230:Coupling or
2146:Grow light
2141:Germicidal
2131:Scientific
2128:Industrial
2084:Floodlight
2070:Theatrical
2012:Blacklight
2007:Aroma lamp
1996:Decorative
1906:Automotive
1896:Solar lamp
1859:Glow stick
1842:Flashlight
1774:Nightlight
1769:Light tube
1744:Chandelier
1701:Stationary
1643:discharge
1569:Carbon arc
1439:Combustion
1305:generation
1303:Methods of
1152:References
1128:GB1249774A
689:pantograph
136:connected
48:Anglepoise
2212:Reflected
2192:Light art
2104:Spotlight
2089:Footlight
2074:Cinematic
2042:Lava lamp
1804:in the US
1709:Reflector
1626:Xenon arc
1607:Neon lamp
1536:Rushlight
1516:Limelight
1265:Hong Kong
893:Rotterdam
712:stability
142:lamp-head
91:upper arm
2229:Category
1924:Headlamp
1864:Headlamp
1852:Tactical
1830:Portable
1811:Torchère
1492:Petromax
1487:Kerosene
1457:Campfire
1427:LED lamp
1223:Concepts
1216:Lighting
1164:See here
1112:GB713378
1106:GB629364
1100:GB618344
1094:GB589994
1088:GB536342
1082:GB504791
1076:GB489547
1070:GB470502
1058:GB481198
1052:GB285045
1046:GB254972
1040:GB206435
965:See also
945:Luxo Jr.
877:coupling
559:friction
504:friction
363:has one
225:Friction
205:spring.)
168:For the
79:lamp cap
2207:Sources
2161:Tanning
2047:Marquee
1992:Display
1876:Lantern
1869:outdoor
1821:Troffer
1664:ceramic
1521:Luchina
1499:Lantern
1392:compact
1390: (
1326:Halogen
1321:Regular
902:in the
404:has no
340:linkage
252:springs
178:linkage
170:physics
85:forearm
1929:hidden
1794:Sconce
1619:Sulfur
1614:Plasma
1546:Tilley
1541:Safety
1504:Fanous
1467:Carcel
1462:Candle
1452:Argand
1331:Nernst
1260:Hawaii
755:weight
500:rubber
436:weight
319:spring
203:single
182:torque
2187:Laser
2099:Scoop
1726:(PAR)
1679:(HQI)
1671:(HMI)
1645:(HID)
1551:Torch
1509:Paper
1477:Flare
1245:Glare
940:Pixar
814:Tizio
567:upper
459:cable
431:force
152:other
126:stand
97:stand
2094:Gobo
1602:Neon
1472:Diya
1138:1991
1130:1971
1124:1961
1102:1949
571:fore
557:The
321:sets
217:and
180:and
138:arms
130:body
124:, a
122:base
107:base
101:body
52:Luxo
1531:Oil
1482:Gas
735:two
667:× d
663:= m
659:× d
596:one
573:arm
211:(s)
197:two
134:two
128:or
103:and
99:or
2231::
482:.
221:).
184:.
176:,
144:.
38:A
1394:)
1208:e
1201:t
1194:v
1178:.
669:2
665:2
661:1
657:1
655:m
648:2
644:2
642:d
635:1
631:1
629:d
93:,
87:,
81:,
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
