公开(公告)号：US3619712A

公开(公告)日：1971-11-09

申请号：US3619712D

申请日：1969-10-22

Applicant: DURO TEST CORP

Inventor： KOO RONALD C ,  SHURGAN JOEL

IPC: H01K1/62 ,  H01J7/44 ,  H05B39/00

CPC classification number: H01K1/62

Abstract: Incandescent lamps connected in circuits to keep a maintenance current flowing through the lamp filament when the lamp is off to improve the ductile-brittle properties of the filament. Lamps are also disclosed which have an internal impedance element to be used in the circuits for producing the maintenance current.

公开(公告)号：US3506364A

公开(公告)日：1970-04-14

申请号：US3506364D

申请日：1966-03-31

Applicant: DURO TEST CORP

Inventor： SHURGAN JOEL ,  THORINGTON LUKE

IPC: G01J3/46 ,  G01J1/42 ,  G01J1/44

CPC classification number: G01J3/46 ,  G01J3/465 ,  G01J3/513 ,  G01J3/524

公开(公告)号：US3877495A

公开(公告)日：1975-04-15

申请号：US44748174

申请日：1974-03-04

Applicant: DURO TEST CORP

Inventor： KOO RONALD C ,  SHURGAN JOEL

IPC: B21F3/04 ,  H01K1/08 ,  H01K3/02

CPC classification number: H01K3/02 ,  B21F3/04 ,  H01K1/08 ,  Y10T29/49812

Abstract: A method for manufacturing an annealed tungsten filament wire for electric lamps with a reduced amount of impurities in which the filament wire is wound on a mandrel, either the wire or the mandrel is coated with a protective material, the wire is annealed at an elevated temperature, and the wire is removed from the mandrel.

Abstract translation: 一种用于制造退火钨丝线的方法，其中将丝线卷绕在心轴上的杂质数量减少的电灯，线或心轴涂覆有保护材料，线材在高温下退火 并且将线从心轴移除。

公开(公告)号：US3898503A

公开(公告)日：1975-08-05

申请号：US9889970

申请日：1970-12-16

Applicant: DURO TEST CORP

Inventor： SHURGAN JOEL

IPC: H01J61/067 ,  H01J17/06

CPC classification number: H01J61/0672

Abstract: A dual cathode structure for a fluorescent lamp comprising a pair of electron emissive cathodes which are connected with a common junction and mounted to have an included angle therebetween. An anode flag is connected to the common junction to collect electrons when the filaments are operating in the anode half cycle. The collected electrons pass through one or both of the cathodes to diffuse the hot spot on the electrode. The lamp operates with reduced wattage with no decrease of light output.

Abstract translation: 一种用于荧光灯的双阴极结构，包括一对电子发射阴极，其与公共接头连接并且安装成在其间具有夹角。 当灯丝在阳极半周期中工作时，阳极标记连接到公共接头以收集电子。 收集的电子通过阴极中的一个或两个以扩散电极上的热点。 灯的功率降低，光输出没有降低。

公开(公告)号：US3662789A

公开(公告)日：1972-05-16

申请号：US3662789D

申请日：1970-08-24

Applicant: DURO TEST CORP

Inventor： KOO RONALD C ,  SHURGAN JOEL

IPC: B21F3/04 ,  H01K3/02 ,  B21F45/00

CPC classification number: B21F3/04 ,  H01K3/02

Abstract: A mandrel and a method for manufacturing filament coils for electric lamps. The mandrel is coated with a material, such as copper, which does not alloy with the filament coil during annealing. The coil is wound on the coated mandrel and the mandrel is dissolved after the filament is annealed.

Abstract translation: 一种心轴及其制造用于电灯的线圈的方法。 心轴在退火期间用诸如铜的材料涂覆，其不与丝线圈合金。 线圈被缠绕在涂覆的心轴上，并且心丝在丝退火之后溶解。

公开(公告)号：US3560786A

公开(公告)日：1971-02-02

申请号：US3560786D

申请日：1968-10-15

Applicant: DURO TEST CORP

Inventor： SHURGAN JOEL

IPC: H01J61/33 ,  H01J61/30 ,  H01J61/35

CPC classification number: H01J61/33

Abstract: A fluorescent lamp having at least one groove therein which is rotated on a curved path around and along the longitudinal axis of the lamp and which varies in depth.