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公开(公告)号：US20190120461A1
公开(公告)日：2019-04-25
申请号：US15732327
申请日：2017-10-25
申请人： Mike Barnes , Gregory Shepherd
发明人： Mike Barnes , Gregory Shepherd
CPC分类号： F21V7/10 , F21L4/005 , F21V7/04 , F21V21/0885 , F21V23/04 , F21V29/50 , F21V29/70 , F21Y2115/10
摘要： A hand held flat flashlight about the size of a cell phone with a 3.8 degree tightly focused light beam angle with a folded light path optic.
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公开(公告)号：US6140729A
公开(公告)日：2000-10-31
申请号：US230680
申请日：1999-03-29
申请人： Charles Pollock , John David Wale , Mike Barnes
发明人： Charles Pollock , John David Wale , Mike Barnes
摘要： An electrical machine comprises a four-pole stator 2 provided with a field winding 10 and an armature winding 11, each of the windings 10, 11 being split into two coils 22, 23 or 24, 25 closely coupled and wound so that diametrically opposite portions of both coils are disposed within diametrically opposite stator slots. A two-pole rotor (not shown) without windings is rotatable within the stator 2, and a circuit is provided for energising the armature coils 24 and 25 when direct current is supplied to terminals 26 and 27 of the circuit. Switches 28 and 29 in series with the coils 24 and 25 are switched alternately to effect alternate energisation of the coils 24 and 25 so as to generate, as a result of the opposite winding of the coils, magnetomotive forces in opposite directions. Since each of the closely coupled coil 24 and 25 generates a magnetomotive force in a respective direction, each coil needs to be energised with current in only one direction so that a relatively simple excitation circuit can be used.
摘要翻译： PCT No.PCT / GB97 / 02019 Sec。 371 1999年3月29日第 102（e）1999年3月29日PCT PCT 1997年7月28日PCT公布。 第WO98 / 05112号公报 日期1998年2月5日电机包括设有励磁绕组10和电枢绕组11的四极定子2，每个绕组10,11分成两个紧密耦合和缠绕的线圈22,23或24,25 使得两个线圈的径向相对的部分设置在直径相对的定子槽内。 没有绕组的两极转子（未示出）可在定子2内旋转，并且当向电路的端子26和27提供直流电流时，设置电路用于对电枢线圈24和25通电。 与线圈24和25串联的开关28和29交替地切换以实现线圈24和25的交替激励，以便由于线圈的相反绕组而产生相反方向的磁动势。 由于紧密耦合的线圈24和25中的每一个在相应的方向上产生磁动势，所以每个线圈需要仅在一个方向上被电流激励，使得可以使用相对简单的激励电路。
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