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    • 145. 发明授权
    • SOUND REPRODUCTION SYSTEMS
    • 声音再现系统
    • EP0046765B1
    • 1983-12-07
    • EP81900334.4
    • 1981-02-12
    • NATIONAL RESEARCH DEVELOPMENT CORPORATION
    • GERZON, Michael Anthony
    • H04S3/02
    • H04S3/02H04S2420/11
    • Decoder for feeding an irregular array of m (being three or more) pairs of diametrically opposite loudspeakers, each loudspeaker being disposed at an equal distance r from a common reference point. The decoder incorporates a WXY circuit (10) for producing output signals (W, X, Y and -jW) from the input signals, and shelf filters (12, 14, 16 and 22) and high-pass filters (18, 20 and 24) for producing output signals (W', X', Y' and -jW(Alpha)). In addition the decoder includes an amplitude matrix circuit (26) which is such that the sum of the signals (S(Alpha) and S(Alpha) fed to the loudspeakers of each pair is the same of all pairs of loudspeakers and (FORMULA) where (FORMULA) M being the 2 x m matrix (FORMULA) K being the mx 2 matrix (FORMULA) I being the 2 x 2 identity matrix, and X being a positive real constant which may be frequency dependent. A decoder is also provided for feeding a three-dimensional loudspeaker layout. Thus the outputs of the loudspeakers may be adapted to irregular positioning of the loudspeakers which may be dictated by room geometry.
    • 148. 发明公开
    • Spraying
    • EP0094796A1
    • 1983-11-23
    • EP83302698.2
    • 1983-05-12
    • NATIONAL RESEARCH DEVELOPMENT CORPORATION
    • Arnold, Arthur John
    • A01M7/00B05B3/10B05B5/04
    • B05B3/1064A01M7/0028B05B5/0407B05B5/0415
    • A spraying head arrangement in which the spray forming part (40), the liquid feed (70) and the drive to rotate the spray forming part (60) are all behind the region from which the spray emerges. This is achieved by feeding the liquid through the spray forming means (40), conveniently through the smaller end of a conical spray forming cup (41) supported by a bearing (30) at this smaller end. Variable ratio belt drive (62) can be applied at the smaller end. Liquid is distributed inside the cup (41) by a plate (45). Electrostatic charge can be applied to the spray. A point electrode (52), or electrodes near the axis of the cup (41) cooperates with the surface electrode (55) on the distributor plate (45) and another surface electrode (54) on the inside of the cup (41) to charge the spray when the point electrode (52) is energised, conveniently through an insulated conductor arranged near the axis and along the liquid feed path (22). A peristaltic pump (70) can be arranged to control the liquid feed through a simple push-in connection. Jets and other narrow passages are thus avoided. The pump speed can be varied to control the spray rate.
    • 一种喷雾头装置,其中喷雾形成部件(40),液体供给装置(70)和用于旋转喷雾形成部件(60)的驱动装置全部位于喷雾出现的区域的后方。 这是通过将液体通过喷雾形成装置(40)喂入,方便地通过在该较小端由轴承(30)支撑的锥形喷雾成形杯(41)的较小端来实现的。 变比皮带传动装置(62)可以应用在较小的一端。 液体通过板(45)分布在杯(41)内。 静电荷可以施加到喷雾上。 点电极(52)或靠近杯(41)的轴线的电极与分配板(45)上的表面电极(55)以及杯(41)至(41)内侧上的另一表面电极(54) 当点电极(52)通电时,方便地通过布置在轴附近并沿着液体供给路径(22)布置的绝缘导体来给喷雾充电。 蠕动泵(70)可以布置成通过简单的推入式连接来控制液体进料。 因此避免了喷气机和其他狭窄的通道。 泵速可以改变以控制喷雾速率。