公开(公告)号：US3931549A

公开(公告)日：1976-01-06

申请号：US517681

申请日：1974-10-24

Applicant: Charles Berns ,  Jacob Neuhof

Inventor： Charles Berns ,  Jacob Neuhof

IPC: B06B1/02 ,  H03K17/64 ,  H01H47/32

CPC classification number: B06B1/0261 ,  H03K17/64 ,  B06B2201/53

Abstract: An electronic circuit including a transistor which is biased to conduction is provided to initiate actuation of an electromagnetic transducer. The transducer has first and second coils one of which actuates the sounder. A potential is induced in the other coil and this induced potential is used to cut off the transistor. The next cycle of operation is initiated when the induced potential falls below a predetermined value in response to the reduction of the magnetic flux which, in turn, was the result of the transistor having been cut off.

Abstract translation: 提供包括偏置于导通的晶体管的电子电路以启动电磁换能器的致动。 换能器具有第一和第二线圈，其中一个驱动发声器。 在另一个线圈中感应出一个电位，这个感应电位被用来切断晶体管。 当感应电位下降到预定值以下时，开始下一个操作周期，这是由于晶体管被切断的结果导致磁通量的减小。

公开(公告)号：US3938141A

公开(公告)日：1976-02-10

申请号：US538995

申请日：1975-01-06

Applicant: Jacob Neuhof

Inventor： Jacob Neuhof

IPC: G10K9/22 ,  G08B3/00

CPC classification number: G10K9/22

Abstract: A housing for a horn or like electro-acoustic element is provided, including a cover which will snap on the horn or the like by the application of slight pressure; however, removal of such cover from the horn requires significantly greater effort. Accordingly, a firm and long-lasting panel mounting is enabled.

Abstract translation: 提供了一种用于喇叭或类似电声元件的外壳，其包括通过施加轻微的压力将卡在喇叭等上的盖子; 然而，从喇叭去除这样的盖子需要显着更大的努力。 因此，能够实现牢固而持久的面板安装。

公开(公告)号：US4065767A

公开(公告)日：1977-12-27

申请号：US719644

申请日：1976-09-01

Applicant: Jacob Neuhof ,  Robert D. Scott

Inventor： Jacob Neuhof ,  Robert D. Scott

IPC: G08B3/10 ,  G10K15/02 ,  G08B3/00

CPC classification number: G08B3/10 ,  G10K15/02

Abstract: A dynamic loudspeaker is driven by chopped d.c. from the collector of a transistor. A free wheeling diode is connected in parallel with the speaker circuit to dissipate the inductive energy in the speaker voice coil when the transistor is turned off. The transistor is controlled by a voltage controlled oscillator which, under control of other elements, can be made to produce a wide variety of cyclically varying output signals for producing a wide range of sounds, tones and signals from the loudspeaker. This permits selection of a tone which differs sufficiently from the ambient noise to assure attracting attention. By the use of chopped d.c. to drive the speaker, the expense, weight and bulk of an impedance matching transformer is eliminated. A plurality of individually operable switches are provided for switching circuit elements in and out of circuit to modify wave shapes and alter sound output. Another group of individually operable switches mixes selected wave shapes to produce various compound waves and produce additional sound variations. One switch provides pitch control and another provides output volume control.

Abstract translation: 动态扬声器由切碎的直流电驱动。 从晶体管的集电极。 一个续流二极管与扬声器电路并联连接，以在晶体管断开时消散扬声器音圈中的感应能量。 晶体管由电压控制的振荡器控制，其在其它元件的控制下可以产生各种各样的循环变化的输出信号，用于产生来自扬声器的大范围的声音，音调和信号。 这允许选择与环境噪声充分不同的音调，以确保引起注意。 通过使用切碎的直径 为了驱动扬声器，消除了阻抗匹配变压器的费用，重量和体积。 提供多个单独可操作的开关，用于将电路元件进出电路切换以修改波形并改变声音输出。 另一组可单独操作的开关混合所选择的波形以产生各种复合波并产生额外的声音变化。 一个开关提供音调控制，另一个提供输出音量控制。

公开(公告)号：US4016376A

公开(公告)日：1977-04-05

申请号：US647633

申请日：1976-01-08

Applicant: Jacob Neuhof

Inventor： Jacob Neuhof

IPC: H04R7/22 ,  H04R13/00

CPC classification number: H04R7/22 ,  H04R13/00

Abstract: An electro-acoustic transducer, adapted to constitute part of an alarm unit, includes a magnetic diaphragm adjacent the core of the transducer. The case for the transducer is so configured that it forces the diaphragm into a concave shape, whereby the diaphragm operates extremely efficiently and provides other advantages over a planar diaphragm.

Abstract translation: 适于构成报警单元的一部分的电声换能器包括邻近换能器芯的磁膜片。 换能器的情况是这样构造的，即它迫使隔膜成为凹形，由此隔膜非常有效地工作并且提供了超过平面隔膜的其它优点。