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1. 发明授权

US4229619A Method and apparatus for driving a multi way speaker system 失效
标题翻译：用于驱动多路扬声器系统的方法和装置
公开(公告)号：US4229619A
公开(公告)日：1980-10-21
申请号：US956265
申请日：1978-10-31
申请人： Nobuaki Takahashi , Eiichi Funasaka , Masanobu Shinozaki , Yasuo Kaizu
发明人： Nobuaki Takahashi , Eiichi Funasaka , Masanobu Shinozaki , Yasuo Kaizu
IPC分类号： H04R3/14 , H04R3/00
CPC分类号： H04R3/02 , H04R3/14 , H04R3/04
摘要： A multi way speaker system comprises an amplifier, frequency dividing network including a plurality of filters, a plurality of speakers respectively responsive to the output signals of the filters, and a summing circuit responsive to the output signals of the filters for producing a composite signal to be fed back to the input of the amplifier to establish a negative feedback loop. Because of the feedback loop undesirable influences by various elements included in the filters are diminished and thus the speakers reproduce audio frequencies with high fidelity. At least one equalizer may be employed in the feedback loop, while auxiliary filters may be used in such a manner that the output terminals of the auxiliary filters are connected to only the summing circuit so that the output signals of the auxiliary filters are added to an output signal of at least one filter of the frequency dividing network. In order to supply the network with the output signal of the amplifier and to feed the composite signal back to the amplifier a three-wire coaxial cable may be used. The three-wire coaxial cable is used in such a manner that the composite signal flows through a conductor which is shielded by another conductor carrying the output signal of the amplifier. A switch and a resistor network may be used in the feedback loop for avoiding undesirable oscillation and output level variation.
摘要翻译：多路扬声器系统包括放大器，包括多个滤波器的分频网络，分别响应于滤波器的输出信号的多个扬声器，以及响应于滤波器的输出信号的求和电路，用于产生复合信号反馈到放大器的输入以建立负反馈回路。由于反馈回路，包括在滤波器中的各种元件的不期望的影响减小，因此扬声器以高保真度再现音频。在反馈回路中可以采用至少一个均衡器，而辅助滤波器可以以这样的方式使用：辅助滤波器的输出端仅与求和电路连接，使得辅助滤波器的输出信号被加到分频网络的至少一个滤波器的输出信号。为了向网络提供放大器的输出信号，并将复合信号反馈给放大器，可以使用三线同轴电缆。三线同轴电缆的使用方式是复合信号流过导体，导体由承载放大器输出信号的另一个导体屏蔽。可以在反馈回路中使用开关和电阻网络，以避免不期望的振荡和输出电平变化。

2. 发明授权

US3934158A Switching circuit 失效
标题翻译：开关电路
公开(公告)号：US3934158A
公开(公告)日：1976-01-20
申请号：US446320
申请日：1974-02-27
申请人： Masanobu Shinozaki
发明人： Masanobu Shinozaki
IPC分类号： H03F1/52 , H03F1/42 , H03F3/20 , H03F3/30 , H04R3/00 , H03K17/00
CPC分类号： H04R3/00
摘要： An improved switching means is provided in a loudspeaker system, which includes a power amplifier of direct coupled type having no output condensor to deliver an audio-frequency current to the loudspeaker, to eliminate undesirable effects by rapidly breaking an electrical connection between the power amplifier and the loudspeaker upon cutting off an a.c. power source. The switching means comprises circuitry having a remarkably short "time constant" compared with another circuitry provided outside the switching means but within the loudspeaker system, so that the above-mentioned rapid breaking is accomplished.
摘要翻译：在扬声器系统中提供了一种改进的开关装置，其包括直接耦合型功率放大器，其没有输出电容器，以将音频电流传递到扬声器，以通过快速断开功率放大器与功率放大器之间的电连接来消除不期望的影响扬声器在切断交流电时能量源。开关装置包括与设置在开关装置外部但在扬声器系统内的另一电路相比具有非常短的“时间常数”的电路，从而实现了上述的快速断开。

3. 发明授权

US4627416A Water heater 失效
标题翻译：热水器
公开(公告)号：US4627416A
公开(公告)日：1986-12-09
申请号：US586603
申请日：1984-03-06
申请人： Hiroshi Ito , Kanae Aida , Masanobu Shinozaki , Masahiko Koumura , Kazumi Tamada , Katsushi Mizutani
发明人： Hiroshi Ito , Kanae Aida , Masanobu Shinozaki , Masahiko Koumura , Kazumi Tamada , Katsushi Mizutani
IPC分类号： F23N1/08 , F23N5/10 , F23H1/00
CPC分类号： F23N1/085 , F23N5/105 , F23N2025/02 , F23N2027/22 , F23N2035/14 , F23N2035/18 , F23N2035/20 , F23N2035/24
摘要： A water heater is disclosed having a heat exchanger, a main burner means for heating the heat exchanger, a standing burner, a main fuel passage means for supplying fuel to the main burner, a manual valve on the main fuel passage means which is operable by a manual operation member, an automatic valve disposed on the main fuel passage means at a point downstream from the manual valve, the automatic valve adapted to open in response to the pressure of a supply of water at a water pressure sensitive member, and a standing burner fuel passage means for supplying fuel to the standing burner, the standing burner fuel passage means drawing fuel from the main fuel passage means at a point in between the manual valve and the automatic valve. Also provided is a lock means engageable with manual operation member for preventing the manual operation member from opening the manual valve during the engagement, the lock means being operable by the water pressure sensitive member such that when no supply of water is sensed by the water pressure sensitive member, the lock means does not become engaged with the manual operation member.
摘要翻译：公开了一种热水器，其具有热交换器，用于加热热交换器的主燃烧器装置，立式燃烧器，用于向主燃烧器供应燃料的主燃料通道装置，主燃料通道装置上的手动阀，其可由手动操作构件，在手动阀下游的点处设置在主燃料通道装置上的自动阀，适于响应于在水压敏构件处的水供应的压力而打开的自动阀，以及站立用于向立式燃烧器供给燃料的燃烧器燃料通道装置，所述立式燃烧器燃料通道装置在手动阀和自动阀之间的点处从主燃料通道装置抽取燃料。还提供了一种可与手动操作构件接合的锁定装置，用于防止手动操作构件在接合期间打开手动阀，锁定装置可由水压敏构件操作，使得当水压未被水压感测时所述锁定装置不会与所述手动操作部件接合。

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