公开(公告)号：US3873980A

公开(公告)日：1975-03-25

申请号：US41077673

申请日：1973-10-29

Applicant: ITT

Inventor： CARROLL GORDON S

IPC: H04R27/00 ,  G08B3/10 ,  H04Q3/10

CPC classification number: G08B3/10

Abstract: A communication system for an emergency vehicle including a provision for selectively producing plural automatically and manually controlled siren sounds, the sound broadcast of radio reception and the sound amplification of the input to a microphone. A complete momentary-contact, pushbutton console may be employed, if desired, by short circuiting all the inputs to ground except that corresponding to the mode of operation selected. Start up instability is also eliminated. A selector pushbutton performs the dual function of manual siren control. Negative feedback from the speaker is provided selectively for radio and public address sytem use. Common use of components reduces cost and complexity. For example, common use of a voltage controlled oscillator, two amplifier stages, a driver and a speaker assembly is made. Radio input is turned on by an alternate action switch. As described in the specification, the action of ''''turning on'''' the radio shorts out all siren functions by firing silicon controlled rectifiers. The microphone input is turned on by pushing the ''''push to talk'''' switch thereon. This action fires all the siren shorting silicon controlled rectifiers through a pulse amplifier.

Abstract translation: 一种用于紧急车辆的通信系统，包括用于选择性地产生多个自动和手动控制的警笛声音，无线电接收的声音广播和对麦克风的输入的声音放大。 如果需要，可以采用完全瞬时接触的按钮控制台，除了对应于选择的操作模式之外，将所有输入端短路。 启动不稳定也被消除。 选择器按钮执行手动警号控制的双重功能。 有选择地为无线电和公共地址系统使用来自扬声器的负反馈。 组件的常见用途降低了成本和复杂性。 例如，通常使用压控振荡器，两个放大器级，驱动器和扬声器组件。 无线电输入由备用动作开关打开。 如说明书中所述，通过启动可控硅整流器，“打开”无线电的动作使所有警笛功能短路。 通过在其上推动“一键通”开关来打开麦克风输入。 该动作通过脉冲放大器触发所有的警号短路硅控整流器。

公开(公告)号：US3882275A

公开(公告)日：1975-05-06

申请号：US38488973

申请日：1973-08-02

Applicant: ITT

Inventor： CARROLL GORDON S

IPC: H04R27/04 ,  B06B1/02 ,  G07D9/00 ,  G10K15/04 ,  H04R27/00 ,  G08B3/10

CPC classification number: B06B1/0284

Abstract: A multipurpose sound communication system for use anywhere. This system may thus be used in a number of ways not described in the specification, but will be found useful in many, if not all, emergency vehicles including, but not limited to, ambulances and police patrol cars. The system employs one voltage controlled oscillator (VCO) with six selectively adjustable inputs. One of the inputs if OFF. Three inputs provide different corresponding siren sounds. One input places the radio on the speaker. Another input provides for public address and manual control of the siren. Speaker assembly negative feedbacks are provided for signal balance. Two negative feedbacks are selectively provided. A manual control circuit provides ramp voltages for siren control through the VCO. A transistor switch is driven to cut-off to prevent VCO operation when the siren frequency falls below a predetermined frequency.

Abstract translation: 多用途声音通信系统，用于任何地方。 因此，该系统可以以说明书中未描述的多种方式使用，但将被发现在许多（如果不是全部）紧急车辆中有用，包括但不限于救护车和警察巡逻车。 该系统采用一个具有六个可选择调节输入的压控振荡器（VCO）。 其中一个输入如果关闭。 三个输入提供不同的相应的警号声。 一个输入将收音机放在扬声器上。 另一个输入则提供公共地址和手动控制警报。 扬声器组件负反馈用于信号平衡。 有选择地提供两个负反馈。 手动控制电路通过VCO提供斜波电压以进行警号控制。 当警笛频率低于预定频率时，晶体管开关被驱动以截止以防止VCO操作。

公开(公告)号：US3930123A

公开(公告)日：1975-12-30

申请号：US50906774

申请日：1974-09-25

Applicant: ITT

Inventor： CARROLL GORDON S

IPC: G08B3/10

CPC classification number: G08B3/10

Abstract: A communication system for an emergency vehicle including a provision for selectively producing plural automatically and manually controlled siren sounds, the sound broadcast of radio reception and the sound amplification of the input to a microphone. A complete momentary-contact, pushbutton console may be employed, if desired, by short circuiting all the inputs to ground except that corresponding to the mode of operation selected. Start up instability is also eliminated. A selector pushbutton performs the dual function of manual siren control. Negative feedback from the speaker is provided selectively for radio and public address system use. Common use of components reduces cost and complexity. For example, common use of a voltage controlled oscillator, two amplifier stages, a driver and a speaker assembly is made. Radio input is turned on by an alternate action switch. As described in the specification, the action of ''''turning on'''' the radio shorts out all siren functions by firing silicon controlled rectifiers. The microphone input is turned on by pushing the ''''push to talk'''' switch thereon. This action fires all the siren shorting silicon controlled rectifiers through a pulse amplifier.