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- A fire alarm box, fire alarm call box, or fire alarm pull box is a device used for notifying a fire department of a fire. Typically installed on street corners, they were the main means of summoning firefighters before the general availability of telephones. When the box is activated by turning a knob or pulling a hook, a spring-loaded wheel turns, tapping out a pulsed electrical signal corresponding to the box's number. A receiver at fire headquarters announces the alarm through flashing lights or tones, or via a pen recorder, and the box number is matched to a list of box locations. In modern installations a computer receives and translates the pulses; in unmanned installations in small communities, the box number may be sounded out by a horn or bell audible community-wide. Though fire alarm boxes remain in use, many communities have removed them, relying instead on the widespread availability of landline and cellular telephones. Cities like San Francisco still rely heavily on fire alarm boxes for redundancy in case of emergency. Some municipalities still maintain their fire alarm boxes near schools and other sensitive locations. (en)
- Een brand- en politiemelder is een paal langs de openbare weg waarmee de brandweer of politie kan worden gealarmeerd. (nl)
- 火灾警报器，或稱火警报警盒、火警箱，是用于通知消防部门火灾的装置。通常安装在街角，它们是在电话普及之前召唤消防员的主要手段。现在虽然仍有使用，但许多社区已将其删除，而是依赖于固定电话和移动电话。旧金山等城市仍然保留了火灾报警箱，以备紧急情况下使用。 当通过旋转旋钮或拉动挂钩激活盒子时，弹簧加载的轮子转动，敲出对应于盒子编号的脉冲电信号。消防总部的接收器通过闪烁的灯光或音调或通过笔记录器发出脉冲信号，并将盒子编号与盒子位置列表相匹配。 第一台电报火灾报警系统由William Francis Channing和Moses G. Farmer于1852年在马萨诸塞州波士顿开发。两年后，他们申请了“城市电磁火灾报警电报” 专利。 (zh)
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- Een brand- en politiemelder is een paal langs de openbare weg waarmee de brandweer of politie kan worden gealarmeerd. (nl)
- 火灾警报器，或稱火警报警盒、火警箱，是用于通知消防部门火灾的装置。通常安装在街角，它们是在电话普及之前召唤消防员的主要手段。现在虽然仍有使用，但许多社区已将其删除，而是依赖于固定电话和移动电话。旧金山等城市仍然保留了火灾报警箱，以备紧急情况下使用。 当通过旋转旋钮或拉动挂钩激活盒子时，弹簧加载的轮子转动，敲出对应于盒子编号的脉冲电信号。消防总部的接收器通过闪烁的灯光或音调或通过笔记录器发出脉冲信号，并将盒子编号与盒子位置列表相匹配。 第一台电报火灾报警系统由William Francis Channing和Moses G. Farmer于1852年在马萨诸塞州波士顿开发。两年后，他们申请了“城市电磁火灾报警电报” 专利。 (zh)
- A fire alarm box, fire alarm call box, or fire alarm pull box is a device used for notifying a fire department of a fire. Typically installed on street corners, they were the main means of summoning firefighters before the general availability of telephones. (en)
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- Fire alarm call box (en)
- Brand- en politiemelder (nl)
- 火警报警箱 (zh)
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