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- Bell System Alarm Relay, circa 1965 - Connected to a telephone, this signal relay could extend typical ringtones. It amplified the volume of ringing, and distinctive tones could be created for incoming calls: chimes, horns, and vibrating bells. A system like this was useful in loud industrial settings and large spaces.
- circa 1965
- Collections - Artifact
Bell System Alarm Relay, circa 1965
Connected to a telephone, this signal relay could extend typical ringtones. It amplified the volume of ringing, and distinctive tones could be created for incoming calls: chimes, horns, and vibrating bells. A system like this was useful in loud industrial settings and large spaces.
- Fire Alarm at Old Mill Creek, 1890-1915 - In 1890, Jenny Young Chandler, 25 years old and recently widowed, began working for the <EM>New York Herald</EM>. As a photojournalist and feature writer, Chandler captured life in Brooklyn, New York, and vicinity. By 1922, the time of her death, she had produced over 800 glass plate negatives. Her sensitive, insightful photographs depict people from all walks of life and the world in which they lived.
- 1890-1915
- Collections - Artifact
Fire Alarm at Old Mill Creek, 1890-1915
In 1890, Jenny Young Chandler, 25 years old and recently widowed, began working for the New York Herald. As a photojournalist and feature writer, Chandler captured life in Brooklyn, New York, and vicinity. By 1922, the time of her death, she had produced over 800 glass plate negatives. Her sensitive, insightful photographs depict people from all walks of life and the world in which they lived.
- Bell System Alarm Relay, circa 1960 - Connected to a telephone, this signal relay could extend typical ringtones. It amplified the volume of ringing, and distinctive tones could be created for incoming calls: chimes, horns, and vibrating bells. A system like this was useful in loud industrial settings and large spaces.
- circa 1960
- Collections - Artifact
Bell System Alarm Relay, circa 1960
Connected to a telephone, this signal relay could extend typical ringtones. It amplified the volume of ringing, and distinctive tones could be created for incoming calls: chimes, horns, and vibrating bells. A system like this was useful in loud industrial settings and large spaces.
- Fire Alarm Register - Beginning in the mid-19th century, cities installed telegraph fire alarm systems. When a fire broke out, a person could activate the nearest fire alarm box to send a signal directly to the fire department. The signal was received and recorded by a register like this one. It converted the signal's electrical pulses into punches on the paper tape.
- Collections - Artifact
Fire Alarm Register
Beginning in the mid-19th century, cities installed telegraph fire alarm systems. When a fire broke out, a person could activate the nearest fire alarm box to send a signal directly to the fire department. The signal was received and recorded by a register like this one. It converted the signal's electrical pulses into punches on the paper tape.
- Patent Model of Edison's Fire Alarm Telegraph, 1877 -
- 1877
- Collections - Artifact
Patent Model of Edison's Fire Alarm Telegraph, 1877