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A heliograph is a device for sending messages or signaling by flashing the sun's rays from a mirror.
The heliograph was standard issue for the British and Australian armies until the 1960s. I'm looking for a new mirror for my heliograph. There were many heliograph types. The heliograph had many great advantages.
The heliograph was invented in the 1860s by French scientist and engineer, Alphonse Berget. It was used as a form of long-distance communication by reflecting sunlight with a mirror to send messages by Morse code.
A heliograph uses a mirror to reflect sunlight to a distant observer. By moving the mirror, flashes of light can be used to send Morse code. The heliograph was a simple but highly effective instrument for instantaneous optical communication over 80km or more in the 19th century.
look! i just made a heliograph!
The Heliograph was invented by French physicist and inventor Claude Chappe in the late 18th century. It used a system of moving arms and pivots to relay messages over long distances by reflecting sunlight. The Heliograph was used as a form of optical telegraphy before the invention of the electric telegraph.
An electrical breaker is a safety device used to open a circuit that has an electrical fault on it.
An airlock device is used for a container that holds gas. This device allows for the gasses to pass our of a container and not into a gas container. It is a safety mechanism and is used mostly on gas containers.
The captain of the ship used the heliographic light to signal the people in the sailboat.
An electrical safety device that can be reset and used again fits the description of an electrical circuit breaker.
There are certain areas of technology that might be associated with a safety device. Some of them include nuclear technology, radio technology and s many more.
The purpose of a safety device is to reduce the danger of injury.