Each instrument is provided with a keyboard, resembling that of a small piano, the key levers of which communicate with a circular row of vertical pins.
Per forating machines equipped with typewriter keyboards are used for the preparation of the messages, two or three keyboard perforators being employed at each end of the telegraph lines on which the Murray system is used.
Each channel consists of a keyboard and receiver both electrically connected to certain parts of the distributor.
Each receiver is provided with five electromagnets corresponding to the five keys of the keyboard, and the armatures of the electromagnets can thus repeat the various combinations for all the signals allocated to the different combinations of the keys.
When a combination of signals has been received and the armatures have taken up their respective positions corresponding to the transmitting keyboard, certain mechanism in the receiver translates the position of the five armatures into a mechanical movement which lifts the paper tape against a type-wheel and prints the corresponding letter.
In the Rowland multiple method of telegraphic working, the transmitter consists of a mechanical keyboard provided with a series of levers, which effect certain combinations of positive and negative currents for each letter.
Henri nodded, his fingers flying over the keyboard in front of him.
Rita Angeltoni, the token skirt, as she referred to herself, was usually there banging on her keyboard or answering the phone while keeping the quartet in line.
The signals must therefore be sent at regular intervals, and to ensure this being done correctly a telephone or time-tapper is provided at each keyboard to warn the operator of the correct moment to depress his keys.
The man in the white lab coat, Ully, jerked from his hunched position over a keyboard, and fear flashed in his eyes.
The Creed system is a development of the Morse-Wheatstone system, and provides a keyboard perforator which punches Morse letters or figures on a paper strip by depressing type writer keys.
The next morning, she went to the game room after her sparring session and sat the entire day, learning more and more about the game and experimenting with how the symbols on the keyboard interacted with the images before her.
"Isn't it fine, eh, Uncle Ignat?" said the boy, suddenly beginning to strike the keyboard with both hands.
At regular intervals a rotating arm on the distributor connects the five keys of each keyboard to line, thus passing the signals to the distant station, where they pass through the distributor and certain relays which repeat the currents corresponding to the depressed keys and actuate electromagnets in the receivers.