overall: 7 1/4 in x 15 1/4 in x 10 1/4 in; 18.415 cm x 38.735 cm x 26.035 cm
L. G. Tillotson and Company of New York made this telegraph register in 1851. It used a weight-driven tape drive. Telegraph registers are electrically-activated printers that receive Morse code messages. The message travels as a series of electrical pulses through a wire. The pulses energize the register’s electromagnets which move a lever-arm holding a pen or stylus. A clockwork mechanism pulls a strip of paper across the pen or stylus, recording the message. Short pulses draw or emboss a dot, slightly longer pulses a dash. The sequence of dots and dashes represent letters and numbers.