Rectangular wooden base with two metal strips on top of each other. Each strip is separated with a rectangular block between them at one end and has a terminal knob at that end. The other end of the top strip has a knob that when pressed produces a contact between the two strips. Engraved on top: 'GAMBRELL BROS & CO LTD / PATT. 5037'morse code switch, contact switch, gambrell bros, telegraphy

Morse key telegraphic printer, 250 ohm resistors inward and outward switch and teleprinter with tape reel to record messages spare wheel on wood base to collect and store full reels from teleprinter.flagstaff hill, warrnambool, shipwrecked-coast, flagstaff-hill, flagstaff-hill-maritime-museum, maritime-museum, shipwreck-coast, flagstaff-hill-maritime-village, morse key, teleprinter, telegraphic printer, codes, signals, communication, telegraphy

Olive drab metal case. Lunch box size. Contains ear piece on spiral cord and a bakelite morse code key. Lid lists antenna length and frequency channels. Base has switches, dials and battery.radio set an prc, sas

A telegraph key or Morse key is a specialised electrical switch used by a trained operator to transmit text messages in Morse code in a telegraphy system. Keys are used in all forms of electrical telegraph systems, including landline (also called wire) telegraphy and radio (also called wireless) telegraphy. An operator uses the telegraph key to send electrical pulses of two different lengths: short pulses, called dots or dits, and longer pulses, called dashes or dahs. These pulses encode the letters and other characters that spell out the message.Metal device with black knob mounted on a wooden base. A plaque with printed text is also attached to the base.Printed: GIVE A SERIES OF DASHES INSTEAD / OF A STEADY EXPOSURE WHEN CALL- / ING FOR LIGHT, OR SHOWING LIGHT. / USE THE PLUG IN No. 1 / SOCKET AS LONG AS THE / LIGHT IS GOOD ENOUGH. / THEN CHANGE TO No. 2 THIS WILL / LENGTHEN THE LIFE OF BOTH BULB / AND BATTERY.morse code, communication, telegraph key, messages, pulses