Catalogue
493 of 655 records previous / next
Grasshopper Send-Receive Morse Key, by Marconi Company, England, c. 1899
Inventory Number: 79280
Number of documents: 2
Document Type: Miscellaneous Note
Document Heading: Grasshopper Send-Receive Morse Key
Text:
The 'Grasshopper' Send-Receiver Morse Key, known as such because of its distinctive shape, was initially developed by Marconi around 1896. The Morse key acted as a 'send/receive' switch. The terminal at the rear of the ebonite rod was connected to the aerial by a flexible wire, and the screened terminal beneath it was connected to the receiver by a lead-covered wire. A spring kept the terminals' contacts together until the operator pulled the handle for transmitting, thereby disconnecting aerial and receiver - this disconnection being important to prevent damage to the receiver by the high powered transmitter pulses.
Document Type: Miscellaneous Note
Document Heading: Manufacturer Details
Text:
The Wireless Telegraph & Signal Company Limited was founded on 20 July 1897, operating from offices in the City of London and with Marconi as the chief shareholder. On 23 February 1900, the company was reconstituted under the name Marconi's Wireless Telegraph Co. Ltd.
493 of 655 records previous / next
Record mode: Basic | Medium Images | Large Images | Documents (2)