Key, telegraph
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1975.0496.001
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- OBJECT TYPE
- WIRELESS/OPEN CIRCUIT/LEGLESS
- DATE
- 1920–1940
- ARTIFACT NUMBER
- 1975.0496.001
- MANUFACTURER
- B.I. & H.C. Ltd.
- MODEL
- Unknown
- LOCATION
- Unknown
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- BRASS BASE, 'CIRCUIT CLOSER' LEVER & ADJUSTMENT SCREWS/ NICKEL PLATED STEEL KEY LEVER & BINDING POSTS/ NICKEL PLATED COPPER STRIP/ EBONITE OPERATING DISC, LEVER KNOB & BASE/ BAKELITEMOUNTING BASE
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 11.0 cm
- Width
- 8.0 cm
- Height
- N/A
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Communications
- Category
- Telegraphy
- Sub-Category
- N/A
Manufacturer
- AKA
- BI&HC
- Country
- Unknown
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- North America
- State/Province
- Unknown
- Period
- CIRCA 1920
- Canada
-
USED IN CANADA - Function
-
A SWITCH FOR EASE OF OPERATION BY HAND TO CAUSE THE INTERRUPTION OF THE FLOW OF AN ELECTRICAL CURRENT, IN THE TRANSMISSION OF A TELEGRAPH SIGNAL. - Technical
-
ELIMINATED BATTERY WASTE WHEN TRANSMISSIONS WERE NOT BEING MADE, WITHOUT CLOSING INCOMING MESSAGE TRANSFERENCE BY MEANS OF A 'CIRCUIT CLOSER' LEVER. - Area Notes
-
Unknown
Details
- Markings
- ON LEFT SIDE ON BASE: 'B.1. & H.C. LTD' INCISED.
- Missing
- N/A
- Finish
- NICKEL PLATED STEEL/ NICKEL PLATED COPPER.
- Decoration
- BEVELLED BASE EDGES.
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
B.I. & H.C. Ltd., Key, telegraph, circa 1920–1940, Artifact no. 1975.0496, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1975.0496.001/
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