Headset

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Ingenium, 1966.0600.001
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OBJECT TYPE: MAGNETIC
DATE: 1915
ARTIFACT NUMBER: 1966.0600.001

MANUFACTURER: Unknown
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: BAKELITE CASES & CAPS. MAGNET WIRE WOUND SOLENOIDS; MICA DIAPHRAGMS; BRASS DRIVE PINS. SILVER METAL FRAME HAS LEATHER SLEEVES OVERHEADBANDS. WIRES ARE FABRIC COVERED

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 23.0 cm
Width: 20.5 cm
Height: 9.0 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Communications
Category: Radio
Sub-Category: N/A

Manufacturer

AKA: Unknown
Country: Unknown
State/Province: Unknown
City: Unknown

Context

Country: North America
State/Province: Unknown
Period: THIS TYPE OF HEADSET PROBABLY USED C.1915-1930
Canada: Unknown
Function: TO CONVERT ALTERNATING CURRENT AUDIO FREQUENCIES TO SOUND
Technical: EXAMPLE OF EARPHONES EMPLOYING RADICALLY DIFFERENT OPERATING DESIGN. RATHER THAN A PAIR OF SOLENOIDS ENERGIZING A MAGNETIC CORE, WHICH IN TURN ACTIVATED A METAL DIAPHRAGM THESE UNITS MOVE AN ARMATURE CENTRED IN A SOLENOID. ENERGY IS TRANSMITTED TO A MICA DIAPHRAGM VIA A PIN CONNECTED TO THE ARMATURE AT ONE END, AND THE CENTRE OF THE MICA DIAPHRAGM AT THE OTHER. BOTH THESE AND REGULAR EARPHONES HAVE POLARIZING PERMANENT MAGNETS.
Area Notes: Unknown

Details

Markings: FOLLOWING INFO. STAMPED INTO BACK OF EACH EARPHONES CASING: 'PAT. MAY 10, 1910/ PAT. SEPT. 14, 1915' 'Can Pat/ Aug 1, 1916' CRUDELY SCRATCHED, ABOVE
Missing: PART OF ONE CAP BROKEN & MISSING; ONE CONNECTING PIN MISSING
Finish: EARPHONE CASINGS HAVE SMOOTH, BLACK BAKELITE FINISH. MEDIUM BROWN LEATHER HEADBANDS. BROWN WOVEN FABRIC COVERING OVER CORDS
Decoration: N/A

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Unknown Manufacturer, Headset, after 1915, Artifact no. 1966.0600, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingenium.ca/en/id/1966.0600.001/

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