Microphone
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1978.0521.001
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- OBJECT TYPE
- CRYSTAL/HAND HELD
- DATE
- 1933–1935
- ARTIFACT NUMBER
- 1978.0521.001
- MANUFACTURER
- Brush Crystal Products
- MODEL
- Unknown
- LOCATION
- Toronto, Ontario, Canada
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- MACHINED BRASS CASE, ALUMINUM DIAPHRAGM ATTACHED TO A PIEZOELECTRIC CRYSTAL ASSEMBLY. DIAPHRAGM OPENING IS PROTECTED WITH A WOVEN WIRE SCREEN WITH A FABRIC WIND SCREEN BEHIND THE WIRE SCREEN. A MICROPHONE CORD IS ATTACHED.
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- N/A
- Width
- 7.5 cm
- Height
- 3.5 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Communications
- Category
- Sound
- Sub-Category
- N/A
Manufacturer
- AKA
- Brush
- Country
- Canada
- State/Province
- Ontario
- City
- Toronto
Context
- Country
- North America
- State/Province
- Unknown
- Period
- 1935-1960
- Canada
-
MANUFACTURED IN CANADA - Function
-
TO PICK UP SOUND, VOICE, AND CONVERT TO COMPLEX ALTERNATING CURRENT. THE ELECTRIC CURRENT WOULD BE AMPLIFIED TO MODULATE A RADIO TRANSMITTER. - Technical
-
BRUSH CORPORATION DEVELOPED THE CRYSTAL MICROPHONE AND THIS MICROPHONE IS ONE OF THEIR VERY EARLY MODELS. - Area Notes
-
Unknown
Details
- Markings
- MFG'S PLATE: 'BrushCrystal Products/ TORONTO CANADA/ MODEL FRQUENCY SERIAL/ H.E.P.C./ 4377/ VOLTS/ WATTS'/ STAMPED ON FRONT: 'BRUSH CRYSTAL/ TORONTO/ PRODUCTS'
- Missing
- MICROPHONE CONNECTOR
- Finish
- CHROME PLATED. HANDLE IS WRAPPED WITH ELECTRICIANS TAPE
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Brush Crystal Products, Microphone, between 1933–1935, Artifact no. 1978.0521, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1978.0521.001/
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