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electricity
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#10013: Wireless transformer, Type R, 0.5 kW
Thordarson Electric MFG Co., ca. 1910
These high-voltage transformers were commonly used in amateur spark stations. The primary is keyed via the AC line and the
secondary to the closed circuit with a charging condenser and a rotary spark gap. For a 0.5 kW transformer, the secondary voltage is
typically 12 kV. The sliding section moves a portion of the core in and out for adjusting the curren capability and resulting power output.
The Type R sold for $21 in 1917.
Reference:
Location:
IU tag number: 70-29-5343
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#10014: Wireless transformer, Type R, 1.0 kW
Thordarson Electric MFG Co., ca. 1910
see previuos entry.
Reference:
Location:
IU tag number: 70-29-5344
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#10015: Voltmeter
Weston Electrical Instrument Co. Newark, NJ
Model 155, no. 21992. Patented in 1895 - 1898
References:
Location:
IU tag number: 70-29-4615
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#10021: Resistor box
The Leeds and Northrup Co. Philadelphia
serial no. 12738.
References:
Location:
IU tag number: 70-29-9048
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#10022: Wattmeter
Weston Electrical Instrument Co. Newark, NJ
Weston Portable Wattmeter, no.1738. Maximum capacity 10 A, 1.5 kW. Patented in 1890 - 1898
References:
Location: SW102
IU tag number: none
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#10023: Galvanometer
Leeds & Northrup Co., Philadelphia, PA
Portable Galvanometermeter, no.643964.
References:
Location: SW102
IU tag number: 70-29-80063
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#10024: Voltmeter
Weston Electrical Instrument Co. Newark, NJ
Weston Portable Voltmeter, model 564, no.047958. In black plastic box 58mm x 95mm x 140mm
References:
Location: SW102
IU tag number: none
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