Electric headlamp comprised of a belt-worn rechargeable battery inside a red plastic case with metal lid, attached by a cord to a lamp which was affixed to the front of the helmet.
Context
The Koehler Manufacturing Company produced this battery-powered cap lamp during the first half of the 20th century. Inventor Grant Wheat designed this lamp, leading to this type of lamp being called a “Wheat Lamp.”
Collection
Coal Mining Tools, Fred Barkey Collection
Acquisition
Source (if not Accessioned)
Fred Barkey, Sandra Barkey
Made/Created
Manufacturer
Koehler Manufacturing Company
Inscription/Signature/Marks
Type
Embossing
Location
front of battery case
Transcription
LIQUID
<-------->
LEVEL
WHEAT
4 VOLT BATTERY U.S. PATENT NO. 3301713
DES. PATENT NO. 204798
(Koehler logo)
MARLBOROUGH, MASSACHUSETTS, U. S. A.
Type
Inscription
Location
metal lid of battery pack
Transcription
PERMISSIBLE
ELECTRIC CAP LAMP
APPROVAL 6D-36 ISSUED TO
KOEHLER MANUFACTURING CO.
CAUTION: User must not open headpiece
or battery housing
CERTIFIED
ELECTRIC CAP
LAMP
CANADA
EM&R
COAL MINES
NO.61L-2
