General Information

Serial #

N/A

Part Number

3

Total Parts

4

AKA

N/A

Patents

N/A

General Description

DRY CELL BATTERY; PAPER WRAPPER

Dimensions

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

Length

10.0 cm

Width

5.5 cm

Height

3.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Medical Technology

Category

Assistive technologies

Sub-Category

N/A

Manufacturer

AKA

STOLZ

Country

United States of America

State/Province

Illinois

City

Chicago

Context

Country

Canada

State/Province

Ontario

Period

PROBABLY USED C. 1930S-1940S

Canada

Unknown

Function

TO AMPLIFY SOUND, FOR USE BY DEAF & HARD OF HEARING.

Technical

EXAMPLE OF EARLY ELECTRIC HEARING AID. POWERED BY A DRY CELL BATTERY, WHICH WOULD BE HELD IN A BREAST POCKET OR LAID ON A TABLE, SOUND WAS TRANSMITTED VIA THE CARBON MICROPHONE (PROBABLY SUSPENDED AROUND THE NECK) & AMPLIFIED BY THE EARPIECE TO BE HELD FIRMLY AGAINST THE EAR. LESS OBTRUSIVE THAN AN EAR TRUMPET.

Area Notes

Unknown

Details

Markings

BATTERY CASING BEARS FOLLOWING TEXT: [FRONT] 'THE STOLZ/ ELECTROPHONE/ Patented Feb. 2, 1909/ The Stolz Electrophone Co./ (Inc.)/ 92-96 STATE ST./ CHICAGO./ FOREIGN BRANCH/ 82-85 FLEET ST./ LONDON, ENG.'; [BACK] 'IF this battery is alternated/ twice a week with the/ other one that we give with/ the Electrophone, they will/ both last much longer, as/ they have a chance to rest/ and recuperate. Don't for-/get to turn "off" the cur-/rent when electrophone is/ not in use./ ‘Always buy two batteries at/ a time. The price for 2 sets/ by prepaid mail is 60 cents.'/ ‘128' STAMPED IN RED INK ON BOTTOM OF BATTERY.

Missing

N/A

Finish

BLACK

Decoration

N/A