General Information

Serial #

J-6208

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

METAL CASING & PARTS/ SYNTHETIC CONTROLS, POWER CORD, PARTS

Dimensions

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

Length

29.0 cm

Width

24.2 cm

Height

6.9 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

Applied

Country

United States of America

State/Province

California

City

Belmont

Context

Country

Canada

State/Province

Ontario

Period

ca. 1973+

Canada

According to Ms. Vatcher-Ryan, in Canada Bell would provide teletypewriter so that deaf person with modem (such as Ms. Hebert) could communicate directly with others with same equipment. Originally this equipment was used by Ms. Hebert's mother, then by Ms. Vatcher-Ryan.

Function

Used with modified teletypewriter 2000.0169 to enable deaf and hard of hearing people to communicate using ordinary telephone lines. Modem converted TTY signals into tones that could be carried by voice band of telephone line (ref. 1).

Technical

Frequency shift acoustic coupler modem developed in 1963-1964 by Californians Robert Weitbrecht and James Marsters, both deaf or hard of hearing; it enabled two individuals to communicate using two teletypewriters. R.H. Weitbrecht Co. was founded in 1965 to manufacture modems. In 1967 it was replaced by Applied Communications Corp.

Area Notes

Unknown

Details

Markings

BLACK LETTERING ON FRONT READS "PHONETYPE/ U.S. PATENT NO. RE 27,595/ CANADIAN PATENT NO. 873,989/ APPLIED COMMUNICATIONS CORP./ BELMONT, CALIFORNIA"/ BLACK LETTERING ON FRONT FOR CONTROL FUNCTIONS/ GOLD LETTERING ON BLACK LABEL ON UNDERSIDE READING "MODEL TU-4 SERIAL J-6208"

Missing

APPEARS COMPLETE

Finish

TEXTURED BEIGE PAINTED CASING/ GOLD SYNTHETIC? COVERED FRONT PANEL/ BLACK SYNTHETIC PARTS/ GREY CORD

Decoration

N/A