[Nfb-history] FW: Posts from Fred's Head from APH for 11/01/2018

[rjaquiss]

Hello:

 

     I thought this would be of interest.

 

Regards,

 

Robert

 

 

From: Fred's Head from APH [mailto:fredshead at aph.org] 
Sent: Friday, November 02, 2018 7:06 AM
To: =?utf-8?Q??=
Subject: Posts from Fred's Head from APH for 11/01/2018

 






The latest blog posts from Fred's Head from APH, a Blindness Blog. 


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Updates from http://www.fredshead.info/ 


Fred’s Head from APH, a Blindness Blog




In the 11/01/2018 edition:



*	Throwback Thursday: U.S. Signal Corps Sensory Aid

 




 <https://aph.us8.list-manage.com/track/click?u=0d9bb2b66f092e599244d8765&id=d5c2502274&e=60d5a56a21> Throwback Thursday: U.S. Signal Corps Sensory Aid


By APH Blogger on Nov 01, 2018 12:03 pm


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The Signal Corp Sensory Aid is a black metal 
box about nine by nine by three inches, with two
 lenses on the front and a curved handle on top.

One of the more interesting stories that we tell is how military technologies like sonar and radar began to be applied to blindness after World War II.

This is a pioneering electronic obstacle detector, designed by Lawrence Cranberg at the U.S. Army Signal Corp Engineering Lab in 1943.  Twenty-five experimental units were manufactured by RCA, and in 1950, Haverford College was contracted to field test them by the Veterans Administration.  That study led directly to the development of more advanced models including the space age Laser Cane.

Cranberg's device sent out a beam of light, which, when reflected off an obstacle or object, was detected by the machine.  A vibrating button in the handle would suggest the distance from the object by changing its frequency.  This and many other travel aids are part of our AER Warren Bledsoe Orientation and Mobility Archives Collection.

 

 

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