From rjaquiss at earthlink.net Fri Nov 2 14:11:18 2018 From: rjaquiss at earthlink.net (rjaquiss) Date: Fri, 2 Nov 2018 08:11:18 -0600 Subject: [Nfb-history] FW: Posts from Fred's Head from APH for 11/01/2018 In-Reply-To: <0d9bb2b66f092e599244d8765.60d5a56a21.20181102130534.4bf0215c30.95b814a4@mail254.suw101.mcdlv.net> References: <0d9bb2b66f092e599244d8765.60d5a56a21.20181102130534.4bf0215c30.95b814a4@mail254.suw101.mcdlv.net> Message-ID: <002401d472b5$ed3b4ac0$c7b1e040$@earthlink.net> 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. View this email in your browser Fred's Head logo 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 Throwback Thursday: U.S. Signal Corps Sensory Aid By APH Blogger on Nov 01, 2018 12:03 pm 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. Read in browser ? share on Twitter Like Throwback Thursday: U.S. Signal Corps Sensory Aid on Facebook Recent Articles: Have you met the littlest pumpkin in the pumpkin patch? Throwback Thursday: Frank Hall's Greatest Invention My Guide Dog Story Throwback Thursday: On the road Copyright ? 2018 The American Printing House for the Blind, All rights reserved. You are receiving this email because you subscribed to posts via email at http://www.fredshead.info/. Our mailing address is: The American Printing House for the Blind 1839 Frankfort Avenue Louisville, KY 40206 Add us to your address book unsubscribe from this list update subscription preferences Email Marketing Powered by Mailchimp -------------- next part -------------- An HTML attachment was scrubbed... URL: