| Show I Photo Cell Cell to-Cell Enables Blind to Operate Machinery Safely Important new mechanical devices devices devices de de- de- de vices to simplify life for returning servicemen who have lost their sight and for the upwards of civIlian civilian civil civIl- ian blind in the United States are announced by the American Foundation Foundation Foun Foun- dation for the thc Blind Chief of ot these devices in view of its wide application to the employment employment employment em em- of ot blind people is a new use for tor the versatile photo-electric photo celL The foundation has adapted the electric eye principle to make completely safe the operation by blind people of electric sewing sowing machines machines ma ma- chines in workshops and in their homes In practice this device puts a safety curtain of light around the rapidly plunging needle The moment moment moment mo mo- mo- mo ment the fingers of the blind operator operator opera opera- tor reach dangerously near the needles needle's point and come within the thc light circle the thc machine stops in a split second Another useful invention which willaid willaid will willaid aid sightless people in business is called the bill detector This gadget gadget gadget gad gad- get also utilizes the electric eye principle and was first thought of ot otI by a sightless Canadian Geor George e A. A I g A k Li jt It 4 I. I J a The magic eye a photo electric cell stops the thc needle of ot the power sewing machine as soon as the operators operator's operators operator's op op- op- op fingers come within the circle of light With this attachment blind persons may safely use many kinds of machines Lafleur of Overbrook Ontario In Inthis Inthis this contrivance a beam of ot light scans the numerals of paper currency currency currency cur cur- rency and the number of ot times the light is reflected from the bill is indicated indi lath by a buzzing noise The number number num num- ber her of audible sounds indicates the denomination of the bill Already in limited use by sightless workers is the audio This Thi enables them to weigh certain objects objects objects ob ob- ob- ob by sound rather than by touch Here a flashing light is registered registered registered regis regis- by a photo-electric photo cell If It the scale registers overweight the sightless operator hears a sound of ot high pitch if underweight a sound of low pitch and i if in balance no sound at all This idea too first came to a blind person Mrs Evelyn Watson of Buffalo In war plants this scale audio has such uses as weighing out specific amounts of powder for fuses mica for radio mechanisms and uniform buttons |
