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1922 __ Ossiphone
Comment : “Radio for the Deaf.A year or two ago an instrument was developed in England which is now arousing wide interest. The inventor is Mr. S. G. Brown, of London, and the invention is known as the ossiphone derived from the Latin "os" or "ossis," a bone, and the Greek "phone," meaning sound. It is no less, as its name implies, than a device which enables one to bear through one's bones. [...] The ossiphone is quite small and can be carried in the waistcoat pocket. It comprises a little ebonite case containing an electromagnet of the horseshoe pattern, between the poles of which an iron bar is fitted that can be made to vibrate. The electromagnet is energized by current from the telephone batteries when used as a receiver in radio or wire telephony, or from dry cells in the aural box when employed for carrying on an ordinary conversation between persons in the same room. The aural box and ossiphone together are used to take the place of the ear appliances commonly used by deaf persons. The former is a metal horn, in appearance like a loud speaker, with a microphone at the lower end. Connections between the ossiphone and aural box or telephone are made by means of small plugs and sockets to which ordinary flexible cord is attached. Dry cells in the aural box provide electric current for the microphone. In order to carry on a conversation over the telephone, a small socket is wired in parallel with the ordinary receiver and, for the sake of convenience, is secured to the outside of the telephone box. There is a similar socket on the ossiphone, with a length of flexible cord having a twin plug at each end connecting the two. The vibrator bar, which projects outside the ossiphone case, has a small ebonite button screwed to the end of it. The case is held in one hand and the button is pressed gently but firmly against the finger knuckle. By this means, the vibrations of a person's voice at the other end of the line are conveyed through the body to the aural nerves, and so to the brain, where the sensation of sound is produced independently of the outer ear. This may be proved by stopping the ears effectually, or by putting the ordinary telephone receiver temporarily out of commission. In this way it is possible actually to hear more clearly than with the ordinary receiver, although incidentally the ossiphone constitutes an excellent duplicate receiver.”. (P.J. Risdon, In“RADIO BROADCAST”, Vol. 2, NOVEMBER, 1922, to APRIL, 1923, Garden City, N. Y., DOUBLEDAY, PAGE & COMPANY, 1923, pp. 63-64)
Urls : http://www.archive.org/stream/radiobroadcast02gardrich/%23page/62/mode/2up (last visited )

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