A team at Disney Research recently developed some moderately astonishing technology that let you transmit soundthrough your fingertips . Some cunning inventor right smart back in the 1920s had a similar ( if in spades more primitive ) parlor conjuration . They called it the Talking Glove .
https://gizmodo.com/incredible-disney-microphone-transmit-sounds-through-yo-1277291096
All you needed to make this wizard mitt contraption was a few batteries , some wire , two metal rods , aninduction coil , a leather glove ( course ) and a mike or phonograph .
The February 1923 outlet of Practical Electrics mag included a covering with this “ talking glove ” and even included operating instructions for how to build it . I ’ve admit a canned version of the article below . If you determine to work up your own , please send me a video ! I ’m curious to see how well this would lick with a few mod twenty-four hours pinch .
This is an experimentation which the author perform some long time ago , and is now wreak back to liveliness with some little variation . It is an interesting demonstration that can be produced by any one , and the convenience necessary are unproblematic .
We first call for a secure mike , which , however , can be nursing home - made . Some one of t h e mike describe in the columns of this journal can be employed with secure consequence . We also expect a elementary battery ( A ) , which may consist of either a few wry cells or a 4 to 6 - volt depot battery . Next we have a Dame Muriel Spark or induction coil ( SC ) . This coil may be a Muriel Sarah Spark coil coiffe as is used on a Ford railcar , or otherwise a good telephone evocation coil , without any vibrator . If a glint coil with a vibrator is used , it is necessary that the adjusting screw be screwed tightly against the springiness , so that it will not move .
Next we have a high tension battery ( B ) which is the usual radio set “ B ” electric battery , and may be bought at any radio store . A voltage of 24 will answer , as a principle . If skilful results are not hold with 24 volt , another 24 - volt battery may be added in series . It is advisable to get a “ B ” battery with connectedness brought out , so that voltage can be varied . In this experiment the potential difference required is often quite crucial , and a edition of a few volts will make a large difference . We also require metallic handles , such a s used on electric scandalous setup ( H and H1 ) . A metallic screw driver or even a piece of forest , overcompensate with tinfoil , to which a flexible conducting wire is connect will do very nicely .
If all the connections are made , an help now speaks into the mike ( M ) . While one person holds in one hand one metallic handle , the other helping hand , covered by a kid baseball mitt , is held against the ear of a 2nd someone , who moderate the other end in one bridge player . The baseball glove will then talk distinctly and quite loudly . It is quite necessary that the glove in question be a kid leather baseball mitt . A cot- ton mitt , or one of the soft leather variety show , known as buckskin or chamois , will not work on . The tenuous the leather of the glove , the better the resultant . Note particularly that the baseball glove must be perfectly ironic . If it is moist or sozzled , a pathetic outcome will follow . Drying the baseball glove over a stove or radiator before using it will better the quality of the rendition .
There is a little trick in connection with this that is important . When holding the boxing glove against the ear of the listening per- son , site the palm of the hand near the radiocarpal joint against the cheek ivory . This will impart the palm of the gloved manus over the ear . Do not relate that part to the ear of the second person . The theme is that the stretched mitt over the palm will vibrate and the quivering should not be impaired . you could easily demonstrate this to your own atonement by contract the glove tightly to the ear of the listener . He or she will scarcely be able-bodied to get word anything . But the jiffy the glove is removed , slightly , from the ear , the results will become astonishing . Always think that the carpus of the gloved hired man must actually make link with the impudence off-white of the face of the hearer . If no liaison is established , the gadget does not operate , for the following reasons :
The Talking Glove is a variety of talking condenser . By studying t e circuit it will be note that the current from the high tension battery flows first through the secondary of the coil , then through the body of the wheeler dealer , thence to the boxing glove . The handwriting inside the glove is one plate of the condenser — the glove is the dielectric — the face , or cheek osseous tissue , of the listener is the other plateful . The return electrical circuit is completed through the listener ’s body into the “ B ” battery . It will be celebrate that the optical condenser is keep charge continuously through the mellow tenseness “ B ” battery , whether an manipulator verbalise into the microphone ( M ) or not . Note also that the polarity of the “ B ” battery is of import . It will puzzle out much advantageously if the connexion are made in one room than in another . The correct connection has to be found by literal experiment .
In our cover innovation we have evince how phonograph medicine can be transmit through the Talking Glove . In this shell a mike button is impound to the tone arm of the phonograph , and the phonograph can then be shut so that little medicine issues from it . Or the record player may be in another room where the experimentation is made . This will mystify the listeners still more . A microphone for phonographs has been described by the writer on Sir Frederick Handley Page 354 of the July 1922 , issue of Practical Electrics .
A good stiff man of writing report will do evenly well . In this case the writing paper is placed over the ear , while the wheeler dealer cup his manus on top of the newspaper . After a few trials , for get the necessary tensity and pressure , it will address aloud and distinctly .
The experimentation of the sing Glove can be varied somewhat by using two operator , each with a glove in his hand . Each should take hold of the metal grip . Then if the two manipulator rank their two gloved hands over both ear of the listener the sounds will be plainly get wind .
For parlor tricks or amusement purposes , another variation can be made by having the two operators step , each with one foot , upon a contact home , the bottom of the shoe colloidal suspension being pierced by nails , while the interior of the horseshoe is covered with tinfoil or other metallic home plate . It is necessary that no socks be outwear , or maw may be cut in them for the understructure to connect with the plate . In this grammatical case there will then be no visible wire or connexion to the two operators , to the mystification of the listener . The mitt may be give about for examination and put on or taken off properly in the mien of the hearing .
Images : scan from the February 1923 issue of hardheaded Electrics
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