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The Optical Magic Lantern Journal and Photographic Enlarger. 157
the acrobat or tumbler who turns the somersaults, itis by far the more important of the two.
The parts of the tumbler—his body, arms, and legs—are cut out of thin metal, say brass or tin. shown in Fig. III.
up at right angles to the body, and serve to keep the arms and legs from falling too far and assuming impossible attitudes. Their positions
Fig. III. To the centre of the acrobat’s body is
fixed a small wheel, sp, Figs. II. and III. A block F, about the same size as the wheel, is This
glued to the interior surface of the glass.
The shapes of these parts are clearly | Upon the body are left small : tongues or projections of metal, which are bent |
framework, in the groove prepared for it, and the string that is stretched between the two blocks J, J, Fig. 1V. (and which is left sufficiently slack for the purpose), is wound once round the wheel on the acrobat’s body.
Two blocks &, z (Fig. IV.) serve to limit the play of the sliding glass.
The slide is now ready for exhibition in the optical lantern. The sliding glass must be pulled out before the slide itself is inserted in
min ' the lantern, and the tumbler will then be seen are indicated by the dotted lines,.L, m, N, 0,
sianding behind the other, who is stooping, in a position ready to make his leap into the air. The sliding glass is now pushed in as far as it will go. This will cause the tumbler to be turned completely over twice in rapid succession,
block answers as a support on which the |
acrobat revolves, turning on the screw a, passing through the wheel 8, and fixed to the block r.
It will, of course, be understood that the limbs of the tumbler are pivoted in their respective positions to his body, and are kept from touching each other by ineans of small washers. separates the two arms, and one the two legs.
The tongues, Lt, M, N, o (Fig. III.), must be sufficiently long to keep both pairs of limbs from falling too much out of place.
It will hardly be necessary to remark that Fig. II. is a side or end view of the movable glass, with the acrobat mounted upon it.
The movable glass is now inserted in the
~~, Se
To be perfectly plain, one washer |
and he will land upon the other side of the stooping acrobat. It would be rather superfluous to explain in
' many words how the tumbler is made to turn
over. The drawings and previous statements must have made that perfectly clear. It will therefore be sufficient to say that as the sliding glass is pushed in, tne wheel fastened to the tumbler runs along the string and so causes the double revolution of the acrobat. By stopping the glass half-way the effect of one tumbler alighting on the other’s back may be obtained, but care must be taken to regulate the distance properly, or the absurd and impossible effect of @ man remaining in wnid-air, with absolutely no support of any kind, will be the result.