Page:Popular Science Monthly Volume 91.djvu/689

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Popular Science Monthly

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��Fastening Motors to Ceilings Without Scaffolding or Tackle

IT is hard to attach motors to ceilings or overhead beams in factory rooms. Here is a mechanism or de- vice which is said to do this with great ease. It is a portable elevator or tiering machine, and it is employed to elevate and hold the motor in position until it is fas- tened to the ceiling, thus eliminating scaffolding, tackle and hoisting ar- rangements. Four to six motors can be in- stalled in the time for- merly required for the mounting of one. Of course the machine can also be used for inspect- ing the motors, for tak- ing them down to be re- paired, for renewing pulleys, and for putting up shafting.

The machine itself consists essentially of an elevating platform with two uprights or guides and a revolving base with a ball-bearing center on which it swings like a turntable. The whole unit is mounted on a wheeled truck equipped with a floor lock. It was primarily designed for the piling or tiering of bales, cases, barrels, etc., in storerooms and warehouses, thus enabling the entire space up to the ceiling to be utilized. Two sets of elevating gears are provided.

���The Portable Elevator or Tiering Machine The machine was primarily designed for piling bales, cases, barrels, etc., in warehouses, so that space up to the ceiling could be utilized. Two sets of elevating gears are provided, one operating at high speed and handling loads up to 800 pounds, and the other at a lower rate of speed for handling from 800 to 1,800 pounds. It will elevate loads from six to twenty feet. The frame is hinged so that the top section can be folded over to facilitate the passage of the machine through doorways

��Looping the Loop in a Rocking Chair — for Exercise and Diversion

GLANCE at this rocking chair. Imagine yourself resting in it, strapped in, too, around chest and loins. It seems restful enough. But why the straps? Just for safety, friend. For this chair aspires to demonstrate perpetual motion, once it gets started. As you rock, it gathers momentum until finally — hold your breath — it turns you over and over and over like a cart-wheel.

The skeleton frame- work of the chair is composed of two ver- tical, parallel elliptical hoops fastened together by a number of hori- zontal tie-bars. To these tie-bar's the seat and back of the chair are attached, and also the straps which hold you while you are cart- wheeling. A bar at about shoulder-height acts as a hand-grasp.

You seat yourself in the chair, strap your- self in, grasp the hand- bar and give yourself a swing in the usual man- ner. You start off gently enough, but your progress depends upon your own physical exer- tion. Before you become seasick, it is best to reverse the direction of the motion and thus bring the chair to its normal oosi- tion, letting it gradually subside.

���You sit in this chair, strap yourself in, grasp the handle-bar and start rocking, turning cart-wheels, if you like and as long as you like. To bring the chair to a stop you reverse the motion

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