open the Door and Wind Up the Clock 



The swinging door compresses air which 

 operates a winding mechanism 



\ FREXCH inventor, Gustave Delan- 

 ^-\ noy, has devised an original scheme 

 for winding clocks by air-pressure ob- 

 tained by opening and closing of doors. A 

 small air pump arranged on or near 

 the door is operated by the 

 opening or closing of the lat 

 ter, and the air thus com- 

 pressed is led through a 

 thin metal tube to the 

 clock or clocks to be 

 wound. 



The air cylinder is 

 pivotally supported 

 by a bracket screwed 

 to the door frame. 

 The free end of the 

 piston rod is engaged 

 by a pin on the door. 

 Air drawn into the 

 cylinder during the 

 opening movement of 

 the door will be com- 

 pressed during the clos- 

 ing movement and ex- 

 pelled through a flexible 

 tube connection. 



The air pump is carried 

 on the wall at the side of 

 the door. The piston rod 

 is held stationary by a 

 bracket, v.hile the cylinder 

 is movable lengthwise of 

 the piston rod, by means 

 of a cord passing over a pulley and 

 attached to the door. By opening the door, 

 the air in the cylinder is compressed and 

 expelled through the hollow piston rod 



The compressed air from the 

 cylinder on the door raises the 

 piston which winds the clock 



into the tube. A cord attached to the left 

 end of the cylinder and winding on a 

 roller containing a coiled spring, will pull 

 the cylinder back during the closing of the 

 door, so as to keep the cord taut. 

 ^' e metal tube (of an inner 

 iameter of from 3/32 to 3^ 

 and of a length of over 

 one hundred yards) leads 

 along the walls, conform- 

 ing with their bends and 

 corners, to an air cylin- 

 der arranged prefer- 

 ably in the casing of 

 the clock tobe 

 wound. The com- 

 pressed air in the 

 tube will raise the 

 piston in this cylin- 

 der. This move- 

 ment will wind the 

 clock by means of 

 levers and the spring- 

 pressed pawl on the 

 levers which engages 

 with the ratchet wheel of 

 he clock spring. A valve 

 provided which will al- 

 low any excess pressure to 

 escape and which will also 

 be opened in case the 

 weight driving the clock 

 has reached its uppermost 

 position. Another weight 

 returns the piston in the cylinder to its 

 normal position. Instead of the cylinder, 

 bellows may, of course, be used which will 

 be lifted by the action of the compressed air 

 in the manner described and will perform 

 the same operations. A weight may also 

 be employed to pull the cylinder back, in- 

 stead of the roller and cord. 



A small air pump is operated by the opening 

 of the door and the compressed air is led to 

 the clock through a flexible tube connection 



Any Type of Fighting Craft Costs 

 a Fortune to Build 



A MODERN giant battle cruiser will cost 

 approximately S20,ooo,ooo; a super- 

 dreadnought can be built for Si8,ooo,ooo; 

 a scout cruiser for S6,ooo,ooo; a destroyer 

 for $1,300,000; while ordinary submarines 

 cost $600,000 each for the smaller type, 

 and from $1,000,000 to $1,200,000 each 

 for the larger boats. 



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