30 



Popular Science Monthh) 



Strict accountability is enforced by the use of this machine 



Hearing Your Men at Work 



THE manager of a machine shop or 

 factory can know how much work 

 is being done at benches by mechanics 

 or by power-driven machines or tools 

 by means of microphones or telephone 

 transmitters connected with the working 

 apparatus. By becoming famihar with 

 the vibrations of the different machines 

 he can tell at any given moment just 

 how fast Pat is working the lathe, or 

 how industriously Mike is operating the 

 milling machine on one of his blue 

 Mondays. In addition to this he can 

 tell at a simple turn of the switch if tin- 

 machines are running at normal speed 

 and smoothly and properly, as they 

 should. 



Interchangeable Pressing and Steaming 

 Device for Tailors 



A RECENTLY patented ironing- 

 board for pressing and steaming 

 garments is composed of a receptacle 

 having a flange ii around its open top. 

 A hoop 13 presses U()war(i against llu- 

 gaskets 12 and downward against the 

 short arms of several eccentric levers 

 14. This is shown in Fig. z. Numerous 



recesses 16 in the sides of 

 the receptacle allow for the 

 movement of the levers. 



Two layers of fabric, the 

 upper one air-tight and the 

 lower one porous, are 

 stretched over the top of the 

 receptacle and secured under 

 the flange 1)\- means of the 

 hoop and gaskets. Within 

 the receptacle is a longitu- 

 dinally-placed conduit 19 

 having numerous openings. 

 At one end steam may be 

 admitted, and at the other 

 end, air. 



When pressing, air is ad- 

 mitted and its flow con- 

 trolled so that a slightly 

 rounded surface is obtained. 

 The main advantage lies in 

 the fact that shiny seams 

 are avoided. 



\\"hen steaming garments, 

 the upper air-tight fabric 

 should be removed. Steam 

 can then be admitted in- 

 stead of air. The porous 

 under layer allows the steam to pass 

 through and the rounded surface affords 

 very close contact for the garment, 

 insuring a thorough steaming. 



Shiny seams cannot result because the 

 pressure is evenly distributed 



