Finding the exact location of a waterpipe between two buildings by means of a telepipe. The 

 electric current is supplied by four dry batteries. The humming of the vibrator is the guide 



You Can't See a Pipe Underground, 

 But You Can Hear It 



WHAT is a "telepipe?" It is an electri- 

 cal device that tells you the location 

 of a buried waterpipe, so that no time is 

 wasted in digging over a large area to find 

 it. The instrument is used for locating 

 conduits, cables, I-beams and similar 

 buried objects that are not more than 

 twelve feet below the surface. The photo- 

 graph shows clearly how it is operated. 



The problem was to find the exact location 

 of the waterpipe between the residence and 

 the factory. This was done by attaching 

 the terminals of the telep 

 to the faucets in front of each 

 building. This done, the opera 

 tor with his portable Outfit 

 known as the exploring coil, 

 moved slowly over the i 

 known to contain the p 

 listening with the receiver 

 the instrument to his 



The hamming tone 

 the vibrator was his 

 guide. It was heard 

 all through the area 

 enclosed by the pipes 

 in the circuit, except 

 in one spot, which 

 was directly above 

 the buried pipe. 



The current for the 

 instrument is supplied 

 by four dry batteries, 

 and the entire outfit is 

 easily carried. It weig 

 about twenty pounds. 



Its principal advantage 

 lies in the fact that it is 

 very quickly and easily ap- 

 plied and operated, one man 

 being capable of using it alone. When an 

 underground break has occurred and the 

 cellar is in danger of being flooded this 

 feature wiU be appreciated. 



The air was supplied to this 

 emergency diver's helmet through 

 an ordinary automobile pump 



Making a Diving Helmet Out of a 

 Kitchen Boiler 



OUT of an ordinary kitchen boiler a 

 Brooklyn engineer has devised a 

 diving helmet which compares favorably 

 with the expensive diver's suit. He took 

 one end of a kitchen boiler and notched it 

 to fit the shoulders. Chains were placed 

 on it to give weight, as shown. With this 

 rig and supplied with air by an ordinary 

 duplex automobile pump, he stayed down 

 fifteen minutes at a depth of thirty feet and 

 completed important emergency work. 

 There was no window in this boiler 

 helmet. In a later one, however, 

 1 oblong glass paperweight 

 cemented to a hole cut in the 

 front of the helmet served 

 as a window. With this 

 rig and a regular deep- 

 sea pump J. J. Grafflin, 

 who devised the appa- 

 ratus, remained under 

 water nearly two hours 

 at one time. 



Before Mr. Grafflin 

 hit upon the boiler 

 helmet idea he knock- 

 ed one head from an 

 empty beer keg and 

 made a diving hel- 

 met out of it. To 

 steady the keg and 

 overcome its buoy- 

 ancy when submerged, 

 a man stood on top, 

 holding to a strip of wood 

 that was nailed to the keg. 

 With this rough outfit a 

 man was able to stay down 

 nearly two minutes at a 

 time. The beer keg led 

 Mr. Grafflin to adopt the kitchen boiler as 

 an efficient diving helmet. Evidently he 

 is a firm believer in the old axiom " Where 

 there's a will there's a way." 



