From the upper arms of a curved doublé lever C is suspended the pulley over which 

 the sounding wire passes; this pulley is hinged horizontally on the pin R to allovv it to follow 

 the even varving ansrle of the wire, and serving at the same time as reyolution-counter incli- 

 cating the depth. The curved lever C works on two fnlcrum-pins a a fixed in the sideframes, 

 the lower arms of the levers are connected together by a crosspiece K carrying the adjustable 

 1 Milis Z,, forming the one end of the brake belt M, the upper end of this brake belt is attached 

 to tin- sliding brake-block X, this too is adjustable by means of the screw with cross-handles 

 O working in plate P. 



The upper ends of the lever C are connected by the crosspiece /?, each end of which 

 rarrics a spiral spring E, the tension is adjustable by the milled nuts GG. 



The wire on its way between the pulley and the drum passes through a forked guide 

 (J. swivelling on the pin ó, this guide is worked by hand and enablès the wire to be wound 

 fair on the drum. 



For winding in the wire a hand-gear with doublé handles is fitted, this is uncoupled 

 when running the line out. 



Maiiipulatioii and working of the Machine. 



For sounding with this machine one man only is required. The winding in needs one 

 or two assistants. 



The lead is attached to the wire by means of a stray line of cord weighted at the top, 

 as is the case in all sounding machines in which steel wire is used. 



When the lead hangs free, the spiral springs E are extended and the lever C falls forward 

 until the lower end strikes against the stops, placed on the inside of the sideframes for this 

 purpose. As the lever falls forward, the brake belt is slackened off the wiredrum, except at the 

 point of the sliding block N. This is screwed tight when the machine is out of use. The 

 handgear being then also uncoupled. When preparing to sound, the sliding block is gradually 

 unscrewed until the lead begins to drop, the rate of descent being regulated by hand. 



As soon as the lead reaches the bottom, the strain on the rope decreases, allowing the 

 spiral springs to contract and raise the lever C, tighten the brake and automatically stopping 

 the drum. This being a sign that the lead has reached the bottom. 



The sliding-block is then screwed up tight and the amount of wire out read off. The 

 hand-gear is coupled in, the slicling-block released and the line wound in. 



One of the assistants works the guide Q and sees that the line is wound evenly on the 

 drum. When the stray line reaches the drum, the sliding-block is tightened, the hand-gear 

 uncoupled and the lead drawn in. 



Remarks on the sounding with the Lucas-machine. 



The line must not be allowed to run out too fast, two fathoms per second is a good 

 average speed. 



