GB190625916A - Improvements in Devices for Regulating the Position or Depth of the Immersion of Submarine Mines, Parts of Mines, Buoys, or any other Floating Bodies whose Depth of Immersion it may be desired to Change or Regulate, such as Lights Beacons or other Seamarks. - Google Patents

Abstract

25,916. Leon, K. O. Nov. 16. Buoys.-Relates to means for maintaining a submarine mine, submerged buoy, or the like at a constant depth below the surface in a tideway, and is described with reference to a contact-mine having an anchored main body a, Fig. 1, containing the explosive charge and detonator, and a contact buoy f, Fig. 2, containing the device for closing the firing circuit when the buoy f is struck by a passing vessel. The mine a and buoy f are connected by a cable h wound on to a drum d in the mine a. The drum is rotated to wind or unwind the cable, and so to lower or raise the buoy f, by a motor b supplied with current from a battery on shore. The circuit is closed, so as to drive the motor in the required direction, through pivoted spring contact-arms 19, 20, Fig. 3, and fixed contacts 21, 22, 23, located in a box 15, when the diaphragm 16 closing the bottom of the box, or other device affected by the external water pressure and controlling the contact-arms 19, 20, is moved from its normal position by an increase or decrease in the water pressure due to the state of the tide. An electro-magnetic device, controlled from the shore, is also provided for actuating the contact-arms 19, 20 when it is desired to lower the buoy to allow a friendly vessel to pass.