Sinker and valved tube with detaching appliance, for pianoforte wire sounding machine, c.1873. Sinker and valved tube with detaching appliance 1870-1876
Baillie weight-detaching appliance; designed by Navigating Lieut. C. W. Baillie and used on H.M.S. Challenger Weight-detaching depth sounder, 1867-1873 1873
Detaching-weight sounder, single-hook model, designed by Ensign Brooke of the US Navy, USA, 1852-1860. Detaching-weight sounder designed by Ensign Brooke 1852-1860
Detaching-weight sounder, possibly later form, designed by Ensign Brooke of the US Navy, USA, about 1856. Detaching-weight sounder, or ‘Brooke’s Rod’, designed by Ensign Brooke c.1856