Hydrostat


Also found in: Dictionary, Medical, Wikipedia.
Related to Hydrostat: hygrostat

hydrostat

[′hī·drə‚stat]
(engineering)

Hydrostat

 

an underwater apparatus that is lowered on a cable from a support vessel in order to conduct underwater research and work. Hydrostats are chambers constructed from strong materials, such as aluminum-magnesium alloys and fiberglass-reinforced plastics. They are usually spherical or cylindrical and large enough to accommodate one to three operators. A hydrostat with a cylindrical chamber was first built by Hartmann (USA) in 1911.

Present-day hydrostats are equipped with systems for air regeneration, devices for underwater observation, lighting equipment, scientific research instruments, and motion picture cameras. Cables are used to provide electric power and telephone communication. Hydrostats assigned to underwater work such as raising sunken ships have devices that fasten onto the work object and manipulators that are controlled from inside the hydrostat (for example, the work chambers RK-680 [USSR] and Discoverer [USA]). Sometimes hydrostats are equipped with a propeller, in order to permit limited movement while the chamber is submerged. Hydrostats now in use for deep-sea research include GG-57 and the observation chamber NK-300 (USSR) and the observation chamber Galeazzi (Italy). The maximum depth of submersion for present-day hydrostats is 300 m. Large-scale development of hydrostats for depths greater than 300 m is not expected in the future, since the lowering on a cable from a surface vessel limits the range of a hydrostat’s use. Hydrostats are now universally being replaced by autonomous apparatus and equipment.

REFERENCE

Diomidov, M. N., and A. N. Dmitriev. Pokorenie glubin. Leningrad, 1964.

N. P. CHIKER

Mentioned in ?
References in periodicals archive ?
This mini hydrostat is the logical extension of the type VFG 425s-435s truck that was successfully launched on the market in 2008," said Marek Scheithauer, head of product management and product marketing for IC Trucks at Jungheinrich, adding that the proven concept in terms of the design, drive technology, ergonomics and safety features had all been retained.
FROST, GROSS, HYDROSTAT, INTROSPECT, JAROSITE, KEROSENE, LEPROSY, MOROSE, NEUROSIS, OLOROSO, PROSAIC, QUATROS.
This plasticity theory has a yield surface that is a paraboloid of revolution about the hydrostat with a planar cap on the normally open end.
And he notes that the muscular hydrostat idea has already reshaped physiologists' thinking about how the human heart expands after contraction.
The 2402R4-Stretch laboratory retort can process products being researched through rotary agitation and shaker agitation; and through steam, steam air, water immersion, water spray, hydrostat simulation, or sterilmatic simulation sterilization.
While we installed our hydrostat and later, our modular transmission in a gasoline-powered Tahoe, we did so at the express request of American auto companies.