A shower fitting for a domestic installation comprises a shower head, which can be held in the hand, and which comprises inlet connections adapted to be connected by flexible conduit to supplies of hot and cold water. The shower head comprises a body, the interior of which is formed to provide a mixing chamber to which hot and cold water is delivered, and from which water flows to a spray outlet of the shower head. The temperature of the water flowing from the shower head is controlled by a ther...

Improved formwork elements for building purposes. The present invention relates in particular to improved interlocking formwork elements of hollow block configuration produced from a hard foam resin material, and adapted to be filled with concrete to provide a rigid wall or the like having high insulating properties.

A winch arrangement intended for the rapid shifting of aircraft or other wheeled vehicles which incorporate their own braking system and which may be under the control of an occupant during winching, is so constructed as to provide compensation for wide fluctuations in load on the winch due to a possible lack of coordination between operation of the winch drive and the control of the vehicle. The winched arrangement comprises a drive motor, a winch drum assembly coupled to the drive motor by mea...

A projectile has a primary penetration element arranged at the rear end, and surrounded by a substantially tube like secondary penetration element, so that in front of the primary penetration element is formed a cavity within the secondary penetration element. The cavity contains a bursting charge or bursting and incendiary charges, ignitable by means of an ignition charge arranged in the nose of the projectile upon impingement against a target. The construction is such that the primary penetrat...

A ratchet mechanism comprising a rotatable member incorporating a toothed periphery, the rotatable member being suitably mounted to allow free rotation thereof, a pawl incorporating apparatus for engaging the toothed periphery, the pawl being suitably mounted to permit movement thereof from a position in which the pawl allows said rotatable member to rotate freely in either direction of rotation to a position in which the pawl prevents said rotatable member from rotating in one direction, and se...

A water container (2) of a laundry machine has a helical path (24) in the base (20) thereof starting from a point adjacent to but above a drain inlet and progressing downwardly in the direction of motion of a spin tub (3) rotatable in the water container (2) towards the drain inlet (23).

A cantilever racking system comprises vertical pillars formed of two metal sections of steel strip rolled to a cross-section comprising a central web portion bounded by two channel portions. The web portions are secured in facing relationship so that the juxtaposed channel portions form T-shaped slots having inturned marginal edges. Cantilever arms may be clamped in place against the end surfaces defined by channel portions for example by bolts engaging captive nuts engaging with the inturned ed...

A rotary drill bit for use in drilling or coring holes in subsurface formations comprises a bit body having a shank for connection to a drill string, a plurality of cutter assemblies mounted at the surface of the bit body, and a passage in the bit body for supplying drilling fluid to the surface of the bit body for cooling and cleaning the cutter assemblies. At least some of the cutter assemblies each comprise a cutting element on a stud which is recveived in a socket in the bit body, the center...

A device for regulating the setting angle of a control surface such as a flap or rudder on an aircraft comprising an inflatable bag located between the control surface and the fuselage. Air for inflating the bag is drawn from outside the aircraft at a location where increased pressure due to dynamic pressure of the passing airstream is available. The control surface and the bag may be provided with coinciding openings therein, and a secondary flap is mounted on the control surface immediately be...

A flat sheet of expanded polystyrene is creased to provide a hinge between an insert to be placed between a patient's maxillary and mandibular teeth and a two-part flap, the outer part being swung upwardly before the patient's face so that his interpupillary line and midsagital plane can be marked thereon. With the sheet flattened, the midsagital plane location is also marked on the inner flap. The insert takes a permanent impression of the patient's cusps when the patient bites thereon. When th...