There is provided a drop counting chamber for use in infusion devices which provides a hermetic closure between the infusion liquid and the syringe needle when in storage, and which can easily be actuated. The device prevents entrance of any air bubbles into the infusion liquid.

An inductive device composed of a bead (10) of magnetic material, such as ferrite, has an aperture through which an electrical conductor (13) is adapted to pass and a reset winding (14) wound thereon and connected to a source of constant current. The constant reset current resets the bead of magnetic material so that the maximum volt-second absorbtion capability of the bead is available for preventing destructively high current spikes from flowing through the electrical conductor. The inductive ...

A scale device is provided, which can be used in the floor of a truck, trailer or fixed structure, in which it is desired to obtain the weights of various items placed on the floor, and includes one or more retractible pneumatic scale assemblies to selectively engage the items and record their weight, and which includes load responsive members to weigh the items.

The recording device is embodied as a stop watch 10 comprising a watch body 11 having a two-piece strap to secure the stop watch 10 to one hand 20 of its user. On one side, the watch body 11 has a display face 13 and an elongate button 16 for controlling the functioning of the watch 10 and the display on the display face 13. A central region 26 of the watch body 11 is flexible enabling the watch body 11 to be bent in a U or J shape around the hand 20 between forefinger 28 and thumb 27, the two p...

A high modulus endoprosthetic device comprising a polyaryletherketone and optionally reinforcement which may be fibrous, particulate or relatively massive. Loss of reinforcement to the body tissues may be reduced by provision of polymer rich layer at the surface of the device, particularly in locations where reinforcement is exposed at the surface or is likely to be exposed due to tissue or other abrasion.

The interior of a rheostatic device, such as a throttle-valve position potiometer having a rotor with sliding spring contact and a housing exposing at least one end of the rotor for operation, is sealed off against environmental effects by at least two hollow cylindrical rotor walls which are located concentrically within each other and extend towards a lid attached to a bottom part of the housing and at least two hollow cylindrical walls of said lid which are concentrically disposed within each...

Apparatus for e.g. igniting a boost motor of a spinning projectile comprises an inertia wheel (5) which remains stationary within the spinning projectile and a linearly movable member (10) initially decoupled from the inertia wheel but become engaged therewith when a predetermined linear acceleration state of the projectile is attained and which then initiates winding up of a flexible tape coupled to a switch mechanism. When the tape has been fully wound up, i.e. when the missile has spun throug...

An electronic device is located within a carrier. The carrier comprises a body portion and attachment portion whereby the body portion can be attached to an object to be identified. A flexible coupling portion couples the attachment portion with the body portion. The body portion is formed in two sections which are fastened together forming a cavity in which the electronic device is located.

A semiconductor device incorporating two superlattices in the GaAs/AlGaAs system separated by a relatively thick layer of GaAlAs is described. The device displays negative differential conductance.

A gyroscopic device comprising a resonator in the form of a disc, cylinder or like structure of circular outline, of a composition containing piezo-electric material and preferably made of a an integral mass of such material. The resonator is excited into dilatation-type vibration by electric currents applied to exciting electrodes electro-deposited in a regular pattern around the circumference of the structure, and these vibrations are sensed by detecting electrodes similarly deposited around t...