Abstract: A device for storing a discrete quantity of liquid for use in a primary medical syringe for a bolus injection. The device comprises a body member having a core member inserted in the reservoir of the primary syringe. A liquid passageway for storing a radionuclide for the bolus injection is formed by a helical groove around the core member. A secondary syringe may be included in the primary syringe to measure small quantities of injectate.

Abstract: A position sensing apparatus 1 having two base stations spaced-apart a known distance on a datum line L. The base stations each comprise generators 2(a) and 2(b) which emit a rotating laser beam. The rotating laser beams are detected by a movable sensor 6 and datum sensors 7(a), 7(b) which are associated with the generators 2(a), 2(b) and are located on the datum line L. The time difference between detection of each laser beam by the movable and datum sensors 7(a), 7(b) is determined and is used to calculate positional angles .alpha. and .beta. between position lines between the movable sensor and each base station and the datum line L. As there are only two laser beams, they are differentiated by contra-rotation in the same horizontal plane. Vertical position is determined according to the vertical position on the movable sensor 6 at which the beams are detected.

Abstract: A product display and dispensing unit comprises a plurality of juxtaposed compartments made from body members and side panels. Keys are provided on the body members and engage complementary slots on the side panels. Each slot accommodates two keys, one key of a comaprtment located at either side of the panels. The lid comprises a plate member having a handle and an upper lip which engages dowels in the side panels.

Abstract: The invention provides a keyboard security device for preventing access to a keyboard, such as the digit keys of the keyboard of a digital telephone. The device comprises a base framework with a releasable and removable cover. An engagement member engages a recess in a side member of the framework. Locking means provided by resilient members on the cover engage openings in an inner wall of the framework. A key with spuds corresponding to the resilient members is pivotal in a key accommodating slot to engage the resilient members and disengage them from the openings.

Abstract: A device for storing a discrete quantity of liquid for use with a medical syringe for a bolus injection. The device comprises a body member having a core member covered by a cylindrical sleeve of clear plastics material. A liquid passageway for storing a radionuclide for the bolus injection is formed by a helical groove around the core member. Female and male connecting members at opposite ends of the body member, connect the device to a syringe and needle respectively.

Abstract: A hand held grinding device for sharpening drill bits comprises a pair of bearing members which rotatably support a grinding wheel fast on a shaft. Portion of the shaft is engagable with the chuck of a drill. A guide plate with grooves for various size ranges of drill bits is hingedly connected to the bearing members by a plastics hinge. The grooves direct the drill bit to the grinding wheel at an angle of 59.degree.. By pivoting the guide plate relative to the bearing members, the trailing portion of the cutting edge of the drill bit is relieved.

Abstract: A support assembly for shelving comprises a shelf supporting bracket having a rearwardly projecting tongue for interfitting in a complementary outwardly facing channelled groove in an upright. The bottom corner of the tongue is cut-away to form an upwardly extending slot for reception of a hollow cylindrical shaped body of resilient material which urges the lower portion of the tongue forwardly against the front face of the groove and prevents movement of the tongue along the upright.In another aspect of the invention an elongate member is inserted into the slot at one end to push the tongue forwardly against the front face of the groove and at its other end rests on another shelf supporting bracket to fix the upper bracket in position relative the upright.

Abstract: A fence assembly comprises a plurality of panels of expanded metal mesh having a plurality of closed meshes. The panels are arranged in zig-zag relationship, and each panel is joined to another panel by means of portion of some of the meshes of the panel adjacent an edge thereof, projecting through meshes of the other panel. The interlocking meshes are intertwined to retain the panels interlocked. The fence assembly may be secured to, or buried in, a trench in the ground.

Abstract: A vaginal speculum comprising an introitus engaging ring member and a pair of vagina engaging members of arcuate shape slidable through the ring member. The introitus engaging ring member is inserted into the introitus and the vagina engaging members are moved through the ring member in the direction of the arrow A. As the vagina engaging members are moved through the ring member into the vagina, ends move apart, thereby dilating the interior of the vagina.In another embodiment of the invention the vagina engaging members are pivotally connected to the introitus engaging ring member.

Abstract: A trailer comprises a container supported between a pair of scissors lifts having first and second arms movable about a pivot by a ram. The arms support the container by a pair of rollers and a mounting lug. The mounting lug comprises a lug on the container for engagement with a pair of U-shaped slots, a tilt slot and a lift slot. The lug engages the lift slot when the trailer is to be lifted. For tilting the lug engages the tilt slot thereby causing the rollers to disengage the container to permit tilting.

Abstract: The invention provides a nut tapping machine of the type driven by a drive chuck assembly comprising two sets of shank-embracing driving chucks one of which is always in engagement with the tap shank to drive it and each set is releasable sequentially from engagement with the tap shank to allow the passage of a blank along the shank. The invention solves the problems of incorrect thread form associated with other known tapping machines by providing a blank chuck assembly including a set of inwardly movable jaws each having a first flat face for engagement with the exit surface of a blank to true the blank relative to the tap.

Abstract: The invention provides a vibration sensing device which is used in safety and security equipment. The device is effectively an electrical switch and includes a pair of spaced apart electrically conductive plates each having an annular track formed by a hole. An electrically conductive bar is mounted between the plates on the tracks. On sensing a vibration the bar will resonate lifting off the tracks thus making and breaking the electrical circuit between the plates.

Abstract: The present invention provides an apparatus for cleaning submerged surfaces. In the apparatus two rotary brushes are supported side-by-side by a frame and provided with drive mechanisms to rotate the brushes in opposite directions; the brushes are each provided with a handle such that in use by a diver the brushes may be independently pivoted relative to the frame in such manner that each brush may be inclined towards or away from each other, to control the cleaning action of the apparatus and the movement of the apparatus relative to the surface to be cleaned.The apparatus may also incorporate mechanisms for the application of paint to a submerged and cleaned surface.

Abstract: A knitting machine having two opposed arrays of latched needles arranged in respective flat needle beds and means for actuating the needles of the arrays independently in succession along the arrays, the actuating means being borne by a carriage mounted above and movable back and forth longitudinally along the needle beds, the machine further including an elongated restraining element extending longitudinally between the needle beds, a housing to support and contain the restraining element, the restraining element also extending longitudinally between the needle beds, both housing a restraining element being borne by the carriage on a substantially horizontal support member for movement therewith, the element and the housing being relatively movable longitudinally of the needle beds whereby the element can be brought to an operative position projecting from the housing or to an inoperative position retracted in the housing, and actuator means for causing the restraining element to be in its operative position

Abstract: This invention relates to means for imparting angular movement to a first member connected to a second member by a hinge in one sense about said hinge pivot axis. The actuator is formed from a flexible substantially inelastic retaining means connected between two anchorage positions on the members and subtending that angle between the two members which is reduced on the first member moving relative to the second member and includes an elongated inflatable conduit of substantially constant surface area which is mounted between the members and the retaining means. The conduit is inflated to press outwards against the retaining means to cause the retaining means to exert a pulling force between the members to impart angular movement to one of said members relative to the other member in this one sense.

Abstract: The present invention relates to a fluid pressure powered actuator for imparting relative angular movement between two members, connected together by a hinge, comprising an elongated inflatable flexible conduit of substantial constant surface area, connected between the two members with its longitudinal axis substantially parallel to the hinge pivot axis and with the two members substantially equispaced around the conduit whereby on inflation, the conduit exerts a pulling force between the two members to impart relative angular movement therebetween.