A junctor for use in a time division multiplex telephone system comprising a plurality of stores equal in number to the number of time slots in one frame period, means for routing intelligence signal samples sampled during particular time slots into respective ones of said stores, means for controlling said stores such that said samples are stored for predetermined periods, means for routing each of said samples out of the respective store at the end of the respective predetermined period as ano...

This invention relates to direct reading calculators and to same when incorporated as part of a shopping cart handle. Briefly, the calculator comprises a pair of rotatable cylindrical members each of which carries a logarithmic scale. Means are provided for indexing one of the cylindrical members to the other for simultaneous rotation. The scales are preferably calibrated respectively in price units and in weight and volume units.

The invention provides a hydrostatic bearing arrangement for a machine tool. Two "floating pad" type hydrostatic bearings are active between first and second relatively movable parts of the machine, the bearings facing in opposite directions. A detector is fixed relatively to the first relatively movable part, and directs a fluid outlet towards a reference surface. The back pressure at the detector is measured and and the pressure of fluid supplied to one of the bearings is controlled in proport...

The manufacture of a channel-shaped ferroconcrete unit in which a ferroconcrete bottom slab and two ferroconcrete side slabs having pretensioned tendons or passageways passing from the bottom slab to the remote edge of each side slab are arranged in channel formation with the tendons being stressed whereby suitable stress loads in the tendons are realized within the bottom slab and side slabs. The pretensioned tendons pass around radiused bends at each junction between the bottom slab and one of...

An instant tea composition is produced by a process which comprises disintegrating green leaf, mixing the disintegrated leaf with water in a fermentation vessel having an inlet for introducing gas into the resulting suspension, introducing an oxygen-containing gas into the suspension at a controlled rate of flow, allowing fermentation to take place while controlling the concentration of dissolved oxygen, eliminating further enzyme activity upon completion of the desired fermentation and drying a...

An adjustable stay comprising a tubular member having an elongated member telescopically extensible therefrom, one of said members having at least part of its length of non-circular cross-section and the other member having a co-operating portion of non-circular cross-section adapted upon relative rotation of the members to engage and disengage the said one member.

A hydrophone adapted to be suspended underwater by means of a cable, which preferably carries electrical leads as cores thereof, includes a transducer element having substantially axial symmetry. The element is secured in a yoke by means of mountings positioned on the axis of symmetry, and the electrical leads for deriving output signals from the element are connected to respective points on the transducer so that the effects of vibrations transmitted along the cable to the element tend to be se...

The invention relates to a shearing machine for the cutting of metal sheet and other sections and in particular to an hydraulic system of clamps used to locate the sheet being cut and in which the loads applied to the clamps is transferred from the hydraulic system to a mechanical linkage better able to resist these forces. The present invention relates to a clamping device particularly for use with guillotines, shears and like machines employed in severing metal plates, sections and the like. F...

Vacuum apparatus for carrying out a vacuum process within a given region of the chamber, in which gas is introduced to and removed from the region continuously so that the process can be carried out at a selected pressure within the region notwithstanding the fact that the remaining part of the chamber is at a lower pressure.

In a machine-tool arranged to accept pre-set tools, a tool carrier on which the pre-set tools are detachably mounted. The tool carrier is arranged to be adjustably located on a tool support structure so as to permit alignment, and re-alignment after wear has taken place, of the carrier with the spindle axis of the machine-tool, of which the following is a specification.