A method of manufacturing a battery plate pack comprises assembling a stack of battery plates interleaved with separators, and positioning the resultant assembly adjacent a stationary plastics extrusion nozzle 6. The assembly is then traversed over a path such that the side and bottom edges of the pack are moved progressively past the nozzle while the latter extrudes on to the pack edges a sealing...

A matrix addressed, bistable liquid crystal optical display is disclosed. The display includes a liquid crystal twist cell which has at least two states which are stable in the presence of a single given holding voltage. A form of 3:1 matrix addressing is used in the display which enhances operational characteristics.

A safety ski binding releasably holding a boot on a ski. The binding includes a jaw adapted to hold the boot and to pivot laterally, and an elastic mechanism biasing the jaw against lateral pivoting. When vertical stress acts on the binding, friction is generated which further biases the jaw against lateral pivoting, thereby preventing lateral release of the boot when dangerous lateral stress acts...

An umbrella with an oval canopy comprising a center pole (1), a plurality of long main ribs (12), and a plurality of short main ribs (31). The center pole (1) consists of upper and lower poles (1') (1'') slidably fitted. Each long main rib (12) consists of a proximal long main rib (16) and a long distal rib (19) slidably fitted to the proximal long main rib (16) through a slide member (18). Each s...

An umbrella with an oval or substantially oval canopy comprising a center pole (1), a plurality of short conventional main ribs (3), and a plurality of long main ribs (18). Each long main rib (18) consists of a proximal main rib (20), a distal main rib (22) slidably fitted to the proximal main rib (20) through a slide member (30), and upper and lower stops (31)(32) fixed thereon. When opened, the ...

An industrial truck is described in which an additional third sensor remote from the usual two tracking sensors is provided. This is said to improve cornering and reduce swerving during straight line travel. Four modes of travel may be provided i) straight passage between racks ii) straight passage away from racks iii) straight paths where the vehicle is not centred on the track iv) cornering, the...

A lock includes a solenoid-operated striker unit (4) for capturing pin-bolts (9) of the shot bolt assembly (3) of a key-operable locking mechanism (1) ofa hinged door (2). The pin-bolts (9) are captured within a keep channel-member (13) that slides up and down within a fixed channel-member (10) between an upper, release position in which slots (14) in the member (13) are in register with slots (11...

A process of hydrometallurgical treatment for removing metal impurities from zinc sulfate solution containing Fe+++ ions includes adding to said solution a silicate capable of forming dissolved silicic acid in situ, and a neutralizing base to provide a pH between 1.5 and 4.5. The metal impurities are precipitated as a solid residue on a base of iron silicate.

The unit comprises a cylinder housing (8) and a piston (7), which latter is axially movable out of the open end (13) of the cylinder housing (8), as well as an annular seal (9) in an annular groove (10) in the cylinder housing (8). The radially outer wall (22) of the annular groove (10) extends like a truncated cone and is enlarged towards the open end (13). The annular groove (10) is confined by ...

A control system for the clutch of a torque converter to allow direct drive operation of the torque converter in more than one transmission drive train speed level. The fluid pressure normally causing coupling of the clutch is interrupted by a blocking device when a change in drive trains occurs resulting in a lower fluid pressure on one of the drive train operating clutches, and that interruption...

A method of facilitating the incorporation of hydroxypropyl methyl cellulose (HPMC) into a liquid formulation containing water which comprises forming a liquid premix of hydroxypropyl methyl cellulose dispersed in an aqueous-free organic liquid medium in which it does not swell or dissolve, selected from the group consisting of liquified nonionic surfactants, fatty acids, anionic surfactants and m...

The invention provides a cutting device for use on animal carcasses, comprising a handled frame (7), a knife (1) carried in the frame and provided with a fluid pressure operated means (2) for oscillating the knife in the frame, the oscillating means being arranged at one end of the knife which end is remote from the handle (13) on the other side of the carcass when the device is in use. The guide ...

A positioning machine of original films on a base sheet, wherein a base sheet having a pair of first register pin holes and pairs of second register pin holes is placed on a base plate which is provided with a pair of first register pins and pairs of second register pins corresponding to the first and the second register pin holes, by fitting the first register pins into the first register pin hol...

A drill pipe tester valve for installation in a pipe string has a housing having a first end adapted to be connected to a well test string, which housing has a flow passage (90) therethrough. A spherical valve member (92) is disposed in the flow passage of the housing. Lugs (118) are provided for engaging the spherical valve member and rotating the spherical valve member between open and closed po...

A gearbox 1 comprises a housing 2 containing a reduction stage 18 comprising a first gear 19 rotatable about a axis 20 and in mesh with a second gear 21 rotatable about parallel axis 22, the first gear 19 being mounted in a carrier 23 pivotable about the axis 22 of the second gear 21 and constrained by a torque sensing device 26 connected between the carrier 23 and the housing 2. When a predetermi...

A method is provided for the processing of coarse-grained waste rubber preferably on a continuous basis into a secondary rubber raw material. In the method coarse-grained waste rubber having a particle size of 0.5 to 15 mm, preferably approx. 4 to 6 mm, is subjected in a layer of a thickness not exceeding the largest dimension of a single grain to a thermoshock treatment in the restricted access o...

A composition suitable for making crosslinked and optionally foamed shaped structures comprises polypropylene with 2 to 20% of its weight of polybuta-1,2-diene having a molecular weight of 500 to 10,000 and with 10 to 50% of its weight of high- density or low-density polyethylene and optionally also a cross-linking agent and/or a foaming agent. After shaping the composition and subjecting it to a ...