Abstract: Heat sealable polymeric films having an outer, polymeric heat seal layer with a viscosity at its heat sealing temperatures such that it will flow into interstitial spaces between the fibers of a fibrous material and encapsulate the fibers at such temperatures, an intermediate polymeric layer in contact with the heat seal layer, the intermediate polymeric layer being capable of cohesively splitting when the heat sealed film is peeled, and at least one further polymeric layer, the heat seal layer being easier to fracture than the intermediate layer at the temperature at which peeling is to be effected so that heat seal layer ruptures rather than peeling continuing through the intermediate layer once peeling has been effected through the heat sealed zone.

Abstract: A dental hygiene display for instructing and educating children on the proper toothbrush stroke technique, brushing duration, and stroke location including a human mouth figure with toothbrush motion simulation utilizing a liquid crystal display a speech processor and a piezo-electric sound emitting devise. The toothbrush stroke movements are simulated by multiple liquid crystal display segments activated and de-activated in sequence. The multiple liquid crystal display is repeated at various locations within the mouth. Additionally, a microprocessor circuit is provided for controlling of the crystal displays, brush stroke, speed, duration, and location within the mouth, as well as the speech processor and the piezo-electric sound emitting device.

Abstract: A Fourier-transform spectrometer contains a birefringent optical component, removing the need for a Michelson interferometer used in conventional instruments. A suitable birefringent element such as a Wollaston prism, is used to introduce a path difference between two light polarisations. Use of an extended light source so that all areas of the birefringent component are illuminated simultaneously ensures that different positions on the birefringent component correspond to different path differences between the two polarisations. A Fourier-transform of the resulting interferogram at the detector results in the spectral distribution of the input light being obtained. The use of an extended light source permits a Fourier-transform spectrometer with no moving parts to be achieved.

Abstract: A road vehicle suspension unit particularly suited for the front wheels of a front wheel drive vehicle has an outer subframe consisting of a double-wishbone structure which supports the road wheel and is mounted on a rigid inner subframe so as to accommodate vertical road wheel movement, which is strongly opposed by a spring or damper device. The inner subframe is mounted on the vehicle chassis or body by forward and rear resilient mountings such that horizontal wheel movement also is strongly opposed but with provision for some rearward movement of the wheel by turning of the subframe about an axis through the forward mounting.

Abstract: A rough terrain vehicle has a frame for supporting lading and equipment especially adapted for off-road, rough country use. The frame is supported on four wheels through pivot arms and hydraulically interconnected expansible chambers subject to manual hydraulic control. The vehicle is preferably self-propelled by an engine that also drives the hydraulic mechanism.

Abstract: A gripping device including a pair of side assemblies, each having a substantially constant arcuate cross-sectional configuration throughout its length, projections on its concave inner surface, and free outer edges while their inner edges are hingedly connected together by a hinge to enable said outer edges to be moved towards or away from one another. One said side assembly has along its inner edge a channel and the other is provided with a bead along its inner edge which is pivotally engageable within said channel by relative longitudinal sliding movement therebetween. A torsion-bar spring assembly is disposed adjacent the hinge and connected at its opposite ends into a recess in the respective side assembly and adapted to urge the said side assemblies apart. The parts are so made and arranged that said device may be held within a cupped hand of a user with the outer edges remote from the palm of the hand and disposed substantially parallel to the pivot axis of the user's hand.

Abstract: Porous material particularly suitable for selective sorption and retention of macromolecules are manufactured by mixing a finely divided inorganic material with a fugitive additive, forming into discrete particles and heat treating to remove fugitive additive. The fugitive additive is a solid which is preferably mixed with the inorganic material after dissolving the additive in a solvent which is not a solvent for the inorganic material.