Abstract: A filtration assembly can comprise a chamber for holding a fluid sample to be filtered and a cover assembly defining a petri dish into which a filter element can be placed for cultivating microorganisms present on the filter element. A filtration assembly can also comprise a sample reservoir for holding a fluid sample and a base for supporting the sample reservoir detachably connected to the sample reservoir. One of the sample reservoir and the base can have a projection extending around its periphery and the other of the sample reservoir and the base can have a groove extending around its periphery and detachably engaging the projection in a fluid-type manner around its periphery. A filtration assembly can also comprise a sample reservoir for holding a fluid sample to be filtered and a base for supporting the sample reservoir. The base can include a fluid port and communication with an interior of the sample reservoir and a skirt surrounding the fluid port for contact with a vacuum manifold.

Abstract: A method of and an apparatus for forming a composite web for use in making a fuel element for smoking articles comprises a dual bobbin unwinder from which alternate glass fiber webs are unwound. A splicing apparatus is used to splice together the webs unwound from the two bobbins of the unwinder. Sensing and speed controls are provided for sensing unwinding speed and the amount of web remaining on a bobbin for controlling web accumulation prior to splicing and stopping of the web to effect a splice. Downstream of the splicing apparatus the web is fed to a composite web former where it is slit into equal halves and vertically separated. A paper web is guided between the two web halves and the webs are converged into a three layer composite web with the paper web sandwiched between the glass fiber web halves. The composite web is fed to a KDF filter maker where it is combined with a carbonaceous rod for making a fuel element.

Abstract: Disclosed are new fuel components for smoking articles such as cigarettes, new methods of making such fuel components, and cigarettes or other smoking articles incorporating the new fuel components. Fuel components for smoking articles are formed by continuously extruding a composition to form a preselected shape, circumscribing the continuously extruded composition with a layer of material to form a wrapped rod or composite member, preferably bonding the fuel element to the layer of material, and cutting the resulting composite member into predetermined lengths for use in assembling smoking articles.

Abstract: A network of different weighted resistances, for example, binary resistances, coupled in parallel with each other, is provided in a semiconductor body by providing a plurality of substantially identical resistors, with different numbers of the identical resistors being coupled in parallel to provide the required different weighted resistances of the network, possibly, the constituent identical resistors of the different weighted resistances of the network being interdigitated with each other.

Abstract: A resistor comprises two identical resistor regions with each resistor region isolated within the semiconductor body by a P-N junction, and with one electrode-bearing end of each resistor region both connected together and to a common region surrounding the resistor regions within the semiconductor body, so that the common surrounding region is to be at the same potential level as the mid-point of the resistor considered as a whole.

Abstract: In an integrated circuit semiconductor device different matched resistors are provided by at least one resistor comprising at least two matched resistor parts connected together, these resistor parts also being matched to each constituent resistor part of at least one different matched resistor of the device.

Abstract: A circuit arrangement at least partially embodied in a collector-diffusion-isolation (CDI) type device, in a semiconductor body comprising a thin layer initially wholly of one conductivity type on a substrate of the same conductivity type, has at least one component comprising a modification of previously known CDI type constructions i.e.

Abstract: A circuit arrangement is at least partially embodied in a collector-diffusion-isolation (CDI) type device, in a semiconductor body comprising a thin layer initially wholly of one conductivity type on a substrate of the same conductivity type, and the device has a plurality of CDI-type components, each CDI-type component with a combination of regions of the opposite conductivity type, comprising a buried layer at the interface between the thin layer and the substrate, and an isolation barrier for the component extending through the thin layer to contact the buried layer, the circuit arrangement being such that no constituent component of the device breaks down when a potential difference of up to substantially twice the breakdown potential of the outer P-N junction of each CDI-type component, and at least of 10 volts, is applied across the device. Usually the substrate of the body is at the most negative potential level associated with the device.