Abstract: A dispenser-applicator comprising a ball applicator assembly, oppositely-faced sponge applicator assembly, and a reservoir for storage of a topical preparation formed therebetween. The reservoir functions to supply the topical preparation to the ball applicator assembly to be dispensed onto a person's skin, whereupon the sponge applicator may then be used to more evenly spread the topical preparation over the person's skin. An elongated handle is connected to the ball applicator assembly to facilitate filling of the reservoir with the topical preparation and to further facilitate use of the applicator in applying the topical preparation to the person's skin.

Abstract: Multistage digital signal multiplying and adding apparatus suitable for a multistage filter includes a plurality of addition stages each having adding devices for forming a succession of partial products together with selectors operable in a first condition to connect sum and carry outputs of the adding devices within a stage to further adding devices within the stage or a second condition to supply outputs to a further stage, the selectors being operable to change condition without resolving carry signals in one stage through all bit positions of that stage. The output of one stage is connected to a subsequent stage during a first cycle of product formation of the subsequent stage so that the output is accumulated with the first partial product of the subsequent stage.

Abstract: A multi-stage apparatus has an input which is coupled to an output by way of a plurality of first stages. The stages are sequentially coupled together to form a chain. A spare stage, which is substantially identical to at least a selected one of said first stages is also provided. The apparatus also includes programmable logic means arranged to uncouple said selected first stage from said chain and to couple said spare stage into said chain such that the input remains coupled to the output by the same number of stages. In this way a redundancy scheme for the multi-stage apparatus is implemented.

Abstract: A cascaded array of devices, each having electrical signal processing elements arranged to process simultaneously the same input data, is provided with inter-device connections including signal delay so that an intermediate result of processing by a second device is combined with an output which was derived from a first device at a time related to that at which input data was input to the second device for use in forming its intermediate result.