Abstract: This invention relates to microfluidic apparatus for reading, writing and sorting magnetic tags attached to chemical and biological molecules and other entities. We describe apparatus for separating chemical or biological molecules or moieties each individually attached to a MBM tag miniature multi-bit magnetic tag capable of adopting a plurality of remanent magnetic configurations corresponding to binary information, the apparatus comprising: at least one input for said tagged molecules or moieties; at least two outputs for said tagged molecules or moieties; a microfluidic flow channel incorporating: magnetic readers to read said binary information; magnetic writers to write said binary information; and a switch to direct said tagged molecules or moieties to a selected said output responsive to said binary information. The invention also relates to planar multibit magnetic tags suitable for use with such apparatus.

Abstract: The present invention relates to a zero turning radius vehicle having at least one steerable front wheel and a multistage steering input system separately capable of steering the at least one front wheel and selectively driving the drive wheels. A front wheel steering system comprises at least one oblongated sprocket meshingly connected to a steering shaft. An engagement cam system provides the ability to selectively, independently couple the steering wheel to pump arms driving a first and second drive wheel. A steering cam shaft comprises at least one steering cam that acts on at least one bearing. Once the engagement cam system rotates the at least one bearing into place to receive the at least one steering cam, rotation of the steering cam independently alters the speed of one drive wheel in relation to the other drive wheel in response to steering input provided by the operator.

Abstract: This invention relates to microfluidic apparatus for reading, writing and sorting magnetic tags attached to chemical and biological molecules and other entities. We describe apparatus for separating chemical or biological molecules or moieties each individually attached to a MBM tag miniature multi-bit magnetic tag capable of adopting a plurality of remanent magnetic configurations corresponding to binary information, the apparatus comprising: at least one input for said tagged molecules or moieties; at least two outputs for said tagged molecules or moieties; a microfluidic flow channel incorporating: magnetic readers to read said binary information; magnetic writers to write said binary information; and a switch to direct said tagged molecules or moieties to a selected said output responsive to said binary information. The invention also relates to planar multibit magnetic tags suitable for use with such apparatus.

Abstract: The present invention relates to a zero turning radius vehicle having at least one steerable front wheel and a multistage steering input system separately capable of steering the at least one front wheel and selectively driving the drive wheels. A front wheel steering system comprises at least one oblongated sprocket meshingly connected to a steering shaft. An engagement cam system provides the ability to selectively, independently couple the steering wheel to pump arms driving a first and second drive wheel. A steering cam shaft comprises at least one steering cam that acts on at least one bearing. Once the engagement cam system rotates the at least one bearing into place to receive the at least one steering cam, rotation of the steering cam independently alters the speed of one drive wheel in relation to the other drive wheel in response to steering input provided by the operator.

Abstract: A magnetic element comprises a closed loop of ferromagnetic material having an even number of magnetic domains of opposite sense. The magnetisation within the domains is in a circumferential direction, and the domains have leading and trailing walls extending from the inside to the outside of the loop. The magnetic element has a geometry such that there are at least two stable equilibrium domain configurations in which the domain walls are confined in predetermined portions of the loop and wherein the element is switchable between the stable configurations upon the application of a external magnetic field.

Abstract: A magnetic element comprises a closed loop of ferromagnetic material having an even number of magnetic domains of opposite sense. The magnetisation within the domains is in a circumferenial direction, and the domains have leading and trailing walls extending from the inside to the outside of this loop. The magnetic element has a geometry such that there are at least two stable equilibrium domain configurations in which the domain walls are confined in predetermined portions of the loop and wherein the element is switchable between the stable configurations upon the application of a external magnetic field.

Abstract: A sliding door support assembly having a preassembled track assembly including a split cylindrical elongate track having a flat surface on the top and a number of mounting brackets secured to the flat surface at spaced intervals and a number of support members for supporting an elongate track cover, the support members being mounted on said track assembly after the door has been mounted in the track assembly and being selected to correspond to a particular type of track cover.