Abstract: The invention provides apparatus for use by a physiotherapist, for measuring the force exerted by a patient, and for exercising a patient, particularly in a rehabilitation program. The apparatus is of the kind wherein the patient is required to exert a force against resistance beam arrangement and in the first aspect of the invention, there is a pre-set rest duration indicator which is adapted to issue a "count-down" signal to the patient up to a predetermined starting time at which the patient is required to exert force against the beam. This feature avoids the patient jerking a limb or body part when a force is required to be exerted against the beam. The indicator includes a graphic display device which has a presetable target force display. Hence the patient is able to obtain a visual indication as to when the force he is applying is equal to the target force.

Abstract: The invention provides apparatus for use by a physiotherapist, for measuring the force exerted by a patient, and for exercising a patient, particularly in a rehabilitation program. The apparatus is of the kind wherein the patient is required to exert a force against resistance beam arrangement and in the first aspect of the invention, there is a preset rest duration indicator which is adapted to issue a "countdown" signal to the patient up to a predetermined starting time at which the patient is required to exert force against the beam. This feature avoids the patient jerking a limb or body part when a force is required to be exerted against the beam.Another feature of the invention is that the indicator includes a graphic display device which has a presetable target force display. Hence the patient is able to obtain a visual indication as to when the force he is applying is equal to the target force.

Abstract: Test apparatus for a cathode ray tube has optical elements disposed along two optical paths from the screen of a cathode ray tube to two photosensors. One optical path passes through a graticule which has a pattern of light transmissive and non-transmissive areas. The real image of a luminous spot on the screen is accurately positioned on a boundary between two of the areas of the graticule by deriving a control signal from a comparison of the photosensor outputs.

Abstract: A top loading weigh balance is described which comprises a platform supported by a plurality of resilient suspension devices. Each suspension device is associated with a transducer connected in a resonant circuit of an oscillator, the transducers being arranged to vary the output frequency of the oscillator in accordance with the overall change in displacement of the suspension devices, and hence the load.