Abstract: An adhesive dispensing sheet including a plurality of pressure sensitive adhesive segments disposed on a carrier material is disclosed. The adhesive segments are separated from one another on the carrier material by perforations. The perforated adhesive dispensing sheet permits a single adhesive segment to be carefully torn away from and thereby detached from the remaining adhesive segments on the adhesive carrier sheet to allow for easy placement of a single adhesive segment. Thus, the pressure-sensitive adhesives may thereby be dispensed onto any item in exactly the proper location without damaging the adhesive segment or the remainder of the adhesive dispensing sheet.

Abstract: Interferometric two-dimensional displacement measuring system A measuring system for an apparatus having a bed, a first stage movable in a first direction relative to the bed, and a second stage movable in a second direction at right angles to the first direction, relative to the first stage. A first interferometer measures displacement in the first direction between a first reference reflector and a first target reflector fixed to the first stage. A second interferometer (a) measures displacement in the second direction between a second reference reflector and a second target reflector fixed to the second stage, (b) includes an intermediate reflector fixed to the first stage, (c) produces a beam that extends in the first direction from a position fixed to the bed to the intermediate reflector and in the second direction from the intermediate reflector to the second target reflector and (d) can therefore have a head that is mounted on the bed.

Abstract: A compound of formula (I) wherein X is aluminium, gallium or indium; each Y, which may be the same or different, is nitrogen or phosphorus; R1 and R2, which may be the same or different, are hydrogen, halogen or alkyl; and R3 to R7, which may be the same or different, are hydrogen or a saturated group, or R3 and R4, or R5 and R6 together represent a saturated divalent link thus completing a ring.

Abstract: A retroreflector has three mutually-orthogonal reflective surfaces arranged around an optical axis. The reflective surfaces stop short of the optical axis to provide a central region of the retroreflector which transmits incident light and a peripheral region of the retroreflector which retroreflects incident light. When the reflector is used in a Jamin-type interferometer with another reflector, this enables the interferometer to be used for measuring displacement between the reflectors. In the interferometer, a projected beam is disposed between a pair of return beams and/or one of the return beams is disposed between a pair of the projected beams. This enables a first contiguous area of a face of a beam splitter to be provided with a phase-shifting coating to produce a phase quadrature relationship between a pair of interferogram beams. This simplifies the masking required when applying the coating.

Abstract: An automatically adjustable seat system (10) includes a sensor (48) for detecting the position of a physical feature of the driver, such as the eyes. The sensor (48) is in communication with a controller (46), which transfers the detected physical feature of the driver thereto. A seat positioning (50) mechanism is in communication with the controller (48) to automatically locate the seat (14) in a position which provides the driver with an optimum field of view. The controller (48) is also in communication with a pedal box (28) and a steering column (26) to automatically position the pedals (26), based on the information from the sensor (48), in an optimum position for use by the driver.

Abstract: A retroreflector has three mutually-orthogonal reflective surfaces arranged around an optical axis. The reflective surfaces stop short of the optical axis to provide a central region of the retroreflector which transmits incident light and a peripheral region of the retroreflector which retroreflects incident light. When the reflector is used in a Jamin-type interferometer with another reflector, this enables the interferometer to be used for measuring displacement between the reflectors.

Abstract: A Michelson interferometer has a wedge-shaped beamsplitter (7) and compensator (9) plates of substantially identical wedge angle and thickness. The compensator plate is positioned to cancel out beam displacement and deviation introduced by the beamsplitter plate.

Abstract: A cam follower shoe for a fuel injection pump is constructed to hold captive the roller of the cam follower. Two shoes are constructed at the same time from a single block of material which is bored to produce a bore and is then divided into two parts by a pair of cuts which extend axially crossing from one side of a diametral plane to the other, the plane being normal to the direction of movement of the shoe in use. At one end of each shoe the surface subtends an angle of less than 180.degree. but at the other end of the shoe when the cuts are straight, the surface subtends an angle of greater than 180.degree..