Abstract: The invention proposes a method of detecting respiratory information of a user. The method comprises a step of instructing the user to perform on a device a movement reflecting his respiratory action; a step of generating by said device, a signal reflecting said movement; and a step of deriving the user's respiratory information from said signal. By using this method, the respiratory information is easily detected without attaching any sensor on the user's chest.

Abstract: An exemplary method includes defining an environment, formulating an anti-keystoning algorithm based at least in part on the defined environment, projecting a laser image from a source to a surface of the defined environment, determining at least one vector parameter with respect to the source and the surface and correcting the laser image based on the anti-keystoning algorithm and the at least one vector parameter. Various other apparatuses, systems, methods, etc., are also disclosed.

Abstract: An exemplary method includes defining an environment, formulating an anti-keystoning algorithm based at least in part on the defined environment, projecting a laser image from a source to a surface of the defined environment, determining at least one vector parameter with respect to the source and the surface and correcting the laser image based on the anti-keystoning algorithm and the at least one vector parameter. Various other apparatuses, systems, methods, etc., are also disclosed.

Abstract: A vacuum cleaner head, for attachment directly to a vacuum cleaner body having a central longitudinal axis, has exposed bristles with remote ends on a plane off-set by about 70.degree. to the central axis. The bristles extend along opposing sides of a lower surface of the head in strips at either side of a channel through which dust and debris gathered up by the bristles passes into the vacuum body. The off-set plane means that when the body is held directly or by a handle, a natural comfortable sweeping action, with the handle axis at about 20.degree. to the vertical, keeps both strips of bristle in contact with the swept surface.

Abstract: A combined vacuum cleaner and broom device includes an elongate hollow handle connected at its lower end to separable housing parts. The housing part contains an electric motor and fan and the housing part contains a dust collecting compartment. Lines of bristles extend across a lower end of the housing part and form between them a dust passage. The dust passage is partly closed off by elongate porous resilient pads. Rechargeable batteries are stored with the handle and an electric switch with a slidable operating disc turns the motor ON and OFF. The lines of bristles are relatively off-set with respect to the height of the device to provide a normal sweeping orientation during use, that is with the handle at say 25.degree. to the vertical. The device is normally used simultaneously as a broom and the vacuum cleaner.

Abstract: A universal socket is described which is suitable for use upon a myriad of fastening means whereupon at least a plurality of pins are capable of longitudinal axial movement in concert and in conformity with contact with a workpiece. This result is achieved by the incorporation of a biasing mechanism on the pins which biases the pins in a normally extended position, but which permits movement to a second retracted position. In one embodiment, the cross-sectional area of the pins is decreased in either a linear or non-linear manner from the outer periphery to the center of the socket. In operation, as the workpiece is inserted into the socket, the pins are moved in a longitudinal axial direction from their normally extended position to the second retracted position in conformity with the shape of the workpiece.