Abstract: A multi-page bookmark is disclosed. The multi-page bookmark includes straps adapted to form loops removably received around the front cover and the rear cover of a book, respectively. The loops are positioned adjacent the binding of the book. A connecting member is disposed between the loops adjacent an upper end of the book. The connecting member spans the book binding and is adapted to have at least one elongate book marking ribbon attached thereto which extend from the connecting member, wrap the upper end of the binding of the book, and may be received between selected pages of the book.

Abstract: A multi-page bookmark is disclosed. The multi-page bookmark includes straps adapted to form loops removably received around the front cover and the rear cover of a book, respectively. The loops are positioned adjacent the binding of the book. A connecting member is disposed between the loops adjacent an upper end of the book. The connecting member spans the book binding and is adapted to have at least one elongate book marking ribbon attached thereto which extend from the connecting member, wrap the upper end of the binding of the book, and may be received between selected pages of the book.

Abstract: A rotatable shaft and pulley arrangement (1) has a tube (2) made of a suitable metal and having ends with knurled outside peripheries (3) onto which pulleys (5, 8) are press fit and laser welded for balanced low-weight attachment. A keyway (9) is stamped into a central portion of the tube to minimize weight imbalance and cost. An attachment wall (10) as preferably a ring groove is rolled into the tube to provide a circumferential attachment base for a fastener head (13) having a fastener shaft (15) that is threaded into an engine shaft for attachment of the tube to the engine shaft.

Abstract: A ventilated wooden closet shelf primarily for residential homes. The shelf, which may be made in any length, includes a wooden rear beam of uniform square or rectangular cross section and a wooden front beam of uniform cross section. Each of the two beams contain a flat vertical side which is drilled to form a line of equally spaced apart cylindrical holes. The shelf also includes a number of identical wooden shelf members, each of which has an elongated upper horizontal surface and at each end a cylindrical stub sized to fit into one of the holes in the front and rear beams. The spacing between the cylindrical holes is such that adjacent shelf members are spaced apart a distance of less than the width of the elongated horizontal upper surfaces of the shelf members to provide ventilation through the shelf.

Abstract: A method of and apparatus for carrying out machine vision of an object for obtaining object data therefrom in which the object is illuminated by frequency swept ultrasonic stress wave energy from a transmitting and receiving transducer array, or by light energy from a source, reflected signals are received respectively by the array and an optical-electronic camera, respective images in terms of the data contained in these received signals are fed to a processor in which the data is analysed to make use of the best data derived from both sources of illumination and the resulting data compared with reference data to provide stimuli controlling a reject device and/or positional adjustment devices directing the array and/or the camera.

Abstract: A transducer for effecting conversion between stress wave energy and electrical energy comprising a plurality of individual electrically conductive electrode elements presenting an array of coplanar electrode element faces, an overlying sheet of dielectric material carrying an electrically conductive film or coating on its side remote from the individual electrode elements and which is common to the individual electrode elements, means for supporting the sheet peripherally to lie freely on, but in tension over, the coplanar faces of the individual electrode elements, adjacent areas of which are spaced from each other by gaps which are sufficiently large compared with the thickness of the sheet to avoid or minimize shear stress transmission between adjacent areas of the sheet overlying respective adjacent individual electrode elements.

Abstract: A method of and apparatus for locating an object by stress wave energy reflection in which the wave energy is transmitted as a beam by transmitting transducer elements, and is scanned through successive sectors of a field of view by imposing differential transmission delays on transmitting signals fed to the elements by means of a delay line. Indicator signals are developed in receiving channels connected respectively to receiving transducers providing binaural characteristics, and transducer providing monaural characteristics but collectively covering the field. An indicator means comprises any, or any combination, of audible means, visual means or tactile means the two latter providing coordinate displays.

Abstract: A method of locating an object by wave energy reflection and an apparatus therefor in which receiving outer transducers provide directional receptivities represented by polar lobes diverging on opposite sides of a reference axis and an inner receiving transducer provide a directional receptivity represented by a narrower polar lobe centered on the reference axis. The signals received from the outer transducers are operated upon in channels of the receiver to modulate them with a frequency swept local signal derived from the transmitted signal and develop indicator signals of difference frequency between the transmitted and received frequencies and which represent the range of the object. The outer signals are displayed binaurally, to enable the user to achieve firstly approximate directional sensing by binaural effect, and thereafter more accurate directional sensing by the use of signals developed in a central channel and derived from the inner transducer or outer transducers simulating an inner transducer.

Abstract: A method and apparatus for obtaining an audible signal containing information as to the characteristics of at least one moving element situated internally of a living body and in which a transmitting transducer fed with an electrically generated signal of supersonic frequency transmits stress waves through the body tissue to the moving element to be investigated, and a receiving transducer receives reflected waves and feeds a received electrical signal to a receiver containing a multiplier or other modulator for generating an output signal of difference frequency in the audible range, and the transmitting signal is subjected to frequency sweep and has a mean value and a sweep which produce frequency variations in the electrical difference signal arising from change of position of the element under investigation and motion of this element, the electrical difference signal being fed to a transducer for audible reproduction of a sound pattern representative of the variations of position and motion of the element

Abstract: A method of and apparatus for locating an object by stress wave energy reflection in which the wave energy is transmitted as a beam by transmitting transducer elements, and is scanned through successive sectors of a field of view by imposing differential transmission delays on transmitting signals fed to the elements by means of a delay line. Indicator signals are developed in receiving channels connected respectively to receiving transducers providing binaural characteristics, and transducer providing monaural characteristics but collectively covering the field. An indicator means comprises any, or any combination, of audible means, visual means or tactile means the two latter providing coordinate displays.