Abstract: Processes and arrangements for the evaluation of laser Doppler signals, especially in laser Doppler anemometers (LDA) or vibrometers, are disclosed. The object of these processes and arrangements is to find a simple possibility for evaluating laser Doppler signals which retains the advantages of conventional frequency tracking demodulation and permits dependable actual measurements of velocities and derived movement values also for extremely low velocities and discontinuous particle flows. This object is achieved with the use of a laser Doppler anemometer (LDA) with bandpass filtration and frequency tracking demodulation, by generating at least one orthogonal frequency system which, as a sequence of four state intervals in an invertible one-to-one correlation, is formed of two additively superimposed rectangular functions with a phase displacement of .pi./2, a detector signal containing the Doppler frequency (f.sub.

Abstract: An apparatus for intraorgan administration of medicinal agents, such as, cells, growth factors, drugs and other agents under direct visualization, for example using an endoscope, by an apparatus and method which create needle channels within the target organ and deposits by injection, the medicinal agent in high concentrations at designated sites of the target organ. The device consists of a chamber having at least one retractable hollow bore needle; a reservoir for containing an injectable medicinal agent which is in communication with the needle and control means for extending and retracting the needle from and into the chamber and forcing the medicinal agent from the reservoir into the needle and injecting it into a target organ, said control means being suitable for effecting control through an endoscopic tube. Also disclosed are injection needles having side openings therein for enhanced administration of the medicinal agent to the target organ.

Abstract: A catheter for use with the vascular system includes an elongated catheter body which has a side wall defining an interior catheter lumen. A plurality of openings are provided in the side wall at a first distal zone of the catheter body. The openings are adapted for relatively low pressure movement of fluid therethrough. A plurality of normally closed pressure responsive exits are located in a side wall at a second distal zone of the catheter body, the second distal zone being spaced from and positioned proximal of the first distal zone. The pressure responsive exits permit fluid material to exit from the catheter lumen in response to internal fluid pressure which is greater than a predetermined magnitude. An intermediate zone is located between the first and second distal zones. A removable occluding member is adapted to be positioned within the catheter lumen. The occluding member has a sealing element with a collapsed insertion state and an expanded sealing state.

Abstract: A multi-function mouse pad adapted to be utilized with a computer mouse and that includes apertures therein so that the mouse pad also can be utilized as a stencil or template. The apertures may be in the form of round holes of varying diameter so that the outer diameter of a tube can be measured. The apertures may also have different geometric shapes. The mouse pad further can include a needle gauge aperture to be utilized to measure the gauge size of a needle. The mouse pad also can include round projections extending therefrom for purposes of measuring the inner diameter of round, hollow tube. Such projections can extend from the top surface or a side surface of the mouse pad.

Abstract: A process is proposed for producing a protective layer on workpieces made, for example, from carbon composite material, for use at temperatures above 1000.degree. C. In accordance with the invention, a comminuted solids mixture with refractory ceramic powder articles, e.g., of carbides, nitrides and/or silicides, preferably from groups III, IV and/or VIb of the periodic table, and with at least one compound of the general elemental composition Me.sub.x B.sub.z, where Me represents one of the elements Si, Al, Zr, Ti, Hf or Y, and x and z each represent a number from 1 to 6, and optionally, in addition, with at least one already formed glass with the following general oxidic composition: Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --SiO.sub.2 --RO, where RO represents MgO, CaO or BaO, is dispersed in a liquid carrier system, deposited on free surfaces of a workpiece, and heated together with the workpiece briefly with air access to a maximum temperature of 1200.degree. C.

Abstract: A device for securing a moving object at a destination has, as a object, the imparting of flexibility to the position of the object to be secured; this object also applies when the space for special securing elements is relatively small and is predetermined to with respect to its location. The device comprises elements which engage one inside the other. A first part of these elements is provided so as to be stationary at the destination and a second part is provided at the moving object. An approach arrangement facilitates the engagement of the elements one inside the other. The first part serves as a guide device for the second part and permits a movement of the second part in a first direction and blocks a movement vertical to this direction. Further, the guide device has a stopping arrangement for stopping the object in at least one location along the path of the permitted movement. The second part engages in the first part by means of movement which are offset relative to one another with respect to time.

Abstract: The production of compact molded bodies of rare-earth transition-metal boron carbide and boron nitride compounds configured so as to avoid a selective evaporation of individual components in the production process and enable an exact adjustment of the desired stoichiometry. The process is characterized in thata) a powder mixture with particles sizes from 1 to 250 .mu.

Abstract: The rigid vinyl chloride resin composition comprises 100 parts by weight of a vinyl chloride resin having an average degree of polymerization of 350 to 600, 5 to 30 parts by weight of an impact-resistant improver, and 5 to 20 parts by weight of an acrylonitrile-styrene copolymer having a weight ratio acrylonitrile and styrene of 1/99 to 9/91. This composition has good impact strength and fluidity.

Abstract: A sound reproduction arrangement having at least one sound transducer and a holding means carrying the at least one sound transducer, for support on the body of a user is disclosed. Such an arrangement has been known hitherto as a headset. The headset has two ear caps, in each of which is arranged at least one respective sound transducer. The headset is supported on the body of the user by virtue of it being fitted on to the head so that a respective ear cap bears with its open side directly on an ear of the user or encloses same, and thus the sound transducer or transducers disposed in the ear cap output the acoustic signals directly to the ear (the known headset would therefore in itself be more correctly identified as a .vertline.earphone.vertline.). It is characteristic of a headset that the left ear receives only the left audio signal and the right ear receives only the right audio signal of the headset.

Abstract: A structure of an armature of a radial rib winding type rotating electric machine which constitutes at least a member of a stator or a rotor is disclosed. The structure comprises a laminated core having an annular core portion, a radial rib-like core portion that extends radially from the annular core portion toward an opposing member and a facing core portion that is formed at the edge of the radial rib-like core portion to face the opposing member. A coil is wound about the radial rib-like core portion of the laminated core. A partial laminating core is laminated on at least the facing core portion of the armature to enlarge the facing surface thereof opposite the opposing member. The total lamination thickness of the facing core portion and partial laminating core portion is larger than the thickness of the radial rib-like core portion.

Abstract: A beam deflecting unit for multiple-axis examination of specimens in a microscope is disclosed which, on the one hand, enables the illumination and/or observation of the specimen from several sides and, on the other hand, allows observation of the specimen at an angle to the illumination axis. The examination of the specimen is carried out with an available microscope and with the beam deflecting unit according to the invention which is located between the microscope objective and the focal plane.

Abstract: A fiber-optic arrangement for additive mixing of a plurality of light bundles comprises individual light-conducting cores for guiding laser light bundles independently and separately from one another, wherein each of the cores has a light entry location and a light exit location. The light-conducting cores are enclosed by a common cladding and are arranged so as to run alongside one another within said cladding. Propagation directions of the light bundles are identical in all cores. Light exit locations of all cores are arranged in a common plane oriented at a right angle to the propagation direction. The lateral distance between every two cores at the light exit locations are smaller than the lateral distance between the same cores at the light entry locations.

Abstract: A glove liner is provided with heating units placed at the fingertips to provide heat to the fingers. The heating units are encased in an electrically insulating material and wires which are covered with an electrically insulating and flexible material connect the heating units in series with a battery pack on the wrist of the wearer. The heating units and the wires are placed on the palm side of the lining and the heating units contact the fingers directly.

Abstract: A damper comprises two cold air inlets through which a fluid flows, two gate plates which open and close the two cold air inlets and a drive unit for driving the two gate plates. The drive unit is installed between the two cold air inlets to open and close the gate plates. The drive unit operates to control the fluid flow. In a particular form, the damper is installed in a refrigerator for opening and closing two cold air inlets of the refrigerator.