Abstract: The present invention relates to an air cleaner for removing air pollutants from an air stream, for instance such as the cleaning exhaust/intake gas of an amusement machine, said air cleaner comprising a filter device including at least one filter layer (4a, 4b) held by a filter holder (5) in said airflow substantially perpendicular to a main flow direction thereof and including a plurality of preferably stick-shaped filter elements (6) neighbouring each other. In accordance with the present invention, the filter device has no closed surrounding along the circumference of the filter layers, but provides for an open side along at least a portion of the periphery of the filter layer. At least one circumferential side section (7, 8) of the filter layer parallel to or tangential to the longitudinal axis of an outermost filter element is formed as an open side free of flow control elements surrounding the filter layer.

Abstract: The invention relates to a method for the digital transmission of an analogue measuring signal (M), comprising the following steps: comparing momentary values of a triangular signal (D) with a value of the measuring signal (M) for generating a binary measurement pulse (PM); comparing momentary values of the triangular signal (D) with a predeterminable first reference variable (R1) for generating a binary reference pulse (PR) that corresponds to the measurement pulse (PM) and transmitting the measurement pulse (PM) and reference pulse (PR) at a constant phase.

Abstract: The invention relates to a method for the digital transmission of an analogue measuring signal (M), comprising the following steps: comparing momentary values of a triangular signal (D) with a value of the measuring signal (M) for generating a binary measurement pulse (PM); comparing momentary values of the triangular signal (D) with a predeterminable first reference variable (R1) for generating a binary reference pulse (PR) that corresponds to the measurement pulse (PM) and transmitting the measurement pulse (PM) and reference pulse (PR) at a constant phase.

Abstract: In order to regenerate joint defects in the human or animal body, the invention provides an implant that is placed in the joint area. Said implant is comprised of a supporting body and, in fact, is particularly comprised of a spongy bone of human or animal origin, has infiltrating channels and, in one partial area, is impregnated (cartilage) cell suspension. This suspension penetrates into the cavities of the supporting body, the number of which preferably being increased by removing fats, cells, connective tissues, vessels or the like and into which cartilage cells settle whereupon forming a new cartilage tissue.

Abstract: The invention concerns an implant consisting of a carrier material containing medical substances such as pharmaceuticals, antibiotics, cytotstatic agents, hormones or the like made out of organic matter, preferably of a biological tissue of human, animal or plant origin, which before being incubated preferably in vacuum with one or the substances, is broken up, cleaned and freeze-dried.

Abstract: An endoprosthesis for a hip joint includes an acetabular implant and a femoral implant. The acetabular implant has a socket with a socket opening intersecting the rim of the socket in a plane. At least two tubular guides for positioning at the cranial region of the bone are attached to and laterally offset from the socket opening, have axes perpendicular to the socket plane, and slidingly receive attachment screws the ends of which are threaded into the bone. The femoral implant has a spherical head movably positioned in the acetabular socket which is mounted to an attachment member the distal side of which has a conical attachment surface bearing against the resected femoral neck. A sliding rod extends coaxially with the femoral neck axis laterally and distally into a sleeve connected to a plate which is secured to the femur.

Abstract: A coating material for buildings which renders them water repellent, consisting of cement and/or lime, fillers and water, which contains as a hydrophobing additive 0.1 - 3% by weight, calculated on dry substance, of one or more water soluble esters of sacharose with fatty acids having preferably a chain length of 10-20 carbon atoms.

Abstract: This invention relates to a process for the preparation of free-flowing, lump-free redispersible synthetic resin powders by spraydrying aqueous dispersions of synthetic resins containing an added amount of a water-soluble condensation product from melamine, formaldehyde and containing sulfonate groups.