Abstract: Cutting board for abrasive material sheets, wherein they may be simultaneously measured and cut to order, comprising portable base member, grooved at measured locations, transversely thereof, in coactive relationship to at least one upright guide and to means for severing the sheet.

Abstract: A new type of engine, which incorporates rotors each equipped with a plurality of vanes and has a volume of a portion necessary for constant pressure heating expansion turned into a volume of an air motor side, is composed by functionally combining vane rotary air compressors and vane rotary air motors. More particularly, there is an engine conception mainly intended for vehicles of solving, without reducing the engine efficiency, problems concerning complete combustion and prevention of nitric oxide production, which have been generally considered it difficult to realize by reciprocating engines.

Abstract: In the medical treatment and examination of animate patients, means to flex and secure a spinal column against movement, exclusive of applying pressure to the head and/or neck, comprising coactively adjustable seat and shoulder engaging elements, arranged to flex the spinal column in an optimum posture of flexure, while simultaneously restraining the patient against movement of his spinal column. Coactive plates engaging patient's shoulders and the seat under and around the pelvis are compressed while the patient is strapped therein, whereby the vertebral column is bowed posteriorly, thus widening the inter-vertebral space for introduction of the spinal tap needle therein. The mechanism permits the patient's pelvis to be advanced anteriorly so that it is sustained in the same vertical plane as the shoulders, whereby flexion of the vertebral column is obtained, instead of leaning the patient out of vertical axis, a normal vertical or horizontal axis.

Abstract: A system for gasifying a mixture of fuel, air and recycling exhaust gases for induction into an internal combustion engine, comprising means interconnected between extant fuel pump and engine carburetor to preheat the mixture by bleeding heat from a heat generator to the flow line between pump and carburetor for preheating said flow line and of utilizing the heating media in the carburetion process and optionally secondarily heating said carbureted mixture in the generator sequentially of introduction of the preheated fuel to the carburetor.

Abstract: The invention concerns a device for automatically answering telephone calls, comprising an answering system, with a first magnetic sound recorder for recording and reproducing an answering text and a mechanical driving gear for the first magnetic sound recorder, with a storage system, which comprises a second magnetic sound recorder for recording and playing back the incoming message and a mechanical driving gear for a second magnetic sound recorder, with an action control switch and additional switches for selecting specific functions, with an electrical switching, amplifying and control system for an independent control of the work cycle of the device in its different functions, said control system comprising a mechanism for recording at least a marking signal on the first sound recorder and for the play-back of the recorded marking signal in order to switch the device from its operating condition of playing back the call answering text, to the operating condition of recording the incoming information or in