Abstract: A freezing apparatus for liquid-filled pipelines (3, 5) uses a vaporizable refrigerant conducted in a circuit through a hose (13) with an internal capillary line (14). The apparatus has a contact body (1) with a contact surface (2) for the pipeline (3, 5) or for an adapter (4) and expansion chambers (6, 7) for the evaporation of the refrigerant. To improve the ease of handling and the thermal efficiency by making it possible for the temperature to be measured very close to the apparatus, the hose (13) is attached to the contact body (1) in the direction normal to a surface line of the contact surface (13). The contact body (1), furthermore, has a projection (16) at the side of the contact surface (2), this projection carrying a thermally insulated clamping spindle (17) for attaching the contact body (1) to the pipeline (3, 5). The spindle in turn contains a temperature sensor (20, 20a).

Abstract: The present invention is directed to a torque wrench wherein a head comprises an engaging member capable of being coupled, antirotationally, with a screw or the like. A handle lever is movable within limits relative to the engaging member and a load sensor is provided between the engaging member and the handle lever and controls an indicating means. The load sensor according to the present invention is a piezoelectric member fitted with electrodes connected with the input of an electric amplifier which is fed by a battery housed in the handle lever. The electric amplifier controls an electronic indicator which indicates the torque applied to a screw or the like.