Abstract: A process (10) for at least partially removing hydrogen cyanide from synthesis gas includes feeding a synthesis gas (30) containing hydrogen cyanide to a gas-liquid contacting stage (18) and, in the gas-liquid contacting stage (18), contacting the synthesis gas with an aqueous washing solution (36) comprising at least one dissolved metal salt, with metal cations of the metal salt being capable of forming metal cyanide complexes and/or metal cyanide precipitates, and weak acid anions of the metal salt serving to buffer the pH of the washing solution in a range between 6 and 10. Hydrogen cyanide is washed from the synthesis gas by the washing solution to form a treated synthesis gas (38) and a spent washing solution (40). From time to time or continuously, at least a portion of the spent washing solution is withdrawn from the gas-liquid contacting stage. The treated synthesis gas (38) is also withdrawn from the gas-liquid contacting stage.

Abstract: For indicating relative rotational displacement between a fixed first member, such as a stud (20) on a wheel hub, and a second member, such as a wheel nut (22), which is rotatably engaged with the first member, a safety device (24) comprises a body (26) having a bore formed with equispaced grooves enabling the device to be releasably secured to the second member (22) in one position of a plurality of positions and having indicating means, such as a pointer (28), to indicate the position of the device (24) relative to a reference, such as a mark (32) on the rim (16) covering the wheel hub (14). The bore within the body (26) is closed at one end, e.g. by bevelled top wall (36), so that the body additionally serves as a dust cap for the conjoined first and second members (20, 22).

Abstract: In order to provide a visible indication of loosening of a nut or a bolt relative to another member to which it is threadably engaged, a rotation indicator assembly comprises a first element, which is permanently secured to the nut or bolt and a second element which is adapted to be releasably and non-rotatably mounted in or on the first element, e.g. by interengagement with teeth in any chosen rotational position, and incorporates means, such as pointer, for indicating its rotational position relative to a fixed reference. The first element may take the form of an insert, an integral formation, or an external fitment. The fixed reference may be provided by an independently mounted marker secured by the nut or bolt.

Abstract: For indicating relative rotational displacement between a fixed first member, such as a stud (20) on a wheel hub, and a second member, such as a wheel nut (22), which is rotatably engaged with the first member, a safety device (24) comprises a body (26) having a bore formed with equispaced grooves enabling the device to be releasably secured to the second member (22) in one position of a plurality of positions and having indicating means, such as a pointer (28), to indicate the position of the device (24) relative to a reference, such as a mark (32) on the rim (16) covering the wheel hub (14). The bore within the body (26) is closed at one end, e.g. by bevelled top wall (36), so that the body additionally serves as a dust cap for the conjoined first and second members (20, 22).

Abstract: For indicating relative rotational displacement between a fixed first member, such as a stud (20) on a wheel hub, and a second member, such as a wheel nut (22), which is rotatably engaged with the first member, a safety device (24) comprises a body (26) having a bore formed with equispaced grooves enabling the device to be releasably secured to the second member (22) in one position of a plurality of positions and having indicating means, such as a pointer (28), to indicate the position of the device (24) relative to a reference, such as a mark (32) on the rim (16) covering the wheel hub (14). The bore within the body (26) is closed at one end, e.g. by bevelled top wall (36), so that the body additionally serves as a dust cap for the conjoined first and second members (20, 22).