Abstract: A release mechanism for use with an explosives disposal robot having an elongated boom includes a latch member secured to an outer end of the boom, the latch member having a fixed portion and movable latch or lever members. A flexible strap extends between the lever members, with one end being attached to one of the lever members and the other end being releasably attached to the other lever member. When the other lever member is moved to a release position the other end of the strap falls from the other lever member so as to release, for example, a firing line cradled in the strap. The one lever member can be actuated by way of a remote controlled solenoid connected thereto via a flexible cable or by way of an elastic member connected thereto.

Abstract: A yarder is employed with a running skyline provided with a carriage. The running skyline has an intermediate suspended support consisting of a hanger bar with a shoe pivotally connected to the lower end of the hanger bar by a transverse shaft. The shoe has supporting sheaves and an enclosure rail, with the skyline haulback line supportingly received between the rail and the sheaves. The carriage is open on one side so as to be able to pass the transverse shaft of the intermediate suspended support. The open side of the carriage has a yieldable safety gate which allows the carriage to pass the transverse shaft but which retains the haulback line within the carriage. The lower portion of the carriage has respective sheaves for a slack pulling line and a log suspension line to which logs to be transported are connected. A mainline extends between the yarder and a junction member connected to both the slack pulling line and the log suspension line.

Abstract: Apparatus for erecting a prefabricated section building having two masts centered on either side of its foundation, the sections transported to loading areas adjacent and between each mast and the foundation. Cables connect the masts and support two independently operable trolleys between the masts, a hoist on each trolley including a cable connects via a yoke to a section in the loading area and lifts same vertically from a truck therein to at least the story being assembled, and then moves it horizontally to immediately above its ultimate location where it is lowered. A nearby operator, by remote control depending from the trolley, controls its movements to position it precisely, such control being of winches connected to cables for moving the hoist and trolleys. This operator also communicates with the ground by telephone or radio. Each mast has three stays. To raise it, it is laid out horizontally with the cables and stays positioned.