Abstract: A device to permit manual adjustment of the track or path of a conveyor belt (1) while providing constant, predetermined belt tension. A removable conveyor roller (23) is supported by a pivotable yoke (11), which is pivoted about a shaft (12) from a nonoperational position of no belt tension, at which point cleaning and regular maintenance take place, to the operating position of full belt tension. Conveyor belt tension is provided by at least one spring (10), the spring force increasing with deflection during the pivoting motion of the roller yoke (11) into the normal operating position. The spring force resists the motion of a pivoting plate (8) to slide in a plane relative to the fixed conveyor bed (18) along an adjustable axis. Force is transmitted through the pivoting shaft (12) to the yoke (11) which creates tension in the conveyor belt (1) without exceeding the load limitations of the conveyor belt (1) or the roller shaft (9) bearings.

Abstract: A method and apparatus for in situ drilling of a precise hole in an erected structural element and inserting in such hole in pressed-fit relationship a cylindrical strain gauge. A guide block is provided having a precision hole corresponding to the diameter of the hole desired in the structural element. The guide block has unthreaded bolt holes for attachment of the guide block to the structural element and guides a reamer to produce a precise hole in the structural element. The guide block also has threaded holes for advancing a push plate against a force-transmitting bushing which is insertable through the precision hole in the guide block into abutting relationship with an end face of a cylindrical strain gauge to force the gage into press-fit relationship with the precise hole in the erected structural element.

Abstract: A method and apparatus for in situ drilling of a precise hole in an erected structural element and inserting in such hole in pressed-fit relationship a cylindrical strain gauge. A guide block is provided having a precision hole corresponding to the diameter of the hole desired in the structural element. The guide block has unthreaded bolt holes for attachment of the guide block to the structural element and guides a reamer to produce a precise hole in the structural element. The guide block also has threaded holes for advancing a push plate against a force-transmitting bushing which is insertable through the precision hole in the guide block into abutting relationship with an end face of a cylindrical strain gauge to force the gage into press-fit relationship with the precise hole in the erected structural element.