Abstract: An apparatus for crimping the ends of flexible pipe sections is adapted for mounting on a machine for winding flexible pipe from steel bands. The pipe forming machine includes multiple pairs of roller dies for profiling a flat metal band to a configuration with flanges on leading and trailing edges of the band. The profiled band is wound on a mandrel and the adjacent flanges of respective bindings interlock as the profiled band is spiral-wound on the mandrel. The crimping apparatus is mounted upstream of the mandrel and receives the profiled band. The crimping apparatus includes a pair of roller arm assemblies each mounting a roller die. The roller arm assemblies are interconnected by a toggle linkage mechanism which is connected to a linear actuator for moving the roller arm assemblies between engaged positions for compressing the flanges to non-interlocking configurations and disengaged positions.

Abstract: A resonator assembly having a base and a cap provided with cooperating notch and projecting terminal retainer structure serving to retain the terminals of the spring contacts in centered disposition within the assembly and further serving to retain the cap to the base in assembled disposition. The notches are caused to have a width slightly greater than that of the terminals to permit facilitated inward movement of the terminals into the notches in the assembly procedure. The base is further provided with at least one securing recess and the cap is provided with a corresponding number of securing projections fitted one each into each securing recess for further securing the cap to the base. The sidewall of the base may be enlarged to accommodate the securing recesses therein.