Abstract: An electric precipitator has a plurality of parallel, longitudinally straight and throughoing, and transversely spaced longitudinal main beams, respective parallel, planar, and transversely spaced longitudinal main plates suspended from the beams, a plurality of parallel and longitudinally spaced cross plates extending generally orthogonally between the main plates and defining corners therewith, and respective oblique webs in the corners and each extending at about 45.degree. from the respective cross plate to the respective main plate. Thus the plates and webs together define octagonal-section passages. Respective electrodes extend centrally in the cells and, due to the octagonal section of these cells, there are no dead corners and, in fact, charge concentration is more uniform than in the hexagonal-section systems.

Abstract: A crimper for crimping terminals of electrical conductors includes upper and lower elongated members pivoted to one another and having rear handle portions. A first crimping component is provided anterior to the pivot point of the elongated members and includes a first press member formed on the lower elongated member and a first stepped recess formed on the upper elongated member. A second crimping compenent is provided posterior to the pivot point and includes a second press member and a second stepped recess respectively formed on the upper and lower elongated members. Both first and second press members are attached pivotally to the lower and upper elongated member so that the press members can be guided easily into the stepped recesses to effect crimping operations.