Abstract: A method of and apparatus for controlling forming press conditions aids in maintaining stability in a mechanical double action press forming provided with an upper die (inner) and an outer ram (outer). These dies are driven independently wherein press conditions related to the forming process, such as a hydraulic pressure and pneumatic pressure, are automatically corrected by feedback so as to be maintained to preset values corresponding to the change of the inner stroke during the forming process. Abnormal operation can also be detected and corrected immediately by detecting the change of the press conditions during the forming process continuously or intermittently.

Abstract: A discharge wire cleaning device for an electric dust collector in which when the dust accumulates to a certain extent on the discharge wires which are arranged vertically with each end secured to the frame, the compressed gas is ejected from the gas nozzle at the base of the discharge wires to apply pressure to the skirt and drive it upwardly thereby removing the dust on the discharge wires, after which the sliders are allowed to move down by gravity to their lowest portion. A damper may be provided on the upper portion of each discharge wire so that the slider is urged downwardly against the friction of the dust still remaining on the wire and can be moved up and down repeatedly. A brush may be provided on the slider so that the dust is effectively scraped off the discharge wires.

Abstract: A collapsible steering mechanism is structured with a pair of telescopically interfitting support tubes having a shock absorbing tube located coaxially therebetween. A plurality of bearing balls are provided on both ends of the shock absorbing tube for engagement between the support tubes with the diameter of the bearing balls being larger than the wall thickness of the shock absorbing tube to enable desired collapse of the support tubes when an impact force is applied thereto.