Reversible vibrator, bowl feeder with angled spring supports

In a vibratory parts feeder including a generally circular base flexibly supported on a massive mounting plate by a plurality of leaf spring members extending angularly upward from said mounting plate and arranged in a circular symmetrical array about the axis of said base, an electromagnetic motor mounted on said mounting plate, an armature mounted on the bottom of said base and in operative relationship with said electromagnetic motor, alternating current supply means connected to said electromagnetic motor and a feeder bowl with an upwardly inclined spiral ramp formed therein, the improvement which comprises:

• first reversible means for connecting the upper ends of said leaf spring members to said base at symmetrically spaced locations around the circumference of said base,
• said first reversible means comprising, for each leaf spring member, and upper mounting block secured to said circular base, said upper mounting block being adjustable relative to said base about a horizontal axis extending radially outward from said base whereby said block may be adjusted to correspond to the angle of inclination of its respective leaf spring member and may be positioned to accommodate a reverse angle of inclination of its respective leaf spring member,
• each leaf spring member being connected to its respective upper mounting block by a single threaded fastener to permit a natural unstressed securing of each leaf spring member to its respective block before said threaded fastener is tightened down, and
• second reversible means for connecting the lower ends of said leaf spring members to said mounting plate,
• said second reversible means comprising for each leaf spring member, a lower mounting block secured to said mounting plate and having a surface beveled at an angle relative to said mounting plate that conforms to the desired angle of inclination of said leaf spring member, said lower mounting block being adapted for pivotal adjustment about a vertical axis to conform to the orientation of its respective leaf spring member and to accommodate a reverse angle of inclination of its respective leaf spring member,
• each leaf spring member being secured against said beveled surface of its respective lower mounting block by a single threaded fastener to permit a natural unstressed securing of each leaf spring member to its respective lower mounting block before said threaded fastener is tightened down,
• said second means being spaced closer to said axis of said base than said first means whereby the lower ends of said leaf spring members are spaced radially inwardly of the upper ends thereof and said leaf spring members extend angularly upwardly and outwardly relative to said axis of said base as well as angularly in a tangential plane relative to said base.