Abstract: A centering device is provided in a spring core mounting machine having at least one pair of clamping jaws for holding together the terminal windings of adjacent helical springs while they are being connected by threading wire helices through them, with the terminal windings of the helical springs being provided at two diametrically oppositely located portions with bent-out zones in which the spring wire extends at least approximately in a straight line and in parallelism with the opposite zone. A slide is provided which is movable in axial direction and which engages the respectively newly supplied spring at its terminal winding and presses it against the movable clamping jaw.

Abstract: A method and apparatus for separating helical springs with knots at their coil ends, for mattress spring frames, in which the springs are moved upright and entangled in sliding guides by a conveyor belt against a stop. The lower coil end of the springs touching the stop is grasped by a gripping member. The stop is moved to an inactive position and the gripping member pulls the grasped coil end from the sliding guide by an amount equivalent to spring wire thickness. Then the stop returns to its active position and the gripping member pivots the spring by 90.degree. into a lying position where the far end of the coil is grasped by a spring turning member. The gripping member releases the spring and returns to the starting position. Then the spring turning member rotates the spring until the knot touches a stop. After release, the spring is grasped by another gripping member and passed on to the spring frame assembly machine.

Abstract: A metering and conveyor arrangement for liquids to be mixed, in which several parallel-connected delivery pumps are actuated by a drive unit. Each liquid is assigned to a pair of delivery pumps. Each pair consists of two piston pumps alternately performing an intake and a discharge cycle. The pumps are moveable relative to each other, as well as perpendicular to the piston rods. A swivel element is joined to the drive unit, and rocker arms are located on both sides. Each of the rocker arms is connected with one of the piston pumps of a pair, and the ends of the piston rods are located and guided in grooves of the rocker arms. Each pair of the piston pumps is regulated by an adjustment spindle which is common to one pair of piston pumps. The adjustment spindle has two parts with opposite threads. They are connected by a lockable coupling. One spindle part is each associated with one piston pump of one pair.