Abstract: A coil spring making machine wherein the advancing rolls for the wire are driven intermittently by a transmission which receives motion from a timing shaft through the medium of a reciprocable input element and two one-way clutches so simultaneously that the rolls rotate in opposite directions (one clockwise, the other counter clockwise). The knife which severs the wire at intervals so as to separate successive coil springs is driven by the timing shaft through the medium of a chain transmission and a link which causes the knife to travel along an endless circular path and to sever the wire while the advancing rolls are at, or close to, a standstill.

Abstract: A spring coiling machine wherein the wire is fed lengthwise and is acted upon by a tool receiving motion from two coaxial rotary disc cams through the medium of follower levers which track the respective cams. One of the cams controls the position of the tool during the initial stage or stages and the other cam controls the position of the tool during the remaining stage or stages of the making of each of a series of springs. The angular position of each cam with reference to the other cam is adjustable to thereby change the timing of transmission of motion from the adjusted cam to the tool during each cycle of the machine. The positions of the follower levers with reference to the associated cams are also adjustable to thereby vary the extent of movement of the tool during each cycle.

Abstract: A grinding machine with two spaced-apart coaxial grinding wheels wherein the workpieces are transported through the space between the neighboring parallel active surfaces of the grinding wheels. A gauge monitors the length of workpieces which issue from the space and closes a microswitch when the monitored length of workpieces reaches a predetermined value which is close to or equals the upper limit of the acceptable range of lengths. The microswitch completes a circuit which causes a motor for one of the grinding wheels to move the one grinding wheel nearer to the other grinding wheel. The distance between the active surface of the other grinding wheel and a fixed reference point in the space between the wheels is monitored by a transducer which causes a motor for the other grinding wheel to move the latter toward the one grinding wheel when the aforementioned distance reaches a preselected maximum permissible value while the gauge closes the microswitch.

Abstract: Apparatus for heating coil springs or other metallic commodities has a furnace defining a chamber for one or more upright cylindrical supports which form part of a conveyor system for moving an endless chain or band lengthwise so that successive holders of a series of equidistant holders for coil springs on the chain or band advance through the chamber. The chain or band is trained around the cylindrical support or supports in such a way that it forms at least one helix during travel through the chamber, and around one or more pulleys or sprocket wheels located outside of the chamber and being driven by a variable-speed motor. The helical configuration of the chain or band portion in the chamber of the furnace lengthens that portion of the path for the holders which is located in the chamber and thus prolongs the intervals of dwell of successive springs in the furnace.

Abstract: A machine for grinding objects, especially helical-or coil-type springs whose opposite ends are to be ground, includes a pair of rotary grinding discs having grinding surfaces spaced in axial direction from each other so as to define a work station. A plate-shaped element having a region mounted for turning movement relative to the work station intermediate the grinding surfaces is formed with a plurality of apertures, each of which is adapted to receive an object which is to be ground by contact with the grinding surfaces. Channels are provided in the plate-shaped element and connect the apertures with a source of fluid for supplying the latter to the apertures.