Abstract: A method for producing a base body of a valve housing for a hydraulic control valve includes machining a front-side section of a control edge into an unmachined base body for the base body with a cutting process in a front-side machining step. In the cutting process, a cutting tool is guided from a coupling side through a machining valve pocket to the front-side section of the control edge.

Abstract: A method for producing a base body of a valve housing for a hydraulic control valve includes machining a front-side section of a control edge into an unmachined base body for the base body with a cutting process in a front-side machining step. In the cutting process, a cutting tool is guided from a coupling side through a machining valve pocket to the front-side section of the control edge.

Abstract: A sealed rolling bearing has at least one bearing ring with an end surface extending radially thereabout and supporting a support surface that may be positioned to engage the end surface. At least one annular groove is provided in either the support or end surface, having a groove bottom in which an axially compressible sealing ring is assembled. The sealing ring is axially and circumferentially yielding and is arranged either against a radially inner groove wall inclined to extend radially inwardly the groove bottom, or against a radially outer groove wall inclined to extend radially outwardly to the groove bottom.

Abstract: A roller bearing assembly comprising inner and outer rings having an annular space therebetween, a plurality of rolling elements in the annular space, a cage for guiding the rolling elements, a retaining element mounted on one of the rings and having flexible projections to snap fit with complementary surfaces of the cage whereby the one ring is connected through the cage to the retaining element.

Abstract: A parts handling device is provided having a movable carrier on which is disposed a plurality of coil wound magnet poles. At least one of the poles is wound and with an A.C. source so that its current or voltage is subject to changes in response to induced magnetic flux caused by its proximity to a ferro-magnetic material. The changes in current or voltage so induced is sensed by a low impedance device or a resonant circuit device and an electric signal is produced which is employed to convert said poles to D.C. excitement control the operation of the parts handling device.

Abstract: A permanent magnet with a split magnetic flux conductor between the pole shoes serves to attract a magnetizable load to the pole shoes of an electromagnet whose pole shoes constitute extensions of the pole shoes of the permanent magnet and whose split magnetic flux conductor extends between the respective pole shoes in parallel with the other conductor. An armature is movable into the gap between the parts of the magnetic flux conductor of the permanent magnet or between the parts of the magnetic conductor of the electromagnet by a fluid-operated motor or by the application of d-c current of proper polarity to the exciting coils of the electromagnet. The permanent magnet ceases to attract the load to the pole shoes of the electromagnet when the armature is moved into the gap between the portions of the magnetic flux conductor of the electromagnet.

Abstract: A single or composite lifting electromagnet has several cores whose poles can attract round, elongated or otherwise configurated ferromagnetic objects. The cores are surrounded by and/or flank discrete sensors in the form of Hall generators or induction coils which are provided in addition to exciting coils for the cores. The sensors are disposed centrally of or mirror symmetrically around the center of the electromagnet, and the purpose of the sensors is to generate signals in response to changes of the electromagnetic field to thereby facilitate automatic guidance of the electromagnet toward an optimum position with reference to an object which is to be lifted and transported, e.g., to the treating station of a machine tool.

Abstract: A lifting electromagnet for ferromagnetic workpieces has two composite cores which extend downwardly from a yoke. Each core has a first section which is rigid with the yoke and is surrounded by an exciting coil, a second section which is connected with the respective first section, and at least one third section which is movable with reference to the second section, either up or down or horizontally. The poles at the lower ends of the third sections make an angle of 120 degrees, the same as the poles at the lower ends of the second sections. The second sections are surrounded by induction coils, and a further induction coil is disposed between each pair of neighboring third sections. The distance between the second sections is less than the distance between the first sections, and the distance between the second sections exceeds the distance between each pair of third sections.

Abstract: A device for removing a plurality of ferromagnetic, stacked or dumped, workpieces from a container incorporates a switchable magnetic holder which can be moved up and down by means of a hoisting apparatus and, moreover, can be shifted in an approximately horizontal plane and positioned over the said container and a conveyor respectively. The magnetic holder takes the form of a magnet carrier plate mounting a plurality of holding magnets of which at least one is an a.c. magnet. Means are provided for gradually reducing the excitation of the holding magnet while the material handled is being dropped.