Abstract: An electric control circuit of an electromagnetic clutch includes a relay-controlled, two-position switch which operates, in response to a power source being disconnected from the switch relay and the clutch, to establish a path to ground through which the induced voltage of the clutch may be dissipated to thereby speed up the disengagement of the clutch once power thereto is discontinued. The control circuit may be that employed in a self-propelled forage harvester equipped with a metal detector, the latter including a normally closed relay switch which opens in response to metal being sensed to thereby de-energize the clutch and two-position switch relay.

Abstract: Compounds of formula V, ##STR1## wherein R is unsubstituted C.sub.6 -C.sub.14 aryl or C.sub.6 -C.sub.14 aryl which is substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthiol, phenyl, benzyl, --CN, --CF.sub.3, halogen or --COOR.sub.5, and R.sub.5 is H, C.sub.1 -C.sub.18 alkyl, cyclohexyl, cyclopentyl, phenyl, C.sub.1 -C.sub.12 alkylphenyl, benzyl or C.sub.1 -C.sub.12 alkylbenzyl, and at least one of the substituents R.sub.1 to R.sub.4 is an organic thiol, sulfoxyl or sulfonyl group, and the other members R.sub.1 to R.sub.4 are H, F, Cl or Br, are reversible photochromic systems which can be used for contrast formation or light absorption.

Abstract: A moisture-proof coupling, which is simple in design and easy to assemble, is disposed between a motor housing and a bearing plate, with the electrical leads running out through the moisture-proof coupling. The electrical leads are integrally molded in an insulated lead-insert, which can be inserted into an opening on the end face of the bearing plate. A circumferential sealing ring is molded on the insulated lead-insert. The sealing ring is injection-molded together with the lead-insert on a brush plate so that it can be pre-positioned and, when the motor is assembled, can be pressed between the motor housing and the bearing plate to form a seal. The brush plate can be fixed together with the lead-insert and the sealing ring in the bearing plate in the manner of a pre-assembled component.

Abstract: An elastic engine mount includes upper and lower bearing plates. A hollow-cylindrical spring block has top and bottom ends being clamped between the bearing plates and defining an inner space. A bolt protrudes into the inner space from the upper bearing plate. The spring block is formed of an elastomer and has conduits formed therein with at least one open end and a varying cross section. The conduits are disposed in a plurality of planes and are mutually parallel within each respective plane. A transverse elastic wall for additional damping is centrally fixed to the bolt for dividing the inner space into two liquid-filled chambers. The elastic wall has through openings formed therein and has an outer periphery clamped between the lower bearing plate and the bottom end of the spring block.

Abstract: Compounds of the formula I or V, or mixtures thereof, ##STR1## wherein R is unsubstituted C.sub.6 -C.sub.14 aryl or C.sub.6 -C.sub.14 aryl which is substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthio, phenyl, benzyl, --CN, --CF.sub.3, halogen or --COOR.sub.5, and R.sub.5 is H, C.sub.16 l-C.sub.18 alkyl, cyclohexyl, cyclopentyl, phenyl, C.sub.1 -C.sub.12 alkylphenyl, benzyl or C.sub.1 -C.sub.12 alkylbenzyl, and at least one of the substituents R.sub.1 to R.sub.4 is an organic thio, sulfoxyl or sulfonyl group, and the other members R.sub.1 to R.sub.4 are H, F, Cl or Br, are reversible photochromic systems which can be used for contrast formation or light absorption.

Abstract: An electrical control box, particularly for low-voltage systems, includes an interior defining a compartment. At least one stationary counterpart contact and a counterpart element are disposed in the compartment. At least one drawer preferably being elongated rectangularly in the vertical direction is to be inserted into the compartment for holding electrical and/or electronic components for switching, controlling and the like. The at least one drawer has a back to be located in the interior and a bottom. Rollers are disposed on the bottom. At least one contact location is disposed on the back for respectively contacting the at least one stationary counterpart contact.

Abstract: Compounds of formula I or V, or mixtures thereof, ##STR1## wherein R is unsubstituted C.sub.6 -C.sub.14 aryl or C.sub.6 -C.sub.14 aryl which is substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthiol, phenyl, benzyl, --CN,--CF.sub.3, halogen or --COOR.sub.5, and R.sub.5 is H, C.sub.1 -C.sub.18 alkyl, cyclohexyl, cyclopentyl, phenyl, C.sub.1 -C.sub.12 alkylphenyl, benzyl or C.sub.1 -C.sub.12 alkylbenzyl, and at least one of the substituents R.sub.1 to R.sub.4 is an organic thiol, sulfoxyl or sulfonyl group, and the other members R.sub.1 to R.sub.4 are H, F, Cl or Br, are reversible photochromic systems which can be used for contrast formation or light absorption.

Abstract: Compositions of a) thermosetting plastics or thermoplastics, and a mixture of such plastics, and b) a superconducting compound having a transition temperature T.sub.c of at least 20 K are suitable as moulding materials for the production of articles for magnetic screening of static magnetic fields and for transmitting of magnetic and electrical forces.

Abstract: A motor connector line (2) leads to the outside from the brush plate (5) through a duct in the motor housing (1) in an electric motor, especially a commutator motor, to a supply and/or control line via a plug connector. In order to do so in a simple manner, the outer end of the motor connector line (2) is connected with a plastic connector fixed plug (4), which is held by a pot-shaped plastic cover cap (3), which is set onto one end of the motor housing (1) and can be fixed in place on the latter in its end operating position.

Abstract: A rotation detector has a one-piece universal brush rocker that includes a supporting body that is injection molded, particularly out of plastic. The measuring coil is held on the supporting body between the pole gaps of pole units on the stator side and the measuring coil's winding ends connected to the stripped ends of the brush shunts are cast in the universal brush rocker. This rotation detector guarantees a contacting between the winding ends of the measuring coil and the brush shunts retained on the brush rocker of the commutator motor, and features ease of assembly and lasting operational reliability.

Abstract: A method of laser marking plastics objects of any desired shape, wherein the object to be marked contains a radiation-sensitive additive which effects a change in the light reflectance and is subjected to a laser with pulsed light such that the laser beam is deflected through a mask or directed over the surface of the object to be marked, in conformity with the shape of the marking which is to be applied so as to form a visual effect marking at the areas of impact on said object without the surface of said object suffering damage which is visible to the eye. The method includes using molybdenum disulfide as additive and choosing the laser parameters of wavelength, pulse content and pulse duration such that an effect marking is produced whose contrast undergoes visual change depending on the angle of light and observation.

Abstract: A method of laser marking ceramic materials, glazes, glass ceramics and glasses of any desired form, which comprises applying to the material to be marked a 100 to 10,000 .ANG. thick transparent layer of titanium dioxide, then irradiating said oxide layer with a pulsed laser such that the radiation is directed onto said layer in accordance with the form of the marking to be applied, and using laser light of a wavelength which is sufficiently absorbed by the oxide layer, so that a discolouration of said oxide layer is produced at the irradiated areas.

Abstract: A portable ion generator has a housing with a high tension source therein. The high tension source has two output connections of which one is electrically conductively connected to a high voltage needle electrode while the other is electrically conductively connected to a counterelectrode disposed around the needle electrode. So that the housing of the generator can be worn without being obtrusively visible, without adversely affecting operation of the electrodes, the needle electrode and the counterelectrode are carried by a relatively small carrier member and connected to the high tension source by means of flexible electrical conductor elements. The ion generator has a contact element which is at the potential of the counterelectrode and which may be provided on the housing and/or the carrier member.

Abstract: A hydraulic-damping engine mount includes a working chamber, a frustoconical elastomeric support spring surrounding the working chamber, a compensating chamber, and a soft-elastic cup-shaped diaphragm bordering the compensating chamber. A partition is disposed between the chambers. The circular-annular overflow conduit through which the chambers hydraulically communicate with each another has a substantially rectangular cross section and is in the vicinity of the partition. At least one rib-like intermediate wall inside the overflow conduit extends in the circumferential direction and extends vertically over a portion of the height of the overflow conduit.

Abstract: A hydraulic-damping two-chamber engine mount includes a working chamber facing toward an engine, a compensating chamber, and an intermediate plate separating the chambers from each other and having an overflow conduit extending helically therein through which the chambers communicate hydraulically with one another. The intermediate plate has two sides and an outer periphery merging into a cylindrical ring extending beyond both of the sides. The ring has an outer surface with two axially superposed conduits formed therein having ends and extending over at least a portion of the outer periphery of the intermediate plate. The intermediate plate has a longitudinal axis and has a conduit portion formed therein extending obliquely relative to the longitudinal axis through which one end of each of the superposed conduits communicate with each other. An outer conduit wall in the form of a cylindrical mount housing has an inner wall surface covering the superposed conduits.

Abstract: A method and arrangement for exchanging a variable number of tool holders in which only one tool holder at a time is brought into working position. The operations involved with accessing a variety of holders, one at a time, to a working position requires movement of minimum mass to the working position adjacent the drive unit--while one or more remaining tool holders are located in a series of accessible independent storage positions or in at least one storage magazine.

Abstract: A manually operating plug and socket joint for multiple hose connections, particularly measuring, control or regulating lines of fluid systems with very high (several hundred bar), reduced or alternating pressure. The plug and the socket have a housing with axially parallel bores receiving a joining bushing with a radial clearance. A spring loaded and mechanically actuable check valve with a cylindrical valve body is arranged in each joining bushing. The valve body outer edge or frontal face sealing shoulder presses against an elastomeric gasket. The joining bushing or a sealing bush located in the bushing and the gasket define a sealable flow channel. Each mechanically actuable plug piece check valve contains a shackled flying piston with a passage bore. The piston outlet nipple opens the cylindrical valve body of the associated socket piece mechanically actuable check valve. The piston inlet nipple opens the cylindrial valve body of the plug piece mechanically actuable check valve.

Abstract: A hydraulic-damping engine mount includes a working chamber having a given diameter and a compensating chamber. A rigid intermediate plate is disposed between the chambers. A conical jacket-like rubber-elastic wall has relatively smaller and larger diameter ends. A metal bearing plate is disposed at the smaller diameter end and at least partly defines the working chamber along with the intermediate plate and the wall. The intermediate plate has an overflow opening formed therein interconnecting the chambers. A rigid plate in the form of a circular disk has a diameter smaller than the given diameter. The rigid plate is disposed in the working chamber parallel to the intermediate plate and is rigidly connected to the bearing plate.

Abstract: A sensor for fluid systems for continuous detection of operating pressures and temperatures, with a sensor housing to receive a temperature probe and a pressure sensor. Simultaneous detection of pressures and temperatures is achieved by a sensor housing having a connecting nipple equipped with a bore. A temperature probe passes through the bore forming an annular flow channel which is fluidically connected to a pressure sensor chamber of a pressure sensor. The temperature probe is adjustable in an axial direction by an adjusting device.

Abstract: A high, reduced or alternating pressure fluid measuring system equipped with lines connected to measuring, control or regulating points combined in a collector. The collector is a rapid, multiple coupling and is actuable under operating pressures. The plug or socket is connected to a measuring device with sensors, control or regulating devices. The measuring device has a housing with plural bores, each to receive a pressure transducer and connected to a fluid and a vent channel. The fluid channel leads to a coupling bushing. The plug and socket housing have axially parallel bores to receive a coupling bushing, each with a radial clearance. A spring loaded mechanically actuated check valve and cylindrical valve body is located in each bushing. The outer edge or frontal surface of a bushing sealing shoulder presses against a gasket when closed. The coupling bushing or sealing bush located in the coupling bushing and the gasket form a sealable flow channel.