Abstract: A thruster system for use in a spacecraft combines chemical and electric or electrothermal propulsion. To that end a thruster may comprise a cavity including at least one inlet to receive a first fluid and a second fluid configured to chemically react with the first fluid within the cavity to generate a reaction product. Alternatively, the cavity may be configured to receive a monopropellant configured to chemically decompose within the cavity. The thruster system further comprises an energy source coupled to the cavity and configured to heat or ionize material within the cavity by emitting electromagnetic radiation. Still further, the thruster system comprises a nozzle provided at one end of the cavity and configured to direct heated material out of the cavity to generate thrust.

Abstract: A device and a method for testing tablets are disclosed. The device for testing tablets includes a test chamber, which has a crusher jaw and, lying opposite the latter, a counter-jaw. The device has a movable sheet metal strip, which is designed to position a tablet for testing. The longitudinal axis of the movable sheet metal strip is at an angle of less than 90° to the longitudinal axis of the direction of movement of the crusher jaw, and the direction of movement of the sheet metal strip corresponds to the longitudinal axis of the sheet metal strip.

Abstract: A device and a method for testing tablets are disclosed. The device for testing tablets includes a test chamber, which has a crusher jaw and, lying opposite the latter, a counter-jaw. The device has a movable sheet metal strip, which is designed to position a tablet for testing. The longitudinal axis of the movable sheet metal strip is at an angle of less than 90° to the longitudinal axis of the direction of movement of the crusher jaw, and the direction of movement of the sheet metal strip corresponds to the longitudinal axis of the sheet metal strip.

Abstract: A process for the distillation of vinylaromatic monomers in the presence of 4-tert-butylcatechol (TBC) and oxygen, wherein no aromatic nitro or amino compound is present in any effective amount. The process is particularly suitable for destabilizing and purifying styrene which has been stabilized with 4-tert-butylcatechol (TBC) for transportation.

Abstract: A process for the distillation of vinylaromatic monomers in the presence of 4-tert-butylcatechol (TBC) and oxygen, wherein no aromatic nitro or amino compound is present in any effective amount. The process is particularly suitable for destabilizing and purifying styrene which has been stabilized with 4-tert-butylcatechol (TBC) for transportation.

Abstract: In an inking system of a rotogravure printing press there are included an ink reservoir, an ink doctor blade device and an ink catch reservoir. All of these components of the inking system are height-adjustable with respect to the formed cylinder of the printing machine.

Abstract: The object of the invention is a driver restraint device for an industrial truck, whereby the driver restraint device has a pivoting bar. The invention teaches that the bar can be pivoted by an operator as desired between an inoperative position and a restraining position, and can be locked in the restraining position and unlocked from the restraining position. In one configuration of the invention, there is at least one control element and/or at least one indicator or display element on the bar. In an additional configuration, a parking brake of the industrial truck can be released as a function of the rotational position of the bar.

Abstract: A bearing assembly for a rotary printing press cylinder supports a journal of the cylinder using a plurality of support rollers. At least one of the cylinder journal support rollers is moveable so that the cylinder will either be supported or can be removed from the printing press.

Abstract: In a rotary rotogravure printing press for accomplishing the multicolor printing of first and second sides of a material to be printed, first side printing units and second side printing units are arranged in an alternating form. Dryers are located between the alternating first and second material side printing units, which may be configured as tower printing units.

Abstract: A frame for a scoop loader, fork lift or like vehicle is provided having two lateral carriers whose lower sections are bent to the middle of the vehicle and connected to form a trough like frame that is open upward and adapted to be closed toward its rear by a counterweight connected thereto, a bearing half for supporting a wheel shaft located at the front of each lateral carrier and a pair of mating bearing halves on a separate connector component constituting a front cross piece for the frame and fastener means for connecting the bearing halves to form a complete assembly.

Abstract: A conveyor is composed of a series of L-shaped sections arranged end-to-end to define a conveying floor surface with a side wall at one side opposite the mineral face so as to allow material to fall onto the floor surface. The side wall has a slot or gap therein through which extends entrainment devices capable of extending across the floor surface or being stowed inwards towards the side wall. Where the conveyor is constructed as a shuttle conveyor the entrainment devices are allowed to pivot automatically between these alternate positions as they are driven back and forth along the floor surface by a reciprocating traction means. The traction means runs outside the side wall and the devices are pivotably mounted to the traction means which preferably also performs a guide function.

Abstract: A mine working machine employs a main drive transmission with a vertical driven output shaft carrying a gearwheel which can be interchanged with a chain wheel for effecting a chain drive. For a chainless drive, an auxiliary transmission with a housing covering the gearwheel is attached to the machine body or the housing of the main drive transmission. The auxiliary transmission employs rotatable upstanding shafts located at the goaf side of the machine and in the auxiliary housing. The shafts carry gearwheels at their upper ends meshing with the driven gear wheel and pinions at their lower ends meshing with a multi-part rack extending along the path of movement of the machine.

Abstract: Apparatus for loading material onto a conveyor in a mine working comprises two similar bodies interconnected through a short chain and supported for movement along a guide means at one side of the conveyor. Each body has a shaped base member engaging on the guide means and connected through a plate extending beneath the guide means to a drive chain. This base member has an inclined loading surface extending downwardly towards the floor of the working and in the direction of movement. Additional similarly shaped complementary members can be secured side-by-side with the base members to produce composite loading surfaces of any desired width. Attachments with blades resembling plough shares can be secured to the base members to define a guide surface cooperating with the loading surface to direct material into the conveyor and a number of attachments can be built up one upon another to provide a composite guide surface of any desired height.

Abstract: A longwall conveyor composed of channel sections arranged end-to-end and a scraper-chain assembly moved to transfer material along the channel sections has a main drive station at one end and an auxiliary drive station at the other end. Each drive station has a frame rotatably supporting a drum around which is entrained the scraper-chain assembly. Drive motor and gearing units are carried by the frames and drive the drums. At each drive station there is a housing in which a sprocket wheel drivably engages with a chain used to haul a plough or a similar machine along the conveyor. Drive motor and gearing units are supported by the housings and drive the sprocket wheels. The housing and sprocket wheel at the main drive station is slidably mounted on the frame and a piston and cylinder unit effects slidable displacement of the housing to vary the tension in the drive chain.

Abstract: A scraper-chain conveyor for transporting material at a mine face working has a series of pans and a screen used to screen-off the working zone carried by the sides of the pans remote from the face. The screen is composed of sections with two sections being allocated to each pan. Each screen section is composed of a lower wall secured through U-shaped springs to pivot pins permitting the whole section to be swung outwards of the face to a collapsed position. The pins extend through the bights of the springs and an upper wall is received for slidable movement between the arms of the springs. The upper walls can thus be raised into contact with the roof when the screen sections are upright. To hold the sections upright wedge-like locking members are inserted into brackets supporting the pivot pins to engage on the springs.

Abstract: A mineral mining installation employs a scraper-chain conveyor with separate channel sections each with a floor plate connected between sigma-shaped side walls arranged end-to-end and a scraper-chain assembly is circulated along the channel sections to transport material. L-shaped components are attached to the side walls of the channel sections and these components define or connect with spaced-apart supports projecting beneath the lower flanges of the side walls to produce slots therewith which receive bottom plates closing off the underside of the conveyor. Tongues on these bottom plates serve as a locating and stop means engageable with the supports. A guide for a machine and for receiving the chain used to move the machine is supported by the L-shaped components on the mineral face side and a multi-part displaceable screen is carried by the L-shaped components on the opposite side.