Abstract: The holding device is formed of an elongated bar with slots to receive a base of the parts to be electroplated and contact strips in the slots to electrically contact the received parts. Resilient electrical contact-making elements are disposed in facing relation to the contact strips to clamp the parts in place and to provide an additional electrical contact. The device also includes a plastic cover over the contact bar and resilient elements to protect the bar and elements. The bar is also provided with a hook at one end for securement to a frame for electroplating.

Abstract: An electric unipolar machine is disclosed which comprises two rotating cylinders disposed one behind the other in an axial direction. The aforesaid rotating cylinders are surrounded by respective stationary cylinders and are connected thereto by sliding contacts.In accord with the invention, a rotor hub which has a central recess and which is divided at a point along the axial direction is provided for supporting the rotating cylinders. The stationary cylinders, in turn, are supported by a housing which is also divided, but along a point in the circumferential direction. In further accord with the invention, the winding of the machine is arranged in the central recess of the rotor hub and is formed as a one-piece ring. Additionally, the winding is supported by means extending through the parting gap of the divided housing and is aligned and fastened by bolts distributed around the circumference of the housing.

Abstract: To provide a piezoelectric pressure pickup for a fuel injection line, a piezoelectric ceramic plate is mounted between two pressure plates within a pipe clamp which is clamped around the fuel line and has a low coefficient of expansion compared to that of the injection line. One side of the piezoceramic plate is acted upon through one of its pressure plates by a force transmission element and is braced on the other side with a leaf spring which is compressed by means of a pressure screw.

Abstract: The invention provides a method for the preparation of relief structures of highly heat-resistant polymers, using radiation-sensitive, soluble preliminary polymers in the form of polyaddition or polycondensation products of polyfunctional carbocyclic or heterocyclic compounds containing radiation-sensitive radicals in ester groups bound to said compounds with diamines, diisocyanates, bis-acid chlorides or dicarboxylic acids of cyclic structure. According to the invention, the polyfunctional compounds carrying the radiation-sensitive radicals have, besides carboxyl, carboxylic acid chloride, amino, isocyanate or hydroxyl groups suitable for addition and condensation reactions, radiation-reactive radicals in the ester-groups bound to the compounds, partly in ortho or peri position thereto of the following structure: ##STR1## wherein: R.sub.1 = alkylene or aralkyleneR.sub.2 = h, ch.sub.3, clR.sub.

Abstract: The cover for a weaving machine is formed, in part, of flexible mats of sound-insulating material which can be raised or lowered in the manner of a window shade.In one embodiment, the rollers on which the flexible mats are mounted are positively driven to raise or lower the mats while a toggle means is used to support the mat over the machine frame. In addition, the rollers are mounted in a carriage which can be moved to one side while the sides of the cover are opened to allow access to the machine from above.In another embodiment, the flexible mats are in an accordion or pleated form and are raised or lowered via an endless chain.

Abstract: An electric master switch including an actuating member which is fastened to a mounting wall and is coupled to a housing containing the switching elements of the switch by means of resilient locking arms disposed in engagement with the actuating member. Wedge-shaped slide members are disposed between the locking arms and the housing for disengaging the locking arms from the actuating member.

Abstract: A fuel gas obtained in a reformed gas generator through the catalytic reaction of hydrocarbons and a gas containing oxygen and provided to an internal combustion engine has its heat content along with that of the exhaust gas of the engine used to convert methonal endothermically into a gas mixture containing carbon monoxide and hydrogen with the gas mixture so formed fed to one or both the reformed gas generator and, along with the fuel gas, the internal combustion engine.

Abstract: The powdered fuel is dosed in metered amounts by a pocketed dosing wheel into a fuel-feeding duct which is opened and closed by reciprocally mounted slider. Air is charged into the fuel feeding duct via a compressed air duct above the fuel valve. Upon opening of the fuel valve, a blast of air is charged via a control valve into the compressed air duct to expel the powdered fuel in the fuel-receiving chambers of the fuel valve.

Abstract: A programmable timing device includes a support for receiving markings at locations corresponding with predetermined times in a given period, the locations designated by characters indicating respective hours and predetermined intervals in minutes of the given period, timing means for deriving sequential timing signals at predetermined intervals during the period and means for providing an output signal whenever there is correspondence between a timing signal and a respective one of the markings.

Abstract: A circuit arrangement is disclosed for supplying an electric machine from a d-c voltage source. The circuit arrangement comprises a self-commutating inverter having valve branches that can be fired and extinguished and d-c voltage inputs to which electronic switching members are connected. In accordance with the invention, a capacitor is connected to the output of the inverter via a rectifier, and the d-c voltage outputs of the latter are connected via current paths with the poles of the d-c voltage source. To obtain at least partial recovery of the energy stored in the capacitor ohmic resistors are arranged in the current paths. Complete energy recovery is, in turn, realized by arranging controlled electronic valves in the current paths.

Abstract: The distribution pipe is of narrowing circular cross-section with an elongated aperture. The pulp guide is mounted via a tongue and groove connection on the pipe to both sides of the aperture in order to hold the pipe together against the peripherally operative tangential force of the pipe. The plates which form the throat can be replaced from time-to-time to change the size of the throat.

Abstract: A measuring device for determining the voltage on the conductor of a metal-encapsulated high-voltage switching installation is disclosed. The measuring device includes an electrode disposed between the conductor and the encapsulation of the switching installation which delivers an electrical signal to a measuring circuit. In accord with the invention the measuring device is further provided with a test circuit which comprises the electrode, two separated electrode terminals and a current-sensitive measuring or indicating member.

Abstract: A parallel resonant circuit frequency converter having input terminals of its inverter bridged by an auxiliary commutating arrangement which consists of a bridge circuit of thyristors, the a-c outputs of which are connected to a capacitor in which thyristors of the auxiliary commutating arrangement are fired until a predetermined capacitor voltage is reached to start up the frequency converter, the thyristors of the inverter then fired until a current of predetermined magnitude flows, which is kept contant by control of the rectifier, and subsequently, the thyristors of the auxiliary commutating arrangement are fired prior to each zero crossing of the resonant circuit voltage and, the thyristors of the inverter, delayed by a constant time span, are fired until the resonant circuit voltage has reached a predetermined value.

Abstract: A process for the manufacture of flat sheets or webs from a natural fiber material such as cellulose fibers in which the fibers to be processed are first placed on a substrate in the form of a dry heap after which an amount of water not exceeding the amount of moisture which can be absorbed by the fiber is added, whereupon the wetted fibers are subjected to pressure and temperature causing them to bond together forming a sheet or web. When sheets or webs of greater thickness are being made according to the present invention a further step of cooling before relieving pressure is carried out to avoid steam pockets formed within the web from breaking through upon release of pressure.

Abstract: A method of operating a cycloconverter which is adapted for use with a load in the form of a parallel resonant circuit and for use with an intermediate d-c link supplied by an a-c voltage source and including a smoothing choke and a controlled rectifier, the cycloconverter including an inverter circuit comprising a bridge circuit having output terminals adapted to be connected to the load and input terminals adapted to be connected to the d-c link, in which starting of the cycloconverter is realized by firing the thyristors of an auxiliary commutating device for a time interval sufficient to charge commutation capacitors to a predetermined voltage and the thyristors of the inverter then fired for a time interval sufficient to result in a current of predetermined magnitude, the latter being held constant by controlling the rectifier in the d-c link, and, thereupon, prior to each zero crossing of the resonant circuit voltage, first firing the thyristors of the auxiliary device followed, after a predetermined ti

Abstract: A pressurizer relief or surge tank for connection with the pressurizer of a pressurized-water coolant system, has the usual tank partly filled with water and with a pressurized-gas cushion above the water. For more uniform relief action, the bottom of the tank contains a distribution pipe means rather closely fitting the inside contour of the tank and having a large number of distributing holes in its upper periphery, both transversely and circumferentially, a pipe having an upper end for connection with the coolant pressurizer, extending through the top of the tank and down to the pipe means in the tank's bottom, where the pipe connects with the pipe means by a system of radial connecting pipes.

Abstract: A water separation cell for removing the reaction water from the electrolyte of fuel cells and fuel cell batteries which comprise a liquid chamber bounded on at least one side by a porous diaphragm, and a gas chamber bounded by the diaphragm and a condensation surface adapted for cooling, in which the liquid chamber is subdivided into two chambers of different size which are arranged on top of each other with the upper, larger chamber serving as the electrolyte space and the lower, smaller chamber taking up the condensate which passes through the porous diaphragm into this chamber due to the pressure of a gas present in the gas chamber.

Abstract: The warp beam is made of at least two telescoping parts with a clamping means pressing the parts together radially from within the area of overlap. The clamping means includes a wedge-shaped clamping plate which is pressed against a wedge on the end of the innermost part of the warp beam by means of a partially threaded spindle which is rotatably mounted within the interior of the innermost part.

Abstract: The coupling has at least one coupling part secured to the heddle frame with a toothed driving element extending from the beam into an opening in the drive lifter to engage with a second toothed coupling part. Each coupling part within a drive lifter is spaced from a wall of the drive lifter to define a passage to receive a driving element.

Abstract: A protection circuit for protecting the thyristors of a series circuit of several thyristors, each of which has a corresponding firing circuit to which its anode-cathode voltage is applied.