Abstract: Water-soluble, yellow monoazo dyestuffs of the formula ##STR1## wherein R.sup.1 is a moiety of the formula ##STR2## R.sup.2 is methyl, ethyl, methoxy or ethoxy, R.sup.3 is methyl or ethyl, andn is a number from 0.3 to 1.7,are useful for the preparation of recording fluids.

Abstract: An apparatus for supplying cut-to-length longitudinal elements to the intake of a grid welding machine includes a revolving endless transverse conveyor 3 which receives the longitudinal elements 16 into open receptacles 9 and conveys them over the upper side, a turning location and a part of the lower side of the transverse conveyor 3 into the intake area of the welding machine, in which the receptacles 9 for the longitudinal elements 16 are arranged on the periphery of the transverse conveyor 3 in groups forming magazines 8a, 8b and 8c. The mutual distance A between these magazines being at least equal to the width B of the same.

Abstract: A multi-spot resistance-welding machine for manufacturing welded grids consisting of a group of longitudinal wires and crosswires crossing the longitudinal wires at right-angles, to enable grids to be manufactured in which the length of at least some of the crosswires is smaller than the width of the grid and in which the relative position of these shorter crosswires can be selected with respect to the group of longitudinal wires, is equipped with two crosswire feed devices (16, 40) of which at least one, but preferably both, can be displaced and fixed in an allocated guide (15, 17; 51, 52) transversely to the feed path of the group (70) of longitudinal wires and relative to a delivery device (60) transferring the crosswires from the feed devices into the welding area.

Abstract: An electrical resistance grid welding machine for welding a family of wires as it passes through the machine along a feedpath into a strip of welded mesh which has a row of electrodes and a row of counterelectrodes arranged above and below the family of wires. The electrodes and counterelectrodes are supported at intervals by separate electrode beams which are driven back and forth, thus coupling the electrodes and counterelectrodes in a common motion. Pressure beams, which are connected to the electrode beams by rigid connectors, can be driven only perpendicular to the feed path. These pressure beams transmit the welding pressure to the electrodes but permit the electrode beams to carry out their reciprocating motion. The electrodes are guided in their associated electrode beam so as to be able to shift in the beam and are loaded by springs.

Abstract: The transmission comprises two pairs of aligned coaxial shafts (3,5,12,13) capable of being moved by way of a control relative to each other in an axial direction and having associated therewith at their respective facing ends or sides in each case a clutch disk (37,38,39,40). The shafts can be coupled in various combinations by way of a clutch body (2) disposed so as to be freely shiftable and rotatable between the two pairs of clutch disks.In order to dispose the motor and the elements driven by it on the same side of the transmission, the first pair of coaxial shafts is formed from an extension (3) of the drive shaft (1) extending beyond the clutch element or body (2) and from a hollow shaft (5) concentrically surrounding this extension (3) and connected to it under a fixed transmission ratio.

Abstract: A bending mechanism for wire or strip material is provided, which is intended in particular for bending back towards the edge longitudinal wires the projecting end portions of crosswires of reinforcement grids for reinforced concrete construction. The mechanism comprises a substantially circular-sectioned cylindrical bending form, and a bending-tool eccentrically mounted on a rotatable tool carrier which can be rotated in either direction about the axis of the bending-form. The bending-form is shiftable along said axis between a working position, in which the end faces of said tool carrier and said bending-form are substantially touching, and a rest position in which said two end faces define between them a gap for the passage of a wire which is to be bent, in particular a crosswire of a reinforcement grid.

Abstract: In order to be able to remove the wire from its supply source and in order to be able to prevent a bending of the wire, a wire-feed-clamp (3) can be moved along an alignment element (2) which, in a fixed position, is arranged on a carrier (1), whereby the wire-feed-clamp (3) produces a one-sided gripping effect and whereby a hollow needle (8) is affixed on the front side of the wire-feed-clamp (3), for the purpose of penetration of the solid body; at the rear extremity of the alignment element (2), a return-motion stopping-element (11) for the wire is arranged which, in the same sense as the wire-feed-clamp (3), produces a one-sided gripping effect and is aligned with the hollow needle (8) and whereby in front of the alignment element (2), a cutting element (20, 21) is arranged for the purpose of cutting-off the wire section which, at any given time, had been pushed through the solid body.

Abstract: This multispotwelding machine serving for the production of grids or gratings has a welding electrode system (50, 51, 52) suitable for double spotwelding in the direction of the longitudinal members (L) and having two lines of weld (S1, S2), two crosswire feed lines (E1, E2) arranged in a fixed position at a distance apart (A), two crosswire transfer tools (4, 5) which are arranged on a common bearer (1), which can be shifted in the direction of the grid feed by a length of stroke (H) corresponding with the distance of the plane of symmetry (ME) of the feed lines from the plane of symmetry (MS) of the lines of weld (S1, S2) of the welding electrode system, as well as a grid feed mechanism (67).

Abstract: The power transmission has two pairs of coaxial shafts (1,15 and 2,30 respectively) which are aligned with one another and are displaceable relative to one another and carry at their adjacent ends a coupling disc (3,16 and 4,31 respectively) upon each, which can be coupled at option by a central freely rotatable coupling body (12). In order also to enable direct connection of the driving shaft (1) to the driven shaft (2), one shaft each of the two aligned pairs of shafts (1,15 and 2,30 respectively) is formed by the driving shaft and the driven shaft respectively (1 and 2 respectively) and the other shaft is made as a coaxial hollow shaft (15 and 30 respectively) and is coupled via a gear wheel (23 and 38 respectively) and a back gear (26 and 51 respectively) to a gear wheel (22) on the driving shaft (1), or respectively coupled or able to be coupled via a gear wheel (50) to the driven shaft (2).

Abstract: A mechanism for bending a coplanar family of straight wires into zig-zags comprises deflector rollers for feeding the family of wires longitudinally in parallel with one another, bars adapted to be displaced transversely to the wires and carrying wire deflector pins, and a control device for moving the bars alternately in opposite directions transversely of the wires. In order to avoid sliding of the wires against the deflector pins during the bending operation, each bar is hinged to the one ends of at least two parallel bearer arms of equal length and pivotally supported about axes running perpendicular to the plane of bend. During each bending operation only one bar at a time can be displaced transversely by means of the control device to carry out a working stroke.

Abstract: The disclosure relates to the production by means of an electrical resistance welding method, of grids formed from metal wires crossing over another. The grid wires are carried through between rows of cooperating electrodes and, under pressure, are welded together at the cross points of the wires by an electric current. Each cross point of the wires and the surfaces of the associated electrodes of the grid welding machine, which lie in the welding region, are subjected to the action of a liquid coolant to increase the life of the electrodes and reduce distortion of the grid due to the localized heating of the wires.

Abstract: A grating of metal longitudinal strips (1) standing on edge in parallel with one another and narrower metal cross-strips (3) parallel with one another, is (for the achievement of higher load capacity) produced in such a way that in the longitudinal strips (1) slots (2) of changing width are incorporated, in which the inside width of the slot at the open end of the slot is chosen to the greater than, but on the contrary remote from this end of the slot is chosen to be less than the thickness of the cross-strips (3), cross-strips (3) are inserted into these slots (2) with the application to the strips (1, 3) of a welding voltage serving for the resistance welding, and with the application of pressure in the direction of insertion, so that material driven out from the edges of the slots forms weld beads (9) at the points of intersection of the strips.

Abstract: A lattice girder making machine has a stepwise feed mechanism for upper and lower chord wires; and a continuously operating bending mechanism for bending wire into zigzag strutting which is welded to the chord wires at a welding station. Between the bending mechanism ad the welding station the zigzag strutting slides along guides which allow the strutting alternately to contract resiliently and then to expand to accommodate the stepwise advance through the welding station. At the welding station the strutting is held at the required extension by fingers.

Abstract: A double point welding machine has active electrodes (3,4) and passive counter-electrodes (8,9) for simultaneously welding rods (5,6) together. In order to ensure that the welding pressure is uniform at both welding points, the counter-electrodes (8,9) are mounted on a current bridge (7) carried by a pressure beam (15). The pressure beam forms part of a four bar pivotal linkage the other arms of which are formed by rams (26,27) and a second beam (24) which is pivoted at a pivot (25).

Abstract: The invention relates to apparatus for and a method of moving a grid (G) longitudinally in stepwise fashion through a multi-spot welding machine by means of an element (5) arranged to engage a transverse rod (D) of the grid at a starting position, move the grid (G) forward through a number of steps at a first mean speed, and thereafter disengage from the rod (D) and return to the starting position at a mean speed greater than the first mean speed. The movement of the element (5) is controlled by a computer (31) so as to return to its starting position if the time required for its return from the position which it would occupy after the next step is greater than a preset maximum standstill time between steps.

Abstract: The invention concerns a mechanism for transferring cut-to-length wires out of a loose bundle of wires into a single layer of parallel wires. The mechanism comprises a wire channel, for receiving the single layer of parallel wires, which is inclined to the horizontal. The upper end of the lower side of the inclined channel extends beyond the upper end of the upper side to form a rest for the loose bundle of wires. At least one wiper-cam is positioned above the extended end of the lower side of the channel and is pivotable to and fro in the longitudinal direction of the channel, the end face of the cam facing the lower side of the channel being spaced from the lower side by a distance such as to allow a single wire to pass therebeneath into the channel. The lower side of the channel can be moved relative to the upper side of the channel.

Abstract: The invention relates to a change-under-load transmission having an input shaft (1) and an output shaft (6), each carrying a pair of gearwheels (2, 3; 4, 5). A composite layshaft comprises two pairs of coaxial shafts (7, 8; 9, 10) which are aligned axially with one another. At their adjacent ends the shafts carry friction coupling elements (25, 31 and 25, 30) which have effective coupling faces (25', 31'; 26' 30'). At their remote ends each of the coaxial shafts carries a gearwheel (23, 27; 24, 28) which is in permanent mesh with an associated one of the gear wheels on the respective input or output shaft. Between the adjacent ends of the two pairs of coaxial shafts a central friction coupling element (32) is positioned so as to be freely slidable axially with respect to the coaxial shafts. Correspondingly positioned ones (7, 9 in FIG. 1; 8, 10 in FIG.

Abstract: Wires are picked from a loose bundle of wires which have been cut to length, prior to feeding to a processing machine such as a grid welding machine. The bundle is laid on a supporting table (23) so that end parts of the wires project freely beyond the table. A lifting beam (18) having a vertical slot (19) is then raised beneath the projecting end parts of the wires so that most of the wires are raised but the others are received one above the other in the slot. A gripper having clamping cheeks (20) is applied from below and grips the lowermost wire in the slot. The gripper is mounted on a carrier (2) which is movable parallel to the wire axes to pull the gripped wire longitudinally out of the slot.

Abstract: A multispot mesh welding machine has a row of welding electrode holders (2) on one side of the working plane of the mesh (Q, L), each holder (2) being electrically connectable to a selected one of at least two busbars (11, 12, 13, 14) which extend across the machine transversely of the direction of advance of the mesh (Q, L), by a respective switching member (9) movable with respect to the electrode holder (2). Each of the elctrode holders (2) has a contact tongue (6) overlying the contact faces of the busbars (11, 12, 13, 14,) and the respective switching member (9) is positioned between the contact tongue (6) and the contact faces of the busbars (11, 12, 13, 14).

Abstract: A shearing machine for severing parallel longitudinal members of grids or gratings has a horizontal guide-beam (9) which is stationary during the cut and upon which are provided counterbutts (17) in the manner of comb teeth; and a cutter-beam (10) which is movable parallel to and alongside the guide-beam during the cut and upon which blades (18) are provided in the manner of comb teeth, the blades cooperating with the counterbutts on the guide-beam to shear longitudinal members extending through notches (19,20) formed between adjacent counterbutts of the guide-beam and between adjacent blades of the cutter-beam. The guide-beam and the cutter-beam are guided in a machine frame for vertical movement into and out of a working position in engagement with a grid or grating and are associated for common motion in the vertical direction.