Abstract: In order to obtain a desired course of a machining line differing from a straight line or a corresponding flank line of a workpiece profile, it is necessary to control the working point of the tool 2 so that on the rectilinear stroke movement of the tool 2, a movement extending transversely thereto is effected by a tool positioning device 4. Such a device is constructed in the form of a toggle mechanism on which further fine control movements can be imposed through a series of adjustment possibilities.

Abstract: A bowl-mill gearing (14) which consists of an epicyclic gear (14b) and an intermediate gear (14a) composed of spur wheels (18, 20, 22, 24) with parallel axes. The driving shaft (26) of the intermediate gear (14a) is disposed parallel to the driven shaft (52) and with spacing from the mill axis (42). The driven wheel (24) of the intermediate gear (14a) means with a small intermediate wheel (22) which is mounted for rotation outside the annular gear case (20) of the bowl-mill gearing (14) and is disposed so that it projects through a cut-out (80) in the gear case (30) into the interior of the gear case. The dimensions of the intermediate wheel (22) and of the driven wheel (24) are selected so that the wall (34) of the annular gear case only has to be provided with a cut-out (80) which is less than an eighth of the circumference of the gear case as a result of which there is negligible weakening of the gear case.

Abstract: For machining the tooth flanks of a hardened workpiece having pre-formed teeth two cutting blades or plates are secured to a cutting blade or plate holder. The cutting blades or plates are provided with a base member or backing formed of a hard metal and a cover layer sintered thereon which is formed of cubic boron nitride. Each cutting blade forms a cutting surface and a clearance surface. Each individual cutting blade or plate is arranged at the cutting blade or plate holder in relation to the direction of the intended cutting movement such that the surface of the cover layer forms the clearance surface and an end face or surface of the cover layer is located in the cutting surface. Consequently, there is achieved the result that the cutting surface can be reground in the same manner as tools which, for example, are made of hardened steel and which are not provided with a cover layer.

Abstract: A displacement detector especially intended for a gear wheel grinding or inspecting machine contains a conventional pre-stage comprising a forward-backward counter receiving measuring pulses, a buffer or intermediate store for preserving the counter state at each moment, and a comparator for detecting predetermined position values during a measuring operation. To prevent overflow of the counter during more extended travel paths and at high resolution a pulse storing and detecting circuit and a synchronizer circuit are provided which enable the counter to be reset at any moment without any pulse becoming lost. Consequently, a conventional 8-bit or 16-bit microprocessor system and circuit components or elements of the same bit format can be used. The use of a 32-bit format is thus avoided, which otherwise requires substantially higher expense in terms of hardware, space and circuitry and which otherwise unavoidably must be used for more extended travel paths and high resolution.

Abstract: A circuit for transferring measured values from an incremental position measuring system wherein the analogue output signals of this incremental position measuring system are digitized and transferred via a counter to a computer which delivers them to an evaluation device. Between the counter and the computer there is provided an intermediate storage in order to avoid that the computer receives instable data during the processing time of the counter between two events, during which the counter passes from one counter state to the next one. By means of a synchronization circuit the computer controls the intermediate storage according to a priority sequence and such that this intermediate storage only reads counter states from the counter during time intervals which are greater than the processing time of the counter or at least equal thereto.

Abstract: The protective cutoff device includes a cutoff control and a cutoff valve system connected to an automatic position control which is present anyway in the gear wheel grinding machine serving for topological flank correction grinding and to an adjusting cylinder, respectively. As a result, the grinding wheel is effectively disengaged from the tooth flank in the process of being ground in the event of electric power failure and/or pressure failure or an undesirable pressure drop or upon the occurrence of any other disturbance or malfunction of the grinding wheel. Therefore one side of the adjusting cylinder is connected to a return line and the grinding wheel carrier or support is displaced against a stationary stop by a force or pressure accumulator.

Abstract: A jaw or dog clutch which automatically engages when reaching rotational speed equilibrium possesses an axially displaceable clutch star which is rigidly connected for rotation by means of a first tooth system or set of gear teeth with a drive hub, however, is connected to be axially displaceable, and possesses a second tooth system or set of gear teeth which can be brought to mesh, by axial displacement of the clutch star, with a tooth system or set of teeth, of a power take-off hub. At the clutch star there is rotatably mounted a screw socket which is connected by means of a pair of coarse-pitch threads with the power take-off hub. The screw socket can be entrained in one rotational direction by the clutch star by means of a pawl blocking device.

Abstract: A gearing arrangement for a grinding apparatus, especially a bowl-type grinder or grinding mill, comprises a lower housing portion and an upper housing portion secured to the lower housing portion. At the upper housing portion there is rotatably mounted a support or mounting plate for a grinding bowl or receptacle. This support or mounting plate is mounted at the upper housing portion for rotational movement about a substantially vertical axis of rotation. The support or mounting plate is driven by angular gearing, for instance bevel gearing, and planetary gearing arranged in the lower housing portion. The planetary gearing contains an outer central gear which is arranged upon the lower housing portion as a part of the upper housing portion and is constructed as a support ring of an axial bearing for the support or mounting plate.

Abstract: A gripper arrangement for a lifting or hoisting apparatus serves to transport workpieces having a journal or plug-like end. This gripper arrangement or gripper contains a housing in which two slides are essentially symmetrically arranged and radially displaceably guided with respect to a primary or main axis. At each of the slides there is supported a respective clamping or chucking jaw by means of a related guide device which is connected with the related clamping jaw by means of a radial inner hinge joint and with the related slide by means of a radial outer hinge joint which is arranged further towards the outside in axial direction than the radial inner hinge joint. Within the housing there is rotatably mounted a control body member which is operatively coupled with a drive motor. At the control body member there are formed control cams which, during rotation of the control body member, displace the slides.

Abstract: The generating method is accomplished at a machine containing one or two tools, constructed to possess a disk, cone or double-cone configuration, which are moved to-and-fro in a stroke-like fashion along the tooth flanks and can be advanced in the direction of the tooth flanks and act at one or two work locations upon a respective tooth flank. The displacement of the tool or each tool needed for producing the profile and longitudinal corrections is determined for each work location at the field of action or engagement zone of the teeth and is controlled as a function of the generating position and the stroke position of the machine tools according to predetermined functions.

Abstract: A method of measuring errors in the rotational truth of gear teeth of a gear by means of a measuring device having a feeler guide which is pivotable about a pivot axis parallel to the gear axis, the feeler guide guiding a feeler which is prebiased in the direction of the gear and cyclically engages into the gear teeth as the gear rotates. The feeler together with the feeler guide is pivotable about its pivot axis and can be displaced back in relation to the feeler guide. An electronic circuit determines the largest degree of rearward displacement of the feeler during each measuring cycle in that it stores signals delivered by the feeler and compares such stored signals with one another. During each measuring cycle there is formed from a number of signals delivered by the feeler as well as from a number of subsequently delivered signals a respective mean value.

Abstract: A method of determining the boundaries of a measuring path of a tooth flank-testing apparatus, wherein a measuring feeler is arranged upon a cross-slide arrangement composed of an X-slide or carriage movable in the direction of the tooth width of a test piece and a Y-slide or carriage movable in the direction of the tooth height. Each carriage has associated therewith a X-drive and Y-drive containing X-servomotor and Y-servomotor, respectively, X- and Y-position transmitter and X- and Y-position regulator. Both drives can be selectively manually controlled or by a program-controlled computer, which processes apart from signals of the position transmitter also signals delivered by the measuring feeler itself in accordance with the deflection of its measuring head and interrupts the course of the program when the deflection exceeds a predetermined value.

Abstract: Both gas turbines of a drive system for marine vessels can be selectively connected by related first clutches with drive pinions and during so-called cruising travel, where only one drive unit or machine is operative, additionally via a gearing train with the related drive pinions. By means of speed reduction gearing the drive pinions drive two propeller shafts.

Abstract: A method of grinding gears is provided, wherein a workpiece support and a tool base are movable relative to one another for partial movements of the workpiece, for setting the gear teeth data, for accomplishing movements for configuring a tooth profile, and for the to-and-fro lengthwise stroke along the tooth flanks to be ground. A grinding wheel support is mounted at the tool base for pivotable movement about a pivot axis and a grinding wheel is mounted to be rotatably drivable at the grinding wheel support. The axis of rotation of the grinding wheel extends transversely with respect to the aforementioned pivot axis. The grinding wheel support is connected with the tool base by a pivot drive which, during grinding of a tooth flank, enables random changes of the grinding-pressure angle or angle of attack between the grinding wheel and the tooth flank.

Abstract: A testing apparatus for involute and helical gear teeth comprises a rotatable chucking device for the test piece, and a feeler device containing a feeler which can be moved along the tooth flanks of the test piece. A respective drive serves for driving the chucking device and the feeler device. A regulation device is provided for at least one of these drives, and a mechanical transmission arrangement is provided between the chucking device and the feeler device. A displacement pickup or transducer is arranged between two elements of the transmission arrangement and serves to measure the relative movement of both such transmission elements. An electrical circuit serves to infeed the measuring signals of the displacement pickup or transducer to the regulation device and such signals are superimposed upon the measuring signals of the feeler device.

Abstract: A gear tooth flank testing apparatus and method wherein there is provided a housing erectable upon a bed or the like of a gear cutting machine. A measuring feeler is moveably arranged at the housing by means of two cross-wire arranged carriages having associated drive and displacement path measuring devices. The measuring feeler is moveable along two coordinated axes intersecting the axis of the workpiece to be tested. A control and evaluation circuit moves the measuring feeler along a tooth flank of the workpiece and compares the actual settings of the measuring feeler with predetermined reference settings. In particular, at the housing there is arranged a feeler bolt which can be pressed in spaced relationship from the measuring feeler against two neighboring tooth flanks of the workpiece.

Abstract: A method and test apparatus for testing the tooth flank profiles of large diameter gears, contemplates the provision of two contact elements and a measuring feeler, which is movable along a X-axis parallel to the connection line of both contact elements and a Y-axis extending transversely thereto. The contact elements are inserted into a respective tooth gap or space of a gear which is to be measured and the test apparatus is brought into a position where both of the axes are located in a plane normal to the gear axis. Then, there is determined the origin of a X-Y-coordinate system formed by both axis, the measuring feeler thereafter is moved along at least one tooth flank and the thus measured coordinates are compared with reference values. Importantly, the invention contemplates measuring the spacing between both of the contact elements and determining therefrom the spacing of the coordinate origin from the gear axis.

Abstract: An automatically engageable jaw clutch having a toothed drive hub, a toothed power take-off hub, and a clutch star axially displaceable with respect to the power take-off hub. The clutch star is continuously connected with the drive hub for conjoint rotation by means of first teeth means formed thereat and has second teeth means which can be brought into engagement with the teeth of the power take-off shaft by axial shifting of the clutch star. A screw socket or sleeve which is connected by means of a pair of coarse-pitch threading with the power take-off hub, is only conjointly axially displaceable together with the clutch star and rotatable relative thereto. The screw socket is entrainable by the clutch star by means of a pawl blocking mechanism composed of a pawl and ratchet teeth, when the drive hub overrides the power take-off hub.

Abstract: An automatically engageable jaw clutch having a toothed drive hub, a toothed power take-off hub, and a clutch star which is axially displaceable in relation to the power take-off hub. The power take-off hub is mounted to be rotatable and inclinable with radial play at a bearing body rigidly connected with the drive hub. This radial play is smaller than the radial play between a screw socket, operatively connected with the power take-off hub, and the clutch star. The clutch star has a first tooth system and a second tooth system. The clutch star, in axial spacing from its first tooth system, has a guide surface which is essentially concentric with respect to its axis of rotation. In the disengaged condition of the jaw clutch this guide surface is centered at a corresponding guide surface of one of both hubs, yet in the engaged condition of the jaw clutch such guide surface is spaced from the aforementioned corresponding guide surface.

Abstract: An apparatus for forming internal gear teeth at large workpieces at a gear shaper or gear shaping machine comprising a machine bed at which there are arranged a workpiece table for chucking a workpiece and an upright or stand. The workpiece table and the stand are rotatable, relative to one another, about the workpiece axis and radially feedable relative thereto. The stand has guide means along which there can be moved to-and-fro a plunger by means of a plunger drive. An auxiliary stand is rotatably and radially displaceable about the workpiece axis upon a bearing rim which is coaxially attached at the workpiece. The auxiliary stand has a guide arrangement along which there can be moved to-and-fro, in the tooth lengthwise direction of the internal teeth, an auxiliary plunger driven by the plunger by means of a bridge arrangement.