Maschinenfabrik Carl Zangs Aktiengesellschaft

W. Schlafhorst & Co.

Josef Brock

Paul Surkamp

A rotary dobby for moving a shaft includes a connecting rod connected to the shaft to be moved, the connecting rod having two mutually-opposite wedge detents disposed thereon, an eccentric disk carried on the connecting rod having a wedge guide extended radially in the eccentric disk, a drive shaft assembly having at least one detent groove formed therein, a coupling wedge disposed between the drive shaft assembly and the eccentric disk, the coupling wedge having an open shifting groove formed therein, two control pieces engageable in the shifting groove, two control rods each being connected to a respective one of the control pieces and being controlled according to a given pattern for pushing one of the control pieces into the shifting groove and for pushing the coupling wedge alternately into the detent groove along the length of the wedge guide when the drive shaft assembly is not rotating and into one of the two wedge detents, and a detent device disposed on the connecting rod at and associated with the wedge detents functioning in cooperation with the eccentric disk for maintaining the connecting rod and the eccentric disk in a zero position for receiving the coupling wedge.

Rotary dobby

A rotary dobby for moving a shaft includes a connecting rod connected to the shaft to be moved, the connecting rod having two mutually-opposite wedge detents disposed thereon along a given wedge-detent diametral line, an eccentric disk carried on the connecting rod having a wedge guide extended radially in the eccentric disk, a drive shaft assembly having at least one detent groove formed therein, a coupling wedge disposed between the drive shaft assembly and the eccentric disk, the coupling wedge having an open shifting groove formed therein, two control pieces engageable in the shifting groove, two control rods each being connected to a respective one of the control pieces and being controlled according to a given pattern for pushing one of the control pieces into the shifting groove and for pushing the coupling wedge alternately into the detent groove along the length of the wedge guide when the drive shaft assembly is not rotating and into one of the two wedge detents, and an automatic zero setting device associated with the connecting rod for maintaining the connecting rod and the eccentric disk in a zero position for receiving the coupling wedge.

A transmission for the shedding mechanism (dobby) of a loom in order to produce a non-uniform drive from a uniform drive, having a drive shaft and a driven shaft aligned therewith, said shafts being mounted in a transmission housing. In order to simplify the construction, a rotor is arranged fixed for rotation on the drive shaft, the rotor bearing at least one gear segment which is swingably supported on an eccentric shaft and has two cam rollers arranged in different planes, the gear segment being in engagement with a driven pinion arranged fixed for rotation on the driven shaft and the cam rollers cooperating in force-actuated and/or form-locked manner with two cams fastened in different planes to the transmission housing, the asymmetry of which cams producing a relative movement per revolution between the drive shaft and the driven shaft. The relative movement per revolution can be adjusted by replacing the two cams. The rotor can also be formed with two arms and carry two gear segments, the cam rollers of which cooperate with the two cams.

Transmission for the shed-forming mechanism of a loom

The invention relates to a rotary dobby having a wedge coupling between a drive shaft and an eccentric device for the harness motion, in which the wedge is displaceably supported in a radially extending recess in an eccentric disk arranged in a crank arm and can be coupled and uncoupled in accordance with a pattern in an axially extending groove of the drive shaft at two diametrically opposite coupling locations by a shift rod which is controllable in accordance with a pattern and engages by a coupling member into a groove of the wedge which is open in axial direction of the drive shaft. In order to assure a dependable coupling and uncoupling at high speeds of revolution, the wedge is locked against displacement in its coupled position by a spring-biased locking pawl on the eccentric disk and the locking pawl is displaceable by the coupling member of the shift rod into a position which permits the uncoupling of the wedge.

A dobby mechanism with a coupling, controlled according to a design, between a stationary drive shaft and a first gear with the number of teeth n, which first gear meshes with a second gear with the number of teeth 2n on a stationary axle, on which second gear an eccentric device for the dobby movement is arranged, whereby the drive shaft and the first gear are coupleable with each other by means of a radially movably mounted wedge, which wedge is controlled with a switching member from the outside according to a design, and in the coupled condition partially engages in a radially extending recess of the first gear and partially in an axially extending groove of the drive shaft. In the uncoupled condition the wedge is completely uncoupled from the drive shaft and the switching member comprises a switching rod, the latter being controlled according to the design, the switching rod in the coupling range engaging with a coupling member in a groove of the wedge.

Dobby mechanism

A control for a wedge coupling in a dobby mechanism with a reduction gear or step-down gearing between a drive shaft and an eccentric device for the dobby movement, a coupling place, and a switching member (which member is controlled according to a pattern or design) for the movement of the wedge, the switching member being under spring tension. Two control levers for the upper and lower shed movement are provided, which control levers are under spring tension and which engage or act on the switching member and are controlled by a known needle mechanism, one of the control levers additionally cooperating with a control axle, which axle is synchronously moveable with the shaft machine. A pulse element is synchronously controlled by the eccentric device (connecting rod), by which pulse element the control end of the not to be moved control lever is blocked in its starting position.

Control for a dobby mechanism

Control for a dobby mechanism with a wedge coupling between a drive shaft and an eccentric for the dobby motion, whereby the wedge is couplable and uncouplable with a coupling member in two coupling positions which are diametrically opposite to each other. Each coupling member is connected with one radially moveably mounted switching rod, that the two switching rods being in connection with each other via two control levers (which control levers under spring action are pulled into their starting position) and a coupling rod. One of the two control levers via a balance lever cooperates both with a known needle mechanism and with a control axle, the latter being moved back and forth synchronously in the rhythm of the pressure guides for the needle mechanism, whereas the other control lever is mounted on a fixed pivot axle.

A rotation shaft machine with a wedge coupling between a drive shaft and an eccentric device for the shaft movement, with which the wedge is mounted in a radially extending recess of an eccentric disc and in two coupling positions which lie diametrically opposite to one another according to a pattern is couplable in and decouplable from an axially extending groove of the drive shaft. The wedge has a groove which is open in the axial direction and at each coupling position there is arranged a switching rod, which is controllable according to the pattern, with a coupling member, the coupling member crossing into the groove of the wedge.

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Viersen, Germany

Josef Brock