US 4,727,910 AGranted

Drive connection for a reciprocating a connecting rod from a drive shaft through an eccentric cam

AssigneeKaiser Aktiengesellschaft

InventorPaul Surkamp

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Abstract

A drive connection for reciprocating a connecting rod from a drive shaft through an eccentric cam to manipulate a harness frame of a textile loom from one shedding position to another. The drive connection includes a pawl mounted on an eccentric cam and movable into and out of engagement in recesses in an annular drive ring only when the eccentric cam is in predetermined dwell positions. The pawl is controlled by a locking element against any change of position after it is engaged and it is continually biased in the direction of engagement. An actuating lever mounted on the connecting rod actuates the locking element to cause disengagement of the pawl from the drive ring recess. The actuating lever is controlled by an operating member that operates according to a predetermined program, and the actuating lever is prevented from actuation by blocking members that are spaced to allow actuation only at a dwell position.

Claims17

Dependent claims

A drive connection for reciprocating an operating member such as a harness frame of a textile loom by transmitting intermittent rotation of a drive shaft through an eccentric cam into reciprocation of a connecting rod, said drive connection comprising an annular drive ring fixed on the drive shaft and having a recess formed therein, a pawl pivotally mounted on the eccentric cam for engagement in and disengagement from said recess for selective drive connection and disconnection of said cam to said drive shaft, pawl locking means for releasably locking said pawl in engagement in said recess for driving connection of said drive shaft to said cam, actuating means mounted on said connecting rod and engagable with said locking means to disengage said pawl from said recess and thereby disconnect said eccentric cam from the drive of said drive shaft upon programed operation of said actuating means, and blocking means mounted on said eccentric cam for blocking said actuating means from engagement with or disengagement from said locking means except when said eccentric cam is positioning said connecting rod in a predetermined position, such as a shed position of a harness frame.

Dependencies are inferred from the claim text.