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US 4,715,409 AGranted
Device for coupling a heddle frame with a driving element
AssigneeGrob & Co. Aktiengesellschaft
InventorMartin Graf
Life of this patent
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AssigneeGrob & Co. Aktiengesellschaft
InventorMartin Graf
Estimating the term…
One coupling element secured to a heddle frame has a pivotally mounted bolt latch for interlocking with another coupling element connected to a drive member when the another element is inserted in an opening of the one element to couple the heddle frame with the drive member. Toothing on the bolt latch and toothing on the another coupling element come into the locking position by a toggle lever pivotally mounted on the one element. The toggle lever has a manual operating lever, and a further lever element hinged thereon and comprising a bolt-shaped part surrounded by a tensioned helical compression spring which is supported between two abutments which are constructed as hinges for connection of the lever to the manual operating lever and to the bolt latch. One abutment is fixed to the bolt, and the other abutment is slidable relative to the bolt to a limited longitudinal extent determined by stops formed by an over-sized bore in the hinge receiving a pin carried by the bolt. In the over dead-center position of the toggle lever, in which the bolt latch is urged into the locking position, a cam-shaped projection on the manual operating lever abuts against an angled end of the L-shaped bolt latch. This mutual support is also present when, as a result of wear of the toothing, the bolt latch allows itself to be pressed slightly further, and the manual operating lever modifies its pivoting end position accordingly under the action of the spring. Thereby self-adjustment is ensured and the occurrence of play between the coupling elements is prevented.
A device for coupling a heddle frame with an oscillatory drive element comprising, a pair of coupling elements which are engageable one into the other and which, in use, are respectively disposed on a frame stave of said heddle frame and on said oscillatory drive element, a bolt latch comprising a pivotally mounted part of one of the coupling elements and being capable of pressing against the other coupling element when the coupling elements are engaged, the bolt latch having wedge surfaces extending transversely to the direction of drive and arranged to co-operate with matching surfaces on the other coupling element when the latch is pressed against it to produce a positive locking of the coupling elements in the engaged position, a toggle lever hinged to the bolt latch for operating the bolt latch and being pivotally mounted on said one coupling element, said toggle lever being pivotable against the action of a compression spring into an over dead center position in which the bolt latch is in the locking position, the toggle lever comprising an operating lever and a lever element interconnected by a joint, the lever element being hinged at one end to the bolt latch, and the compression spring abutting on said joint and on the end of the lever element which is connected to the bolt latch.
Dependencies are inferred from the claim text.