Class 139/71 - Double lift

Subclass of Class 139 - Textiles: weaving
Definition: Two griffs are constantly reciprocating in opposite directions.
No. of patents: 27
Last issue date: 09/06/2005

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Number	Title	Issue Date
6938647	Rotating dobby for weaving loom and weaving loom equipped with such a dobby The dobby according to the invention comprises, at the level of each of its blades, an oscillating piece associated with an actuation element, at least one mobile coupling member borne by the actuation element and two pivoting levers subjected, on the one hand, to t...	09/06/2005
5860454	Electromagnetically-operating Jacquard control device An electromagnetically-operating Jacquard control device has an electromagnet (1) with a magnetic core (3), an armature (8) and a limit stop (14) for each controlling element (16) to be controlled. The limit stop can optionally be brought into the movemen...	01/19/1999
5735315	Wire loom dobby Attached to a dobby for use in a loom is an actuator which is, in turn, attached to a first finger and a second finger to move them in unison in a cycle. The first and second fingers control the position of an upper hook and a lower hook. These hooks, whe...	04/07/1998
5365979	Dobby for electromagnetically controlling a heald frame A dobby comprises first and second hooks relatively moved in the direction of approaching and leaving each other, a lever for selectively forcing the second hook to be engaged with the first hook, and a pusher for selectively providing the force to the le...	11/22/1994
5236019	Mounting arrangement for a dobby swinging lever A double-lift dobby of the Hattersley type, which includes swinging levers carried by moveable connecting rods wherein each connecting rod includes a slot in which an idle roller secured to the dobby frame is engaged. The edges of each slot define opposit...	08/17/1993
5209268	Spacer design for dobby rocker members In a weaving mechanism which includes rocking members for controlling the movement of heddle frames for forming the shed in weaving machines, the rocking members are separated from one another on a common support shaft by spacers interposed therebetween w...	05/11/1993
5088524	Double left dobby A double lift openshed dobby has a central shaft (1) on which are mounted a plurality of swing levers (2), each carrying a pair of articulated hooks (3), (4) kept inoperative by a spring (5), and two drive knives (13), (14) which are reciprocated at half ...	02/18/1992
5070911	Control device for double swinging lever of a dobby A double lift dobby for controlling the movement of the heddle frames of a weaving machine which includes coupling members pivotally connected at each end of double swinging levers which coupling elements are selectively engaged to oscillating plates by r...	12/10/1991
5031667	Hook structure to accommodate a pattern bolt for a swinging lever in a negative dobby The hooks associated with the swinging levers in a negative dobby of a weaving machine include a notch and opposing bearing face along their inner edges for positively retaining the hub and one arm of a bolt which is selectively actuated to engage each ho...	07/16/1991
4947899	Hook structure for negative dobby looms In a negative dobby for forming the warp shed in weaving looms, impacts and friction are reduced and consequently vibrations and noise-thereby improving the stability of the heald frames-by suitably shaping the rear end (14) of the hooks ( 7, 8), so as to...	08/14/1990
4832087	Negative dobbies of the type incorporating swinging levers In negative dobbies of the type incorporating swinging lever assemblies to which lever elements are connected and which lever elements support two articulated hooks, retaining members are provided in the form of pivotable locks placed between the bearing ...	05/23/1989
4687028	Negative dobby for weaving looms In a negative dobby for forming the warp shed in weaving looms, the stresses on some of the machine components are greatly reduced, whereby a more precise control of the heald frames is obtained, thanks to the fact that the controls transmitted to the cro...	08/18/1987
4685492	Reading device in dobby machine In a reading device for a dobby machine, the reading levers and retaining hooks are pivotally mounted on separate axes. Each reading lever rotates a retaining hook so that the angular velocity of the retaining hook decreases as the retaining hook pivots f...	08/11/1987
4557298	Dobbies incorporating double swinging levers for weaving looms The present invention relates to dobbies incorporating double swinging levers for weaving looms. In order to simplify the construction of the reading device in the case of synchronized dobbies capable of operating both in reverse motion and in forward mot...	12/10/1985
4474221	Positive dobby machine A positive dobby machine characterized in that return knives (16a), (16b) move in parallel and have pressure receiving planes (18a), (18b) perpendicular to the moving direction, first pressure receiving planes (7a), (7b) which can be contacted in surface ...	10/02/1984
4469141	Double lift dobby A reciprocating double lift dobby operating an open shed has a pair of drive members 1, 2 which reciprocate at half the loom frequency and 180 degrees out of phase, one above and the other below a series of shafts 3 which are connected one to each of the ...	09/04/1984
4465107	Means for controlling knife oscillations and hook movements in a loom dobby An improved dobby uses linkages for controlling the oscillations of the fixed and mobile knives about their axes which comprise first levers fixed to the knives, second levers fixed to control shafts, and connecting rods which link said first and second l...	08/14/1984
4465108	Play taking-up means in loom dobby control units Improved means are provided in a loom dobby for taking-up play in the control unit. The surfaces of the fixed and mobile blades which limit the stroke of the rocker arms in this unit are positioned perpendicular to the line joining the points of contact b...	08/14/1984
4442869	Apparatus for the optical retention of the two reciprocatingly driven control elements of the shed forming arrangement associated with a loom The apparatus includes two retaining elements associated with the control elements, two actuating elements associated with the retaining elements, a shaft acting on the actuating elements in order to pivot the latter and to displace them in translatory mo...	04/17/1984
4412563	Multiposition dobby To move pile heddle frames between three or rather four shed positions, a four-position rocking lever is arranged between two adjacent heddle frame lifting units and the rocking lever controlling the heddle frame. The free end of the first lifting unit ro...	11/01/1983
4386631	Negative double lift dobby machine In a negative double lift dobby machine, a balance lever 8 is pivotally attached to a jack-lever, and driving members 16, 17 disposed respectively in front of upper and lower ends of the balance lever 8 reciprocate in opposite phases with each other. Driv...	06/07/1983
4326562	Dobbies for forming the shed on weaving looms The present invention relates to dobbies of the type in which each double swinging lever is controlled by two pulling hooks cooperating with pulling knives with reciprocal movement. Each non-selected pulling hook in each pair is raised away from the assoc...	04/27/1982
4305432	Positive dobby A draw hook having a bearing end, the outside circumference of which projects beyond the end of the baulk and serves simultaneously as stop against the recoil or repulsion knife and the stop rail. The drawing force for the movement of the heddle frame occ...	12/15/1981
4187886	Dobby for the formation of the shed on looms A dobby for the formation of the shed on weaving looms, of the type in which each of the double swinging levers coupled to the heddle frames of the loom is displaced alternately by two pivoted pulling hooks which are controlled on the one hand downwardly ...	02/12/1980
4182380	Dobbies for weaving looms A dobby for a weaving loom, of the type in which each dobby element associated with a heddle frame or group of heddle frames comprises an actuating lever actuated by a reciprocating movement, a double swinging lever pivoted thereon and of which the ends a...	01/08/1980
4120327	Double-lift dobby A negative double-lift dobby, Hattersley system, comprising controlled holding hooks and draw hooks. In order for the holding hook to be able to be controlled at any time, namely independent from the position of the draw hook, by the pegs of the pattern c...	10/17/1978
3951176	Hook connecting apparatus in a chain disc-type dobby machine In a chain disc-type compound dobby machine, flexible instruction receiving members are integrally fixed to supporting hooks for decreasing the weight and the moment of inertia of the moving parts so that the connecting and detaching action of the hooks m...	04/20/1976

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Class 139/71 - Double lift