Machine element or mechanism – Mechanical movements – Reciprocating to reciprocating
Reexamination Certificate
1999-10-07
2001-09-18
Fenstermacher, David (Department: 3682)
Machine element or mechanism
Mechanical movements
Reciprocating to reciprocating
C139S059000, C139S085000
Reexamination Certificate
active
06289755
ABSTRACT:
The present invention relates to a drive transmission assembly for transmitting motive drive between a reciprocating drive member and a driven member.
In particular, the present invention relates to such a transmission assembly which is used to connect the output from a Jacquard mechanism to the heald(s).
It is a common condition in jacquards that the Jacquard output to the loom is subject to small oscillation either at bottom shed or top shed or both, in addition to the normal lifting and lowering of the outputs which takes place as ends are selected and deselected. Elimination of these oscillations within the Jacquard may be difficult or impossible without considerable changes to the mechanism or extensive fine adjustment of the machine. Components of vertical oscillation may also occur because of vibrations in the Jacquard mounting and the gantry. These secondary oscillations can however be very detrimental to the other components of the weaving system, such as the harness.
According to one aspect of the present invention there is provided a drive transmission assembly for transmitting motive drive between a reciprocating drive member and a driven member in order to move the driven member between first and second limits of reciprocal movement, the assembly including a drive transmission member adapted for connection to the drive member and the driven member in order to transmit said motive drive, a fixed stop member arranged to be located within the path of reciprocal travel of said transmission member, the transmission member including a stop for abutment with said stop member in order to define said first or second limit of reciprocal movement for the driven member, said transmission member being adapted to define a vibration isolating connection between said stop and said drive member whilst said stop is in abutment with said stop member.
Preferably dampening means are provided for dampening impact of the stop with said stop member.
REFERENCES:
patent: 3747647 (1973-07-01), Bergmann
patent: 5511588 (1996-04-01), Jak{haeck over (s)}ić
patent: 5636663 (1997-06-01), Lacrdix
patent: 0051548 (1982-05-01), None
patent: 0330624 (1989-08-01), None
patent: 0374279 (1990-06-01), None
patent: 2509333 (1983-01-01), None
patent: 2510619 (1983-02-01), None
Bonas Machine Company Limited
Dann Dorfman Herrell and Skillman
Fenstermacher David
Skillman Henry H.
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