Electrical generator or motor structure – Dynamoelectric – Linear
Reexamination Certificate
1999-05-24
2001-02-13
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Linear
C310S029000, C310S036000, C310S219000, C242S15000R
Reexamination Certificate
active
06188149
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a linear motor for a textile machine, an apparatus for influencing a sequence of movement of a thread using a linear motor, and a weaving machine with an apparatus of this kind.
A linear motor for a weaving machine is described in U.S. Pat. No. 4,998,420 which has a stator with a ferromagnetic plate and a permanent magnet with different polarity as well as an armature with a winding. The stator is arranged at a fixed location and the armature is rotatably journalled on an axis of fixed location.
In this embodiment of the linear motor, the bearing friction which arises and also the bearing clearance prove to be disadvantageous.
SUMMARY OF THE INVENTION
The object of the invention is to improve a linear motor.
The advantages which can be achieved with the invention are substantially to be seen in that the armature executes a movement in a plane; in that the movement is hysteresis-free and is absolutely free of clearance in the mountings; and in that the force which is exerted by the armature is directly proportional to the current strength.
The side walls of the coil body can be provided at the outer side with a copper layer or be manufactured of aluminum. This has the advantage that the permanent magnet, i.e. the magnet pair, produces eddy currents in the copper layer which damp the movement of the armature.
A weaving machine with an apparatus for influencing of the movement sequence of at least one thread or band using a linear motor is characterized in that the apparatus is arranged in the path of travel of the weft thread as a thread brake.
REFERENCES:
patent: 3624896 (1971-12-01), Daubeney et al.
patent: 3991954 (1976-11-01), Schwartz
patent: 4169234 (1979-09-01), Yonkers
patent: 4351596 (1982-09-01), Ohniwa et al.
patent: 4442367 (1984-04-01), Suzuki
patent: 4786834 (1988-11-01), Grant et al.
patent: 4875347 (1989-10-01), Vermot-Gaud et al.
patent: 4945269 (1990-07-01), Kamm
patent: 4998420 (1991-03-01), Scavino
patent: 5255521 (1993-10-01), Watanabe
patent: 5293290 (1994-03-01), Owens
patent: 5343899 (1994-09-01), Jacobsson
patent: 5560557 (1996-10-01), Horvath et al.
patent: 5682132 (1997-10-01), Hiroyoshi et al.
patent: 5920140 (1999-07-01), Nakagishi et al.
patent: 962185 (1957-04-01), None
patent: 0117520A2 (1984-09-01), None
patent: 2142366 (1973-01-01), None
Chetwynd, D.G., “Linear translation mechanisms for nanotechnology applications”,Measurement+Control, vol. 24, (1991) Mar., No. 2, London, GB.
Patent Abstracts of Japan, vol. 8, No. 243 (E-277) 1680!, Nov. 8, 1984 & JP 59 122359 A (Yoshiteru Takahashi), Jul. 14, 1984, Abstract.
Patent Abstracts of Japan, vol. 9, No. 169 (E-328) ‘1892!’, Jul. 13, 1985, & JP 60 043062A (Sankiyou Seiki Seisakusho K.K.), Mar. 7, 1985; Abstract.
De Jager Godert
Markward Dietmar
Dinh Le Dang
Ramirez Nestor
Sulzer Rueti AG
Townsend and Townsend / and Crew LLP
LandOfFree
Linear motor for a textile machine as well as an apparatus... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Linear motor for a textile machine as well as an apparatus..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Linear motor for a textile machine as well as an apparatus... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2608850