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US4566499A Expired / Lapsed US ⏱️ 0.0 years remaining

Jacquard mechanism

Assignee: Mitsubishi Chemical Corp
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Filing: 1984-11-23
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Granted: 1986-01-28
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Expires: 2004-11-23
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Abstract

Abstract An electronic jacquard mechanism for controlling shedding motion of warps by selectively holding dropper needles by means of solenoids in accordance with command signals generated from a computer. Movable cores of the solenoids are directly fixed on one end of the dropper needles. Housings of the solenoids, including stationary cores and coils, are secured directly on a printed board associated with the computer. The solenoids can be densely arranged on the printed board corresponding to the arrangement of the dropper needles, allowing greater compactness of the mechanism.

Inventors

  • 👤 Hiroshi Kitagawa
  • 👤 Masaaki Sato
  • 👤 Mitsumasa Sawai
  • 👤 Takeo Yamamoku
  • 👤 Koichi Akatsuka
  • 👤 Toshio Metoki

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 17:04
CPC Classifications
D; D03; D03C; D03C3/00; D03C3/20

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 227 words
In a jacquard mechanism for controlling a shedding motion or warps set on a loom, comprising a plurality of axially displaceable dropper needles, each associated with a horizontal needle relating to a group of said warps, and a plurality of solenoid, each corresponding to one of said dropper needles, said control being carried out by selectively energizing said solenoids to hold the corresponding dropper needles by a command from a computer, an improvement comprising, a printed board on which a circuit for transmission of a command signal from said computer to said solenoids is printed, solenoids comprising stationary cores, accommodated in housings secured, along with coils, directly on said printed board and disposed at predetermined position along extensions of axes of said dropper needles, and movable cores fixed to ends of said dropper needles closer to said stationary cores; means for periodically reciprocating all of said dropper needles along each longitudinal axis thereof from a first position where said movable and stationary cores are apart from each other at a predetermined distance to a second position where said movable and stationary cores substantially come into contact with each other; a guide plate provided with a plurality of holes for stably guiding said movable cores during said reciprocation of said dropper needles; and means for urging said dropper needle toward said first position for facilitating the return thereto.
Claim 2
Dependent Claim 227 words
In a jacquard mechanism for controlling a shedding motion or warps set on a loom, comprising a plurality of axially displaceable dropper needles, each associated with a horizontal needle relating to a group of said warps, and a plurality of solenoid, each corresponding to one of said dropper needles, said control being carried out by selectively energizing said solenoids to hold the corresponding dropper needles by a command from a computer, an improvement comprising, a printed board on which a circuit for transmission of a command signal from said computer to said solenoids is printed, solenoids comprising stationary cores, accommodated in housings secured, along with coils, directly on said printed board and disposed at predetermined position along extensions of axes of said dropper needles, and movable cores fixed to ends of said dropper needles closer to said stationary cores; means for periodically reciprocating all of said dropper needles along each longitudinal axis thereof from a first position where said movable and stationary cores are apart from each other at a predetermined distance to a second position where said movable and stationary cores substantially come into contact with each other; a guide plate provided with a plurality of holes for stably guiding said movable cores during said reciprocation of said dropper needles; and means for urging said dropper needle toward said first position for facilitating the return thereto.
Claim 3
Dependent Claim 43 words
An improvement according to claim 1, in which said reciprocating means for the dropper needles comprises a lifter plate, for supporting said dropper needles at an opposite end to that connected to said stationary cores, and cam means, for moving said lifter plate.
Claim 4
Dependent Claim 42 words
An improvment according to claim 2, in which said lifter plate is covered with a resilient sheet on the surface receiving said dropper needles for compensating for variance of an actual distance between the first and second positions of said dropper needles.
Claim 5
Dependent Claim 47 words
An improvement according to claim 2, in which said lifter plate is provided with cushion means at the respective contact locations of said dropper needles on said lifter plate for compensating for variance of an actual distance between the first and second positions of said dropper needles.
Claim 6
Dependent Claim 34 words
An improvement according to claim 1, in which said dropper needle urging means comprises compression springs, one of the ends thereof being fixed on said guide plate and the other to said dropper needles.
Claim 7
Dependent Claim 18 words
An improvement according to claim 1, in which said solenoids are arranged in alternating polarities in each row.
Claim 8
Dependent Claim 30 words
An improvement according to claim 6, in which said housings are provided with marks at free end surfaces for identifying a position of beginning ends of said coils wound therearound.
Claim 9
Dependent Claim 27 words
An improvement according to claim 1, in which said housings of said solenoids comprise shields made of a ferromagnetic material for preventing leakage of magnetic flux therefrom.

References Cited (Backward Citations)

US3103953A Cited
US4059131A Cited
JPS56107878A Cited
JPS5718680A Cited
JPS5734588A Cited
JPS5734587A Cited
JPS5834973A Cited
JPS5887884A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-01-27 1989-07-29 1990-01-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-01-27 1993-07-29 1994-01-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-01-27 1997-07-29 1998-01-28 $7700.00 Window Closed / Lapsed

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