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    4.
    发明专利
    未知

    公开(公告)号：DE832840C

    公开(公告)日：1952-02-28

    申请号：DEM0001075

    申请日：1949-12-20

    Applicant: MEFINA SA

    Inventor： CASAS-ROBERT RAMON ,  COURT JEAN

    IPC: D05B15/02 ,  D05B27/02 ,  D05B27/22 ,  D05B73/00

    Abstract: 683,370. Sewing-machines. MEFINA SOC. ANON. June 12, 1951 [July 17, 1950], No. 13878/51. Addition to 683,292. Class 112. Feed by dogs.-In feed mechanism of the kind claimed in the parent Specification, the inner end of the rigid feed lever 3 is connected at 26 to a transverse lever 11 which is connected at one end 25 to an arm 12 mounted on a transversely movable pivot 13 and is oscillated by a pitman 9 connected to its other end and actuated by an eccentric 10 on a vertical shaft driven by worm gear from the shuttle shaft. In the form shown the pivot 13 is carried by an arm 14 on a vertical spindle provided at its upper end with a hand-lever for adjusting its position, the distance between the pivots 13, 25 being the same as that between the pivots 26, 25, so that the pivot 13 may be placed coaxial with 26, in which position no movement of the lever 3 is produced, and may be moved to various places on either side of the lever 11 to give feed movements of varying amounts in either direction. The feed-lift lever 18 is actuated by a face cam 17 on the worm gear. In a modification the shaft of the eccentric 10 may be horizontal, the cam 17 then being of the ordinary type and the pitman 9 being ball-jointed to the lever 11; in either form the eccentric and pitman may be replaced by other means for converting rotary into reciprocating movement.

    6.
    发明专利
    未知

    公开(公告)号：DE868100C

    公开(公告)日：1953-02-23

    申请号：DEM0010051

    申请日：1951-06-28

    Applicant: MEFINA SA

    Inventor： COURT JEAN

    IPC: D05B15/02 ,  D05B27/02 ,  D05B27/22 ,  D05B73/00

    Abstract: 683,370. Sewing-machines. MEFINA SOC. ANON. June 12, 1951 [July 17, 1950], No. 13878/51. Addition to 683,292. Class 112. Feed by dogs.-In feed mechanism of the kind claimed in the parent Specification, the inner end of the rigid feed lever 3 is connected at 26 to a transverse lever 11 which is connected at one end 25 to an arm 12 mounted on a transversely movable pivot 13 and is oscillated by a pitman 9 connected to its other end and actuated by an eccentric 10 on a vertical shaft driven by worm gear from the shuttle shaft. In the form shown the pivot 13 is carried by an arm 14 on a vertical spindle provided at its upper end with a hand-lever for adjusting its position, the distance between the pivots 13, 25 being the same as that between the pivots 26, 25, so that the pivot 13 may be placed coaxial with 26, in which position no movement of the lever 3 is produced, and may be moved to various places on either side of the lever 11 to give feed movements of varying amounts in either direction. The feed-lift lever 18 is actuated by a face cam 17 on the worm gear. In a modification the shaft of the eccentric 10 may be horizontal, the cam 17 then being of the ordinary type and the pitman 9 being ball-jointed to the lever 11; in either form the eccentric and pitman may be replaced by other means for converting rotary into reciprocating movement.

    7.
    发明专利
    未知

    公开(公告)号：DE878301C

    公开(公告)日：1953-06-01

    申请号：DEM0000849

    申请日：1949-12-10

    Applicant: MEFINA SA

    Inventor： CASAS-ROBERT RAMON ,  COURT JEAN

    IPC: D05B57/30 ,  D05B69/30

    Abstract: 683,294. Sewing-machines. MEFINA SOC. ANON. Dec. 15, 1949 [Jan. 14, 1949], No. 32200/49. Class 112. [Also in Group XXIV] Upper and lower shafts, connecting.-A rotary loop-taker and rotary feed-actuating member are driven by a single flexible belt or the like from the usual main shaft actuating the needle-bar and take-up. In the embodiment shown, the belt 41 is of woven material and has clamped to it members 69 (see Group XXIV) which engage transverse grooves in the belt pulleys on the various-shafts to give positive drive; guards 68 are provided to prevent the belt from moving away from the pulleys sufficiently to allow the members 69 to ride out of their grooves in the pulleys. The feed-niechanism is operated from' transverse shaft 19, as described in Specification 683,292, which has a pulley 43 of the same diameter as that on the main shaft; the loop-taker pulley 44 is of half this diameter. The axis of the loop-taker shaft is inclined, as described in Specification 683,293, [Group XXV], and to accommodate this the pulley 43 and a smaller pulley 45 guiding the return limb of the belt are arranged to extend below the level of the pulley 44 and the pulley 45 is also placed close to the wheel 43 on a spindle 46 inclined to the horizontal. To provide for tensioning of the belt, the shaft 19 and spindle 46 are mounted in a carrier 48 pivoted to the frame at 49 and engaged by an adjusting screw 61. Feed, regulating and reversing.-The member which engages the feed-actuating cam and the feed-adjusting guide, in the mechanism described in Specification 683,292, to transmit the desired motion to the feed lever is provided with an adjustable contact member for engagement with the cam, so that the central position of the feed-lever can be adjusted to compensate for the effect of the transverse movement of the cam-shaft in adjusting the belt tension. Specification 683,291 also is referred to.

    10.
    发明专利
    未知

    公开(公告)号：DE872147C

    公开(公告)日：1953-03-30

    申请号：DEM0011279

    申请日：1951-10-10

    Applicant: MEFINA SA

    Inventor： COURT JEAN

    IPC: D05B55/14

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