US 830.353 Heinrich Mundlos
My invention has reference to sewing machines and relates more particularly to a device for guiding the needle-thread and taking the same from the spool, whereby the thread is uniformly and tightly drawn and enabled properly to enter the work, smooth running of the machine being at the same time insured. In prior devices for the same purpose swinging levers are generally employed, which in moving in the one direction tighten the thread and in moving in the other direction release it. Owing to the reversal in motion of the levers smooth running of the machine is greatly interfered with. For guiding the thread and winding the same from the spool use has also been made of rotating eccentric plates or rotary pins, over which the thread to be guided is passed. With these devices the defect is that the thread has always been passed over the take up and thus has to partake constantly of the motion, whereby the speed with which the take-up can work is diminished. Tightening of the thread with these contrivances is effected by drawing it over segments or the like, which lengthen the path, whereby naturally the increasing amount of friction detrimentally increases the tension of the thread. Finally, with all these prior devices there is the inconvenience that the time which serves for tightening or unwinding the thread occupies a great part of the time of rotation of the driving-shaft, that is, the time in which the needle moves up and down. In consequence only a short period remains for the work of the shuttle, so that the thread enters the work very quickly and therefore not so reliably, as it is only in a loose condition for a short period. All these defects are entirely overcome according to my present invention. The thread, which receives special guidance, is during an interval, which relatively to the time of rotation of the driving-shaft is but short, seized by a rotating cam plate or segment, raised, tightened and wound off the spool. The friction of the thread is but small and always remains uniform and the thread after the short period of tension in a position of rest.
September 4, 1906
GB 4.556 Mundlos Aktien-Gesellschaft & Richard Mundlos
March 4, 1901
US 759.298 Heinrich Mundlos
Covers for the Races of Sewing Machine Shuttle
My invention relates to improvements in covers for the races of sewing machine shuttles and more especially for the races of sewing machines with a shuttle oscillating in a circle. In these shuttles it has always been a great disadvantage that if the thread was torn the torn-off end of the thread was held fast between the shuttle and the race, whereby the sewing machine was stopped and could only be started again after opening the cover of the race, removing the shuttle, arranging the thread and setting the shuttle in again. All sewing machines with circular races possess this drawback, which is done away with by the construction of the cover forming the object of the present invention...
May 10, 1904
US 1.218.107 Richard Mundlos
Thread-Cutting Devices for Buttonhole
The object of my invention is to provide a thread cutting mechanism by which the two threads in the machine, that is the upper thread and the lower thread, are simul taneously cut when the machine is at rest.
Assignor to the Mundlos & Co.
March 6, 1917
GB 294.425 Richard Mundlos
December 12, 1927
GB 362.818 Mundlos Aktien-Gesellschaft & Richard Mundlos
Attaching electric motors
April 13, 1931
GB 397.325 Mundlos Aktien-Gesellschaft & Richard Mundlos
October 24, 1932
GB 397.327 Richard Mundlos
October 25, 1932