Needle position detector

Details Needle position detector Needle position detector

1981-12-16

1984-08-07

Nerbun, Peter P.

Sewing

Elements

Starting or stopping

318467, D05B 6924

Patent

active

044636989

ABSTRACT:
A needle position detector for a sewing machine includes a pair of disk-like members axially mounted on a rotary shaft coupled to the armshaft of the sewing machine. Each of the disk-like members is provided with an optically nonreflective portion occupying a greater area of its circumference and an optically reflective portion occupying a smaller area of the circumference. The disk-like members are adjusted so that the angular positions of the respective reflective portions correspond to the upper and lower needle positions. A light emitting element is associated with each of the disk-like members to emit light in a radial direction thereto. A light sensitive element is also associated with each disk-like member to receive light reflected from the reflective portion of the associated disk-like member to generate a needle position signal.

REFERENCES:
patent: 3149593 (1964-09-01), Johnston
patent: 3683294 (1972-08-01), Gaa
patent: 3990374 (1976-11-01), Heidt
patent: 4013933 (1977-03-01), Dohi et al.
patent: 4269132 (1981-05-01), Hsu

Affiliated with

Also associated with

Rating

Needle position detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Needle position detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Needle position detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-599141