Sewing – Elements – Driving mechanisms
Patent
1988-05-23
1989-08-01
Falik, Andrew M.
Sewing
Elements
Driving mechanisms
112155, 112197, 112275, D05B 302, D05B 2500, D05B 2702, D05B 110
Patent
active
048525065
ABSTRACT:
A walking needle chain stitch sewing machine having multi sewing heads laterally spaced apart from one-another, that includes upper primary drive shaft and secondary lower first and second drive shafts and mechanisms thereof for driving first and second needle-drive mechanisms, and that further includes other secondary lower third and fourth drive shafts and mechanisms thereof for driving first and second feed-dogs and mechanisms thereof, with the first and second drive shafts being connected to the primary drive shaft by respectively spaced-apart drive-belts each mounted between driving and driven gears, and with the third and fourth drive shafts likewise being connected to the primary drive shaft by respectively spaced-apart other drive-belts each mounted between other driving and driven gears. Each of the sewing heads additionally includes reciprocatable sewing needle(s) reciprocatable in each of upwardly-downwardly movement directions and forwardly-rearwardly movement directions, and forwardly-rearwardly reciprocatable feed-dog(s), and synchonizing structures and mechanisms thereof. Each of the needle mechanisms and each of the feed-dog structures and mechanisms thereof are connected to its respective secondary drive shaft through and driven by a synchronizer structure and mechanism thereof that has its own separate solenoid lock therefor separately activateable and deactivatable for and during intermittently locking against revolving movement during synchronization of needle reciprocation with feed-dog reciprocation. Also there is an alarm mechanism activating a sensory-detectable alarm whenever one or more locks associated with the synchronizing mechanism(s) fails to engage.
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patent: 4470360 (1984-09-01), Gerlach
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patent: 4641591 (1987-02-01), Draghicchio
Falik Andrew M.
Hough William T.
LandOfFree
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