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US 4,393,801 AGranted
Sewing machine dust collector
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMasahisa Kato, Syouji Kasugai, Osamu Gouda
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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMasahisa Kato, Syouji Kasugai, Osamu Gouda
Estimating the term…
A dust collector for a sewing machine includes a dust collector box secured to a motor housing having a blower motor and a clutch motor disposed in axial alignment with each other. Suction hoses lead from the vicinity of the sewing machine to an inlet for the box and the outlet of the box is provided with a filter whereby a clean stream of air exiting from said box will pass over the motors to cool the same. The treadle operated control lever for the clutch for energizing the sewing machine is provided with a switch adapted to be closed upon engagement of the clutch and opened upon disengagement of the clutch. The switch is connected in series with a selective control switch for the blower motor whereby when the switch is in a first position the blower motor will be energized simultaneously with the engagement of the clutch and deenergized simultaneously with the disengagement of the clutch. When the switch is in a second or third position, the blower motor may be turned off or on independently of the clutch engagement.
A dust collector for use with a sewing machine comprising a clutch motor adapted to drive a sewing machine, suction means for collecting waste associated with the operation of said sewing machine including a blower motor, first control means for selectively energizing said blower motor in synchronization with the engagement of the clutch of said clutch motor and second control means adapted to selectively energize said blower motor independently of said first control means.
Dependencies are inferred from the claim text.