Claims
- 1. An automatic sewing machine comprising a machine housing; a main shaft rotatably mounted in the machine housing to vertically reciprocate a needle bar with a needle; a belt wheel mounted on the main shaft and rotatable relative to the main shaft; drive means for rotating the belt wheel; clutch means arranged between the main shaft and the belt wheel and normally connecting the main shaft to the belt wheel so that the main shaft may be rotated together with the belt wheel; pattern information carrying means including a stack of individual pattern cams and rotated in a reduced speed by the main shaft; pattern cam selecting cam means rotatable stepwise to select the pattern cams; drive cam means operatively connected to the belt wheel and rotated thereby; follower means engaging the drive cam means and swingable thereby; transmission means connected to the follower means and reciprocated thereby; switch cam means opposed to the pattern cam selecting cam means and connected to the transmission means in such a manner as to be rotated stepwise thereby; means transmitting the stepwise rotation of the switch cam means to the pattern cam selecting cam means to rotate the pattern cam selecting cam stepwise; follower means arranged opposite to the cam selecting cam means and selectively operated thereby to engage the pattern cams; and pattern selecting means including individual pattern-selecting switches arranged on the machine housing and manually operable to select one of the pattern cams.
- 2. An automatic sewing machine as defined by claim 1, wherein the pattern cam selecting cam means includes a stack of individual cams, wherein the drive cam means is rotated by the belt wheel at a reduced speed, wherein the switch cam means includes a stack of switch cams, and wherein the follower means includes a plurality of followers.
- 3. An automatic sewing machine as defined in claim 2, further comprising an electric control circuit means operated by one of the pattern selecting switches; solenoid means operated by the electric control circuit means to cause the drive means to operate at a reduced speed and to simultaneously operate the clutch means to disconnect the main shaft from the belt wheel; switch means including individual switches each arranged opposite to the switch cams and cooperating therewith and selectively energized by the pattern selecting switches an energized one of the switches cooperating with a corresponding switch cam and cooperating with the electric control circuit to deenergize the solenoid so that the drive means may be stopped, and to simultaneously operate the clutch means so that the main shaft may be connected to the belt wheel when the corresponding pattern selecting cam selects a specific pattern cam.
- 4. An automatic sewing machine as defined in claim 2, further comprising means engaging the follower means with the drive cam, the means comprising solenoid means electrically operated by selectively operating one of the pattern selecting switches and linkage means connecting the follower means and the solenoid means.
- 5. An automatic sewing machine as defined in claim 2, further comprising means for automatically adjusting the lateral reciprocation amplitude of the needle bar in accordance with a selected pattern, the last-mentioned means comprising cam means including a stack of individual adjusting cams which are each angularly positioned by the drive cam means, a manually accessible automatic adjusting switch arranged on the machine housing, selecting cam means including a set of individual selecting cams arranged coaxially with the pattern selecting cams, a set of followers selectively brought into engagement with the corresponding adjusting cams by operation of the automatic adjusting cam means, a set of followers selectively brought into engagement with the corresponding adjusting cams upon engagement of the followers with the corresponding selecting cams, and a link member operatively connected at one end to the followers facing the adjusting cams and operatively connected at another end to the needle bar.
- 6. An automatic sewing machine comprising: a machine drive source; a plurality of pattern generating cams rotatably mounted in the sewing machine; cam followers, each cam follower being displaceable between an effective position engaged with the pattern generating cams and an ineffective position disengaged from the pattern generating cams; a pattern cam selecting device for selectively displacing the cam followers to their effective positions and including a first group of cams to disengage the cam followers from the pattern generating cams, and a second group of cams to engage the cam followers with the pattern generating cams, and first and second groups of cams' change-over switches, driving means to open and close in a predetermined sequence the cams' change-over switches when the second group of cams come to a position selecting position; pattern selecting switches each connected in series with the change-over switches; actuating means operative when connected to the machine drive source to automatically actuate the pattern cam selecting device; electromagnetic means connected in series with the pattern selecting and change-over switches, and energized to connect the actuating means to the machine drive source; an electric control circuit including circuit change-over switches and a semiconductor switching element and operated by manual operation of a selected one of the pattern selecting switches to first drive the follower disengaging cams to a follower engaging position, and then to still subsequently drive the follower disengaging cams to a position for releasing the cam followers, thereby terminating an automatic pattern selection cycle, further comprising additional cams driven with the follower disengaging cams and the pattern selecting cams and automatically determining a needle swinging amplitude and a feeding amount in accordance with a selected pattern, and additional followers operated by the follower disengaging cams to selectively engage and disengage the needle and feed adjusting cams, further comprising cams for manually determining needle swinging amplitude and feed amount, switching cams selectively rendering effective one of the automatic adjust setting cam group and the manual adjust setting cam group, means for driving the switching cams, rotary switches cooperating with the switching cams, and automatic-manual adjust setting switches for operating the control circuit to selectively render effective one of the automatic adjust setting cam group and the manual adjust setting cam group.
- 7. An automatic sewing machine comprising a machine housing; a main shaft rotatably mounted in the machine housing; a needle bar with a needle arranged in the housing for vertically reciprocating movement and being driven by the main shaft; a drive motor for rotating the main shaft; pattern information carrying means including a pack of individual pattern cams and rotated at a reduced speed by the main shaft; pattern cam selecting means rotated to select the pattern cams; drive means operatively connected to the drive motor to rotate the pattern cam selecting means; follower means arranged opposite to the cam selecting means and selectively operated by the latter to engage the pattern cams; pattern selecting switches arranged on the machine housing and manually operated to select one of the pattern cams; electric circuit means operatively connecting the pattern selecting switches to the drive motor and operated by a selective operation of the pattern selecting switches to activate the drive motor; transmission means selectively connecting the drive motor to the main shaft and to the drive means; and clutch means selectively operated by a selective manipulation of the pattern selecting switches to selectively connect the drive motor to the main shaft and to the drive means.
Priority Claims (1)
Number |
Date |
Country |
Kind |
51-81593 |
Jul 1976 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 813,491, filed July 7, 1977, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3874312 |
Cook et al. |
Apr 1975 |
|
4084523 |
Kasuga |
Apr 1978 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
813491 |
Jul 1977 |
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