Sewing machine with an overload clutch
AssigneeDurkopp Adler Aktiengesellschaft
InventorChristoph Heckner
Life of this patent
Estimating the term…
Abstract
A sewing machine (1) with an overload clutch in the form of a friction clutch in the region of the handwheel (44), with a positioning motor (57), including a motor part (56) and a control part (55), and with a position transmitter (51) connected to the arm shaft (5). In the event of a blockage of the arm shaft (5), the control part (56) causes the positioning motor (57) to stop immediately and a fault warning to be output on an indicator panel (68) of the control apparatus (66). After the fault has been eliminated and the power supply has subsequently switched off and switched on again, the sewing machine (1) is ready for operation again.
Claims18
A sewing machine with an overload clutch for breaking the drive connection when a blockage of the sewing machine occurs, comprising:
- a drive shaft with a driving wheel mounted thereon,
- a drive motor with an electronic control, the drive motor being connected to the driving wheel for driving the drive shaft,
- a position transmitter connected to the drive shaft, wherein the position transmitter transmits signals to the control representing the rotary position and speed of the drive shaft,
- an overload clutch comprising a friction clutch having a pair of friction surfaces arranged between the driving wheel and the drive shaft,
- wherein the signals transmitted by the position transmitter to the control indicate when the drive shaft is stopped by a blockage of the sewing machine, and
- wherein the control causes the drive motor to stop in response to the signals indicating that the drive shaft is stopped.
A sewing machine with an overload clutch for breaking the drive connection when a blockage of the sewing machine occurs, comprising:
- a drive shaft,
- a drive motor with an electronic control, the drive motor being connected for driving the drive shaft,
- a position transmitter connected to the drive shaft, wherein the position transmitter transmits signals to the control representing the rotary position and speed of the drive shaft,
- an overload clutch arranged for allowing the drive shaft to stop when a blockage occurs, said overload clutch having a pair of friction surfaces arranged between the driving wheel and the drive shaft,
- wherein the signals transmitted by the position transmitter to the control indicate when the drive shaft is stopped by a blockage of the sewing machine, and
- wherein the control causes the drive motor to stop in response to the signals indicating that the drive shaft is stopped.
A sewing machine with an overload clutch for breaking the drive connection when a blockage of the sewing machine occurs, comprising:
- a drive shaft with a driving wheel mounted thereon,
- a drive motor connected to the driving wheel for driving the drive shaft, and
- an overload clutch comprising a friction clutch having a pair of friction surfaces arranged between the driving wheel and the drive shaft.
Dependencies are inferred from the claim text.