Sewing machine
AssigneeMefina S.A.
InventorsHenri Duret, Antonio Jimenez, Jacques Matthey, Michel Combepine
Life of this patent
Estimating the term…
Abstract
A sewing machine is disclosed having an electric circuit divided into a first high-voltage section and a second low voltage section. The second section is supplied via a step-down transformer connected to the first section. The second section has a rectifier connected to the output of the transformer for dispensing DC power to the functional elements of the machine. The first circuit section, the transformer and some elements of the second section are contained in a remote housing which is separate from the machine and is linked to it by a cable. A foot pedal for actuating the machine is integral with the housing.
Claims9
An electric low voltage sewing machine, comprising:
- a casing;
- a high voltage circuit section;
- a low votlage circuit section having first and second circuit portions, said first portion of said low voltage circuit section generating a low votlage output and said second circuit portion comprising a motor;
- a step down transformer having primary and secondary windings connected to said high voltage circuit section and to said first portion of said low voltage circuit section, respectively;
- first means for connecting said first portion of said low voltage section to said second portion of said low voltage section to present said low voltage output to said second circuit portion in a substantially unchanged form;
- and
- a foot pedal actuator having a housing containing means for controlling the machine, said high voltage circuit section, said transformer and said first portion of said low voltage circuit section;
- wherein said second circuit portion is disposed in said casing.
A machine as in claim 8, further comprising:
- a buffer battery having terminals;
- a voltage regulator having a first input connected to the output of a charger and a second input connected to said terminals of said battery;
- means for comparing the value of the voltage at said first input and the value of the voltage at said second input;
- second means for connecting the terminals of said battery selectively to said charger output, if the voltage at said second input of the regulator is lower than the voltage at said first input thereof, and to said second portion of said low voltage circuit section through said first means, if the voltage at said second input of the regulator is higher.
An electric low voltage sewing machine, comprising:
- a casing;
- a high voltage circuit section;
- a low voltage circuit section having first and second circuit portions, said second portion comprising a motor and a rectifying assembly;
- a step down transformer having primary and secondary windings connected to said high voltage circuit section and to said fist portion of said low voltage circuit section, respectively;
- first means for connecting said first portion of said low voltage section to said second portion of said low voltage section;
- and
- a foot pedal actuator having a housing containing means for controlling the machine, said high voltage circuit section, said transformer and said first portion of said low voltage circuit section;
- wherein said second circuit portion is disposed in said casing.
Dependencies are inferred from the claim text.