Title:
【発明の名称】ミシンにおける下糸検知装置
Document Type and Number:
Japanese Patent JP2857880
Kind Code:
B2
Abstract:
A detecting electrode is mounted on the path of a thread in a sewing machine. When a cloth is sewn in the sewing machine, a bobbin thread or a needle thread moves spatially against the detecting electrode. An electric signal is obtained on the detecting electrode in response to such movement of the thread. On the other hand, a timing signal generator generates a timing signal synchronous with the vertical movement of the needle in the sewing machine. A discriminator receives the electrical signal from the detecting electrode and the timing signal from the timing signal generator. The discriminator compares the electric signal with a reference signal when it receives the timing signal and outputs a discrimination signal in accordance with the result of the comparison.
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Inventors:
SHIBATA YOSHIO
Application Number:
JP10517388A
Publication Date:
February 17, 1999
Filing Date:
April 27, 1988
Export Citation:
Assignee:
BARUDAN KK
International Classes:
B65H63/032; D05B51/00; D05B69/36; (IPC1-7): D05B51/00
Domestic Patent References:
| JP6338494A | ||||
| JP571389A |
Attorney, Agent or Firm:
Hiroshi Satake