发明授权
- 专利标题: Electronic weighing scale
- 专利标题(中): 电子称重秤
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申请号: US450784申请日: 1982-12-17
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公开(公告)号: US4450924A公开(公告)日: 1984-05-29
- 发明人: Lothar Behrend , Eric Knothe , Franz-Josef Melcher , Jurgen Ober
- 申请人: Lothar Behrend , Eric Knothe , Franz-Josef Melcher , Jurgen Ober
- 申请人地址: DEX
- 专利权人: Sartorius GmbH
- 当前专利权人: Sartorius GmbH
- 当前专利权人地址: DEX
- 优先权: DEX3149989 19811217
- 主分类号: G01G23/48
- IPC分类号: G01G23/48 ; G01G7/04 ; G01G21/24 ; G01G1/38 ; G01G3/14 ; G01R17/06
摘要:
It is known in high-resolution electronic weighing scales based on the principle of electromagnetic force compensation that the load-dependent development of heat in a coil and a precision resistor can be compensated by sending an additional alternating current through the coil and the precision resistor which is complementarily regulated in its amplitude. In order to regulate the amplitude of this alternating current, the invention proposes a simplified circuit which comprises a highly temperature-dependent resistor, the resistance value of which is set at a fixed theoretical value.
公开/授权文献
- US5009616A Connector assembly with back shell having vanes 公开/授权日:1991-04-23
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