The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1998
Filed:
Apr. 10, 1996
Yuji Nishizawa, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A control unit including an inverter (1) and a terminal block (2) connectable to wires (8) in which an external signal for the inverter (1) is directly delivered to the inside of the inverter (1) when a first additional device (3a) is not connected to the inverter (1), and an external signal for the inverter (1) is delivered via an internal circuit in a first additional device (3a) to the inside of the inverter (1) when the first additional device (3a) is connected to the inverter (1). The terminal block (5) includes screws (14) for connection to external signal wires (8) and upper and lower sets of contact pieces (15, 16) that can be pressed together or shorted when the inverter (1) is not connected to the first additional device (3a). The first additional device includes pins (4a) having separate upper and lower contact surfaces (51a, 51b) so that when the pins are received and clamped between the contact pieces (15, 16), the current path is diverted through the additional device and then back into the inverter. A substrate (33) having separate upper and lower contact surfaces (34a, 34b) can also be used. Further additional devices may be mounted in a sequential manner with current diversion into the additional devices. The inverter and additional devices also include aligned heat radiating pins (11a).