With Adjustment Or Calibration Means Patents (Class 337/129)
  • Patent number: 8188831
    Abstract: A thermal overload relay includes a main bimetal for detection of an overload current, a shifter associated with the main bimetal, a release lever working according to a displacement of the shifter, a contact reversing mechanism for changing-over contacts by reversing action caused by rotation of the release lever, and a manipulation structure for manipulating the release lever and the contact reversing mechanism. The manipulation structure includes a reset bar for returning the contact reversing mechanism to an initial state. The reset bar is arranged to change-over between a manual reset state in which the reset bar can be pushed-in and an automatic reset state in which the reset bar is pushed-in and turned from the manual reset state and held in that state.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: May 29, 2012
    Assignee: Fuji Electric FA Components & Systems Co., Ltd.
    Inventors: Fumihiro Morishita, Yukinari Furuhata, Takeo Kamosaki
  • Patent number: 8086329
    Abstract: The present invention is related to a method of controlling a device having a calibration process. The calibration process has a partial calibration routine and a calibration routine. A detector within the control system is capable of receiving one or more input signals and determining whether a partial calibration or calibration should occur. The first step in the process involves starting the control method where the detector receives input signals or generates it own data within the detector. The detector also determines whether a partial calibration routine or a calibration routine will take place based upon the value of the input signals received. A partial calibration routine will be performed if the input signals to the detector do not favor a calibration.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: December 27, 2011
    Assignee: BorgWarner Inc.
    Inventors: Robert D. Keefover, Joseph Labataille
  • Publication number: 20110248815
    Abstract: In order to achieve thermomechanical overload protection with a broad adjustment range for protecting against overload currents, the live components carry an electrical current which is between the value of the overload current and zero. According to at least one embodiment of the invention, switching devices are used which, in a preferred embodiment, switch the current, in parallel, from a first current branch to at least one second current branch, the parallel-connected at least one current branch carrying a partial current, which is between the value of the overload current and zero. In the associated overload protection device, contact devices are provided which are associated with live components on two current branches which can be connected in parallel with one another, wherein at least one current branch can be switched on and off by the switching devices.
    Type: Application
    Filed: January 23, 2007
    Publication date: October 13, 2011
    Inventors: Wolfgang Feil, Andreas Kr├Ątzschmar, Fritz Pohl
  • Patent number: 7868731
    Abstract: A thermal overload relay is provided with an external case, and an adjustment dial with a cam inserted into an adjustment dial insertion hole provided in the external case for adjusting a settling current. A press-fitting section is provided at one of the adjustment dial and the adjustment dial insertion hole, and a locking section is provided at the other of the adjustment dial and the adjustment dial insertion hole. The press-fitting section is press-fit and retained in the locking section.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: January 11, 2011
    Assignee: Fuji Electric Fa Components & Systems Co., Ltd.
    Inventors: Yukinari Furuhata, Fumihiro Morishita, Takeo Kamosaki
  • Patent number: 4370692
    Abstract: A ground fault interrupter type device for protecting an electrical load device such as a range which has conductors supplied from a power source including overcurrent interruption means for interrupting the power source when a predetermined current threshold is exceeded. The electrical load device is subject to a first class of failure characterized by excessive current flow between at least one of the conductors and a ground reference point, with circuit current remaining at or below the predetermined current threshold; and to a second class of failure characterized by current through at least one of the conductors being above the predetermined current threshold. Failures of the second class include ground fault failures. In order to reduce the current interruption capability requirement for the ground fault interrupter device, there is included a means for preventing conductor interruption thereby in the event a failure of the second class occurs.
    Type: Grant
    Filed: July 13, 1981
    Date of Patent: January 25, 1983
    Assignee: General Electric Company
    Inventors: Carl E. Wellman, Jr., Richard E. Hornung
  • Patent number: 4054857
    Abstract: An adjustable time delay disconnect switch or hot wire relay for use with a ground fault circuit interrupter in a power circuit to a load, such as an electric range, to provide ground fault protection for any circuit of the range. The switch has normally closed switch contacts, a biased actuator plunger for opening the contacts, a biased latch for disabling the plunger, and an adjustable hot wire for releasing the latch and hence the plunger when the circuit is overloaded. The plunger is manually resettable when the circuit condition returns to normal.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: October 18, 1977
    Assignee: General Electric Company
    Inventor: Teamus Bowling
  • Patent number: 4030060
    Abstract: A multi-pole circuit breaker characterized by a circuit breaker structure including a releasable arm for opening a circuit through the breaker, a bimetal element for each pole which is responsive to an overload current condition to effect release of the releasable arm, a latch bracket and a trip bar coaxially mounted and having an adjustment screw to vary the position of the trip bar in relation to the bimetal to change thermal rating of the circuit breaker.
    Type: Grant
    Filed: February 26, 1976
    Date of Patent: June 14, 1977
    Assignee: Westinghouse Electric Corporation
    Inventors: Stephen A. Mrenna, Charles E. Haugh, Glenn R. Thomas