Invention Grant
- Patent Title: Overload fault condition detection system for article destruction device
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Application No.: US14331186Application Date: 2014-07-14
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Publication No.: US10005084B2Publication Date: 2018-06-26
- Inventor: Josh Davis , Jeffrey Jensen , Li (Henry) ZhiGuo , Hua (Kevin) Ren
- Applicant: STAPLES BRANDS INC.
- Applicant Address: US MA Framingham
- Assignee: STAPLES BRANDS INC.
- Current Assignee: STAPLES BRANDS INC.
- Current Assignee Address: US MA Framingham
- Agency: Sheridan Ross P.C.
- Main IPC: G08B21/18
- IPC: G08B21/18 ; B02C18/00 ; G08B5/36 ; B02C18/16

Abstract:
An article destruction device includes an electric motor driving at least one moving component. An indication panel includes at least three visual indicators situated in sequence. Each visual indicator is associated with a stage of an approaching overload (motor cool down) condition. A first visual indicator lights when the motor or corresponding sensor temperature is below a first threshold, i.e., when the device is first powered on. A second indicator lights when the temperature exceeds the first threshold and is below at least a second threshold, i.e., the temperature is approaching a fault condition. A last visual indicator lights when the temperature exceeds the first and the at least second thresholds, i.e., the fault condition is met. A thermistor on the motor energizes (self-heats) with the motor. A thermostatic switch controls current flow through windings of the motor depending on measured temperatures meeting operating and equilibrium temperature thresholds.
Public/Granted literature
- US20150014456A1 OVERLOAD FAULT CONDITION DETECTION SYSTEM FOR ARTICLE DESTRUCTION DEVICE Public/Granted day:2015-01-15
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