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US 5,467,658 AGranted
Escalator defective roller detector
OwnerRobert D. Buckalew, Michael E. Neitzkeinventors
Life of this patent
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Abstract
A portable testing and recording system for detecting defective escalator rollers. The system incorporates a level sensitive detector which actuates an audible, visual and/or marking indicator to alert a repair person to properly identify a defective roller and/or related parts.
Claims16
A portable escalator testing device comprising:
- a framework support means;
- a step level detection means for detecting a change in vertical level of an escalator step;
- a marking means operatively connected to said framework support means;
- an indicator means operatively connected to said framework support means;
- said framework support means supporting both said step level detection means and said marking means, and
- wherein a detected change in said vertical level of said escalator step within a predetermined range actuates said indicator and/or marking means.
3 more elements
A portable escalator testing device for testing escalator step height malfunctions comprising:
- a support framework means;
- a step level detection means for detecting a change in vertical level of an escalator step;
- a spray paint can holder and actuator;
- an indicator means including audible and/or visual indicators;
- said framework support means supports both said step level detection means, said spray paint can holder and actuator, and
- wherein a detected change in said vertical level of said step within a predetermined range actuates said spray can actuator and/or said audible and/or visual indicators to indicate an escalator in need of repair.
3 more elements
A method for the testing and marking of escalator steps comprising:
- securing a portable testing unit to a platform of said escalator;
- calibrating said portable testing unit with respect to a first step of said excalator steps;
- using said portable testing unit to detect a vertical height variation of each of said steps starting with said calibrated first step;
- determining a vertical height variation which is outside a predetermined range, and
- actuating a marking means to identify each step outside of said predetermined range.
2 more elements
Dependencies are inferred from the claim text.