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US 7,451,929 B2Granted
Methods and apparatus for monitoring electrical contacts
AssigneeSymbol Technologies, Inc.
InventorRobert W. DiGiovanna
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for monitoring electrical contacts comprising measuring a first voltage across a connection between a device and a base, charging a power source in the device, measuring a second voltage across the connection, determining a difference between the first voltage and the second voltage and initiating a signal alarm if the difference is greater than a predetermined threshold value. The device may be maintained by a management system.
Claims18
A method of monitoring electrical contacts comprising:
- measuring a first voltage across a connection between a device and a base;
- charging a power source in said device;
- measuring a second voltage across said connection;
- determining a difference between said first voltage and said second voltage;
- and
- initiating an alarm signal if said difference is greater than a predetermined threshold value.
3 more elements
An electrical contact monitoring system comprising:
- memory including a monitoring process comprising:
- measuring a first voltage across a connection between a device and a base,
- charging a power source in said device,
- measuring a second voltage across said connection,
- determining a difference between said first voltage and said second voltage, and
- initiating an alarm signal if said difference is greater than a predetermined threshold value.
3 more elements
A scanner comprising:
- a scan module;
- electrical contacts;
- a power source;
- and
- memory including a monitoring process comprising,
- measuring a first voltage across a connection between a device and a base,
- charging a power source in said device,
- measuring a second voltage across said connection,
- determining a difference between said first voltage and said second voltage, and
- initiating an alarm signal if said difference is greater than a predetermined threshold value.
7 more elements
Dependencies are inferred from the claim text.