Geometrical instruments – Straightedge type – Cord type
Reexamination Certificate
2005-08-23
2005-08-23
Smith, R. Alexander (Department: 2859)
Geometrical instruments
Straightedge type
Cord type
C242S390800, C242S596000, C033S761000
Reexamination Certificate
active
06931742
ABSTRACT:
Chalk line devices are commonly used in the building and/or construction arts. The motorized chalk line apparatus is particularly useful for automatically reeling in a chalk line wound about a spool that is journaled by a pair of stub axles. A battery powered drive automatically winds the chalk line about the spool. In use, the chalk line is manually pulled away from the apparatus to create the marking, but when the user actuates the switch, the spool automatically rewinds the chalk line.
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Pearce Kenneth F.
Smith R. Alexander
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