FIELD: woodworking industry.
SUBSTANCE: invention relates to woodworking industry and can be used for measurement of longitudinal warpage (nonstraightness) of lumber, particularly board of length up to 6 metres and more. It is used tight string tangential to extremity of defined surface, bending deflection is measured by means of depth gauge, nodal point of which bears into measuring face, and thrust shoe is installed parallel to basic string, with visual inspection of parallelism by uniformity of luminous slot between block and string.
EFFECT: it is simplified and accelerated measurement procedure and it is provided availability of the method for operational control in working environment.
1 dwg
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SU911126A1 |
