Collapsible Restraint for Measuring Tapes.

A collapsible restraint is provided for attachment to the end of a flexible measuring tape in order to allow the thickness of a material, such as an ice layer covering a lake or other body of water, to be measured through a hole in the material. The collapsible restraint includes first and second pi...

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Bibliographic Details
Main Author: Ueda,H T
Other Authors: DEPARTMENT OF THE ARMY WASHINGTON DC
Format: Text
Language:English
Published: 1983
Subjects:
Snow
Ice and Permafrost
*Patents
*Gages
Ice
Thickness
Holes(Openings)
Tapes
Restraint
Mechanical components
Collapsible structures
*Measuring tapes
PAT-CL-33-137R
Pivot
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADD010890
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADD010890
Description
Summary:A collapsible restraint is provided for attachment to the end of a flexible measuring tape in order to allow the thickness of a material, such as an ice layer covering a lake or other body of water, to be measured through a hole in the material. The collapsible restraint includes first and second pivotally connected blades which are maintained in a fully extended position by a locking arrangement to allow the blades to engage the bottom opening of the hole. The locking arrangement can be disabled by an upward pull on the flexible measuring tape in order to cause the blades to pivot to a collapsed position, thereby permitting the restraint to be withdrawn from the hole. Supersedes PAT-APPL-316 205-81.

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