Winding – tensioning – or guiding – Reeling device – With spring motor
Patent
1995-04-20
1997-04-29
Jillions, John M.
Winding, tensioning, or guiding
Reeling device
With spring motor
33767, B65H 7548, G01B 310
Patent
active
056240856
ABSTRACT:
The present invention is directed to provide a tape measure which is capable of applying a frictional braking force to a winding reel by using a simple mechanism that may produce a larger friction force acting on the reel when winding a measuring strip downward into the housing. A housing accommodates a winding reel having a bearing rotatably supported by a supporting shaft. The winding reel contains a driving spring. The supporting shaft has a sectional form represented by a combination of two arcs, one of which has a large radius and the other has a small radius. In case of drawing a substantially horizontal measuring strip into the housing with the bearing being supported by large diameter portion of the supporting shaft, the winding reel whose bearing is loosely fitted on the supporting shaft may dance in the housing at an increased speed of its rotation and, at the same time, may contact at its projecting circumferences and side surfaces with the inside wall of the housing. The rotation speed of the winding reel can be reduced by the friction. In case of drawing the measuring strip into the housing placed with its port upward, the winding reel is supported at its bearing by the small diameter portion of the supporting shaft (1a) and rotates, keeping contact of its projecting circumference with the guide portion of the housing, being subjected to a large friction force.
REFERENCES:
patent: 703709 (1902-07-01), Olmstead
patent: 3318550 (1967-05-01), Quenot
patent: 4687155 (1987-08-01), Burton
patent: 4907348 (1990-03-01), Hubbard
Patent Abstracts of Japan, vol. 012, No. 081 (M-676), 15 Mar. 1988 & JP-A-62 222978 (NHK Spring Co. Ltd.), 30 Sep. 1987.
Jillions John M.
Kyoto Measuring Instruments Corp.
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