Spring coilable top reading rule with improved guide structure f

Details Spring coilable top reading rule with improved guide structure f Spring coilable top reading rule with improved guide structure f

1985-01-14

1986-04-01

Martin, Jr., William D.

Geometrical instruments

Area integrators

Electrical

242 848, 2421073, G01B 310

Patent

active

045788677

ABSTRACT:
A top reading power return rule has a shock-absorbing rib adjacent the spool, to prevent kinking upon retraction of the blade. The rib is positioned so as to be normally out of contact with the blade, but to intercept the blade when engagement of the hook member upon the casing causes it to abruptly stop and snap inwardly. The rib functions by decreasing the deflection of the taut blade about the small roller closest to the spool; excessive deflection is also avoided by providing a contact surface portion on the rib that is of relatively large area.

REFERENCES:
patent: 2207277 (1940-07-01), Volz
patent: 3255531 (1966-06-01), Anderson
patent: 3281943 (1966-11-01), Maksim, Jr.
patent: 3493190 (1970-02-01), Quenot
patent: 3494038 (1970-02-01), Quenot
patent: 3731389 (1973-05-01), King

Affiliated with

Also associated with

Rating

Spring coilable top reading rule with improved guide structure f does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spring coilable top reading rule with improved guide structure f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spring coilable top reading rule with improved guide structure f will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1077687