Preface: The purpose of this section is to provide background and examples of links
and studs as defined in Div IV, Section 6 in the
NBS Classification Guide1
(Blue Book). In the past, studs and links were
assigned separate sections in Division IV of the Blue Book. This separation was most likely created to simplify
competition definitions and was arbitrarily based on the mechanical features
for attachment to the garment (links were button-like objects with movable
parts and studs were button-like objects with a post or rod attached to a
foot that has no movable or separable parts). The current Blue Book brings
links and studs into a single section to better facilitate an understanding
of their history and
usage.
Click your mouse on any of the images below to see actual patent
document for link/stud shown
Links to the patents open in a new page or tab. Just
close the new window or tab to return here.
Patents for Separable Links
Patents for Non-Separable Button Links and Toggles
Patents for Non-Separable
Hinged Foot Links
Patents for Non-Separable Prong
or Wing Closures
Patents for Non-Separable
Bullet Toggle (Rotating bar)