Spring bar
A spring bar is a small axis with spring-loaded pins for attaching the bracelet to the lugs (synonymous with horns) of the watch case of a wristwatch .
While wristwatch cases mostly had fixed bars up until the 1950s, which required the use of special straps that were open at the ends, today they are fastened using spring bars. Depending on the size of the watch, there are spring bars from 6 to (now) 40 mm in length, and there are also different diameters. Spring bars are usually straight, but there are also curved ones. However, since curved spring bars are only rarely required, curved spring bars can be made from straight bars with a special bending tool in order to reduce storage in specialist shops and workshops.
The spring bar consists of a tube with a spring inside . At both ends of the tube are pins used. At rest, the cones protrude from the tube. Both pegs can be pressed into the tube, but the spring force returns them to their original position.
To attach the bracelet to the watch, the spring bar is pushed into the loop at the end of the bracelet. There are holes in the lugs of the watch case (as blind holes or through holes ). The first peg is inserted into one of the holes. The second pin is now pressed into the spring bar by means of the spring bar tool and brought into the correct position at the opposite hole in the watch case. When the spring bar tool is removed, the pin snaps into the hole.
In addition to the conventional spring bars, which are usually used to attach bracelets to the watch case, there are also various special types, e.g. T. for metal straps and buckles, such as lock bars with short pins, with extra thick pins, spring bars without attachment, with negative pins, with lateral actuation pin, etc.
Frequently used materials are, besides the stainless steel commonly used today, also brass and nickel silver .
Web links
- Spring bar watch-wiki
Individual evidence
- ↑ Fritz von Osterhausen: Callweys lexicon ; Munich 1999; ISBN 3-7667-1353-1 ; P. 99.