Buckles – buttons – clasps – etc. – Bale and package ties – hose clamps – With tighteners
Patent
1987-11-05
1989-07-18
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Bale and package ties, hose clamps
With tighteners
24546, A44B 1302
Patent
active
048479578
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a multi-purpose clasp for ornament chains, key chains and fishing lines as well as for purposes in which the lock has to have a neat appearance, reliable locking, and easy operation, which lock can be made of any resilient material resistant to bending in such a way that it is one-piece in structure and comprises a locking bow, a spiral neck and a connection ring.
The most generally known locking means for ornament chains is a spring ring lock; besides, various kinds of other spring locks (carabine locks), hook means etc. as ornament chain clasps, dubble-spiral rings, mechanical lever-arm and the like key rings are generally used as locking means. However, none of known locking means is comparable to the multi-purpose clasp according to the invention in terms of the locking function, easy operation and structural solutions, nor has any suggestion of the solution according to the invention been found in the literature.
Even though the spring ring lock is world-widely the best-known and most generally used clasp for ornament and jewelry chains, it is nevertheless the least reliable. Having thin walls and open joints and being softened by the soldering of the connection ring, the tubular ring is easily distorted so that the locking tongue is not maintained in position but is passed out of the locking house, the spiral spring positioned within the ring gets stuck within the tube, if even a small amount of soap-containing wash water gets within the spring and dries therein, with the result that the locking tongue is stuck in place. Disturbances in the operation of carabine locks, which have a more durable structure, are mainly due to the fact that the spiral ring may become rusty or stick fast. A disadvantage of the above-mentioned locks as well as some other locks relatively rare in use is that they comprise projecting parts which easily catch external objects and that they are stiff or cumbersome in use and expensive.
By means of the multi-purpose clasp according to the invention a decisive improvement is achieved in the above disadvantages, because the clasp can be made of a variety of resilient materials resistant to bending and tested before the commencement of the manufacture. Furthermore, the manufacturing stage as well as the attachment of the clasp to the object can be carried out without any heat treatment deteriorating the resilience of the materials. Also, the clasp does not comprise any springs which would easily rust or get stuck or any other separate parts disadvantageous for the operation. Being entirely made of one and the same material piece, the clasp can be connected from the connection ring so that it resists the required pulling strain. The holding properties of the multi-purpose clasp are also superior, because the holding properties of the locking bow get better with an increase in the pulling force exerted on the clasp, and the clasp does not comprise any projecting parts which might catch external objects, such as hairs, knitted garments, stockings and the like. The manufacturing costs are also advantageous, because the clasp can be entirely manufactured by a bending method, and since no raw material is wasted, the price of the lock is low.
For the achievement of this object, the invention is characterized by the features disclosed in the characterizing portion of claim 1. The most important advantage of the invention over the prior art is that no heat treatment is required for the manufacture of the clasp nor for the reliable attachment thereof to a chain, so that the resilience and the bending strength of the lock remain such as they are defined before the commencement of the manufacture; that the clasps can be made by bending a certain length of thread material into an operative clasp body without any material wastes; that the clasp can be attached to a chain or the like so reliably that it can be compared to the connection between closed rings; that the clasp is not only easy to be locked and released but it also provides an absolutely reliable holding effe
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patent: 3335472 (1967-08-01), Shigemi Imai
patent: 3604066 (1971-09-01), Moon
patent: 3750240 (1973-08-01), Fridrich
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