Buckles – buttons – clasps – etc. – Strap-end-attaching devices – Buckle connected
Patent
1998-06-25
2000-01-18
Sakran, Victor N.
Buckles, buttons, clasps, etc.
Strap-end-attaching devices
Buckle connected
24 71J, 24115G, 24265WS, A44C 500
Patent
active
060147938
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for attaching the end of a strap-like member, notably a bracelet, to an object, notably a watch, comprising a housing provided with two latch pins adapted to be received in facing recesses of the object, one of these pins being able to occupy two positions, a first position in which it protrudes from said housing to come to engage in one of said recesses of the object, and a second position in which it is retracted, biasing means tending to return this pin into one of these two positions, and a movable control member accessible from outside the housing associated with a cam for moving this pin into the other of said positions against the action of said biasing means.
Such devices are employed principally for attaching the ends of a bracelet to a watch, or of a strap to an article of leatherware, or in the field of jewelry for attaching together the two ends of a bracelet or a necklace. For wrist-watch bracelets, these devices usually include a tubular body called a bar from whose ends two pins (or lugs) protrude for engagement in axially aligned holes that are usually provided in the watchcase horns. For this purpose, at least one of these pins is slidably mounted in the bar and is pushed into its protruding position by a spring housed inside the bar's body. As a result, the operation consisting in securing this device between the watchcase horns necessitates inserting the bar in a loop formed at the end of the bracelet or in a cylindrical passageway of a metallic bracelet, inserting one of the pins into one of the holes in the horns, and then pushing in the other pin against the action of the spring in order to be able to insert it between the horns. Lastly, the end of this pin has to be brought into alignment with the other hole in the horns for it to be pushed therein by the spring.
This operation is not easy to carry out for anyone unfamiliar with it. Because of the pressure exerted by the spring on the pin, the pin often springs out before it can be inserted between the horns. Once the pin has been inserted between the horns, it can still slip out from between the horns and spring out while one is trying to find the location of the hole for receiving the latch pin, which means that the operation has to be started afresh.
Numerous solutions have been proposed to facilitate fitting a bracelet to a watch. In Swiss Patent CH 640 097, it was proposed to control two retractable latch pins by means of a sliding piece acting on two cams, each of the pins being solid with a lever pivoting in a plane through the longitudinal axis of the pin, which moves with a circular, non-sliding movement.
The use of pivoting levers however occupies too much space for the device to be housed in a bar, and necessitates using a housing of much greater volume. As a result, it cannot be housed in a loop at the end of a bracelet in the same way as for a conventional bar.
In U.S. Pat. No. 3,036,353 there has already been proposed a clasp for connecting the two ends of a strap to one another, in which two push-pieces mounted slidably in opposite directions each have a cam engaging with a surface of a locking latch movable perpendicular to the sliding axis of the actuating push-pieces and pressed against these cams by a biasing spring. By pushing the two push-pieces towards one another, this movement is transmitted to the latch which is moved against the action of the biasing spring.
A device for axially moving apart two latch pins of a bracelet is described in U.S. Pat. No. 2,807,855. This device comprises two levers pivoted about a common axis and whose respective ends are elastically applied against the inner ends of the pins by a spring tending to move the arms angularly away from one another. This device has no cam and no means is provided for retracting the pins when it is desired to remove the bracelet from the watch.
In Swiss Patents CH 684 728 and CH 322 135 there have also been proposed bar attachment devices wherein the latch pins cooperating with the horns are directly associated
REFERENCES:
patent: 2807855 (1957-10-01), Rodriguez
patent: 3036353 (1962-05-01), Minutoli
patent: 3550893 (1970-12-01), Waitzkin
patent: 4217681 (1980-08-01), Grohoski et al.
patent: 4622723 (1986-11-01), Krauss
patent: 5313691 (1994-05-01), Hashimoto
patent: 5345657 (1994-09-01), Shimizu
patent: 5457860 (1995-10-01), Miranda
Browning Clifford W.
Mady's Time Properties LLC
Sakran Victor N.
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