Source: http://www.google.com/patents/US2853759?dq=5708422
Timestamp: 2017-08-20 00:58:00
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Patent US2853759 - Releasable connector - Google Patents
www.google.comhttp://www.google.com/patents/US2853759?utm_source=gb-gplus-sharePatent US2853759 - Releasable connector
Publication number US2853759 A
Publication number US 2853759 A, US 2853759A, US-A-2853759, US2853759 A, US2853759A
Inventors Edwin C Elsner
US 2853759 A
Sept. 30, 1958 E. c. ELSNER RELEASABLE CONNECTOR Filed July 12. 1954 IN VEN TOR. L DW/A/ C .51 SA/ER A TTORNEY United States Patent O V 2,853,759 i. Sep
RELEASABLE CONNECTOR Application July 12, 1954, Serial No. 442,821
7 Claims. C1. 24-230) This invention relates .to means for releasably connecting two cords, ropes, or similar structures, or connecting the two ends of a cord or rope.
It is an object of this invention to provide a. connector that is adapted to be subjected to strong pull between cord or rope ends which the same connects, and yet-is adapted to be manually released with but little expenditure of force. Usually, a connector or buckle under great tension force requires a substantial application of power to effect release. This is mainly brought about by the necessity for manually overcoming, at least, a material part of the tension imposed on the connector by the cord, rope or strap ends it connects. The present connector embodies a manually operable release member that is I not subject to the pull between the cord ends and has imposed on it only a small resultant component force offering immaterial resistance to manual operation of the release member. I y
Another object of the invention is to provide a connector, as above indicated, that safely and surely connects to cord ends and, upon release, suddenly separates thereby insuring dependable release of the connector and separation of the cord ends held connected thereby.
Fig. l is an end elevational view of a connector according to the present invention.
.Fig. 3 is a side elevational view.
Fig. 4 is a longitudinal sectional view as taken on the plane of line 44 of Fig. 1.
Fig. 5 is a longitudinal sectional view as taken on a plane transverse to the plane of section of Fig. 4 and through the center of the connector.
The releasable connector that is illustrated comprises, generally, connector parts 10 and 11, a releasing member 12 slidably engaged over the connector parts, and means 13 resiliently biasing said member 12 in position to retain connection of the parts 10 and 11 and manually movable to a position effecting release of said parts 10 and 11. Cord ends or the like 14 and 15 are connected to connector parts 10 and 11, respectively.
The connector part 10 comprises a generally flat body 16 that is provided at one end with an eye 17 or the like,
that is defined between opposed inwardly directed lugs 19. The latter extend from neck portions 20 of body 16, Said lugs, neck portions, and the adjacent end of body 16, enclose a transverse slot 21 that constitutes an enlargement of bifurcation 18. Said lugs are provided with edges 22 that are sloped downward from the front to the back of member 10 and, therefore, form inclined cam faces. Centrally of body 16 there is provided a longitudinal slot 23.
The connector part 11 has an eye 24 adapted to be connected to cord end 15. Said eye is formed on the end of a tab 25 from which extend integral trunnions 26. Said tab 25 is designed toloosely fit in the bifurcation 18 while the trunnions 26 extend loosely into the opposite ends of transverse. slot 21. The thickness of connector parts 10 and 11 is the same but, in any case, the part 11 should not be thicker than part 10 although it may be slightly thinner.
The releasing member 12 comprises a sleeve of flattened form to encircle part 10 which is slidably fitted in a longitudinal passage 27 of said sleeve. The opposite sides or walls 28 and 29 of said sleeve are preferably flat, as shown, and one or, both said sides may be provided with the legend Pull together with arrows' 30 designating the direction of pull or movement 'ofmember 12 relative to part 10. The edges of member 12'are preferably rounded and may have transverse grooves 31 therein that minimize finger slippage when manually slid relative to connector part 10.
p The front wall 28, in the portion overlying the bifurca tion 18 and slot 21, is recessed downward from the top edge 32 to provide, first, a relatively wide opening 33 which conforms in size to the size of the lugs 19 and, then, a relatively narrow opening 34 which conforms in size to the size of the tab 25. The opening 33 .has substantially the same width as slot 21 and Opening 34'substantially the same width as bifurcation 18. The back wall 29 is provided with an opening 35 that is the same width as and in register with opening 34, said opening 35 extending to edge 32. Because of the openings 34 and 35, the part 11 is pivotally connected to part 10, as shown in Fig. 5.
From the above it will be clear that walls 28 and 29 retain trunnions 26 in slot 21 when the top edge 36 of part 10 is in substantial alignment with the top edge 32 of member 12. However, when member 12 is slid or retracted in the direction of the arrows 30, the slot 21 will be exposed by the opening 33 of the front wall. Therefore, when the trunnions 26 are forced into engagement with cam edges 22 by an opposite pull on the cord ends 14 and 15, said cam edges will laterally displace said trunnions out of the slot 21 and effect separation of connector part 11 from part 10.
The means 13 that resiliently biases member 12 to trunnion-trapping position comprises a pin 37 that extends through slot 23 in body 16 of part 10 and is riveted into the walls 28 and 29, and a coil spring 38 disposed within said slot with one end in abutment with said pin and the other abutting the lower end of said slot. Thus, spring 38, by pressing pin 37 against the upper end of slot 23, exerts a resilient force that biases member 12 to connector parts connecting position.
In use, the tension on the connector holds the same in a stationary position since cords 14 and 15 are taut under the force applied. To release the connector, it is only necessary to pull on the member 12 in the direction of the arrows 30 and, therefore, effect separation as above indicated.
It will be noted that the only force on member 12, other than the light one imposed by spring 38, is the angular component of the force imparted on trunnions 26 by cam edges or faces 22. This latter force offers immaterial-resistance to slidingr'novement of member '12. Hence, the release member 12 can be easily operated regardless of the magnitude of the tension on the connector.
While the foregoing hasillustratedtand described what is new contemplated to .b e th e' bestimode of carrying out the invention, the construction is, ofmcourse, subject'to modification Without departingfronrthespiritand scope of the invention. It is, theref0re, not;desired to rrestrict theinvention to the particular form .ofrconstruction illustr'ated and described, but to. cover allrnodilications that may vfall within the scope of. theappended claims.
Having thus described the invention, whatzis-claimed and desired to besecured by LettersPatent is:
1. .A connector comprising aaparLpiiovided with; oppositely directed .trunnions a second.-.part;provided-- with opposed inwardly directed. lugsrengaged by saidv trunnions when the partsiarevpulled awayufrom. each other,
a sleeve slidingly engaged overqsaidtparts and provided with portions in lateral engagement with said trunnions, an'd'resilient means holding said sleeve projected in said trunnion-engaging position, said sleeve being: manually retractable to move the mentionedsleeve. portions out-of engagement with said trunnions.
-2. A connectoraccording to-claim 1:.said-1ugs..being provided with sloping faces adapted to be engaged by said trunnions that are disposed at a forwardand outward angle with respect to the sleeve.portionsuthat are engaged with the trunnions.
3. A connector according to claim 1: ssaid fllugstb'eing provided with cam faces that areengaged bythe .trunnions and said faces lbeing'so directedas to laterally displace said trunnions upon retraction of the. sleeve.
4. A connector comprising'a 'part providedwith oppositely directed trunnions, a second part provided with opposed inwardly directed lugs engaged byfsaidtrunnions' when the parts are punedawa 'rmm each other, a sleeve slidingly engaged .overIsaidparts andprovided with portions in lateral engagement with said trunnions,
and resilient means holdingsaid-sleeve projected :in' said 4 trunnion-engaging position, said sleeve being manually retractable to move the mentioned sleeve portions. out of engagement with the trunnions, said second-mentioned part having a longitudinal slot therein, a pin carried by the sleeve and extending through said slot to, thereby, limit retractive movement of the sleeve.
5. In a separable connector, a part provided with spaced inwardly directedlugshaving sloping faces, a second part provided with oppositely directed trunnions disposed between the lugs with thetrunnions in contact with the sloping faces, and retractable means overlying the trunnions and retaining the 'same in engagement with the sloping lug faces while said parts are being pulled opposite directions.
6. In a separable connector, apart provided with spaced inwardly dircted liigs having sloping faces, a second part provided with oppositely directed trunnions disposed between the lugs with the trunnions in contact with the sloping faces, -'and :retractable means overlying the trunnions and retaining'the same inengagement'with the sloping lug faces-while said-parts are being pulled in-opposite .directionsysaid retractablesimeans comprising a sleeve carried by the first m'entionedpart and having p0rtions overlying the trunnions.
7. A connector. comprising a part provided with a pair of opposite and outwardly directed trunnions, a second part provided with oppositeandinwardly directed lugs, said lugs having .camedges'engageable by said trunnions 1 when saidparts are connected, a retractable sleeve slidingly engaged oversaidparts, said sleeve having openings in each. wall'of. greater width than the Width of said first mentionedtpart, and means :to .retract said sleeve.
. References Cited'in the file'of this patent UNITED STATES'PATENTS Hopewell Sept. 14, 1948
US244475 * May 31, 1881 Jul 19, 1881 Spring-fastening for harness
US842482 * Jun 27, 1906 Jan 29, 1907 Gustave Matson Hay-sling lock.
US2305234 * Mar 4, 1942 Dec 15, 1942 American Chain & Cable Co Detachable strand connector
US2449167 * May 8, 1946 Sep 14, 1948 Hopewell Lester H Head and socket separable safety fastener
US3130466 * Feb 6, 1961 Apr 28, 1964 Andrew G Carter Simplified slide-action buckle mechanism
US3152377 * Jan 23, 1961 Oct 13, 1964 Carter Eng Co Buckle for safety belts
US5005268 * Dec 11, 1989 Apr 9, 1991 Hartmann Gyoergy Watch band or bracelet closure
US7353665 * Jul 27, 2005 Apr 8, 2008 Spectrum Gems, Inc. Clasps, interchangeable jewelry pieces, and methods for connecting the same
U.S. Classification 24/656
International Classification B64D25/06, A44B11/25
Cooperative Classification B64D25/06, A44B11/2534
European Classification B64D25/06, A44B11/25B4