US3287775A - Buckles for safety belts and the like - Google Patents

Buckles for safety belts and the like Download PDF

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Publication number
US3287775A
US3287775A US40743164A US3287775A US 3287775 A US3287775 A US 3287775A US 40743164 A US40743164 A US 40743164A US 3287775 A US3287775 A US 3287775A
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Prior art keywords
plate
body
latching plate
body member
lip
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
William J Eubank
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American Safety Equipment Corp
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American Safety Equipment Corp
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    • AHUMAN NECESSITIES
    • A44HABERDASHERY; JEWELLERY
    • A44BBUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503Safety buckles
    • AHUMAN NECESSITIES
    • A44HABERDASHERY; JEWELLERY
    • A44BBUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • A44B11/25Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts with two or more separable parts
    • A44B11/2503Safety buckles
    • A44B11/2546Details
    • A44B11/2553Attachment of buckle to strap
    • A44B11/2557Attachment of buckle to strap with strap length adjustment
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00Buckles, buttons, clasps, etc.
    • Y10T24/45Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock]
    • Y10T24/45225Separable-fastener or required component thereof [e.g., projection and cavity to complete interlock] including member having distinct formations and mating member selectively interlocking therewith
    • Y10T24/45602Receiving member includes either movable connection between interlocking components or variable configuration cavity
    • Y10T24/45623Receiving member includes either movable connection between interlocking components or variable configuration cavity and operator therefor
    • Y10T24/45639Receiving member includes either movable connection between interlocking components or variable configuration cavity and operator therefor including pivotally connected element on receiving member
    • Y10T24/45644Receiving member includes either movable connection between interlocking components or variable configuration cavity and operator therefor including pivotally connected element on receiving member for shifting pivotally connected interlocking component

Description

Nov. 29, 1966 w. J. EUBANK 3,287,775

BUCKLES FOR SAFETY BELTS AND THE LIKE Filed Oct. 29, 1964 2 Sheets-Sheet 1 g 2 Fl G.1.

20a. Z9 Z841 4 34 32 77 6 75 77 4 INVENTOR.

WILL/AM d. ELIBANK Nov. 29, 1966 w. J. EUBANK 3,287,775

BUCKLES FOR SAFETY BELTS AND THE LIKE Filed Oct. 29, 1964 2 Sheets-Sheet 2 INVENTOR W/LL/Am J. EUBANK BY l 0! United States Patent 3,287,775 BUCKLES FOR SAFETY BELTS AND THE LIKE William J. Eubank, Livonia, Mich., assignor to American Safety Equipment Corporation, New York, N.Y. Filed Oct. 29, 1964, Ser. No. 407,431 6 Claims. (CI. 24-77) This invention relates to buckles for safety belts, and particularly to belts of the type used in airplanes, automobiles and for other purposes.

It is an object of the invention to provide a buckle of this kind which will meet all requirements for safety; which will be composed of relatively few operating parts; which will provide for a firm and secure latching effect, yet which will permit quick release when required.

More particularly, the invention contemplates the provision of a buckle including a rockably mounted springbiased latching plate located within it and with the spring thereof operative to normally urge the latching plate to an engaged position; of a cover member mounted on the body of the buckle and having a limited pivotal movement with respect thereto, said cover member being coupled to the latching plate in a manner to rock the plate to a position of release when the cover member is manually raised.

The invention further contemplates a manner of mounting the latching plate between the side walls of the body member and it' contemplates other structural features to be described hereinafter and more particularly pointed out in the claims appended hereto.

In the accompanying drawings, wherein an illustrative embodiment of the invention is disclosed,

FIG. 1 is a top plan view of the improved buckle and the connection plate therefor;

FIG. 2 is a longitudinal sectional view through the buckle;

FIG. 3 is a top plan view of the buckle with the cover member removed;

FIG. 4 is a side elevational view of the structure of FIG. 3;

FIG. 5 is a top plan view of the latching plate;

FIG. 6 is a sectional view taken substantially on the line 6-6 of FIG. 5, showing the latching plate in its engaged position;

FIG. 7 is a View similar to FIG. 6, but showing the latching plate disengaged from the connection plate;

FIG. 8 is a sectional view, taken substantially on the line 88 of FIG. 5, looking in the direction of the arrows, and

FIG. 9 is a view on a reduced scale, showing the inside face of the cover member with a part thereof shown fragmentarily.

Referring to the drawings, the body member of the buckle is generally indicated at 1 and the cover member therefor is indicated at 2. The body member 1 is provided with a bottom wall 3 and a pair of upstanding side walls 4. Adjacent to one end of the body member 1 is provided a cylindrical belt-engaging rod 5 provided at its opposite ends with flattened parts or lugs 6 which slidably fit in inclined slots 7 formed in the opposite side walls 4 of the body member. One end of the belt, shown at 8, is passed through an aperture 9 in the bottom wall 3 of the buckleand is looped around the rod 5 and then passed between the rod and a partition 10 extending across the interior of the body 1 and located adjacent to the rod 5. The belt is then passed out of the body 1 through the aperture 9 as clearly shown in FIG. 2. When pull is exerted on the belt-end 8, rod 5 is drawn toward the partition 10, and the belt portion extending over the rod is then clampingly held between rod 5 and the partition 10 and is thus maintained against slippage or displacement. The surface of the rod 5 is preferably knurled as shown in FIG. 3 and the partition as shown may be slightly bowed or curved, as seen in FIG. 3, to counteract strain imposed on it by the pull exerted on the belt. Partition 10 is further backed by lugs 11 formed out of the side walls 4 of the body 1.

A latching plate 12 shown in FIG. 5 is adapted for engagement by a connection plate or loop 20, the latter having the second end 21 ofthe belt attached thereto. The latching plate is formed with a transverse slot 13 and a depression 14, said depression resulting in the formation of a downwardly-projecting lip 15 that terminates in a shoulder 16 curved for swivel action with a curved edge 18 in a slot 19 in connection plate 20 as will appear.

Extending laterally from the opposite sides of the latching plate 12 are end lugs 17, each of these lugs fitting into a slot 18a in each of the side walls 4 of the body 1. As will be seen in FIG. 4, wherein the slot 18:: is slightly exaggerated to show its contour, it will be noted that the slot is so shaped that it will permit a rocking movement of the latching plate. This will be apparent from FIGS. 6 and 7. In FIG. 6, the latching plate 12 is shown in its lowered or locking position wherein it will be seen that its curved shoulder 16 is in engagement with the aforesaid correspondingly curved edge 18 of a slot 19 provided in the belt connection plate 20, the latter having as heretofore stated the second end 21 of the belt attached thereto. In FIG. 7 is shown the upwardly rocked or raised position of the latching plate and the shoulder 16 has risen out of the slot 19 to enable the connection plate to be withdrawn from the body 1 of the buckle by a pull exerted on said plate in the direction of arrow 22.

The purposeof curvature or radius on edge 18 of slot 19 of connection plate 20 and corresponding curvature or radius on edge or shoulder 16 for swivel action is to cause equal load distribution of rod or bar 5 on each side of body 1 after partition or buttress 10 deforms to a straight line upon application of excessive load. As heretofore stated, slots 18a are so shaped as to permit this rocking movement or inclination of the latching plate. For this purpose, the lug parts of latching plate 12 may be slightly inclined as illustrated at 17a in FIG. 2, if required, to facilitate the rocking movement of the plate.

At 23 is shown a leaf spring adapted to bias latching plate 12 in normal and depressed condition. To maintain said spring within body 1, and in the form illustrated, the spring has openings 24 along a transverse and. offset edge portion 2 6 abutting an end portion of body bottom wall 3, said openings being engaged or penetrated by protrusions 30 extending olf ribs or posts 39a from cover member 2 (FIGS. 2, 3 and 9). Spring 23 extends toward the opposite end of body 1 and is preferably provided intermediate its length with a slight protrusion 25 to bear against the part of the belt that extends over rod 5 in order to exert a slight frictional resistance for preventing rod 5 from rattling when the belt end 8 has no load on it. The end 26 of the spring 23 may also be confined and maintained in position in any other suitable Way to effectuate equivalent functions.

The arrangement of springs 23 is such that it bears down on latching plate 12 and normally maintains the same in its lowermost position with lip 15 resting against bottom wall 3 as shown in FIG. 2. When connection plate 20 is slid into position between lip 15 and bottom wall 3 of the body, latching plate 12 will be raised against the bias of spring 23 until its preferably curved shoulder 16 engages behind preferably curved edge 18 of slot 19. This engagement will be maintained until manual movement of the cover member is effected.

Connection plate 20 has a pair of shoulders 20a rearwardly of slot 19 and are adapted to serve as limiting stops for travel of plate 20 in conjunction with lower corner notches 4a at one end of the body side walls 4. In addition, guide lugs 27 for connection plate 20 are provided in body 1, the lugs as shown being punched out of the body side walls 4 for guiding movement of the connection plate thereunder to the engaged position with latching plate 12. Lugs 27 and the shoulder-notch 20a4a engagement resist shifting and impositionof torque with respect to connection plate 20 when in engaged position with latching plate 12.

Cover member 2 includes a top wall 28, side walls 41 and an integral inclined end wall 29, the latter wall being reinforced by aforementioned ribs or posts 39a. End wall 29 is provided with an inturned end 31 which extends under the end of the bottom wall 3 as shown in FIG. 2. Side walls 41 fit on the outside of the side walls 4 when the cover is in its closed position. At the opposite end, the cover member is formed with a rounded flange 32 constituting an extension of the top wall of the cover and forming a finger piece by which the cover can be raised to elevate the latching plate 12 to released position, as shown in FIG. 7. Engagement between cover 2 and latching plate 12 is suitably provided as by flange 39 extending from cover wall 33 to permit independent angular movement of the plate with respect to the cover. As shown for illustration, the flange may be removable. Thus, behind flange 32 is end wall 33 and there-behind is a pair of blocks 34 secured to the inside surface of the cover and the wall 33. Mounted on these blocks by means of screws 35 is an angle piece 3-6. Said angle piece has one of its flanges 37 accommodated in a groove 38 in the blocks 34 and its other flange 39 extends under the forward end of the latching plate 12. This arrangement is such that the cover cannot be separated from the body member without removal of the strip or angle piece 36, but it permits the latching plate and cover to have the required rocking movement or limited pivotal swing to enable the cover when lifted by movement of the finger piece 32 to elevate the latching plate in a manner to permit disengagement thereof from the connection plate 20.

From the foregoing, the operation of the improved buckle will be readily understood. When the connection plate 20 is inserted into the body of the buckle below the front end wall 33 of cover member 2 and along body bottom wall 3 by movement of the connection plate from the right as viewed in FIG. 1, it will be guided by side walls 4 below lugs 27, and as soon as the edge 18 of the slot 19 passes latching plate shoulder 16, the spring 23 will force the latching plate downwardly to enable shoulder 16 to enter behind the edge 18. The connection plate will thereupon be prevented from unintentional withdrawal from within the body 1. To release end 21 from the belt buckle the flange or finger piece 32 is engaged by the fingers and is raised to an extent to disengage the latching plate from the edge 18, whereupon the plate 20 can be withdrawn by movement thereof in the direction indicated by arrow 22 in FIG. 7.

Thus, the structure described is comprised of relatively few parts, has centering and reinforcing provisions to prevent jamming of parts under load to insure belt release and allows the connection plate to be inserted and removed at the same end of the buckle as the part thereof that is finger-engaged for the unlatching movement. The latter feature makes operation more natural to the user. Moreover, the structure possesses numerous other advan tages heretofore mentioned and also apparent to those skilled in this art.

Having thus described a single embodiment of the invention, it is obvious that the same is not to be restricted thereto, but is broad enough to cover all structures coming within the scope of the annexed claims.

I claim: 1. A buckle for safety belts adapted to be attached to an end of a safety belt section comprising, a body member, a latching plate rockably secured to the body member, said latching plate having a downwardly-bulged central portion and provided with an elongated slot at one edge of said central portion, the slot defining a lip along one edge disposed out of the plane of the body of the latching plate, spring means secured within the body member and operative on the latching plate to cause said latching plate to be resiliently held against the body member, a connection plate attached to an end of another safety belt section, said connectionplate having a slot opening into which the lip enters under the bias of the spring when the connection plate is slid into the body for positioning between said lip and body member, said slot opening in the connection plate having an edge engageable with said engaging lip to oppose withdrawal of the connection plate from the body, and a cover member havin a limited raising movement with respect to the body member and connected to the body member, complementary engaging means between the cover member and the latching plate so that the latching plate will be disengaged from the connection plate when the cover member is manually raised, said engaging lip having a curved edge and said slot opening edge in the connection plate being correspondingly curved for swivellable engagement therebetween.

2. A buckle for safety belts adapted to be attached to an end of a safety belt section comprising a body member having a bottom wall and spaced apart side walls, a latching plate having parts in engagement with the side walls for rocking movement of the latching plate, the latching plate having a lip, spring means operative on the latching plate to cause said latching plate to be resiliently held down with its lip disposed against the bottom of the body member, a connection plate attached to one end of another belt section, said connection plate having an aperture wholly surrounded by parts of said plate and into which the lip extends under the bias of the spring to enter said aperture and engage against the edge of the same, when the connection plate is slid into the body to position same between said lip and the bottom wall, and a cover member connected to the body member, said cover member having a limited raising movement with respect to the body member, a rod in the body member around which one end of the first mentioned safety belt section is looped, a curved partition in the body adjacent to said rod serving as a clinching bar in conjunction with said belt loop, said spring having a part operative frictionally against a portion of the :belt loop around the rod to prevent rattling, and means on the cover member for engaging with the latching plate so that the latching plate will be disengaged from the connection plate when the cover is manually raised.

3. A buckle for safety belts comprising, a body including side walls, slots in said side walls, a latching plate mounted between the walls and 'having lugs extending laterally from it and entering the slots, the slots being shaped to permit the latching plate to have a rocking movement, the latching plate having a protruding lip portion defining a slot alongside one edge of the lip portion and, caused to be raised or lowered by the rocking movement of the latching plate, a leaf spring anchored at one end of the body and extending toward the opposite end of the same and having a free end overlying the latching plate for biasing the latching plate in a manner to bring its lip adjacent to the bottom of the body member, a cover hingedly attached to the body, said cover having a ledge engaging under the forward portion of the latch ing member to thereby elevate the latching member and bring its lip away from the bottom of the body when the cover is manually raised.

' 4. A buckle for safety belts comprising, a body having side walls, slots in said side walls, a latching plate pivotally mounted in said slots, a centrally distorted part on the latching plate forming a lip on latching plate, the

plate having a slot opening extending along and exposing an edge of the lip, a belt connector attached to one end of a belt, said connector having a slot aperture into which the lip enters when the connector is entered into the body from one end thereof, a leaf spring Within the body for biasing the latching plate to connector-engaging position, a cover mounted over the body and having a limited pivotal movement relative to the body, said cover having a strip element engaging behind the latching plate so that raising movement of the cover will raise the lip out of the aperture in the connector, the cover having a lifting flange projecting beyond one end of the body for the manual raising of the cover, said flange being located at the same end of the body as the end where the connector is inserted into the body to bring the said connector to lip-engaging position in the body.

5. A safety belt buckle as provided for in claim 4, wherein the slots are shaped to permit tilting movement of the latching plate, the cover having an inturned end engaging with one end of the body, a rod in the body around which an end of the belt is looped, a curved partition in the body adjacent to said rod, and the leaf spring having a part operative frictionally against the portion of the belt looped around the rod.

6. A buckle for safety belts adapted to be attached to an end of a safety belt section comprising, a body member, a latching plate rockably secured to the body member, said latching plate having a downwardly-bulged central portion and provided with an elongated slot at one edge of said central portion, the slot defining a lip along one edge disposed out of the plane of the body of the latching plate, spring means secured within the body member and operative on the latching plate to cause said latching plate to be resiliently held against the body member, a connection plate attached to an end of another safety belt section, said connection plate having a slot opening into which the lip enters under the bias of the spring when the connection plate is slid into the body for positioning between the said lip and body member, said slot opening in the connection plate having an edge engagable with said engaging lip to oppose withdrawal of the connection plate from the body, a cover member havin a limited raising movement with respect to the body member and connected to the body member, complementary engaging means between the cover member and the latching plate so that the latching plate will be disengaged from the connection plate when the cover member is manually raised, a rod in the body member around which one end of the first mentioned belt section is looped and a curved partition in the body adjacent to said rod serving as a clinching bar in conjunction with said belt loop, said spring having a part operative frictionally against a portion of the belt looped around the rod to prevent rattling.

References Cited by the Examiner UNITED STATES PATENTS 2,635,317 4/1953 Harley 24-230 2,999,288 9/ 1961 Warner 24230 3,013,317 12/1961 Weber 24230 X 3,091,010 5/1963 Davis 24230 X 3,130,466 4/1964 Carter 24230 3,148,427 9/1964 Hoffstrom 24196 3,157,929 11/1964 Warner 24-196 3,170,211 2/1965 Van Noord 24-230 3,181,215 5/1965 Eberhart 2475 FOREIGN PATENTS 1,326,556 4/1964 France.

968,887 9/ 1964 Great Britain.

BERNARD A. GELAK, Primary Exam ner.

Claims (1)

1. A BUCKLE FOR SAFETY BELTS ADAPTED TO BE ATTACHED TO AN END OF A SAFETY BELT SECTION COMPRISING, A BODY MEMBER, A LATCHING PLATE ROCKABLY SECURED TO THE BODY MEMBER, SAID LATCHING PLATE HAVING A DOWNWARDLY-BULGED CENTRAL PORTION AND PROVIDED WITH AN ELONGATED SLOT AT ONE EDGE OF SAID CENTRAL PORTION, THE SLOT DEFINING A LIP ALONG ONE EDGE DISPOSED OUT OF THE PLANE OF THE BODY OF THE LATCHING PLATE, SPRING MEANS SECURED WITHIN THE BODY MEMBER AND OPERATIVE ON THE LATCHING PLATE TO CAUSE SAID LATCHING PLATE TO BE RESILIENTLY HELD AGAINST THE BODY MEMBER, A CONNECTION PLATE ATTACHED TO AN END OF ANOTHER SAFETY BELT SECTION, SAID CONNECTION PLATE HAVING A SLOT OPENING INTO WHICH THE LIP ENTERS UNDER THE BIAS OF THE SPRING WHEN THE CONNECTION PLATE IS SLID INTO THE BODY FOR POSITIONING BETWEEN SAID LIP AND BODY MEMBER, SAID SLOT OPENING IN THE CONNECTION PLATE HAVING AN EDGE ENGAGEABLE WITH SAID ENGAGING LIP TO OPPOSE WITHDRAWAL OF THE CONNECTION PLATE FROM THE BODY, AND A COVER MEMBER HAVING A LIMITED RAISING MOVEMENT WITH RESPECT TO THE BODY MEMBER AND CONNECTED TO THE BODY MEMBER, COMPLEMENTARY ENGAGING MEANS BETWEEN THE COVER MEMBER AND THE LATCHING PLATE SO THAT THE LATCHING PLATE WILL BE DISENGAGED FROM THE CONNECTION PLATE WHEN THE COVER MEMBER IS MANUALLY RAISED, SAID ENGAGING LIP HAVING A CURVED EDGE AND SAID SLOT OPENING EDGE IN THE CONNECTION PLATE BEING CORRESPONDINGLY CURVED FOR SWIVELLABLE ENGAGEMENT THEREBETWEEN.
US3287775A 1964-10-29 1964-10-29 Buckles for safety belts and the like Expired - Lifetime US3287775A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3505711A (en) * 1966-04-15 1970-04-14 Andrew G Carter Full-control safety-belt buckle
US3760464A (en) * 1970-01-02 1973-09-25 Davis Aircraft Prod Co Inc Safety buckle
US4890869A (en) * 1987-03-31 1990-01-02 Southco, Inc. Over-center draw latch
US20130292990A1 (en) * 2012-05-04 2013-11-07 Autoliv Asp, Inc. Light weight two-point aviation seatbelt

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635317A (en) * 1948-10-29 1953-04-21 Aerolex Ltd Quick-release fastener
US2999288A (en) * 1955-11-23 1961-09-12 Capewell Mfg Company Buckle assembly
US3013317A (en) * 1958-02-24 1961-12-19 William M Noe Metal-to-metal buckle
FR1326556A (en) * 1962-03-29 1963-05-10 Mecanique Du Ct Atel joining loop, in particular for safety belts
US3091010A (en) * 1962-04-27 1963-05-28 Frank L Davis Seat belt buckle
US3130466A (en) * 1961-02-06 1964-04-28 Andrew G Carter Simplified slide-action buckle mechanism
GB968887A (en) * 1961-06-15 1964-09-02 Stadium Ltd Improvements in buckles
US3148427A (en) * 1961-05-26 1964-09-15 Douglas Aircraft Co Inc Connectors
US3157929A (en) * 1962-05-22 1964-11-24 Capewell Mfg Company Adjustable strap connector
US3170211A (en) * 1963-05-16 1965-02-23 Kent Engineering Consultants Safety seat buckle
US3181215A (en) * 1963-03-28 1965-05-04 Eberhart Ray Safety belt buckle

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635317A (en) * 1948-10-29 1953-04-21 Aerolex Ltd Quick-release fastener
US2999288A (en) * 1955-11-23 1961-09-12 Capewell Mfg Company Buckle assembly
US3013317A (en) * 1958-02-24 1961-12-19 William M Noe Metal-to-metal buckle
US3130466A (en) * 1961-02-06 1964-04-28 Andrew G Carter Simplified slide-action buckle mechanism
US3148427A (en) * 1961-05-26 1964-09-15 Douglas Aircraft Co Inc Connectors
GB968887A (en) * 1961-06-15 1964-09-02 Stadium Ltd Improvements in buckles
FR1326556A (en) * 1962-03-29 1963-05-10 Mecanique Du Ct Atel joining loop, in particular for safety belts
US3091010A (en) * 1962-04-27 1963-05-28 Frank L Davis Seat belt buckle
US3157929A (en) * 1962-05-22 1964-11-24 Capewell Mfg Company Adjustable strap connector
US3181215A (en) * 1963-03-28 1965-05-04 Eberhart Ray Safety belt buckle
US3170211A (en) * 1963-05-16 1965-02-23 Kent Engineering Consultants Safety seat buckle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3505711A (en) * 1966-04-15 1970-04-14 Andrew G Carter Full-control safety-belt buckle
US3760464A (en) * 1970-01-02 1973-09-25 Davis Aircraft Prod Co Inc Safety buckle
US4890869A (en) * 1987-03-31 1990-01-02 Southco, Inc. Over-center draw latch
US20130292990A1 (en) * 2012-05-04 2013-11-07 Autoliv Asp, Inc. Light weight two-point aviation seatbelt
US9173456B2 (en) * 2012-05-04 2015-11-03 Autoliv Asp, Inc. Light weight two-point aviation seatbelt

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