US2948940A - Self-locking detachable clamp - Google Patents

Self-locking detachable clamp Download PDF

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Publication number
US2948940A
US2948940A US669351A US66935157A US2948940A US 2948940 A US2948940 A US 2948940A US 669351 A US669351 A US 669351A US 66935157 A US66935157 A US 66935157A US 2948940 A US2948940 A US 2948940A
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United States
Prior art keywords
element
clamp
portion
middle portion
middle
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Expired - Lifetime
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US669351A
Inventor
Louis F Degener
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Sperry Corp
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Sperry Rand Corp
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Publication date
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Priority to US669351A priority Critical patent/US2948940A/en
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Publication of US2948940A publication Critical patent/US2948940A/en
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Expired - Lifetime legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/08Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
    • F16L3/12Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing
    • F16L3/13Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing and engaging it by snap action
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B2/00Friction-grip releasable fastenings
    • F16B2/20Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening
    • F16B2/22Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material
    • F16B2/24Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal
    • F16B2/241Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal
    • F16B2/245Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal external, i.e. with contracting action
    • 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
    • Y10T403/00Joints and connections
    • Y10T403/39Rod to member to side, e.g., plate, rod side, etc.
    • Y10T403/3906Rod side to member to side

Description

Aug. 16., 1960 L. F, DEGENER SELF-LOCKING DETACHABLE CLAMP Filed July 1, i957 INVENTOR LOUIS F. DEGENER BY 7 ifl oRNEv/ SELF-LOOKING DETACHABLE CLAMP Louis F. Degener, South Ozone Park, N.Y., assignor to Sperry Rand Corporation, Great Neck, N.Y., a corporation of Delaware Filed July 1, 1957, Ser. No. 669,351

2 Claims. (Cl. 24-257) This invention relates to small spring clamps for detachably mounting small diameter rods, tubes or cables on a fixed base. To attach such an element to my improved clamp, all that need be done is to force it between the two spring jaws of the clamp but once in position the element is firmly held against vibration and cannot be released by pulling or pushing on the element, my clamp being so designedtha-t any attempt to remove the element from its jaws by direct force causes the jaws to more tightly grip the element. However, the element may be released readily with one hand by pressing backwardly the upper part of the spring clamp while pulling the element outwardly; The clamp is-so designed that it will not chafe the element or open, even when subject to severe vibration, and will continue to operate satisfactorily even at temperatures as high as 800.

Referring to the drawings showing a preferred form of the invention,

Fig. 1 is a perspective view of my spring clamp with no supported element therein;

Fig. 2 is a similar perspective view showing the position of the two parts or jaws after the element to be clamped has been inserted by pressing the element between the upper and lower spring jaws;

Fig. 3 in a side elevation of my clamp as mounted on a support;

Fig. 4 is a similar view showing the supported element in place and showing the action of the locking forces involved in case a force is exerted on the element to pull it out of the clamp; and

Fig. 5 is a similar view showing how the element may easily be released by pressing upwardly and rearwardly on a tab on the upper jaw and pulling outwardly on the element.

My spring clamp preferably comprises resilient strip metal parts or small plates 2 and '4 securely fastened together as by spot-welding 5 to form a unitary flat base portion which is also preferably provided with a hole 6 so as to be fastened to the support as by screw 8. Each clamp includes flat substantially parallel middle portions 10 and 12 which extend in angular relation to the base portion. The bent end portions of the clamp are provided by complementary S-shaped sections 14 and 16 which are located in relatively overlying and underlying spaced relation between the middle portions 10 and 12, as shown in Fig. 1. The lower S-shaped bent portion 16 provides an outer pocket or jaw 18 whose concave inner surface grips or engages the element 20 to be supported. It also provides a knee 22 extending toward the upper jaw 19 formed by the S-shaped bent portion 14. Similarly, the upper jaw \19 of the clamp is provided by the concave inner surface of the overlying bent end portion 14. Portion 14 of the clamp includes an extending knee 24 adjacent knee 22 and a releasing end tab 26. The base portion of the clamp is preferably provided by connected resilient strips of different length arranged in overlapped relation. The curves and spacings of the bent atent O end portion.

., tions and is shorter than the lengthwise dimension of the end portions are not critical, however, since elements varying considerably in diameter may be effectively held by my clamp. The respective locking and gripping parts of the improved clamp are provided by a first part consisting of the middle portion 10 extending angularly from the base 2 and the S-shapecl bent end portion extending angularly from the middle portion having a concave inner gripping surface adjacent the middle portion and a convex inner locking surface that is spaced from the middle portion 10. The second locking and gripping part of theclamp includes a second middle. portion 12 extending angularly from the base 4 in spaced substantially parallel relation to, the middle portion 10'. This. part further includes any S-shaped bent end portion that extends angularly from the middle portion 12 having a convex outerv locking surface adjacent the middle portion 12 underlying the convex inner locking surface of the first bent end portion and a concave outer gripping surface spaced from the middle portion 12 underlying the concave inner gripping surface of the first S-shaped The locking and gripping action of the clamp is obtained by the cooperative arrangement of the spaced middle portions with the S-shaped end portions where particularly the underlying end portion substantially spans the space between the parallel middle pormiddle portion 12.

When my clamp is not in use, the two jaws 18 and 19 are spaced apart a lesser distance than the diameter of the smallest element to be supported, the two knees are almost, if not, touching, and the middle portions .10 and 12 are substantially parallel and perpendicular to the base portion. One of the jaws 18 of the improved clamp includes the concave outer surface of the bent end portion 16. The other of the jaws 19 includes the concave inner surface of the bent end portion 14. The end portion 14 of the clamp extends from the middle portion 10 across the spacing between the parallel middle portions 10 and 12 and beyond the middle portion 12.

To insert element 20 in the clamp, all that need be done is to push it between the two knees 22 and 24, as shown in Fig. 2. This forces knee 2 4 upwardly, flexing the middle portion 10 slightly to the left, and at the same time knee 22 is forced downwardly to the right until the element snaps into place between the jaws, as shown in Figs. 2 and 4.

When so secured, the clamped element cannot be released from the jaws by any direct pull or by vibration, since if any attempt is made to move the element out of the jaws (to the right in Fig. 2), it would only cause the jaws to grip it tighter. This is because when such a force F is exerted on the element the upper S-shaped bent portion 14 tends to be flexed in a direction of the arrow 28 about bend 29 in middle portion [10, thus tending to move the knee 24 downwardly about bend 29 as a pivot. At the same time, force F exerts a force in the direction of the arrow 30 upon the lower jaw 18, thus causing it to grip the element more tightly because the middle portion 12 is rotated slightly clockwise about bend 31, lifting the knee 22.

However, the element may be readily released with the fingers of one hand when desired. This is preferably accomplished by pressing the thumb upwardly and to the left against the releasing tab 26 (see arrow T) and at the same time pulling the element 20 to the right with the fingers (arrow F). As shown in Fig. 5, this readily releases the element since it flexes the middle portion 10 and the S-shaped bent portion 14 counterclockwise about bend 29, thus raising the knee 24 and pushing it to the left beyond the element 20. This action, plus the force F, tends to force the lower S-shaped bent portion 16 downwardly, bending the portion 12 somewhat clockwise about bend 31 so that the element readily passes between the separated two knees 22 and 24. The releasing tab 26 at the end of the overlying S-shaped bent end portion 14 extends beyond the middle portion 1270f the-clamp. 1

While I have-described my improved clamped for general use, it is especially adapted for clamping in place tubular fire detector elements on the bulkheads of aircraft and ships, used to provide automatic fire detection. My clamp is especially suitable for such uses since it will withstand high temperatures without impairment of its gripping properties, will not chafe the element, and furnishes a positivelock for such element which never can release, except by the manual releasing action de scribed.

While I have described my invention in its preferred embodiments, it is to be understood that the words which I have used are words of description rather than of limitation and that changes within the purview of the appended claims may be made without departing from the true scope and spirit of my invention in its broade aspects.

What is claimed is:

1. A self locking clamp of resilient strip material having a fiat base, a first locking and gripping part having a middle portion extending angularly from the base and an S-shaped bent end portion extending angularly from the middle portion having a concave inner gripping surface adjacent the middle portion and a convex inner lock-ing surface spaced from the middle portion, a second locking and gripping part having a middle portion 4 extending angularly from the base in spaced substantially parallel relation to the first middle portion and an S-shaped bent end portion extending angularly from the second middle portion having a convex outer locking surface adjacent the second middle portion underlying the convex inner locking surface of the first S-shaped end portion and a concave outer gripping surface spaced from the second middle portion underlying the concave inner gripping surface of the first S-shaped end portion, the second S-shaped end portion substantially spanning the space between the parallel middle portions and being shorter than the lengthwise dimension of the second middle portion.

2. A clamp of the character claimed in claim 1, in which the end of the first S-shaped bent end portion extends beyond the second of the middle portions.

References Cited in the file of this patent UNITED STATES PATENTS 320,260 Knuth June 16, 1885 361,153 Finks a Apr. 12, 1887 679,542 Peats July 30, 1901 713,888 Kellner Nov. '18, 1902 886,608 Jersemann May 5, 1908 1,205,889 Halvorson Nov. 21, 1916 2,108,347 Quarnstrom Feb. 15,1938 2,644,216 Aleshin July 7, 1953 FOREIGN PATENTS 408,301 Great Britain a Apr. 9, 1934

US669351A 1957-07-01 1957-07-01 Self-locking detachable clamp Expired - Lifetime US2948940A (en)

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US669351A US2948940A (en) 1957-07-01 1957-07-01 Self-locking detachable clamp

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US669351A US2948940A (en) 1957-07-01 1957-07-01 Self-locking detachable clamp

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3042353A (en) * 1960-11-08 1962-07-03 Anaconda Wrie & Cable Company Cable clamp
US3164433A (en) * 1962-03-12 1965-01-05 Gen Motors Corp Wiring connector
US3186554A (en) * 1962-11-23 1965-06-01 Birtcher Corp Retainer for printed circuit boards
US3262662A (en) * 1963-12-09 1966-07-26 Raymond A Cable fastener
US3276801A (en) * 1966-10-04 Spring support structures and related hardware for furniture
US4195807A (en) * 1977-07-04 1980-04-01 Itw Espana, S.A. Retaining clip for elongated members
US4285306A (en) * 1979-12-14 1981-08-25 Ford Motor Company Distributor engine mounting mechanism
JPS5884472U (en) * 1981-12-02 1983-06-08
US4440374A (en) * 1981-04-21 1984-04-03 Illinois Tool Works Inc. Integrally formed resilient clip and extension
US5535970A (en) * 1993-10-20 1996-07-16 Gobbi; Gianfranco Universal clamp for supporting the wall mounted piping of external electrical, telephone or plumbing systems
US5795784A (en) * 1996-09-19 1998-08-18 Abbott Laboratories Method of performing a process for determining an item of interest in a sample
US5856194A (en) * 1996-09-19 1999-01-05 Abbott Laboratories Method for determination of item of interest in a sample
US5878988A (en) * 1997-06-24 1999-03-09 Rakower; Joel A. Mounting bracket and method
WO1999013255A1 (en) * 1997-09-06 1999-03-18 Robert Bosch Gmbh Cable holder
USD486791S1 (en) 2003-01-29 2004-02-17 Senior Industries, Inc. Ground block
USD487427S1 (en) 2003-01-29 2004-03-09 Senior Industries, Inc. Ground block
US20040094682A1 (en) * 2001-01-22 2004-05-20 Waterman Marco Constantino Device for suspending objects
US6877996B1 (en) 2002-11-27 2005-04-12 Senior Industries, Inc. Grounding connector
US20060255568A1 (en) * 2005-04-22 2006-11-16 Otto Demel Fastening device for the installation and retention of an airbag at vehicle body
US20080128553A1 (en) * 2006-11-30 2008-06-05 The Boeing Company Apparatuses and methods for joining composite members and other structural members in aircraft wing boxes and other structures
US20090145047A1 (en) * 2007-10-15 2009-06-11 Hurricanefabric.Com, Llc Weather protection system
US20140338951A1 (en) * 2013-05-15 2014-11-20 Hitachi Metals, Ltd. Termination structure, termination method and termination terminal for high-speed transmission line
US20150274008A1 (en) * 2014-03-27 2015-10-01 Toyoda Gosei Co., Ltd. Fuel feeding device for vehicles
US20180064264A1 (en) * 2013-07-16 2018-03-08 Fasteners For Retail, Inc. Lock for securing front rail to wire shelving
US10132428B1 (en) * 2017-07-19 2018-11-20 Facebook, Inc. Cable management clip

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US320260A (en) * 1885-06-16 Thomas h
US361153A (en) * 1887-04-12 Albeeto finks
US679542A (en) * 1901-04-22 1901-07-30 Alfred H Peats Clasp.
US713888A (en) * 1902-04-09 1902-11-18 Charles Kellner Spring-clasp.
US886608A (en) * 1908-02-07 1908-05-05 Max Jersemann Display-holder for jewelry and the like.
US1205889A (en) * 1915-09-08 1916-11-21 Julius Halvorson Clothes-pin.
GB408301A (en) * 1932-09-07 1934-04-09 George Pollard Dennis Improvements in or relating to electric contacts
US2108347A (en) * 1936-12-07 1938-02-15 Bert L Quarnstrom Tubing clip
US2644216A (en) * 1950-06-17 1953-07-07 William N Aleshin Fixed resilient clip to hold articles

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US320260A (en) * 1885-06-16 Thomas h
US361153A (en) * 1887-04-12 Albeeto finks
US679542A (en) * 1901-04-22 1901-07-30 Alfred H Peats Clasp.
US713888A (en) * 1902-04-09 1902-11-18 Charles Kellner Spring-clasp.
US886608A (en) * 1908-02-07 1908-05-05 Max Jersemann Display-holder for jewelry and the like.
US1205889A (en) * 1915-09-08 1916-11-21 Julius Halvorson Clothes-pin.
GB408301A (en) * 1932-09-07 1934-04-09 George Pollard Dennis Improvements in or relating to electric contacts
US2108347A (en) * 1936-12-07 1938-02-15 Bert L Quarnstrom Tubing clip
US2644216A (en) * 1950-06-17 1953-07-07 William N Aleshin Fixed resilient clip to hold articles

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276801A (en) * 1966-10-04 Spring support structures and related hardware for furniture
US3042353A (en) * 1960-11-08 1962-07-03 Anaconda Wrie & Cable Company Cable clamp
US3164433A (en) * 1962-03-12 1965-01-05 Gen Motors Corp Wiring connector
US3186554A (en) * 1962-11-23 1965-06-01 Birtcher Corp Retainer for printed circuit boards
US3262662A (en) * 1963-12-09 1966-07-26 Raymond A Cable fastener
US4195807A (en) * 1977-07-04 1980-04-01 Itw Espana, S.A. Retaining clip for elongated members
US4285306A (en) * 1979-12-14 1981-08-25 Ford Motor Company Distributor engine mounting mechanism
US4440374A (en) * 1981-04-21 1984-04-03 Illinois Tool Works Inc. Integrally formed resilient clip and extension
JPS5884472U (en) * 1981-12-02 1983-06-08
US5535970A (en) * 1993-10-20 1996-07-16 Gobbi; Gianfranco Universal clamp for supporting the wall mounted piping of external electrical, telephone or plumbing systems
US5795784A (en) * 1996-09-19 1998-08-18 Abbott Laboratories Method of performing a process for determining an item of interest in a sample
US5856194A (en) * 1996-09-19 1999-01-05 Abbott Laboratories Method for determination of item of interest in a sample
US6562298B1 (en) 1996-09-19 2003-05-13 Abbott Laboratories Structure for determination of item of interest in a sample
US5878988A (en) * 1997-06-24 1999-03-09 Rakower; Joel A. Mounting bracket and method
WO1999013255A1 (en) * 1997-09-06 1999-03-18 Robert Bosch Gmbh Cable holder
US20040094682A1 (en) * 2001-01-22 2004-05-20 Waterman Marco Constantino Device for suspending objects
US6877996B1 (en) 2002-11-27 2005-04-12 Senior Industries, Inc. Grounding connector
USD486791S1 (en) 2003-01-29 2004-02-17 Senior Industries, Inc. Ground block
USD487427S1 (en) 2003-01-29 2004-03-09 Senior Industries, Inc. Ground block
US20060255568A1 (en) * 2005-04-22 2006-11-16 Otto Demel Fastening device for the installation and retention of an airbag at vehicle body
US7575194B2 (en) * 2006-11-30 2009-08-18 The Boeing Company Apparatuses and methods for joining composite members and other structural members in aircraft wing boxes and other structures
US20080128553A1 (en) * 2006-11-30 2008-06-05 The Boeing Company Apparatuses and methods for joining composite members and other structural members in aircraft wing boxes and other structures
US20100032524A1 (en) * 2006-11-30 2010-02-11 The Boeing Company Apparatuses and methods for joining composite members and other structural members in aircraft wing boxes and other structures
US8104714B2 (en) 2006-11-30 2012-01-31 The Boeing Company Apparatuses and methods for joining composite members and other structural members in aircraft wing boxes and other structures
US20090145047A1 (en) * 2007-10-15 2009-06-11 Hurricanefabric.Com, Llc Weather protection system
US8833034B2 (en) * 2007-10-15 2014-09-16 Hurricane Fabric, Llc Clip for weather protection system
US20120273641A1 (en) * 2007-10-15 2012-11-01 Hurricane Fabric, Llc Weather protection system
US8215072B2 (en) * 2007-10-15 2012-07-10 Hurricane Fabric, Llc Weather protection system
US20140338951A1 (en) * 2013-05-15 2014-11-20 Hitachi Metals, Ltd. Termination structure, termination method and termination terminal for high-speed transmission line
US9362632B2 (en) * 2013-05-15 2016-06-07 Hitachi Metals, Ltd. Termination structure, termination method and termination terminal for high-speed transmission line
US20180064264A1 (en) * 2013-07-16 2018-03-08 Fasteners For Retail, Inc. Lock for securing front rail to wire shelving
US10517410B2 (en) * 2013-07-16 2019-12-31 Fasteners For Retail, Inc. Lock for securing front rail to wire shelving
US20150274008A1 (en) * 2014-03-27 2015-10-01 Toyoda Gosei Co., Ltd. Fuel feeding device for vehicles
US9718349B2 (en) * 2014-03-27 2017-08-01 Toyoda Gosei Co., Ltd. Fuel feeding device for vehicles
US10132428B1 (en) * 2017-07-19 2018-11-20 Facebook, Inc. Cable management clip

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