1 15,1946. S.J.CHRIS I 2,409,253‘ CLAMPING STRUCTURE Filed Feb. 28, 1944 INVENTOR. S TEPHE/V ¢/. CHE/6 BY / ’ ATTQHNEY 2,409,253 Patented Oct. 15, 1946 UNITED STATES PATENT OFFICE, 2,409,253 CLAMPING STRUCTURE Stephen J. Chris, Paci?c Palisades, Calif., assign or to Douglas Aircraft Company, Inc., Santa Monica, Calif. Application February 28, 1944, Serial No. 524,325 3 Claims. (01. 248—316) - .1 2 and having a thumb piece 26 and a catch portion 28 adapted to engage over the rolled back end 24 of the other end of the strap. In the form of the invention illustrated in the that the part secured by the device is ?rmly held, drawing, the strap is formed with a, bent portion notwithstanding minor variations in the size of 30 at each side of the offset portion IS. The the part or the subjection of vthe part to severe bent portion is preferably formed so as to be clear vibration. of the surface on which the holding device is The invention is particularly designed to be in supported so as to be free to yield without con corporated in a readily detachable clamp so straint. .10 formed as to exert a ?rm grip on the part held As shown in the drawing the contour of the without the use of springs or other additional bent portion 30 is generally of S shape. The parts. closing of the toggle catch member will exert a An object of the invention is to provide a one pull on the strap which will effect a slight piece clamp element so formed as to provide a desired degree of resiliency by the special con 15 straightening of the S bend. The grip of the holding device is therefore secure although the ?guratiOn of the element. device possesses sufficient resiliency to accommo A further object'of the invention is to provide date itself to minor differences in size of the a resilient clamping element which is inexpensive part held or of the various portions of which to manufacture yet efficient and durable in the holding device is composed. 20 service. As shown in detail in Figure 3 the bent por Further objects and features of the invention tion 30 of the strap or band comprises a plu may hereinafter appear in the following descrip rality of curved portions the general purpose of tion and accompanying drawing in which a. pre which is to enable the holding device to accom ferred form of the invention is shown by way of illustrative example only. It is to be under 25 modate‘ ‘itself to articles of somewhat varying sizes engaged in a bracket cooperating with the ’stood that the scope of the invention is not lim holding device while enabling the relation of the ited by this illustrative showing but only as de bracket and article to remain unchanged, thus ?ned by the appended claims. avoiding the imposition of stresses on the bracket. In the drawing, in which identical numerals The straight portion I‘! of the U-shaped se 30 indicate identical parts in different views, curing portion I6 is connected to the side por Figure 1 is a perspective view showing the tions by a curved section 32 merging through a clamp in use. _ reverse curve 34 with the peripheral contour of Figure 2 is a plan view of the clamp. the device, as seen in plan. The curve 34 merges Figure 3 is a, fragmentary plan view of the 35 with an outwardly bowed curve 36, which is in clamp to an enlarged scale. tended to afford a desired degree of yield under Referring now to the drawing, the invention is the hoop tension in the band I4 set up by the shown as a quick detachable clamp for a jar H1 lever clamp securing the ends of the band l4 containing liquid. The jar is shown as screwed together around the article held. The curve 36 into a combined closure and bracket I2 prefer ably made of plastic or other relatively frangible 40 is preferably connected by a further curve 38 with the flat portion of band M. The provision material which is screwed to a Wall or partition of a continuous series of curves ensures that con in an airplane. The jar is held securely clamped centration of stresses is avoided. The curved against the wall by a strap M of Spring steel to portion 32 facilitates the opening apart or clos prevent vibration loosening the jar in the bracket, ing together of the sides of the U-shaped member or possibly causing fracture of the bracket. The 45 and thus enables the holding device in closed strap I4 is formed to provide an offset attaching position to assume a larger or smaller diameter portion iii of generally U shape secured to the while leaving the center point of the space en partition by screws l8, the strap l4 being fur closed unmoved and therefore the relation of the nished at its free ends with a readily releasable bracket l2 and holding device remains undis 50 toggle and lever catch acting to both impart turbed. hoop tension to the strap [4 and to secure the A covering of rubber or plastic is preferably free ends of the band together. This catch may applied to the strap [4 as indicated at Ma to be of usual form comprising a swinging toggle avoid possible marring of the surface of the part link 22 pivotally connected to one end of the strap 14, a lever being pivotally mounted on the link 65 held in the clamp. This invention relates to holding or clamping means and has for its object to provide such de vices with a degree of resilience that will ensure 2,409,253 It will be obvious that the bent portion 30 may be given con?guration of various forms. For instance, the bent portion might be formed as a corrugated length of the strip. Articles of other than cylindrical form can be held by providing a resilient portion at spaced points in the length of strip in order to ensure resiliency. Additional adjustability can -be ob tained by forming the strap in two portions over 4 2. A securing device, comprising: a ?exible . band of inextensible material bent to a substan tially hooped shape; means carried by the oppo site ends of said band cooperating with each other for drawing and securing the same together to impart a hoop compression to an article cir cumscribed by the band, the medial portion of - the band being formed with an outwardly extend ing substantially U-shaped portion, the bow of lapping at the offset portion 16, holes for screws 10 which is relatively ?at and adapted to be clamped being provided in each portion so that the off in facewise engagement with a substantially ?at sets can be overlapped to different amounts. supporting surface, the portions of the band on Any suitable clamping device can be used for opposite sides of said U-shaped portion being securing the ends of the strap around the article provided with sigmoidal deformations, the band to be held provided the device exerts a pull on the 15 between said sigmoidal deformations and the strap or band from which the clamp is made. ends thereof being smoothly curved and free of The device is one of wide applicability for use any transverse deformation, the material of said where articles are required to be securely but band being su?'iciently ?exible to permit said sig releasably held, particularly where vibration or moidal deformations to be elongated when the jarring is to be expected as in airplanes or rail 20 ends of the band are drawn together whereby said way trains. An example of such articles are device can be used to circumscribe and securely hand ?re extinguishers and thermos jugs. It is clamp articles of varying diameters. therefore to be understood that the clamp of this 3. A securing device, comprising: a ?exible invention may be modi?ed in various ways by band of inextensible material bent substantially those skilled in the art without departing from 25 to a hoop shape; means carried by the opposite the scope of the invention as de?ned by the ends of said band cooperative with each other for appended claims. drawing and securing the same together to im I claim: part a hoop compression to an article circum 1. A securing device, comprising: a ?exible scribed by the band, the medial portion of the band of inextensible material bent substantially 30 band being formed with a plurality of oppositely to a hoop shape; means carried by the opposite directed U-shaped portions, the bow of at least ends of said band cooperative with each other one of said portions being substantially ?at and for drawing and securing the same together to adapted to be clamped in facewise engagement impart a hoop compression to anarticle circum against a ?at supporting surface, the band be scribed by the band, the medial portion of the 35 tween said U-shaped portions and the ends band being formed with a plurality of oppositely thereof being smoothly curved and free of any directed U-shaped portions, the bow of at least transverse deformation, the material of said one of said portions being substantially flat and band being su?iciently ?exible to permit said U adapted to be clamped in facewise engagement shaped portions to be elongated when the ends against a ?at supporting surface, the band be 40 of the bands are drawn together whereby the tween said U-shaped portions and the ends there eifective diameter of said device can be increased of being smoothly curved and free of any trans so that articles of varying diameters can be cir verse deformation, the material of said band be cumscribed and securely clamped by the device; ing su?iciently ?exible to permit said U-shaped and a sheath of resilient material covering the portions to be elongated when the ends of the smoothly curved opposite end portions of said bands are drawn together whereby the eifective band. diameter of said device ‘can be increased so that' articles of varying diameters can be circum scribed and securely clamped by the device. STEPHEN J. CHRIS.