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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.
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