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Патент USA US3097830

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July 16, 1963
A. B. CASTLE
' 3,097,820
INSTRUMENT CLAMPS
Filed Oct. 24, 1960
ALFRED B. CASTLE INVENTOR
BY
ATTORNEY
'— ?vir
United States Patent ‘50 "ice
3,097,820
Patented July 16, 1.963
1
.2
3,097,820
actuation of an operating element such as an operating
screw‘which actuates a toggle arrangement of links pro
Alfred B. Castle, Brookmont, Md.
ducing a change in dimension in the band resulting in
the clamping action.
Referring more particularly to the drawing and FIGS.
INSTRUMENT CLAMPS
(4104 Maryland Drive, Washington '16, D.C.)
"Filed Oct. 24, 1960, Ser. No.'64,3§2
9 Claims. (Cl. 248—27)
1 and ‘2 particularly, an instrument panel 10Ihas a circu
lar instrument receiving opening 11 and an attaching
screw ‘receiving opening (not shown) receiving an at
taehing screw 12 which is threaded in lug 13 secured to
clamping band 14. A headed operating screw 15 passes
tfreely through ‘an aperture 16 in panel 10 and through
The‘present invention relates to clamping structure
and more particularly to peripherally gripping clamping
structure ‘for securing an instrument on .a panel so that
suchinstrument may be-eas'ily applied to and removed
?rom itssupporting panel-and the angular position of
the instruments may be easily adjusted so indicator hands
of several instrumentsmay be arranged in a predeter
elongated slots in lugs 17 and 18 mounted on one end
portion 19 of the overlapping end portions ofthe clamp
ing‘band 14 to hold theoperating screw in ‘position.
mined patternallowingan observer such as a pilot to 15 The end portion 19 is provided with a tongue receiving
transversely extending slot 20 receiving tongue 21 of the
other overlapping end portion of the clamping band,
which tongue is relatively slidable through slot 20, the
tongue and slot maintaining the band in circular form».
readily determine operating conditions without requiring
separatelreading. of each instrument. This application is
a.:continuation-in-part of application S.N. 573,164, ?led
March 22, ‘1956, now Patent No. 2,957,666‘.
. Hcretoforeinstruments have been supported in instru 20
ment panels by various means and some of these means
A circumferential slot 22 is provided in the one end
portion 19 anda circumferential slot 23 is provided in
end portion provided with tongue 21. The voperating
screw 15 passing through aperture 16 and slots in lugs
have provided for rotatable adjustment, but some have
notzbeenentirely satisfactory on the basis of cost, adapt
Hand ‘18 is threaded through a nut 24 and an abutting
ability to limited mounting space and security of main
taining the instruments in position while being subject to 25 central eye 25 of the link means formed of a resilient
element. Strut link sections 26 and 27 extending from
vibration, accelerating forces, shocks and the like.
eye 125 terminate in hooks 28 and 29‘ respectively which
vAn: object of the present. invention is to overcome some
pass'through slots 23 and 22 and are pivotally engaged
of these problems of the prior art devices, to provide a
in apertures in tongue 21 and end portion 1.9t respec
light weightclamp occupying a minimum of panel space
and operable ‘from the ‘front of the instrument panel, 30 tively whereby when the screw 15 is rotated the motion
ofrnut 24 thereon causes the eye 25 of the resilient ele
andwsecured in position by conventional fastening means.
ment to move straightening the toggle linkage closing
Another object is to provide a linear motion produc
the clamping'band‘ 14 securing an instrument in adjusted
ingtde‘vice‘in which the mechanical advantage varies.
position. The nut is positively connected tothe eye 25
Adurther :object is toprovide clamp means of gen
eral utilityand of varying mechanical advantage and 35 to prevent relative motion.
operating speeds {for clamping objects and involving struc
' v‘In the modi?cation of FIGS. 3 and 4 the instrument
ture occupying. a minimum of space.
pane1 11) having the instrument receiving opening 11 has
a clamping band 31 abutting the panel with the end por
tions36 and 35 being adjacent and having tongues 32
40 land ‘33 respectively overlapping the end portions 35 and
ing drawing wherein:
36 respectively. An operating-screw 37 extending through
FIG. v1 .isxa-top view of an instrument receiving band
‘Other andfurther objects'will be apparent :as the de
scription proceeds and .upon reference to the accompany
in. open position mounted'on a panel showing the re
silientselement forming a toggle linkage of increasing
aperture 16 in panel 10 is threaded in a nut 38 which en
gages :and abuts aneye 54 cent-rally of a resilient link‘
element having link sections 55 and 56 having hooks 57
mechanical advantage operated by a screw to clamp ‘an
instrument and to secure ‘the clamp on the panel and 45 and'58 engaging pivot apertures in dimples in end sec
tions '36 and 35 respectively whereby tightening action
showing an :attachinglug on the opposite side of the
clamping band.
of the screw causes the end sections to move toward each
'FIG. 2 is a'transverse section taken on broken line
2-2 ofrFlG. 1.
other with a reducing mechanical advantage and causing
the head of the screw to'engage the panel holding the
FIG. 3 is a plan view ofanother form of clamp in
substantially closed condition having a ldecreasingme
ohanical advantage resilient linkage.
50 clamping band securely against the panel, it being ap
parent that an attaching lug such as 13‘ shown in FIG. 2
is provided for they other side of the clamping band. The
overlapping tongues provide ior engagement with the
connection of the ends of the resilient element to the 55 screw .15 preventing objectionable engagement with an
instrument during the tightening action.
clamping band.
FIG. 4 is a section taken on line ‘4-4 illustrating the
"FIG. v5 vis a plan view of "another 'form ‘of resilient
. In the modi?cation'of FIGS. 5 ‘and 61a clamping band
toggle linkage of increasing-mechanical advantage on- a
65-.havingendportions ‘66 and 67 is secured in position
clamping-band without overlapping ends.
at the otherside with an attaching lug and screw similar
to lug 13 and screw ‘12 described .above and the end por
‘FIG. 6 isia section- taken on broken‘ line 6--6“ of FIG.
5 showing therguides ‘for the toggle linkage element.
FIG. 7. is a plan view. of another‘iorm of toggle link
age inoluding. separate‘link elements providing increasing
mechanical advantage upon tightening of the clamp with
tions '6i6iand 67 are:drawn together by a headed operat
ing screw 168 threaded into a nut ‘60 engaging an- eye
70 centrally of a resilient link-age element.h-aving an
gularly disposed interconnected'liiikxsections 71 and .72
with the outer endof link section 72 having a book 73
arclampiband'liaving overlapping end portions. ‘
65 in. annaperture in a dimple in end. section 67 vwhile the
f-FIG. i8 is a section ‘taken; on broken line =8~8of
interconnection between link sections 71 and ‘72 is slid
iably received in a‘ slot in guide lug 74 secured to end por
lion .616 of the‘ band. Interconnected link sections "715 and
tion includes a band for» engaging an instrument or other
object to be-gripped and means to distort the‘band pro 70 76 extending ‘oppositely to link sections 71 and 72 have
the interconnection received and guided in a slot of ing
ducing a ‘changerin contour whereby the‘object will be
77 on‘end section 67'with a hook 78 pivotally received
securely‘ gripped. ‘The distortion may'be‘obtaine‘d by
FIG.17.
Brie?y the‘clamping structure of the present inven
3,097,820
in an aperture in a dimple on end portion 66. It will
be apparent that upon rotation of the screw 68 in a
tightening direction ‘the nut 69 will be drawn toward the
panel 10 causing the link sections to draw the end por
4
each link pivotally connected to the cooperating end por~
tion of the band and passing through the circumferen
tially extending slo-t whereby rotation of said screw will
cause a change of the angular relation of said link means
tions 66 and 67 together thereby clamping an instrument 5 and move said end portions relative to each other.
with an increasing mechanical advantage and also se
2. The invention according to claim 1 in which the
curing the clamp to the instrument panel. It will be ap
link means is a continuous resilient element providing
parent that the nut is prevented ‘from rotation relative to
for the angular change by de?ection of the material of
eye 70 and the linkage. It will also be evident that the
said element.
screw could be ?xed to eye 70 and the nut applied on
3. The invention according to claim 1 in which the
the exposed surface of the instrument panel. Overlap
link means includes two separate links pivotally con
ping lugs 79 and ‘80 secured to end portions 66 and 67
respectively prevent screw 68 from moving outwardly.
nected to said nut and to said end portions.
4. An instrument clamp arrangement comprising a
‘In FIGS. 7 and 8 a modi?ed clamp includes a band
mounting panel having an instrument receiving opening,
39 having its ends 40 and 41 in overlapping relation, a
T-shaped opening or slot 42 being provided in end 40‘ and
an opening or slot 43 being provided in end 41, the end
a clamping band registering with said opening and hav
ing its ends spaced apart, an operating screw extending
through an aperture in said panel generally parallel to
the axis of said band and radially outward of said band
41 passing through the T-shaped slot thereby prevent~
ing outward separation of the end 41 that would other
adjacent said ends, a nut on said screw adjacent said
wise overlie the end 40. Studs or rivets 44, 45 are se 20 band, a continuous resilient element having its ends con
cured to the ends 40 and 41 of the band and one end
nected to the ends of the band and an intermediate por
of a ?rst strut link 46 is pivoted to stud 44 and one end
tion connected :to said nut whereby when said screw is
of a second strut link 47 is pivoted to stud 45, the other
rotated said nut and intermediate portion of said re
ends of links ‘46 and 47 being pivotally connected to
silient element will be positively de?ected and cause the
gether and to a pivot member 48 having a threaded aper 25 ends of said resilient element and band to move toward
ture through which an operating screw 49 is threaded,
each other and cause said clamping band to close and
the head of the operating screw engaging the instrument
thereby retain an instrument on said panel.
panel taking the reaction of tightening the screw in the
5. The structure as set forth in claim 4 in which the
pivot member 48. This operation of the screw draws
said resilient element includes at least two angularly ar
the pivot member 48 and the links from the full line or 30 ranged sections between the connection to the band and
open position of the clamp to the dotted line or clamp
the connection to said nut, means to con?ne said angu
ing position of the clamp ‘thereby producing a peripheral
clamping action and after the instrument is clamped
further tightening secures the clamp on the instrument
panel 10.
For preventing radially outward movement of the
screw 49 and pivot member 48, slotted guiding lugs 50
and 51 may be provided on band end 40, the slots being
of su?‘icient length to permit necessary relative move
larly arranged sections in operative relation to said band
whereby when said screw is rotated said band end por
tions will be drawn toward each other with increasing
mechanical advantage.
6. The structure according to claim 4 in which said
resilient element includes a single straight section be
tween each end connected to said band and the inter
mediate portion connected to the nut whereby when the
ment between the screw and the lugs to allow un 40 screw is operated the ends of the band are drawn to
obstructed tightening action within the range of the links.
To assure aligning the pivot member 48 for insertion of
the screw into the threaded aperture thereof the lug 51
gether with a reducing mechanical advantage.
7. The invention according to claim 6 in which guide
lugs having screw receiving openings are provided on said
may engage one ?at surface of the pivot member 48 and
to prevent excessive movement of the pivot member to
ward the lug 50 the lug 50 may be of su?icient extent
axially of the tube formed by the band 39 that the links
cannot move beyond approximately the dotted line posi
tion of the links. The guiding lugs may be separate ele
ments secured to the band 39 or may be formed by bend 50
band for preventing the ends of the ‘links connected to
said pivot member from becoming ine?ective and main
taining the links in operative postion whereby the ends
of the band are positively moved by a toggle action as
said screw is operated, and a shouldered screw acting on
said clamp to maintain a ?xed adjustment and to secure
the band to a support.
ing material of the band 39 to provide such lugs, the lug
8. The combination with an instrument panel having
50 taking any excess force so that the clamping pressure
an instrument opening therethrough and diametrically
disposed screw receiving apertures in said panel just
outside of said instrument receiving opening, an instru
ment clamping band having its ends overlapping adapted
cannot damage the instrument and to prevent the toggle
from breaking in the other direction. To attach the
other side of the clamp a threaded lug 52 which may be
similar to lug 13 is provided and the clamp is thereby se
cured to ‘the instrument panel ‘10 and the instrument 14
to have one edge lie against one surface of said panel
just outside the periphery of said instrument receiving
can be adjusted as desired.
opening, anchor lug means in alignment with one of
In the modi?cation of FIGS. 1 and 2 and 7 and 8 it
said apertures and secured to said band intermediate the
will be noted that the end portions are provided with a 60 ends thereof, and an anchoring headed screw passing
slight offset to accommodate a circular instrument with
through said one aperture and threaded into said anchor
out excessive distortion.
ing lug whereby said anchoring screw will secure the in
'It will be apparent that changes can be made within
termediate portion‘ of said band to said panel, an operat
the valid scope of the claims.
ing headed screw passing through the other aperture, a
What is claimed is:
65 cooperating nut on said operating screw, a pair of struts,
1. A clamp comprising a band having its end portions
one end of each strut being pivotally connected to an
in overlapping relation, one of said end portions being
provided with a slot receiving the other end portion, each
radially outwardly overlapping end portion being pro
overlapping end portion of said band, the other end of
each strut being connected to said nut so that with the
band in expanded condition the struts are at a sharp
vided with a circumterentially extending slot, an operat 70 angle‘diverging toward the head of said operating screw
ing screw positioned outwardly of said band, means on
whereby rotation of said operating headed screw in a
said end portions con?ning said screw in a position axial
direction to draw said nut toward the head of said oper
ly parallel to the axis of said band, nut means on said
ating screw will cause the head thereof to ?rmly engage
screw, an interconnected pair of links having one end of
the other surface of said panel and will draw said nut
each link connected to said nut, and the other end of 75 toward said panel and cause said struts to approach a
3,097,820
6
straight line relationship ‘and draw said band together
strip material and generally parallel to the plane of said
with su?‘icient force ‘to clamp an instrument and cause
extensions and said struts, means to retain the screw
said band and the instrument supported thereby to be
securely connected to said panel.
9. A clamping structure for producing displacement
means in operative position whereby operation of said
comprising strip material having a pair of end portions
screw means will cause the ‘angularity between said struts
to vary causing positive longitudinal displacement of the
end portions of said strip material.
and a pair of extensions, each extension connected by
One of its ends to one of the end portions, each- exten
sion overlapping the other extension and the other end
portion, 'a strut extending from the free end of each of 10
said extensions, guide means on said end portions of said
strip material adjacent the free ends of said extensions,
each strut movably connected by one of its ends to the
free end of its cooperating extension and extending to
ward the other end of the other strut, means intercon 15
necting the said other ends of said struts, screw means
extending transversely from said means interconnecting
said other ends of said struts and transversely of said
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,342,626
1,694,664
2,373,833
2,598,704
2,684,221
Frank _______________ __ June 8,
Parker ______________ __ Dec. 11,
Johnson _____________ __ Apr. 17,
Lai _________________ __ June 3,
Wollam _____________ __ July 20,
1920
1928
1945
1952
1954
1,138,351
France ______________ __ Jan. 28, 1957
FOREIGN PATENTS
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