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Патент USA US2122868

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July 5, 1938.
2,122,868
E. B. MORGAN
CLAMP
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Filed Juné 1, 1957
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2,122,868
Patented July 5, 1938
UNITED ‘STATES
PATENT OFFICE
2,122,868
CLAMP
Erving B. Morgan, Grand Rapids, Mich, assignor
to American Seating Company, Grand Rapids,
Mich., a corporation of New Jersey
Application June 1, 1937, Serial No. 145,686
2 Claims. (Cl. 287-58)
A bifurcated clamp, generally designated I6,
The present invention relates to clamps and
more particularly to clamps for maintaining a embraces the tubular pedestal I2, its opposite legs
I‘I, I8 each being respectively provided with a pair
pair of telescopically slidable members in longi
tudinally adjusted position. The clamp of the of spaced laterally disposed inwardly turned ears
I3, 20. The ears I9 which project laterally and
instant invention is in the nature of an improve
ment or modi?cation of the clamp shown in
United States Letters Patent No. 2,039,973, issued
May 5, 1936, on application ?led by me December
22, 1933, Serial No. 703,634.
lo
The primary objects of. the instant invention
are to provide a clamp assembly of the general
character above indicated which is particularly
well adapted for use in maintaining a seat dis
posed forwardly of a school desk at a predeter
mined or adjusted height from the ?oor and/or
in properly adjusted vertical relation to the desk;
and, to provide such a clamp assembly which is
convenient and efficient in service, which is
readily adjustable in use, and which is economical
in manufacture.
An illustrative embodiment of the invention
is shown in the accompanying drawing, where
m:
Figure 1 is a front elevational view of a base
support for a vertically disposed tubular pedestal
within which a chair or table top supporting
column is longitudinally slidable and vertically
adjustably maintained;
’
Figure 2 is an enlarged sectional view thereof
30 on line 2—2 of Figure 1;
Figure 3 is a sectional View on line 3-3 of.
Figure 2;
Figure 4 is a view of the base supported tubular
pedestal, its telescopically slidable chair or table
top supporting column and the clamp for main
taining the pedestal and column in longitudinally
vertically adjusted position; and
Figure 5 is a perspective View of the clamp with
out its tightening bolt.
Referring then to the drawing wherein like
1i)
parts of the structure shown are designated by
the samenumerals in the several Views, a base
support I!) of cast or stamped sheet metal and
having oppositely disposed depending feet II, is
provided with a vertically disposed tubular
pedestal I2 secured thereto in any convenient
conventional manner.
A supporting column I3 for supporting a chair
or table top and here shown as of tubular metal
stock is telescopically slidable within the tubular
pedestal I2. The tubular pedestal is provided
with a pair of spaced parallel slots I5, I6 trans
versely of its length, the slot I5 being in the form
of. a recess adjacent the upper end of the tubular
55
pedestal I2.
inwardly toward each other are seated within the
upper slot or recess I5 and bear against the outer
wall of the chair or table top supporting column
I3 whereas the ears 20 are seated within the lower
slot I6 and engage the outer wall of the sup 10
porting column I3.
v
Means for compressing the legs I'I, I8 of the
clamp I6 toward each other for maintaining
pedestal I2 and its telescoping column I3 in
longitudinally vertically adjusted position com 15
prises the threaded bolt 2I projected through
the bolt receiving aperture 22 in the leg ll of the
clamp and its internally screw threaded sleeve
nut 23 projected through the receiving aperture
20
24 of the leg I8 of the clamp.
Tightening the sleeve nut 23 on its threaded
bolt 2I causes the legs I'I; I8 of the clamp I6 to
be drawn toward each other which in turn causes
the pair of ears I9, 20 to more tightly engage the
outer wall of. the column I3 whose opposite outer
surface is thus caused to tensionally and friction
ally engage the inner surface of the tubular
pedestal I3.
It will thus be seen that the clamp assembly
herein shown and described is particularly well
adapted for use in maintaining a seat disposed
forwardly of a school desk at a predetermined or
adjusted height from the ?oor and/ or in properly
adjusted vertical relation to the desk. This
clamp assembly is convenient and ef?cient- in
service, is readily adjustable in use and is ‘eco
nomical in manufacture and while but one speci?c
embodiment of the invention has been herein
shown and described, it will be understood that
certain details of the construction shown may be
altered or omitted without departing from the
spirit of the invention as the same is de?ned by
the following claims.
I claim:
1. In a device of the class described, a tubular 45
member provided with a pair of spaced parallel
slots disposed transversely of its length, a member
telescopingly disposed within said tubular mem
ber, a bifurcated clamp embracing the tubular
member and having one leg provided with spaced
laterally disposed ears each seated within a slot
and each adapted to engage the wall of said
second member, and means for compressing the
legs of the clamp toward each other for maintain
ing the wall of said member in frictional engage 56.
2,122,868
ment with the inner wall of said tubular member
to maintain said members in longitudinally ad
her and having one leg provided with spaced
laterally disposed ears respectively seated within
2. In a device of. the class described, a tubular
member provided with a recess disposed trans
said recess and within said slot adapted to engage
the wall of said second member, and means for
compressing the legs of the clamp toward each
justed position.
versely of its length adjacent one end thereof and
with a slot disposed through its wall in spaced
parallel relation to said recess, a member tele
other for maintaining the wall of said member in
frictional engagement with the inner wall of said
tubular member to maintain said members in
scopingly disposed within said tubular member,
longitudinally adjusted position.
10 a bifurcated clamp embracing the tubular mem
ERVING B. MORGAN.
10
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