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Патент USA US3042961

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July 10, 1962
R. F. TILGNER
3,042,951
HOLD-DOWN LUG TYPE BRUSH SECTION
Filed July 1, 1959
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Patented July it), 1362
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1
along the edges thereof. The lugs upon opposite sides
3,042,951
are opposed to provide coacting pairs and as many pairs
Ralph Id‘. Tilgner, Ellieott tCity, Mil, assignor to Pitts
burgh Plate Glass Company, Allegheny County, Pa,
uniformly spaced peripherally along the edges of the
HGLD-DQWN SLUG TYPE BRUSH SECTIIQN
a corporation of Pennsylvania
'
as may be required adequately to secure a brush strip are
band with the lugs on one side lying in a common plane.
A circularized brush strip 12 for the section comprises
Filed July 1, 1959, Ser. No. 824,332
13 Claims. (Cl. 15—182)
a channel backing 13 formed in the usual manner from
a tape or ribbon of sheet steel or other appropriate metal,
and having side walls which are disposed in approximately
This invention relates to brushes and it has particular
relation to the provision of simple and inexpensive units 10 parallel planes so that the walls project substantially
radially outwardly from the band it). The section formed
or sections that can be mounted singly or ganged‘in
by the turns of the brush strip is straddled by pairs of
multiple upon an appropriate arbor or shaft to provide
lugs 11. Within the channel is disposed the bight or
a rotary, power-driven brush. By use of the proper
median portion of ?ll material 14:. The latter may
number of sections, brushes of substantially any length
be of Tampico, nylon ?bers, cellulose acetate ?bers, steel
can be obtained. It will be manifest to those skilled
in the art that the sections when they are ganged, may
be of the same diameter, thus forming a cylindrical brush,
or if preferred, the sections may be of di?erent diameters
wire, or any other proper material appropriate for use
appropriately stepped to impart tapered effects to the
ment by a ?lamentary core 16, also of steel wire or other
brush.
‘It has heretofore been disclosed to form brushes of
relatively thin annular sections, which can be used singly
or which can be ganged together as multiples upon a
as a ?ll for a rotary brush.
The ?ll material is secured in the channel backing ele
appropriate material, disposed within the bight portions
of the ?ll material and extending longitudinally of the
channel backing of the brush strip.
The brush strip is shown as comprising a single full
turn 17, which starts upon one side of the section and
25 terminates upon the other, and the intermediate turn of
which is rather sharply angled or o?set as at 18 to pro
closed in Whittle Patent No. 2,288,337. The sections,
vide recesses or pockets extending oppositely from the
as disclosed in the patent, are formed by distributing
single shaft or arbor to produce brushes of desired length.
Such sections and a method of forming the same are dis
lugs 11. These recesses receive the end portions 19
double length ?ll material between nested, inner and
and 21 of the strip in such manner that all portions of
outer continuous or closed bands, and then ?anging
the edges of the bands radially outwardly in such manner 30 each side of the resultant brush section lie substantially
in a common plane. In other words, the section provides
as to provide brush sections in which the flanged inner
a flat or nearly flat annulus encircling the hands it) and
band constitutes a channel-like backing element and the
being held between the opposed pairs of lugs 11.
'
sides of the outer band are folded together to provide
a core of more or less key-hole section, holding the ?ll
The termini of the strip in a zone subtending an arc
material in the channel. The resultant sectional units 35 of the length W, overlap and it will be observed that
the ends of the channel backing element are feathered
being formed from closed bands must be fully formed as
to correspond to the angle of the offset 18, thus further
individual units and require a large amount of individual
enhancing the ?atness of the annulus formed by the
work and expense to fabricate.
This invention contemplates the provision of novel
strip.
It will be evident that, if desired, the offset 18 may
be dispensed with and the requisite degree of ?atness of
the annulus formed by the brush section may be obtained
tinuous brush strip material having a channel backing
by extending the feathering at the ends of the strip.
element and ?ll material locked therein by an appro
The overlapped portions at W between the termini
priate core. ' Such strip material may be formed in con
tinuous manner by automatic machinery and in substan 45 of the strip and the offset portion 18, are disposed be
tween a pair of lugs 11 and are secured together by ap
tially any desired length, using a coiled ribbon or strip
propriate piercing means, such as rivets 23, having upset
of sheet metal as a source of material from which
ends 23a, piercing through the lugs 11 and also piercing
the channel backing element of the strip can be formed.
the ends of the channel backing element where they over
In accordance with this invention, this inexpensive brush
lap at W, whereby securely to hold the, channel back
strip is assembled into a highly useful, inexpensive brush
ing upon the band ill. If preferred, the rivets 23 in
stead of piercing the sides of the channel backing ele
For a better understanding of the invention, reference
ment, may merely bite into or indent the outer edges
may now be made to the drawings, in which FIG. 1
thereof to obtain a positive grip upon the latter.
is a view partly in elevation and partly in phantom of
It will be apparent that one of the rivet elements 23
one form of a rotary brush'section constructed in ac
' extends directly across the end portions of the ?lamentary '
cordance with the provisions of this invention.
core 16 to hold the latter in place in the channel against
FIG. 2 is a detail showing in plan one feature of the
centrifugal action exerted when a brush section is mount
invention.
ed upon a shaft orarbor and rotated. The rivets 23
FIG. 3 is a fragmentary plan of a modi?ed form of
‘ the construction.
60 draw the lugs 11 together to exert a clamping action upon
the strip.
_
FIG. 4 is a fragmentary plan view of a further modi?ed
in order further to enhance the security of holding of
form of the invention.
a
the ends of the ?lamentary core 16 in the channels, the
FlG. 5 is a fragmentary section substantially upon
core may be provided with hooked portions 24 at each
the line V-V of H6. 4.
PEG. 6 is a fragmentary sectional view of a further 65 end engaging the rivets 23. These hooked portions con
annular brush sections and a method of forming the
same from short lengths of circularized, but discon
section.
,
v
form of the invention.
.
FIG. 7 is a sectional view of still another form of
the invention.
.
In the construction as shown in FIGS. 1 and 2 of the
drawings, the brush section 5 is provided and comprises
stitute means holding the core against tensional forces. .
One method of forming the brush section as disclosed
in FIGS. land 2, comprises forming a spirally wound
brush strip 12 which has a proper internal diameter and
an inner, rigid, circular band it? providing a core having
which may be of any appropriate length from a length
to form a unit for a single brush section, to a length to
lateral radially projecting ?at lugs 11 formed integrally
provide many multiples thereof. In the latter instance,
3,042,951
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the long strip may be severed into sections of proper
length for single brush units. The ends of the units may
' be feathered to the form shown in FIG. 2 manually, as
by?rst cutting or pulling out a portion of the ?ll mate
rial from‘ the channel at each end, or by appropriate .me
chanical equipment, and then crimping the sides together
to give the desired angle of bevel. The short sections of
spiral thus provided may be suitably squeezed in a press
by pressure applied coaxially of the spirals in order to
form the ‘offset as at 18 in the full length turn 17‘. Oh
viously, other methods may be employed in order to ob
tain the o?setting' effect. One such method comprises ap
plying side pressure by a rolled-upon the strip as it is
~
4
.
the side walls of the channel, holding the ?ll material in
the latter and also assisting in holding the core element
38 of the strip in place, the screws still further assisting
in preventing dislodgeme'nt of the end of the core element.
Cl
In the form of the invention as shown in FIG. 6, the
core element 41 of a brush strip 42 is formed ‘of a
ribbon or tape of sheet metal, which is folded to provide
a key-hole section having sides 43 closely doubled upon
each other. The sides are joined together by intermedi
10 ate portion 44 of substantially circular shape, which
provides a smooth bearing surface within the bight por
tion of the ?ll material, and thus reduces the cha?ng
action upon the latter by the core to a minimum.
wound to form a spiral.
The ends of the single turn of the brush strip and also
The band portion 10 having the lugs 11 is then inserted
the ends of the ?lamentary core 41, are held in place
‘in the inner perimeter of the brush strip. In order readily
between'the lugs 46 projecting radially from the rigid
'to e?ect the latter operation, the band may be inserted
hand 47 by means of transverse screwsJ48, which after
with the lugs 11 disposed in coaxial position with respect
they are threaded through the lugs, the side walls of the
to the band. Subsequently, the lugs may then be turned
channel backing element and thesides 43 of the core,
radially outwardly, the rivets inserted through the lugs, 20 having their points nipped off. for purposes of improving
the ends of the strip and the offset 18, and the terminals
?nish. The screws may be self-threading and held in
of the core 16 may be hooked about the rivet. Other
place by biting into the metal of the lugs or, as shown,
rivets may be inserted through the remaining pairs of lugs
conventional Tinnerman nuts 49 of U-shape may be
upon the edges of the band 19.
.
'
clipped over lugs 46 and function positively to lock the
If preferred, the lugs 11 may be punched or drilled
screws in place.
'
I
prior to the insertion of the rivets, in order to facilitate
It is not precluded to insert short lengths of wire or
the latter operation. It is also not precludedto employ
._rod 44d of appropriatediameter into the circular por
pointed, self-lockingnail elements, which can be driven
tion formed by the intermediate portion 44 connecting
through the metal of the lugs without drilling, if desired.
the sides 43 of the core element. This may further
Subsequently, the points may be nipped olf and the
strengthen the construction and will also prevent the pos
blunted end portions thus formed may be headed over to
sibility‘of ?ll material working out through the joint be
hold the rivets securely in place.
i
e
V .
tween the ends of the core. ' The sides of the rods may
In FIG. 2, but a single rivet is indicated. As shown
be roughened to increase the security with which they
in FIG. 3, the rivets may be paired as at 23b for pur
are held in the core. Alternatively, vit is also contem
poses of ‘greater security. The number of rivets may be 35 plated toinsert short strips (not shown) of sheet metal
increased, if so desired. The rivets may be replaced by
between sides 43 to bridge the joint 31. The screws 48
self-threading screws, if preferred. The points of the
screws, after they have been'threaded through the lugs
11, may be nipped off for purposes of improvement of
will engage and hold the same.
?nish of the, section. If desired, Tinnerman nuts, such as
will be subsequently be described, may be used‘ to hold
brush strip material is cylindrical, that is,vthe lugs upon
the screws in place.
turn upon the core, uashaped clips represented by 52
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In the form of the invention as illustrated in FIG. 7,
the rigid internal band 50
the single turn 51 of
the edges thereof are omitted. In order to hold the single
In some instances, it may be desired to form the brush
and 52a and being of an internal width corresponding to
section of single turns of brush strip material. For this
the width of the band, are provided. These clips are in
purpose, a long brush strip in a helix-like coil of proper 45 'serted within the band ‘50 and the legs thereof project
diameter for the formation of brush sections may be
radially outwardly upon each side to straddle the brush
formed, By sawing or otherwisecutting'through the
strip element. The latter element corresponds to the
channel backing element of this coil along a single line
strip shown in FIG. 6 and is provided‘ with a core 53
_ extending longitudinally of the coil, the latter is severed
formed ?om a tape or ribbon of sheet steel'or similar
. by a single cut into single turn units corresponding in 50 metal, folded to key~hole section as shown. 'A section
number to the number of turns in thecoil. , Each of,
offwire 54 may beinserted in one end of the core and
vor two or more of these severed turns may then be
allowed to project into the other end of'the core to hold
,_ mounted upon’ a band having lugs as shown in FIGS. 1
the two ends together. The ends of the. single turn of
and 2. The turns initially have spiral form’ of slight
pitch, but this is easily overcome and the squarely cut
' , ends are brought into register with respect to each other
by the action of the gripping lugs.
.
‘The formation of a brush section in this manner is
illustrated in FIGS. 4 and 5, in which a single turn 30 of
brush strip material are held within the branches of the
clip 52 by means of a pair of self-threading screws 55,
piercing-the sides ‘of the clip and biting into the side walls
" of the channel backing element and also biting into or
piercing the side portions 56 of the core. Tinnerman
nuts could also be used on thescrews, if desired.
a ‘brush strip is shown as having substantially squarely 60 » As many clips as-may be desired may be employed
.cut end portions as at 31. This single turn is mounted
for purposes of appropriately securing the brush strip
upon band 32, having integral opposed lugs 33 projecting
to the band 50. The clips may be distributed at uniform
radially outwardly from the margins thereof. The two
intervals in order to obtain proper balance of the assem
ends of the single turn are held in tightly abutting rela
bly. If desired, the lugsll and rivets 23 in FIGS. 1
tionship between the lugs by means such as self-thread 65 and 2 may be replaced by U-shaped clips corresponding to
ing screws 34 of‘ well-known type having plain shank
clips 52, and screws 55.
a
" portions 34a and threaded tips as at 34b; .These screws
It is not precluded to form the lugs 11 of FIGS. 1, 2, 3, .are threaded through the lugs and the side walls 36 of
4 and 5 as continuous ?anges upon the edges’ of the cylin
' the channel backing of the'brush strip. It will be ob
drical band. The screws or rivets holding the spiral turns
' served that they bite-into or indent the edges of the side 70 or the single turn of the strip, then extendthrough the
walls ofthe, channel backing as indicated at 37, to pro
?anges to engage and hold the walls, of the channel
vide a positive lock holding the ends of the channel back
ing closely together. The screws also exert a tight clamp
> .The brush sections of this invention may be mounted
ing action, drawing the lugs 33 upon opposite edges of y-co'axially upon artbors or shafts of appropriate diameter,
vthe‘band 32 toward each other, whereby to compress 75 or if that is not practicable because of the large diameter
backing.
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3,042,951
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of the sections, the sections may be mounted upon inter
mediate adapters in well-known manner and then mounted
turns greater than half-circles, whereby one end has a
upon a shaft.
ing disposed between a pair of lugs, the full turn of the
The sections herein shown are relatively inexpensive
portion overlapping the other, the overlapped portion be
brush strip material having an offset portion disposed be- _ ‘
to construct and ‘at the same time, they are strong and
tween the overlapped end portions of the strip, the end
well adapted for operation at high speed or under rela
portions being feathered to ?t within the recesses formed
by the o?setting of the full turn, and securing means
tively heavy loads. The forms of the invention as shown
are by way ‘of illustration only. It will be apparent to
those skilled in the art that numerous modi?cations may
piercing the latter mentioned pair of lugs and engaging
the side walls of the channel backing element, whereby
be made therein without departure from the spirit of 10 the latter element is positively held upon the band, said
the invention or the scope of the ;appended claims.
I claim:
1. A rotary, power-driven brush section comprising a
brush strip having a ?lamentary core disposed within the
channel backing element and positively holding the ?ll
material in place in the channel backing element, the
ends of the core being hooked about the securing means,
at intervals about the edges thereof, the ‘lugs upon one 15 whereby to hold the core in place in the channel backing
element.
edge being paired with corresponding lugs upon the oppo
5. A rotary, power-driven brush section comprising a
site edge, a brush strip having a channel backing with sides
cylindrical band, a circularized brush strip comprising a
in substantially parallel planes ‘and ?ll material disposed
rigid, internal circular band having integral lugs formed
in the channel backing, the brush strip being spirally
channel backing having ?ll material disposed therein,
wound upon the band between the lugs, the ends of the 20 wound around the band and holding clips of U-shape dis
posed astride the band and having the legs thereof pro
jecting radially outwardly, and fastening means compris
stantially ?at annulus, the ends of the strip in the spiral
ing screws transversely piercing opposed pairs of the legs
being overlapped between a pair, of lugs and at least one
to draw the legs together, whereby to grip the strip.
fastening element piercing both lugs of a pairlof lugs and
drawing the lugs together against the side walls, the lugs 25 6. A rotary, power-driven brush section comprising a
cylindrical band, a brush strip comprising a single cir
in the latter pair further engaging the side walls of the
cularized turn of brush strip material, comprising a chan
backing element, whereby to hold the ends of the spiral
nel backing having ?ll material disposed therein, extend
in place between the lugs.
ing around the band and holding clips of U-shape dis
2. A rotary, power-driven brush section comprising an
internal circular band of metal having integral lugs formed 30 posed astride the'band and having the legs thereof pro
jecting radially outwardly, and screws extending through
at intervals around the edges thereof and being radially
said legs and drawing the same together to clamp the
outwardly turned, a brush strip comprising a channel
channel backing.
backing having side walls in substantially parallel planes,
7. A circular brush section comprising a circular, in
spirally wound upon the band and being held between the
lugs upon opposite edges of the band, the ends of the strip 35 ternal band constituting a core for the section, a brush
strip having two ends and having a channel backing cir
being overlapped and being feathered, the overlapped por
cularly wound upon the band, said backing having double
tions being disposed between a pair of longitudinally op
length ?ll material projecting radially therefrom and be
posed lugs, and a pair of rivets extending between the
ing held in place by a ?lamentary locking core disposed
latter pair of lugs and drawing the lugs against the side
within the bight portions of said ?ll material, said band
walls of the channel backing and engaging the side walls
strip being feathered, whereby the strip provides a sub
of the channel backing element where the ends are over
lapped, whereby the latter are positively held in place
having spaced ?at lugs radially outwardly projecting about
the edges thereof, each lug upon an edge being paired
with a lug upon the opposite edge, the lugs upon a side
being in a common plane, both ends of said brush strip
internal circular band of metal having integral lugs 45 being disposed between a pair of lugs, and piercing means
extending through the outer ends of both lugs of a pair
formed at intervals around the edges thereof and being
and across the ?lamentary core and securing the same in
radially outwardly turned, the lugs upon one edge of the
place, said piercing means engaging both ends of said
band being paired with those upon the other edge, a
brush strip to hold the same between said pair of lugs,
spirally wound brush strip upon the band and being dis
posed between the pairs of lugs, said strip having a chan 50 and having head means upon both ends securing both lugs
together whereby the ?lamentary core is secured in place
nel backing element with side walls in substantially paral
against centrifugal force when the section is rotated and
lel planes and ?ll material disposed therewith, the strip
whereby the lugs are secured against the sides of the
comprising at least one full turn, the ends comprising
channel backingto secure the brush strip upon the band.
partial turns which are slightly greater than half-circles,
8. A rotary, power-driven brush section comprising a
whereby one end portion overlaps the end of the other, 55
circular,
internal band constituting a core for the section,
the overlapped portion being disposed between a pair of
said core having integral ?at lugs formed about the edges
lugs, the full turn of the brush strip having an offset por
thereof, the lugs being radially outwardly turned and the
tion disposed between the overlapped end portion of the
lugs upon an edge lying in a common plane, and each
strip, the end portion being feathered to ?t within the
recesses formed by the offsetting of the full turn, and 60 lug being paired with a lug upon the other edge, a brush
strip circularly wound upon the band and having a chan
means piercing both lugs of the lugs of the latter men
nel backing, radially projecting, double length ?ll ma
tioned pair of lugs and drawing lugs against the side walls
terial disposed between the walls of the channel backing
and further engaging the side walls of the ‘channel back
and being held in place by a ?lamentary core, and screws
ing element, whereby the latter element is positively held
transversely threaded through both of a pair of lugs and
upon the band.
65 crossing the ?lamentary core, said screw having nut means
4. A rotary, power-driven brush section comprising a
threaded thereupon whereby when the screws are rela
rigid, internal circular band of metal, having integral lugs
tively rotated therein, the sides of the channel backing
formed at intervals around the edges thereof and being
element are drawn toward each other to clamp the chan
radially outwardly turned, the lugs upon one edge of the
nel
backing element, said screws biting into the edges of
band being paired with those upon the other edge, a 70
the channel backing element whereby to secure the strip
spirally wound brush strip upon the band and being dis
upon the band.
posed between the pairs of lugs, said strip having a chan—
9. A rotary, power-driven brush section comprising an
nel backing element with side walls and ?ll material dis
internal, circular band of metal constituting a core, said
posed in the channel backing element, the strip compris
core having integral ?at lugs formed at intervals around
ing at least one full turn, the ends comprising partial 75 each of the edges thereof, the lugs upon opposite edges
upon the band.
3. A rotary, power-driven brush section comprising an
3,042,951
8
having a circularized ebrushrstrip comprising-a channel
backing having doubled ?ll material, said channel backing
being ‘disp'osed'upon the band, ‘said band having means
associated therewith for clamping the brush strip in place
and comprising a separate Up-s’naped clip element having
opposed legs straddling the band and abight portion dis
posed Within the band, and having fastening means pierc
ing both legs'and drawing them together'in clamping
being paired with corresponding lugs upon the opposite
edge, and the lugs upon an edge lying in a common plane
and "being radiallyroutwardly turned, and a brush strip
having a channel backing with sides in substantially par
allel planes, and ?ll material disposed within the chan
nel backing and radially projecting therefrom, said strip
comprising a single turn circularized upon the band and
having abutting end portions, the abutting ends of the
channel backing element being disposed between a pair of
lugs and a pair of piercing fastening elements extending
engagement with'respect to the side walls of the channel
backing element.
whereby the latter element is held in circularvform when
the brush is rotated.
drawing the legs of the U-shaped clamping element to
'
10. A rotary, power-driven brush section comprising a 15
circular band constituting a core for the section and
having integrally formed, radially outwardly turned, ?at
lugs formed about both of the edges of the band, the lugs
on each edge being disposed in a common plane and lugs
upon one edge being paired with corresponding lugs upon 20
the other edge, a brush strip having a channel backing
gether.
ing element, saidstrip comprising a single turn wound
about the band with the sides of the channel backing ele
as
ends of the 'single turn and pairs of fastening elements
extending through the abutting ends, the latter of said
pairs of-lugs near theprojecting ends thereof, said fas
, etening elements being screws and nut means upon the 30
screws for drawing thelugs of the last-mentioned pair
toward each other whereby to clainp the side walls of the
channel backing element and to hold the same upon the
band and between’ the lugs. '
‘
11. A rotary, power-driven brush section comprising an 35
internal, circular band constituting a brush core and
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13.’ The construction as‘de?ned inclaim 7 wherein the
?lamentary locking core is provided at its ends with means
engaging the piercing means’ to hold the ?lamentary core
in place against tensional forces.
,
'
References Cited in the tile of this'patent
V UNITED STATES PATENTS
element and ?ll material disposed in said channel back
ment in substantially parallel planes and being disposed
between/pairs of lugs, the lugs of one pairl'gripping the
‘
12. The rotary, power-driven brush section as de?ned
in claim 11 wherein the fastening means comprises a
screw element having nut means threaded thereupon for
through the latter pair of lugs, one fastening element being
disposed in each end of the channel backing element
612,157
Cook __..___-_.__..___-.._- Oct. 11, 1898
1,475,074.
1,683,618
McLaughlin _____‘..._.;____ Nov. 20, 1923
Hoffman .;;_;_'_.‘...___,-_._'_ Sept. 11, 1928
1,706,159‘
2,316,185
'
Herold ______ _‘_'_ _____ __ Mar. 19, 1929
Peterson _________ __'___'_. Apr. 13, 1943
2,349,643
Wesemeyer .._____ ______ __ May 23, 1944
2,379,205 5
Wesemeyer‘_______ __.>____,June 26, 1945
2,609,559
Peterson .._; ___________ __ Sept. 9, 1952
2,820,235 ‘I VNelson _.v.__> ______ _'__-~__._ Ian. 21, 1958
p
'
347,597 ,
‘
FOREIGN PATENTS
Germany _____________ __ Ian; 23, 1922
555,950
Great Britain _________ __ Sept. 14, 1943
789,508
Great Britain .___ _______ __ Jan. 22, 1958
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