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Патент USA US2410152

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Ocî. y29, 1946.
2,410,152
l G. E. DA1-H
FRICTION SHOCK ABSORBING MECHANISM
Filed June 25, 1943
/5/41 C”
24
v
Jìzvefztor’
George _ELEM
By w
Patented oct. 29, 1946
2,410,152 ‘
UNITED STATES PATENT OFFICE
2,410,152
FRICTION SHOCK ABSORBING
MECHANISM
George E. Bath, Chicago, Ill., assignor to W. H.
Miner, Inc., Chicago, Ill., a corporation-of Dela
Wale
Application June 25, 1943, Serial No. 492,258
10 Claims. (Cl. 213-34)
1
2
This invention relates to improvements in yfric
tion shock absorbing mechanisms.
by a transverse vertical wall l0 which projects
at opposite sides beyond the side walls of the
The main object of the invention is to provide
a friction shock absorbing mechanism, especially
adapted for draft riggings of railway cars com
prising a friction casing closed at one end and
having the other end open, a friction clutch in
cluding a central wedge lblock and friction shoes
surrounding the `wedge block, and a spring re
sistance opposing movement of the clutch in
wardly of the casing, wherein the spring resist
ance and clutch are insertable through the open
end of the casing, and the parts of the mecha
nism are held assembled by shouldered engage
ment between casing and the wedge member of
the clutch.
'
casing to provide a rear follower member of rec
tangular outline which is integral with the cas
ing. The follower member is reinforced by webs
Il-II formed integral with the same and the
casing side walls. The friction shell section of
the casing is provided with six interior, substan
tially flat friction surfaces {v2-_I2 which converge
inwardly7 of the casing and are spaced symmetri
cally about the central longitudinal axis of the
mechanism. The interior of the friction shell
section thus presents six interior friction surfaces,
adjacent surfaces of which are angularly dis
posed with reference to each other, thereby pro
viding three pairs of surfaces, the adjacent mem
bers of each pair together forming a friction face
A more speciñc object >of the invention is to
provide a friction shock absorbing mechanism
of V-shaped transverse Cross section.
as specified in the preceding paragraph, where
At the open end the casing -is provided witha
in the wedge is in the form of a collapsible split
continuous inturned retaining flange I3 which
member having lateral flanges in shouldered en
overhangs the opening and forms limiting stop
gagement with the casing to limit outward .move
means for vthe wedge block.
ment of the wedge and thereby hold the mecha
The wedge block B is centrally divided in
nism assembled, and wherein the wedge is held
lengthwise direction, thereby providing two simi
expanded and in shouldered engagement with .the 25 lar sections lli-I4. The split wedge block B,
casing Iby a spreading member in the form of a
which is preferably hollow, as shown, is of hex
spring follower cooperating with the friction
agonal transverse cross section and has six in
shoes, the wedge being collapsible when said
wardly converging fiat wedge faces |5-I5 ar
spreading member is disengaged therefrom to
ranged symmetrically about the central longitudi
facilitate assembling of the parts of the mecha 30 nal axis of the mechanism. Three adjacent pairs
msm.
of wedge faces are thus provided, the two wedge
Other objects of the invention will more `clearly
faces of each pair together forming acombined
appear from the description and >claims herein
wedge face of V-shaped transverse cross section.
after following,
In the drawing forming a part of this specifica
At the outer end the split block B has a flat
35 transverse abutment face I6, adapted to receive
tion, Figure 1 is a front end elevational view of
the actuating force, one half of said face being
a friction shock absorbing mechanism embody
ing my improvements. Figure 2 is a horizontal,
formed on each section of the block.
longitudinal sectional view, corresponding sub
B is divided on a longitudinal plane intersect
.
As shown most clearly in Figure 1, the block
stantially to the line 2_2 of Figure 1.. Figure 3
ing the longitudinal central axis of the wedge
is a view, similar to Figure 2 of the front end
and two diametrically opposite corners of the
portion of the mechanism, illustrating the man
same. Each section I4 of the block thus has
ner of assembling the parts thereof.
three of the sides of the hexagon outline of the
As shown in said drawing, my improved fric
wedge, one of the sides of which is parallel to
tion shock absorbing mechanism comprises 45 the dividing plane of the wedge. At the last
broadly a casing A, providing a Combined fric
named side, each section I4 of the wedge is pro
tion shell and spring cage; a two-piece split
vided with a laterally outstanding stop flange
wedge B; three» friction shoes C~C-C; a com
l1. Two Adiametrically opposed stop flanges
bined spring follower and spreading member D;
ll-l‘l are thus provided on the block B which
and a spring resistance E.
50 are adapted to engage in back of diametrically
'I‘he >easing A is of substantial hexagonal inte
opposed portions of the inturned flange I3 of the
rior and exterior cross section having the fric
casing to limit outward movement of the wedge
tion shell section at the forward end which is
and hold the same assembled with the casing.
open, and the spring cage section at the vrear end
The stop flanges I'l-ll vof the Wedge block B are
thereof. The casing A is closed at >the rear end 55 located Some distance inwardly of the wedge
2,410,152
3
4
block, as shown most clearly in Figures 2 and 3,
whereby a substantial portion of the block nor
mally projects beyond the outer end of the casing.
At the outer or forward end of the block B,
ends bearing respectively on the spring follower
D and the wall I0 of the casing A. The spring
resistance E is preferably under initial compres
sion in the assembled condition of the mechanism.
the sections thereof are normally in bearing con
tact with each other. Immediately to the rear
of the c-ontacting portion the 'side walls of the
sections l4-I4 are cut away along the opposed
edges of said sections, as indicated at lil-i8, to
sistance E, the combined spring follower and
spreading member D, and the shoes C--C-C are
first placed within the casing A by inserting these
In assembling the mechanism the spring re
parts through the open front end of the casing.
With the casing A standing on end, the spring
follower D is forced inwardly by a cylindrical bar
like tool 28 engaged with the outer end of the
provide clearance to permit collapsing of the
wedge in assembling the same with the casing,
as hereinafter pointed out.
As shown in Figure
post 21 of the follower D. As the spring follower
2, the opposed side edges of the cut away por
tions are substantially parallel in the assembled
D is forced inwardly, the shoes C-C-C, which
condition of the mechanism and present substan
tially flat opposed abutment faces |9-I9 on said
sections Ill-I4 at each side of the wedge block,
adapted to cooperate with the combined spring
follower and spreading member D, as hereinafter
therewith. When these parts have been displaced
inwardly of the casing approximately to the po
sition shown in Figure 3, the wedge B in the col
lapsed condition shown in Figure 3 is entered
pointed out.
'
are resting on the follower, will move inwardly
20 within the casing to an extent that the retaining
At the outer end thereof, the sectional wedge
block B is provided with a central opening 20 to
accommodate a tool in the form of a cylindrical
bar used in assembling the device, one half cf
this ‘opening being provided in each section
flanges l'í-Il of the wedge will be disposed in
wardly or to the rear of the inturned ñanges i3 of
the casing. The tool 28 is then withdrawn from
engagement with the combined spring follower
and spreading member while the wedge is held in
the position shown in Figure 3. At the same time
the sections M--lli of the wedge are rocked on
each other at their outer ends to spread the inner
ends apart and permit entry of the post 2l of the
combined spring follower and spreading member
Ill-I4, the abutting edges of the outer end por
tions of said sections being notched for this pur
pose. At the inner end, the opposed inner side
portions of the sections Ill-I4 are also cut out
or notched, as indicated at 2l-2I, to provide, 30
D therebetween as the member D is forced out
when the wedge is collapsed as shown in Figure 3,
wardly by the expansive action of the spring re
an opening 22 in alignment lwith the opening 2E
sistance. As will be evident, the ñanges l'i-l'l
at the front end of the wedge through which the
of the wedge block B are thus brought into the
assembling tool may be passed.
operative position shown in Figure 2, in back of
The friction shoes C, which are three in num
the flange I3 of the casing, to limit outward move»
ber, are interposed between the Wedge block B
ment of the wedge block.
and the interior friction surfaces I2 of the casing.
The operation of my improved shock absorb
The three shoes C are of similar design except
as hereinafter pointed out. Each shoe has a fric
tion surface 23 on the outer side thereof of V
ing mechanism is as follows: Upon inward move
ment of the wedge B with respect to the casing A
40 being produced due to the compression of the
shaped transverse cross section which cooperates
mechanism, the spring resisted friction shoes are
wedged apart and carried inwardly of the mech
anism compressing the spring resistance El. High
the side nearest the central axis of the mech 45 frictional resistance is thus produced between the
friction surfaces of the shoes and casing. Upon
anism, each shoe has a wedge face 24 of V-shaped
the actuating force being reduced, the expansive
transverse cross section cooperating with two ad
action of the spring resistance E returns all of
jacent wedge faces I 5-l5 of the wedge block B,
the. parts to the normal position shown in Figure
the two portions of the wedge face 24 forming the
V being substantially fiat and correspondingly in 60 2, outward movement of the wedge being limited
by shouldered engagement of the flanges I1
clined to the cooperating wedge faces |5-l5 o-f
thereof with the flanges I3 of the casing A.
the wedge block. The engaging wedge faces of
I have herein shown and described what I now
the wedge and two of the shoes are preferably
consider the preferred manner of carrying out
disposed at relatively blunt wedging angles with
respect to the- longitudinal central axis of the
my invention, but the same is merely illustrative
and I contemplate all changes and modifications
mechanism, and those of the wedge and the re
maining shoe are preferably disposed at a rela
that come within the scope of the claims ap
with the corresponding V-shaped friction face of
the casing formed by two adjacent surfaces
l2-l2 of the casing. At the inner side, that is,
tively keen wedging angle Iwith respect to said
axis.
At their rear ends the shoes C-C--C are
pended hereto.
I claim:
provided with substantially flat, transverse abut
1. In a friction shock absorbing mechanism, the
ment faces 25 adapted to cooperate with the 60 combination with a friction casing open at one
spring follower section of the combined spring
end and permanently closed at the other end,
follower and spreading member D.
said casing having interior stop shoulders at said
The combined spring follower and spreading
open end; of a sectional collapsible wedge block,
member D comprises a heavy platelike section 25 f each of said sections of the block having a lateral
of hexagonal outline having a forwardly project
projection, said projections being engageable with
ing central post member 2T formed integral there
said shoulders of the casing to limit outward
with. The post member 21 is of substantially rec
movement of the wedge; friction shoes having
tangular cross section and of such a thickness
sliding engagement with the interior walls of the
as to ñll the space between the opposed abutment
casing and wedging engagement with said wedge
faces IE7-«I9 of the sections M-M of the-Wedge 70
block;
spring means opposing inward movement
B, to hold said wedge expanded as shown in Fig
ure'2.
The spring resistance E comprises a relatively
heavy outer coil and a lighter innerfooil. The
of said shoes; and means engaged between the
sections of the wedge to hold the same expanded
with the lateral projections thereof engaged in
coils of the spring resistance have their opposite 75 back` of the stop shoulders of the casing.
:2,410,152
6
2. In a friction shocklabsorbing mechanismthe
combination with a friction casing lopen at ‘one
end and permanently closed at the V.other end,
said casing having inturned stopflangesat‘said
open end; of a plurality lof vfriction shoes ¿having
sliding frictional engagement vwith the interior
of said casing; a sectional collapsible wedge block
having wedging engagement with saidshoes, Yeach
‘ 6. Ina friction shock absorbing mechanism,
the combination’with a friction casing open at
one end and having inturned stop flanges at said
open end; of a'plurality of friction shoes having
sliding -frictional engagement with the interior of
said casing; a two-piece lengthwise divided sec
tional collapsible wedge block having >wedging
engagement with said shoes, the sections .of said
wedge block having laterally projecting flanges
laterally .projecting flange, said flanges beingrv en .10 engageable in back of the flanges >of the casing
of the sections of said wedge block having a
gageable in back of the flanges of the casing :to
limit outward movement of the wedge; a spread
ing member engaged .between said sections of the
wedge to hold the wedge expanded with the
flanges thereof in position to engage said flanges g
of the casing; and spring means Ayieldingly re
sisting inward movement of the shoes.
3. In a friction shock absorbing mechanism, the
to limit outward movement of the wedge; a
spreading member engaged between said sections
of the wedge -to hold the wedge expanded with the
flanges thereof in position to engage said flanges
of the casing; and spring means yieldingly re
sisting inward `movement of the shoes.
-
‘
~„7._In _a >friction shock 'absorbing mechanism,
the` combination with a friction casing open >at
combination with a friction casing open at one
one end and having inturned stop flanges at
end and permanently closed at the other end, 20 said open end; of a plurality of friction shoes
said casing having inturned stop flanges at said
having sliding frictional engagement with the
open end; of a plurality of friction shoes having
interior of said casing; a two-piece lengthwise
sliding frictional engagement with the interior
divided collapsible wedge block having wedging
of said casing; a sectional collapsible wedge block
engagement with said shoes, the sections of said
having wedging engagement with said shoes, each
wedge block having laterally projecting flanges
of the sections of said wedge block having a
engageable in back of the flanges of the casing
laterally projecting flange, said flanges being en
gageable in back of the flanges of the casing io
to limit outward movement of the wedge; a com
bined spring follower and spreading member
comprising a spring follower plate section bear
ing plug engaged between said sections of the 30 ing on the inner ends of the shoes, and a for
wedge to holdv the wedge expanded with the
wardly projecting spreading plug on said plate
flanges thereof in position to engage said flanges
section engaged between the two sections of the
of the casing; and spring means yieldingly re
wedge to hold the wedge expanded with the
sisting inward movement of said shoes and said
ñanges thereof in position to engage said flanges
plug.
‘
of the casing; and spring means within the cas
4. In a friction shock absorbing mechanism, the
ing yieldingly opposing inward movement of said
combination with a friction casing open at one
combined spring follower and spreading member.
end and permanently closed at the other end, said
8. In a friction shock absorbing mechanism,
casing having inturned stop flanges at lsaid open
the combination with a friction casing open at
end; of a plurality of friction shoes having slid 40 one end and having inturned stop flanges at said
ing frictional engagement with the interior of
open end; of a plurality of friction shoes having
said casing; a sectional collapsible wedge block
sliding frictional engagement with the interior
limit outward movement of the wedge; a spread
having wedging engagement with said shoes, each
` of said casing; a two-piece lengthwise divided
of the sections of said wedge block having a
wedge, having wedging engagement with said
shoes, the sections of said wedge being laterally
laterally projecting ñange. said flanges being en
gageable in back of the flanges of the casing to
limit outward movement of the wedge; spring
spaced from each other at the inner end of the
wedge and having fulcrumming engagement with
resistance means within the casing; and a spring
each other on their innerr sides at the outer end
follower plate interposed between said spring re
of the Wedge; each section of said wedge having
sistance and shoes, said spring follower having a 50 a laterally outwardly projecting flange engage
spreading post thereon engaged between the
able in back of the corresponding flange of the
sections of the wedge to hold the wedge expanded
casing to limit outward movement of the wedge;
with the flanges thereof in position to engage said
a combined spring follower and spreading mem
flanges of the casing.
ber comprising a spring follower plate section
5. In a friction shock absorbing mechanism,
bearing on the inner ends of the shoes, and a
forwardly projecting spreading post on said plate
the combination with a friction casing open at
one end and permanently closed at the other end,
section projecting into and filling the space be
said casing having inturned stop flanges at said
tween said sections at the inner end of the wedge
Yopen end; of a plurality of friction shoes having
to hold said sections separated with the flanges
sliding frictional engagement with the interior 60 thereof in position to engage the casing flanges;
of said casing; a sectional collapsible wedge block
and spring means within the casing opposing in
having wedging engagement with said shoes, each
ward movement of said combined spring follower
and spreading member.
of the sections of said wedge block having a lat
erally projecting fia-nge, said flanges being en
9. In a friction shock absorbing mechanism,
gageable in back of the flanges of the casing to 65 the combination with a friction casing open at
limit outward movement of the wedge; spring
one end and having inturned stop flanges at said
resistance means within the casing; and a com
open end; of an annular series of three friction
bined spring follower and spreading member,
shoes having sliding frictional engagement with
comprising a spring follower section and a pro
the interior of the casing; a two-piece lengthwise
jecting post engaged between the sections of the
wedge to hold the Vwedge expanded with the
flanges thereof in position to engage said ñanges
of the casing, said spring follower section being
interposed between the spring resistance and the
inner ends of the shoes.
75
divided collapsible wedge block having wedging
engagement with said shoes, the sections of said
wedge block having laterally projecting flanges
engageable in back of the flanges of the casing
to limit outward movement of the wedge; a com
bined spring follower and spreading member
2,410,152
7
comprising a spring follower section bearing on
the inner ends of the shoes, and a forwardly pro
jecting spreading plug, formed on said spring
follower section engaged between the two sec
tions of the wedge to hold the wedge expanded
with the flanges thereof in position to engage
said flanges of the casing; and springs resisting
inward movement of said combined spring fol
lower and spreading member.
10. In a friction shock absorbing mechanism, 10
the combination with a hexagonal friction cas
ing having six interior, longitudinally extending,
inwardly converging, interior friction surfaces,
8
friction surfaces of the casing; a two-piece
lengthwise divided collapsible Wedge block hav
ing wedging engagement with said shoes, the
sections of said wedge block having laterally pro
jecting fianges engageable in back of the flanges
of the casing to limit outward movement of the
wedge; a combined spring follower and spread
ing member comprising a spring follower section
bearing on the inner ends of the shoes, and a
forwardly projecting spreading plug formed on
said spring follower section engaged between the
two sections of the wedge to hold the wedge ex
panded with the ñanges thereof in position to
engage said flanges of the casing; and springs
and inturned stop flanges at the outer ends of
said friction surfaces; of three V-shaped friction 15 resisting inward movement of said combined
spring follower and spreading member.
shoes arranged symmetrically about the longi
tudinal axis of the mechanism, each of said shoes
GEORGE E. DATH.
having sliding engagement with two adjacent
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