close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2383032

код для вставки
Aug. 21, 1945.
J. ABERNETHY
.'
2,383,032
LAICHING IBCHANISI
Filed Oct. 13,
.
46
/
'06
.
I
2 Sheets-Sheet 1
1/2
1/0/08
I’
g’:
F? 3
_
V
'
I2
164'
L
4
INVENTOR.
YJo/m Abernathy
‘W
.
_
ATTORNEY
Patented Aug. 21, 1945
2,383,032
3
" 72,383,032
'
'
:
' John Mmrnetliy,v Bqrherton,‘ Ohio! assignor to The
-' *Babcock?z Wiléox Coi'n'pany, Jersey City, N. J .,
The-,iqvention- diwlwéherein mlates m a ,
letqhiég. meehanism mmcularely -.apn1ical2.l§; to
{mace deors Oi
aniweishts. such
smcwreu?mémg
modi?éfi form 0: latchmg'f
meqhanism; - and,‘
Fig. 8 is a fragmentar’yiblén view of Fig.1
doors being conveniently of_ igne horizontally
panglyinsecgiqn. V.
and the movable Pm 9i the. latch‘ rlin > The enbqdiz'nentgwselected fqsr illlustgratvion in
nae-‘91.1
_ hm pi. e tyneegtuated @Heastv in
bi geliéréllsjc ‘rswt'a'psmar Outline having ‘a hinged (ionnectién with aidw'rl tramp l1." provided by the
ma 9111' m .éxnénqmg mreugh lugs , m on. the
q
.. “with the‘, 148.1 latching-mechanisms for non?
\ZQQWIQY:
.QQQ?e?Me-H??i?g emit»
WWMFQ ?zwhqeik?equently hepnens that when 49 ggp?fandlggsqil? pnihe‘fr-dnle. ,Hqles 20 are pro
the.
.x?yméé ageimt its ‘seat, that is into ' vided ?qij qonvéniwcé-mmqlin?ng ibqframé up
Winn: qlwsi. Maggi the-remil at
door . Iig?i} against} lfumm,;e, well», Vior example,.with
We, iframévg'mqlféllZ-p'mlfiding 806% to th“:
xetwsi-itr-tezawsmeqpogitm wnemétne lamh
mama: th?rrumasielwhéggthe door is 09m
nogrgm i; f reeesjsedfgonstruction havms.
can be TO!!! I1 grévitriats; la?tzhinmnaase= .145
"qr rim :4 Surround
meme; qrnif _1atqh.1¥.1$;§hw1.d.~9¢¢ur. it,
hegqnly ' a ,gmmucus
tewliolfarywsiaémheenexsy Qt Maggi; 15,. mi.
minimum‘ ,2; ‘wd'QWinE a narmw head
o'r'r'idge 25 adapted to éng'age 5"s'ea1ing strip 28
narily'su?qientzw fvmmhs: mm nut 9f engage
. g1. gshe?tps anvvthe like ,on the door ‘frame [2 tor
taken
meat-21H
pm?» 1* suqdgn
ill-Stews.
'vrewre
wine-‘imbue
91. 8%;
mm J10 the puypoge pi meeting a gets-tight closure of the A
ill-the fumwe may #18,» be-sut?ckm w
‘1.1% ' amrme 22, the‘ recess‘ space inwardly of the rim
uewommqqating a §[email protected] reira‘cwry material
engagement.
.
- '
3‘! as fa; pl'?t?ctioxi'fdrvthe dog; irl-q?m. furnace heat.
;, ‘An db'eQt-ni the. in'vté'ntiqn lszthqiefqm $011.1:
Jigs-T1; 2 and sfsncw ,tlieldqqr in me my
without. attentiomon the, Part, 01; theomramlr 25 closed nositian iniwhiqhf'it is semen held by. a
other than tqapplmsu?icimt force tQ thejéqqg ' gavel t0rm9f=lat¢hmm¢ch8¥1i$mcomprising a
movable 'la-tgh '32,. @iithe gravimyeactuated type in
to Swing it intq’the. slesimq latching
A w’ < "
§ure ~positive-‘1awhins.»°f.. a (1.00;, qutqmtigally.
engagement’ with" 5 statiqnqr'y' catch 34. ,‘I‘he
A related qbimisitqfpmvide‘eucne?ams 9f '
latch 3Z-i$ pimtallywsunmr?edi 9n the door 1",
in
latch and-watch
one of nrpluralivtiy
aim insure
pfpgeqlegepmineqdhtghw
Positive
30 ammuway betwéqn-ité Kin and‘bnttom. edges,
fmg
91051118»
PQ§itiQns¢¢
‘
wbichtlaé-sloqx
.
> :2
PEI
beswn <2
zonally
Qf, ?héelatch pin 36.iavhich e‘xtends horié
substan?ially parallel relation ,to the
plane. 91 engagement 9f. the 16.09.11 with the frame,
$130.11 a‘ plalieheihaqmnlaqed inwardly from the
automaticami irrespective-qt! itheiqm-apnlied .tq
thedopriomlq?ne;
35. @2115‘. Q1‘ djqq; ‘movéinimit'
being xegarded for
An‘ additionalnbieqt Jshtq automawcaliigmszé - gqnvenience, of desicriptiqn ‘as: nthe'iplan'e oi? sur-.
vide an additional impulse, supplementingjhle
24m tangen?te‘thc Dead. 2,51% its’ ?n and ap
pmmmly midwayiihqw?enlthe inner swim
of
tome.
thedue
mm
to-,grav1tm;f§2.ra¢w1eratins
mm latching PQSi?qn.’ .'
1' -_ ‘
$3 p11 the. $1,991? flange 24 @na théoppésing 'surfabe
, IP15 ,i)'r:9P0$¢§.'a-15Q~2t<?:-.1,1.1$1%Ie205m"? latching
.‘ Oth'er
. ,
_ objects
.
. .
ad?ntagewill bq’apmm
mm thejfollewins?qtailed qesc?ptioq-pt
selected embQdimmt-s» ~91! @129
ins also'the?accommnymgdmws
49 40 an the frame?ange'él- . ‘The latch pin?“ may
‘ ' he‘ iqrméq withk hea'd?i am“; outer end and may
emu mm a: bearing bféckqet 4.5 integral with
qqnsistén
awh e
the.‘ 971190.12 9r . ',suitab11-.:a§w¢héd 'Tthe'reté, ' 'Where
its
. Figshlwanld
2_. are} on,
in .7
v.
:111.<11§1<,1Q~§1§W1Pi0n&1
45
and. mwvbe'smuliad
views. respecqvelyyillustratmsim embmisaenségf. '
am" Ell-M one: side‘ ‘9f
the inventive'iw-fumacqdqommactm; ;
Q1? lawn 129113 ‘15.? '
Fig-3‘is;eplmviwsii?ewlr partly
; "
sestiqn
hya P111 ‘8- . ' . -
l‘belatch éliis ;foxme<.1ias;.,a, lever Withthé lawn
51GB
"Wt; nil; ' 36 'qarwing
‘ ?ll?lli?llli 54 1111 £318- ' Qthel?
‘the. nivqt, nmcarrying .théllandlq 55-. In
this '1 embodiment’ the arm" 54' 'is enlar‘gédl 5,1? . its
.
‘i is .8- ws‘pectiveview §howing memo; 9i §° 2mm provide
Pie-1 in.
h9$$ 58. fare-weaving. airbd 6"
about
the Spring}? is @sembléd; #116 the
'rqq Jam; spring hgldiin
by nuts lifon the
threaded .qnpqslteends’ ?ber-9d 50 't'o'iérm the
Qanélé??;
j The ‘1am- bolt
. 1 5211s‘ iill?ll'e'fqhh
2'1 1 '1"
41f, 3‘ PI°J§<>~
‘
2
2,383,032
tion extending laterally and horizontally from
predetermined position of rest, the weight of the
the latch arm 50 in parallel relation to the latch ‘
latch arm 54 and handle 56 overbalancing the
weight of the latch arm 50 and bolt 52 and tend
ing to rotate the latch clockwise beyond the po
sition shown, a lug 90 however being formed on
the door l0, preferably on the marginal wall or
pin 36, and in cross-section is somewhat ellipti
cal in shape although in practice it may be
formed as a rhomb with the corners normally
formed at the interesctions of its ?at sides suit
ably rounded for smooth cooperation with certain
door ?ange 24, to provide a stop for the latch by
engagement of the upper surface 92 of the latch
by. The elliptical cross-section is formed about
arm 50 with the undersurface 94 of the lug to
major andminor axes arranged for example as 10 maintain the latch bolt 52 at the proper level for
indicated in Fig. 2, with the major axis, if ex
engagement with the sloping surface 80 of the
tended, intersecting the longitudinal axis of the , xvcatch as the door is being closed. The lug 80
latch pin 36, and of a length approximately one
'allows the latch arm 56 to rotate slightly beyond
and~three~quarter times the length of the minor I the position normally occupied when the door is
axis. Other suitable lengths of major axis may 15 fully closed, a vertical clearance of about 1‘; inch
be utilized ranging approximately from one-and
vbeing provided between the surfaces 92 and 94,
one-half to two times the length of the minor
as indicated in Fig. 2, to enable the latch arm 56
axis. The term “elliptical,” as used herein for
to be rotated to a position where the bolt 52 is
convenience in de?ning such a shape, is to be
?rmly wedged against the latching surface 84,
interpreted as embracing not only a true ellipse
without interference from the lug 90, while al
but also such other rhomboidal shapes in approx
lowing for an additional amount of clockwise ro
imation of an ellipse which will serve the same
tation to insure ?rm seating when the cooperat
purpose.
.
ing'surfaoes become worn or the packing 28 be
The catch 34 provides a plurality of'latching
comes compressed.
‘
positions, in this instance two, and in each of 25
The door may be swung slowly to a closed po
these positions the door is securely held against
sition by exerting pressure against the door either
a force tending to swing the door outwardly, such
with or without manipulation of the handle 56,
as might result from an explosion of gas within
whereupon the latch bolt 52 will ride downward
the furnace. - The catch has a keeper portion 66
ly along the forward camming surface 80 below
formed as a depending hook having its tip 68 be 30 the tip 68 into the ?rst or “safety” latching po
low the horizontal pivotal axis of the latch 32 as
sition against the lower latching surface 82 with
determined by the centerline of latch pin 36, a in recess 88 and then into the second latching
unitary ?ange 70 being provided which by means
position against the upper latching surface 84,
of cap screws 12 enables the catch to be secured
the handle 56 then being pressed down to clamp
to the frame I2. The head of each screw 12 may 35 the door ?rmly against the packing 28.
be welded at a spot 14 to prevent the screw from
However, it is more frequently desired to effect
loosening, or other suitable locking means may
a quick closing of the door by slamming and this
be utilized.
'
may readily be accomplished either by a light or
A narrow extension 16 on the catch, terminat- '
heavy slam, provided sufficient force is applied by
surfaces on the catch which are engaged there
' ing in a nose 18 above the level of the latch pin
36, is formed with a forward camming surface
80 inclined upwardly at an angle preferably less
than 45° and slightly concaved throughout its
extent from the tip 68 to the nose 18. In prac
tice, it has been found desirable to provide an an
gularity of 28° from the horizontal for the cam
ming surface 80 and ‘a maximum concavity of
about 11;" at the center.
'
'
The body of the hook or keeper portion 66 is
formed with latching surfaces 82 and 84, these
being in stepped relation for engagement by the
latch bolt 52 for different positions to which the
door may be swung in closing, the lower surface
82 being substantially vertical, and the upper
surface 64 steeply inclined to the horizontal to
within about 8° of the‘vertical, the transition
from one latching surface to the other being
gradual due to the reversely curved connecting
surface 86, and a recess 88 being formed at the
juncture of the adjoining surfaces 82 and 86.
When the door is fully closed, as illustrated in
Figs. 1, 2 and 3, with the bead 26 in sealing con
tact with the packing strip 28, the latch bolt 52
is at the same level ‘as the latch pin 36 with the
major axis of its elliptical cross-section on a hori
zontal line intersecting the centerline of the latch
pin 36. In this position, the centerline of the
handle 56 is at an angle of about 10° from the
vertical.
»
'
'
,
The door may be opened by an upward lift on
the handle 56 whereupon the latch bolt 52 is re
leased from engagement with the inclined latch
ing surface 84 and rotated ‘counter-clockwise to
clear the tip 68 of the catch. Fig. 4 'sh'ows'the
door in an open position with the latch 32 in a
40 the operator to cause the door to be brought into
contact with the frame as in the case of other
free swinging doors with gravity-actuated latches.
When the door is slammed, the sudden engage
ment of the latch bolt 52 with the camming sur
face 86 imparts a high rotational velocity to the
latch 32 in a counterclockwise direction, away
from the latching position, and unless there is
prompt reversal of such movement and a high
rotational velocity of the latch on the return,
there is an opportunity for the door to rebound
and move away from the frame to a position
where the bolt 52 cannot engage either of the
latching surfaces 82 and 84. The operation of
closing the door would therefore have to be re
peated, with the operator having to judge the
degree of slam which will bring about the desired
result.
According to the present invention the rotation
of the latch is suitably timed in relation to the
swing of the door so that latching is positive re
gardless of the degree of slam imparted to the
door. For example, the latch arm 54 is provided
with a projection 96 having a surface 98 inclined
at about 135° to the major axis of the latch bolt
52, in offset relation to the central axis of the
latch pin 36, and adapted to contact the vertical
face I06 of the lug 90 at the limit of counter
clockwise rotation of the latch 32, as illustrated in
Fig. 5. In slamming the door, when the rounded
end I02 of the latch bolt 52 strikes the forward
camming surface 80 of the catch, there is a rota
tion of the latch 32 at high velocity in a coun
tercloclrwise direction which causes the projection
96 to impact the lug 96 with suf?cient force to
effect an immediate return of the latch at high
3
2,383,032
approximately 45°, whereupon impact of the pro-'
velocity in a clockwise direction, the force due to
gravity being supplemented to such an extent that.
the latch bolt 52 will have been rotated to a level
above the tip 68 of the catch, at a position rear.
jection 96’ with the lug 90' causes immediate re~
versal of the latch rotationwith sufficient energy
to snap the latch into one or the other of the
wardly of the tip, before the door can move any
appreciable distance away from the frame 12.
latching positions before the recoil of the door
occurs, the angularity of clockwise rotation be
ing about 10° to 15° to throw the bolt 52’ into the
recess 88’ for “safety” latching, or approximately
45° for contact with surface 84' with the door sub
The door 10 is thus automatically locked against
outward movement by the bolt 52 coming to rest
against either the lower latching surface 82 or
the upper latching surface 84. The usual posi 10 stantially closed and seated against packing 28.
tion of rest is the ?rst or “safety” latched posi
The invention as herein disclosed in accordance
tion, as shown in Fig. 6, where the rounded end
with the provisions of the statutes will be under
I04 of the latch bolt is received within the recess
stood by persons skilled in the art to be applicable
88 of the catch, and retained therein by the..over=
in arrangements other than those speci?cally de
balancing movement of the Weighted lever arm
scribed, and to include features which may be
54, in which position the door is spaced only a
used to advantage without a corresponding use
slight distance from its seat and may thereafter,
- of other features, within the scope of the appended
at the convenience of the operator, be fully closed
claims.
and sealed by a downward pressure .011 the han
dle 56. In the “safety” position the door is posi
I claim:
20
'
tively locked against opening even by application
l. A latching mechanism for use with relative
ly movable parts, one of which constitutes a hori
of a pry bar between the door and frame, although
by a lift of the latch handle 56 the latch is easily
zontally swinging door and the other a station
disengaged for opening the door.
ary frame for said door, said mechanism com
prising a latch rotatable about a, horizontal axis
?xed in relation to one of said parts, said latch
The impact surface I 00 of the lug 90 is con
veniently planar and substantially vertical so
having an integral bolt portion extending parallel
that, for the form shown, the ‘latch moves through.
to said axis for cooperation with a catch ?xed in
an angle slightly greater than 45° from its pre
relation to the other of said parts, said catch
determined position of rest with the door open
having successive upright latching surfaces
as in Fig. 4 to the‘ position in which the projece 80 adapted to be separately engaged. by said bolt
tion 96 strikes the impact lug 90 as in Fig. 5, the
portion for positively holding said door in any one
- angle of movement beyond 45° being due to the
slight inclination of the major axis of the bolt
52 to the horizontal when in the position of Fig.
of a plurality of latched positions against a force
tending to. swing said door in the opening direc
tion, said latching surfaces being in stepped rela
4. ' In the reverse direction, the angularity of 35 tion and forming a shouldered recess‘ therebe
travel need be only about 10° to 15° to return
the bolt 52 to the safety position indicated in
Fig. 6.
Figs. 7 and 8 show a latching mechanism sim
ilar to that already described but with modi?ca
tions particularly applicable to doors of smaller
size and weight. Parts of essentially the same
form and function are designated by the same
reference characters as in Figs. 1-6, except with
primes, in order to facilitate comparison.
tween at a level below said axis, said latch being
adapted for arrangement relative to said catch
whereby application of a force to said latch to ro
tate said latch solely in one direction will cause
said bolt portion to be moved from engagement
with the lower of said latching surfaces within
said recess into engagement with said latching
surface ‘above said recess while causing said door
to be swung from a, partially closed to its fully
The 45 closed position, said bolt portion being of rhomb
door I0’ is swung relatively to the frame ‘2' to
shaped cross section with respect to a major axis
open and close the aperture 22’, the door being
substantially in the plane of said rotational axis
sealed to the frame when fully closed by packing
for engagement with each of said latching sur
28’. Catch 34' is carried by the frame 12', and
faces at one end of said major axis.
provides for a plurality of latching positions as 50
2. A latching mechanism for use with a hori
in the previously described embodiment, with re
zontally swinging door and its stationary frame,
cess 88’ adjacent the vertical surface 82’ for hold
said mechanism comprising a latch rotatable
ing the bolt 52’ in a “safety” latching position,
about a horizontal axis ?xed in relation to said
and with the steeply inclined surface 84' for hold
door parallel to its radius of swing, said latch
ing the bolt in the ?nal latching position.
55 having an integral bolt portion extending par
The principal distinguishing feature of this
allel to said axis for cooperation with a catch
arrangement is the form of latch H36 which pro
?xed in relation to said, frame, said catch having
vides a unitary handle portion I08 extending
successive upright latching surfaces adapted to
downwardly at approximately 135° from the ma
be separately engaged by said bolt portion for
jor axis of the latch bolt 52', the projection 96’ 60 positively holding said door in any one of a plu
having its impact surface 98’ inclined upwardly
‘ rality of latched positions against a force tending
at approximately the same angle from the same
axis. The handle is provided with a hole I I 0 ad
jacent its end to permit the use of a hooked tool
for convenience in manipulating the latch, while
a triangular rib I I2 projecting laterally from one
side provides additional strength and suitable
distribution of weight for satisfactory operation.
The latch I06 may be mounted for pivotal oscil
lation on a latch pin H4 which is pinned within
the bearing bracket 46' and ?tted with a cotter
pin H6 to prevent lateral displacement of the
latch. In this form also, when the bolt 52' strikes
the camming surface 85', the latch is suddenly
rotated in a counterclockwise direction through
to swing said door in the opening direction, said
latching surfaces being in stepped relation and
forming a shouldered recess therebetween at a
level below said axis, said latch being adapted for
arrangement relative to said catch whereby ap
plication of a force to said latch to rotate said
latch solely in one direction will cause said bolt
portion to be moved from engagement with the
lower of said latching surfaces within said recess
into engagement with said latching surface above
said recess while causing said door to be swung
from a partially closed to its fully closed position,
said bolt portion being of rhomb-shaped cross
section with respect to a major axis substantially
4
2,383,032
'in the plane of said rotational axis for engage
ment with each of said latching surfaces at one
end of said major axis.
tially horizontal to enable said latch bolt to en
gage a forwardly facing camming surface of said
catch adjacent one end of said major axis, and a
3. A latching mechanism, for a horizontally
second abutment means angularly displaced from
swinging furnace door, adapted for positive latch
ing operation when the door is slammed into its
said ?rst named means for abruptly interrupting
rotational movement of said latch resulting from
forcible engagement of said latch bolt with said
camming surface when the door is slammed, said
closed position, said mechanism comprising a le
ver form of latch adapted for mounting on said
second abutment means functioning as an impact
door for rotation about a horizontal axis, one end
of said latch having a latch bolt of elliptical cross 10 means supplementing gravitational forces for ef
section projecting therefrom in parallel relation
fecting réverse rotation of said latch at su?icient
to said rotational axis for cooperation with a sta
velocity to cause said latch bolt to become seated
tionary catch, the major axis of said cross section
within said shouldered recess adjacent the oppo
lying substantially in the plane of said rotational
axis, the opposite end of said latch being con
site end of said major axis substantially before
15 recoil of the door takes place.
structed and arranged to act as a counterweight
tending to rotate said latch to a position, where
said latch bolt is above the level of said rota
tional axis, a stop on said door operative during
the initial closing movement of said door for 20
maintaining said major axis substantially hori
5. A door latch of the gravity-actuated lever
form type rotatable about a horizontal axis and
adapted for positive latching operation when the
door is slammed into its closed position, one end
of said latch having a latch bolt projecting there
from in parallel relation to said rotational axis
wardly facing camming surface of said catch ad
for cooperation successively with upwardly di
verging camming and latching surfaces of a sta
jacent one end of said major axis, and means on
tionary catch, said latch bolt being cross-section
zontal to enable said latch bolt to engage a for
said door angularly displaced from said stop for
ally shaped substantially as a rhomb having
abruptly interrupting rotational movement of said
rounded portions at opposite ends of its major
latch resulting from forcible engagement of said
axis, with said major axis substantially in a plane
bolt with said camming surface when said door
with said rotational axis and of a length one-and
is slammed, said means presenting a surface po
one-half to two times the length of the minor
sitioned for impact by said counterweight end 30 axis, the opposite end of said latch being con
for effecting reverse rotation of said latch at suf
stmcted and arranged to act as a counterweight
?cient velocity to cause said latch bolt to oper
tending to rotate said' latch to a position where
atively engage a rearwardly facing latching sur
said major axis is inclined upwardly from said
face of said catch adjacent the opposite end of
rotational axis, said catch surfaces including
said major axis in time to substantially prevent as rearwardly facing upright upper and lower latch
opening movement of said door due to recoil.
ing surfaces horizontally o?set to form a shoul
4. A door latch of the gravity-actuated lever
dered recess therebetween at a level below said
form type rotatable about a horizontal axis and
rotational axis, an abutment means operative
adapted for positive latching operation when the
during the initial closing movement of the door
door is slammed‘ into its closed position, one end for opposing said counterweight action whereby
of said latch having a latch bolt of elliptical cross
said major axis is maintained substantially hori
section projecting therefrom in parallel relation
zontal to enable said latch bolt to engage a for
to said rotational axis for cooperation successively
wardly facing camming surface of said catch ad
with upwardly diverging camming and latching
jacent one end of said major axis, and a second
surfaces of a stationary catch, the major axis of . abutment means angularly displaced from said
said cross section lying substantially in the plane
?rst named means for abruptly interrupting ro
of said rotational axis, the opposite end of said
tational movement of said latch resulting from
latch being constructed and arranged to act as
forcible engagement of said latch bolt with said
a counterweight tending to rotate said latch to
camming surface when the door is slammed, said
a position where said major axis is inclined up- -
second abutment means functioning as in im
wardly from said rotational axis, said catch sur
pact means supplementing gravitational forces for
effecting reverse rotation of said latch at suffi
cient velocity to cause said latch bolt to become
faces including rearwardly facing upright upper
and lower latching surfaces horizontally offset to
form a shouldered recess therebetween at a level
below said rotational axis, an abutment means
operative during the initial closing movement of
the door for opposing said counterweight action
whereby said major axis ‘is maintained substan
seated within said shouldered recess adjacent the
"- opposite end of said major axis substantially be
fore recoil of the door takes place.
JOHN ABERNETHY.
Документ
Категория
Без категории
Просмотров
0
Размер файла
777 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа