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Патент USA US3086490

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April 23, 1963
H. HIMMELBERGER ETAL
'
RESTRAINING LATCH
Filed May 21, 1962
3,086,481
'
2 Sheets-Sheet 1
FIG‘. 1
FIG‘. 2
4
F242
Ll
42
INVENTOR
Harold Himme/berger
Donald K. Adrian
>BY
W
ATTORNE Y
April 23, 1963
H. HIMMELBERGER ETAL
3,086,481
RESTRAINING LATCH
Filed May 21, 1962
2 Sheets-Sheet 2
United States Patent 0
C@
3,086,4'8 1'
Patented Apr. 23, 1963
1
2
3,086,481
of the missile which might otherwise result in injury and
damage to personnel ‘and material in the adjacent work
RESTRAINING LATCH
Harold Himmelberger, Silver Spring, and Donald K.
Adrian, Damascus, Md., assignors to the United States
of America as represented by the Secretary of the Navy
Filed May 21, 1962, Ser. No. 196,536
10 Claims. (Cl. 104-250)
areas.
The restraining latch device 4 comprises a housing or
support 11 of any desirable and practical shape to facili
tate attachment to the test stand. The housing is pro
vided with a bore 12 therethrough in which ‘a latch stop
or locking bolt 13 is reciprocable from ‘an operative latch
This invention relates to a latch and more particularly
ing position protruding from the housing as in FIG. 3,
to a restraining latch for restraining a missile in the event 10 to an inoperative unlatched position shown in FIG. 4.
of accidental ignition, one object of the present invention
being the provision of a more useful device of this nature.
The invention is admirably adapted for restraining a
missile during depot check-out of the missile components,
but is of course applicable for numerous other uses.
Many of the devices heretofore used as restraining
The upper surface of housing 11 is covered by a plate
14 ?rmly attached to the housing by screws 16 and pro
vided with a bore 17 generally concentric with bore 12
of the housing 11 and through which the upper portion
15 15 of bolt 13 protrudes.
latches, for one purpose or another, comprise cam actu
ation or detent locking means. However, these devices
Bolt 13 is a two-diameter shaft
having its lower portion 10‘ slidably ?tting in the housing
bore 12 and the upper portion 15 of a reduced diameter
slidably ?tting bore 17 of cover plate 14 and de?ning,
failed to satisfy the present missile restraint requirements
a shoulder '18. A coiled compression
of dependability, simplicity and visual assurance of oper 20 therebetween,
spring 19 surrounds the bolt in the space de?ned by hous
ation. ‘Therefore, other objects of this invention are the
ing bore 12, the bolt upper portion 15, cover plate 14 ‘and
provisions of a restraining latch which is very simple in
shoulder 18? and acts against shoulder 18 to normally
construction, assembly, servicing, repair ‘and operation.
urge the bolt to its operative latching position as shown
A further object of
invention is the provision of
in FIG. 1.
a restraining latch of such rugged construction as to be 25
failure-proof in the event of missile ignition during check
out when the missile is being retained on a test stand.
A knob 21 is secured to the top of bolt 13- by means
of threads 22 and 23 on said bolt and knob respectively,
and is preferably knurled to facilitate manual grasping
Another object of this invention is the provision of a
for li?ting bolt 13, against the bias of spring 19, to the
restraining latch having a visual indicator depicting the
inoperative position shown in FIG. 4. A spacing sleeve
extent of latch operation.
30
24 is positioned around bolt 13 between plate 14 and
A still further object of this invention is the provision
knob 21 thereby limiting the extent of protrusion of bolt
of a restraining latch having a positive locking arrange
portion 10 below housing 11 in response to the urging of
ment, quickly and easily operable.
spring 19.
Various other objects and advantages will appear from
One side of the bolt lower portion 10‘ is provided with
the following description of one embodiment of the in 35
a surface 26 cammed in the direction of movement of
vention, and the novel features will be particularly pointed
missile lug 6 and facing the lug as it moves along rail 7
out hereinafter in connection with the appended claims.
toward latch 4. As lug 6 encounters surface 26, bolt 13
FIG. 1 is a side elevation view of a portion of the
is cammed upward into housing 11 as shown in FIG. 4..
missile and its supporting rail with portions broken away;
The
opposite side of the bolt lower portion is provided
FIG. 2 is a vertical sectional view taken substantially
with a latching surface 27 perpendicular to the direction
along the line 2-2 of FIG. 1;
of movement of lug 6 and adjacent to the lug when missile
FIG. 3 is a vertical sectional view of the retaining latch
5 is in test posiiton, this restraining the return movement
in latched condition taken substantially along the line
of missile lug 6. Proper alignment of bolt surfaces 26
3—-3 of FIG; 2;
FIG. 4 is a view similar to ‘FIG. 3 showing the latch 45 and 27 relative to housing 11 is assured by the provision
of a groove 28 along the periphery of upper portion 15
in unlatched condition, and
and extending from the top of bolt 13 to a point adjacent
FIG. 5 is a transverse section taken substantially along
shoulder 18 in the direction of reciprocal movement of
the line 5—5 of FIG. 3.‘
the bolt. Plate ‘14 is provided with a protrusion 29 which
A restraining latch embodying this invention, herein
disclosed ‘by way of illustration, comprises a cammed 50 extends into groove 28 thereby preventing rotary motion
latch having a plunger which acts as a combination indi
cator-release mechanism to give positive visual assurance
of latch engagement and to provide for a one step latch
release operation which leaves the latch positioned to re
ceive the next missile lug. However, it is to be under 55
stood that while this invention is herein described as a
missile lug restraining latch for use on a depot missile
test stand, the scope thereof is not limited to missiles,
but may, by slight modi?cation be adapted for perform
ing other latching functions, such as on hatches, con
of ‘bolt 13 relative to housing 11 as best shown in FIGS.
3 and 5. It should be noted that groove 28‘ need extend
along the length of portion 15 only far enough to permit
bolt '13 to retract into housing 11 as shown in FIGURE 4.
Bolt 13 is additionally provided with an axial bore 31
extending from the top ‘of the bolt through upper portion
15, having its axis parallel to the line of motion of bolt
.13 and terminating in a shoulder 32. A second bore 33,
of smaller diameter than, but concentric with bore 31,
extends trom shoulder 32 into lower portion 10 of the
bolt. Knob 21 also has a bore therethrough concentric
with but of smaller diameter than bore 31 and, when
threaded on the bolt, de?nes a shoulder 38 with bore 31.
Bolt 13 is further provided with a transverse bore 34 in
to a missile support rail 7 of a missile test stand (no-t 65 lower portion 10 which communicates with both bore 33‘
shown). The missile 5, to be tested, is supported on rail
and the periphery of the bolt. Transverse bore 34 also
7 by one or more lugs 6 and is moved from the left in
communicates with a recess 36, provided in housing 11,
the direction of the arrow to a correct position for testing
when the bolt is in a normally extended operative posi
, such that the lug 6 passes by the latch device 4 and is
tion, as shown in FIGURE 3.
‘prevented ~from return motion to the left by latch stop 70
Carried in bores 31, 33 and '37 of the device is an in
‘'13. Thus in the ‘event of accidental ignition of the
dicating-locking member 41 in the form of a plunger hav
'n'iissile, stop 13. of latch device 4 restrains movement
ing a top indicating section 42 slidable in bore 37 and
veyors, and the like.
-
Referring to the drawings and more particularly to
FIGS. 1 and 2, the restraining latch device 4 is secured
3,086,481
a
(it
normally protruding therefrom, and an intermediate sec
tion 43 and bottom locking section 44 slidably ?tting in
bore 33. A collar 46 is located between top and inter
mediate sections 42 and 43, respectively, slidably ?tting
and reciprocatable ‘within bore 31, limited in extent of
movement by shoulders 32 and 38. A coiled compres
sion spring 47 is telescoped around intermediate section
43 and acts between shoulder 32 and collar 46 to urge
collar 46 toward shoulder 38 thereby causing the indicat
ing section 42 to normally protrude from knob bore 317
as shown in FIGURE 3.
A reduced diameter portion 48 is located between in
termediate section 43 and locking section 44 thereby de
?ning an annular recess 51 therebetween for purposes
discussed hereinafter. The interface 49 between the re
duced diameter portion 48 and locking section 44 is in
the form of a tapered or chamfered cam surface.
It
should be noted that when indicating section 42 is pro
truding above knob 21 and collar 46 is in abutment with
shoulder 38, locking section 44 is positioned in alignment
with transverse bore 34 as best seen in FIG. 3.
Alter
natively, when plunger 41 is retracted into bolt 13 such
that indicating section 42 is ?ush with knob 21, recess 51
is in alignment with transverse bore 34 as best seen in
FIG. 4.
Bolt locking relative to the housing is accomplished
by the provision of a locking detent 55 slidably carried in
transverse bore 34 and having both ends of a rounded con
?guration as at 52 and 53. Detent 55 is of longer length
than bore 34 such that when either end of the detent is
?ush with an adjacent end of bore 34, the opposite rounded
end of the detent protrudes from the other end of the
bore. Thus, as may be readily seen in FIG. 3, when de
tent surface 52 is in abutment with plunger locking por
tion 44, detent end 53 protrudes into housing recess 36.
Alternatively, when detent end 53 is in abutment with the
surface of bore 12, detent end 52 extends into recess 51
d
recess 36, locking the detent therein by the alignment of
locking section 44 with the transverse bore. Indicating
section 42 again protrudes above the knob to visibly in
dicate the latched condition of the bolt.
To release missile lug 6 from its position in abutment
with bolt latch face 27, plunger 41 is manually depressed
while, simultaneously, knob 21 is grasped and lifted up
ward. The detent is cammed from engagement in recess
36 into recess v51 as the bolt is lifted, again assuming the
10 condition shown in FIG. 4 with indicating section 42
flush with the knob. The missile with its lug 6 may now
be returned from the test position along the rail past latch
device 4 and upon release, the bolt, plunger and detent
return to the latched condition of FIG. 3 ready to receive
the next missile lug.
As may be readily ascertained hereinabove, the oper
ator may easily make a visual determination of the bolt
position without resorting to inspection of ‘the bolt latch
ing surface which is located in a virtually hidden position
within the missile rail.
It will thus be seen that the invention accomplishes its
objects and while it has herein been disclosed by reference
to the details of a speci?c embodiment, it is understood
that such disclosure is intended in an illustrative, rather
25 than limited sense, as it is contemplated that various
modi?cations in the construction and arrangement of the
parts will readily occur to those skilled in the art, within
the spirit of the invention and the scope of the appended
claims.
What is claimed is:
30
1. A latch for holding a member having a path of
as shown in. FIG. 4.
In operation, the cycle of movements may be most
logically described by assuming the bolt to be in extended
operative condition, as shown in FIG. 3, however, with
out the presence of a missile in test position. In this ori~
entation, bolt 13 is urged to the operative position by
spring 19 thus presenting cam face 26 and latch face 27
below the housing. Plunger 4-1 is urged to its uppermost
position by spring 47 thus positioning locking portion 44
in alignment with the transverse bore 34 and detent 55
and detent end 53 is lodged in recess 36 thereby locking
the bolt relative to the housing. It should be speci?cally
noted that the plunger indicating section 42 extends above
knob 21 thus giving visual assurance of the locked con
dition of the bolt. As a missile is moved along the test
stand rail toward the latch device, missile lug 6 encoun
ters bolt cam surface 26. Plunger 41 may now be manu'
ally depressed against the action of spring 47 by pushing
movement in one of two possible directions which com
prises a support relative to which said member moves, a
locking element carried by said support for movement
into and out of the path of relative movement of said
member, means biasing said element into said path, said
locking element carrying an indicating member movable
in a direction parallel to the direction of movement of
said locking element, bias means for urging said indicat
ing member in the same direction as said locking element
moves when moving out of the path of said member,
means carried by said locking element and interacting
with said support and indicating member for holding said
indicating member when said indicating member is moved
in a direction opposed to that of said locking element
when the latter moves out of the path of said member
whereby said indicating member protrudes from said
locking element when said locking element is in the path
of said member and the indicating member is contained
within said locking element when said locking element is
out of the path of said member.
2. The device as set forth in claim 1 further comprising
knob means attached to said locking element and exterior
to said support for manually moving said locking element
out of the path of said member.
and into recess 51, as shown in FIG. 4. It should now be
3. The device as set forth in claim 1 wherein said in
dicating member has cam surfaces, said means carried
by said locking element being a detent having a cam sur
face complementary to and engageable with one of those
on said indicating member, said support having a recess
noted that indicating section 42 is ?ush with the top of
knob 21 thus giving a visual indication that bolt 13 is in
an inoperative, unlatched condition. It should be further
from a ?rst position in engagement with said recess to
down on the indicating section thus positioning recess 51
in alignment with the transverse bore and detent. Fur
ther movement of missile lug 6 cams bolt 13 upward and
similarly causes detent 55 to be cammed out of recess 36
noted that manual pressure on the plunger need be main
tained only long enough for detent cam face 52 to engage
plunger cam surface 49. Detent surface 52 cooperates
with plunger surface 49 to cam the plunger to the lower
engageable by said ‘detent when said locking element is
in the path of said member, said detent being movable
a second position in engagement with said indicating
member cam surface whereby said detent is in said second
position when said locking element is out of the path of
said member.
4. A latch device comprising a housing having an open
ing therethrough, means in said opening having on one
70 end a latching surface, said means being movable in said
unlatched condition.
opening from a ?rst position wherein said latching sur
As lug 6 moves past the bolt, spring 19 urges the bolt
face is entirely within said housing to a second position
to its extended latched position. Recess 36 is again in
wherein said latching surface extends outwardly from
alignment with the transverse bore 34 and detent 55, and
said housing, said means having a bore, a plunger mount
plunger 41 in response to the urging of spring 47 moves
ed in said bore having one end normally extending out
upward relative to the bolt, thus camming the detent into
position, shown in FIG. 4, and to hold the plunger in
this position relative to the bolt so long as the bolt is in an
5
3,086,481
of said bore, said plunger ‘being movable relative to said
means in response to movements of'said means whereby
6
transverse bore, whereby when said plunger is normally
extending out of said bore said detent protrudes into said
said plunger is contained entirely within said bore when
said means is in said ?rst position thereby indicating that
said means is in said position.
5. The device set forth in claim 4 additionally compris
ing ?rst bias means in said opening for urging said means
recess thereby indicating said means is in said second po
sition.
8. The device as set forth in claim 7 wherein at least
one end of said recess and adjacent end of said detent
to said second position, and second bias means in said
adjacent said reduced diameter portion and said other end
are cam surfaces, and at least one end of said plunger
bore for urging said plunger out of said bore.
of said detent are cam surfaces, whereby movement of
6. The device set forth in claim 5 further comprising 10 said plunger toward said normally extended position cams
the longitudinal axis of said bore being parallel to that
said detent into said recess, and subsequent relative move—
of said housing opening, said means having a transverse
ment of said housing and means cams said detent out of
bore connecting said ‘bore and opening and extending in
said recess.
a direction generally perpendicular to said bore and open
9. ‘The device as set ‘forth in claim 8 wherein the sur
ing, said housing having a recess adjacent to and in 15 face of said plunger adjacent said detent is an abutment
alignment with said transverse bore when said means is
preventing movement of said detent into engagement with
in said second position, detent means carried in said
said reduced diameter portion when said plunger is in said
transverse bore, said plunger having a portion of reduced
normally extended position whereby said detent is held in
diameter intermediate the ends thereof, said reduced di
said recess thereby locking said means in said second
ameter portion being alignable with said transverse bore, 20 position.
and said distance between said reduced diameter portion
10. The device as set forth in claim 9‘ wherein said
and said recess when the same are in alignment with the
axis of said transverse bore being greater than the length
abutment surface on said plunger is movable out of
engagement with said detent when said plunger is moved
of said detent whereby said detent is movable from a
from said normal extended position against said bias
position projecting from one end of said transverse bore 25 means into said bore whereby said detent is movable
into said recess to a position projecting from the other
from engagement in said recess into engagement with
end of said transverse bore into contact with said re
duced diameter portion.
7. The device as set forth in claim ‘6 wherein said
reduced diameter portion is normally held out of align 30,
ment with said transverse bore by said second bias means,
and said detent means is of greater length than said
said reduced diameter portion thereby permitting said
means to move to said ?rst position.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,867,678
Rayburn ______________ __ July 19, 1932
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