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Патент USA US3087332

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April 30, 1963
c. A. HILLGREN
3,087,324
COMBINATION DEAD LOCK AND SPRING LATCH
Filed Aug. 8, 1960
3 Sheets-Sheet 1
I140, 11
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INVENTOR.
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April 30, 1963
c. A. HILLGREN
3,087,324
COMBINATION DEAD LOCK AND SPRING LATCH
Filed Aug. 8, 1960
5 Sheets-Sheet 2
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April 30, 1963
c. A. HILLGREN
3,087,324
COMBINATION DEAD LOCK AND SPRING LATCH
Filed Aug. 8, 1960
I
3 Sheets-Sheet 3
6491. A7. A04 L GQEN
IN VEN TOR.
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Patented Apr. 30, 1953
2
FIGURE 1 but showing the parts in a different position
3,087,324
COMBINATION DEAD LOCK AND SPRING LATCH
Carl A. Hillgren, 351 E. Bay Front, Ealhoa Island, Calif.
Filed Aug. 8, 1960, Ser. No. 48,098
4 Claims. (Cl. 70-447)
of adjustment.
FIGURE 6 is a fragmentary cross~sectional view taken
on the line 6—6 of FIGURE 1.
FIGURE 7 is a fragmentary cross-sectional View taken
on the line 7—-7 of FIGURE 5.
FIGURE 8 is a cross-sectional view taken on the line
8—8 of FIGURE 1.
The invention hereinafter disclosed has reference to
door locks and especially door locks usable for outside
FIGURE 9 is an exploded view in perspective showing
doors. Of special importance in the. invention is a struc
tural expedient by means ‘of which the door lock can be 10 the various parts of the device.
blocked against manipulation from the outside knob by
FIGURE 10 is a cross-sectional view taken on the line
10-10 of FIGURE 9.
adjustment of a device extending into the lock from the
To explain the invention one particular embodiment has
inside knob.
been selected as shown in the drawings as being repre
In many types of door locks including those which
can be opened by means of a key through the outside knob 15 sentative of the invention herein involved.
The lock in general consists of a spindle housing It),
there is provided some handy manual means for locking
the general form ‘of which can best be viewed in FIGURE
the door from the. inside against opening from the out~
9 in which a latch bolt housing 11 is adapted to engage.
side by use of the conventional knob unless the person is
An outside knob 12 to which an outside spindle is affixed
provided with a key. Some of these have been termed
“privacy locks” and others have been termed “night locks.” 20 is rotatably received in the latch bolt casing. On the op
posite side an inside knob 14 to which an inside spindle
These devices have, for the most part, been acceptable in
I5 is a?ixed mounts upon the opposite side of the spindle
their performance when locks are applied to doors in sta
housing with the inside spindle in cooperative relationship
tionary structures.
with the latch bolt casing.
Locks of this kind, however, are also used on house
An escutcheon 16 on the outside, which in the chosen
trailers, for example, as well as on boats and other vehi 25
embodiment is part of the spindle housing bears against
cles. When used in this way they are subjected to bump
:an outside face 17 and is adapted to be drawn against the
ing and vibration as the vehicle is moved about. When
face of the door by employment of suitable screws 19
this happens to a lock that has been locked it is quite pos
shown in section in FIGURES 2, 3 and 4 which are re
sible to cause the lock to become unlocked during travel
and hence the lock is not secure neither during travel nor 30 ceived in appropriate threaded bosses 20 of the spindle
housing. The screws pass through appropriate apertures
when the vehicle subsequently stops.
in an inside escutcheon 21 which is drawn thereby against
To remedy the objection noted, one of the objects of
a new and improved night locking or privacy locking
an inside face 22 of the door 18. An outside decorative
rosette 23‘ is snapped in place over the outside escutcheon
which the lock is mounted is subjected to excessive bump
ing, vibration and twisting.
side escutcheon.
In this type of lock the basic structure of which is
the present invention is to provide a lock which includes
mechanism which remains secure even though a door on 35 and an inside rosette 2,4 is snapped in place over the in
Another object also is to provide in a door lock a new
and improved dead lock mechanism which can positively
bar the latch bolt from movement to an unlocked position
irrespective of vibration bumping or manipulation or by
raking or manipulation by unauthorized persons.
already well-known the latch bolt casing mounts a re
ciprocating latch bolt 25 which is moved by an actuator
26 in a manner already well-known by reverse acting
means (not shown) so that as the actuator moves from
right to left as viewed ‘in FIGURES 1, 2, 3 and 4 the
latch bolt is withdrawn from an appropriate hole 27
Another object is to provide a door lock which also is
equipped with a simple privacy latching mechanism sub 45 in a door jamb 28'. Both of the spindles are so mounted
that they can manipulate the actuator. The outside
ject to push-button operation which can be readily un
latched by merely rotating the inside knob, thereby to pro
vide a panic-proof lock.
An object of the invention is to provide also in a latch
construction a combination securing means which serves
both as a dead bolt and a night latch thereby providing
double security which can be unlocked only by use of-a
key from the outside or by manipulation of the special
mechanism on the inside.
In addition to the objects expressly set forth the inven
tion comprehends those variations in structure and ar
rangement which still fall within the essence of the inven
tion as set forth in the speci?cation and claims.
spindle 13 for example, keyed by appropriate conven
tional means (not shown) to the outside knob 12 is
arcuate in shape as revealed in FIGURES 2., 3 and 4 and
upon rotation one end or the other will be pressed against
one of the feet 29 of the actuator to push the actuator
from right to left thereby to withdraw the latch bolt 25.
vA complementary arcuate recess 30 permits rotation of
the arcuate outside spindle. The inside spindle 15 is also
55 arcuate in form and of a radius concentric with the radius
of the outside spindle 13. When the inside spindle is
rotated, as for example by rotation to the position shown
in FIGURE 4 one end or the other will bear against
one of the feet 29 and reciprocate the latch bolt in a fash~
ion similar to that described for the outside spindle. It
FIGURE 1 is ‘a longitudinal sectional view of a door 60
will be understood that the inside spindle is keyed by
lock incorporating the invention mounted in a door.
means (not shown) through a sleeve 31 to the inside
FIGURE 2 is a cross-sectional view taken on the line
knob 14. Thus, as long as the door remains unlocked
2—~2 of FIGURE 1.
FIGURE 3 is a fragmentary cross-sectional view similar 65 either of the knobs can be rotated to withdraw the latch
bolt and thereby open the door.
to the main portion of FIGURE 2 but showing the device
In addition to the conventional latch bolt 25 and its
In the drawings:
in a second position of adjustment.
FIGURE 4 is a foreshortened cross-sectional view
similar to FIGURE 2 showing the adjustment of FIGURE
appropriate operating parts the latch bolt is provided with
a dead bolt pin 35 of predetermined length ?xed to the
latch bolt so that when the latch bolt reciprocates the
2 but under conditions wherein the latch bolt is being 70
dead bolt pin will also reciprocate. The end of the dead
manipulated to retract it.
bolt pin opposite from that attached to the latch bolt
FIGURE 5 is a longitudinal sectional view similar to
8,087,324
3
4
slides through an appropriate hole 36 in a plug 37 which
of the blocking shaft. In addition to being rotatably
contained within the inside spindle 15 the blocking shaft
is also held centrally and rotatably in position by pro‘
'
is part of the latch bolt casing.
In order to make use of the dead bolt pin and thereby
bar the latch bolt from retraction there is provided a
blocking shaft 46‘ which extends through the inside knob
jection of a cylindrical boss 55 into an appropriate aper
ture 56 of an end portion 57 of the shaft. The boss, as
shown in FIGURE 9, forms a part of the key actuated
spindle 51. The spring 58 acting between the end face
- of the key actuated spindle 51 and the flange 47 tends
normally to urge the blocking shaft toward the inside
14. The blocking shaft is rotatably mounted by virtue
of a slightly enlarged outer end within the inside spindle
15 so that it is snugly but rotatably contained therein. A
?nger hold 41 is provided on the exterior so that it can
be manipulated.
10
A reduced inner portion 42 of the blocking shaft 40
At its inner end there is provided in the blocking shaft
a rtransverse slot 43 which extends clear through the re
15 tend normally to urge the locking slide 60' in a direction
from left to right as viewed in FIGURES 5, 6 and 7.
The locking slide is provided with a detent 64 on the
side facing the outside knob 12. The detent is adapted
to enter into a pocket 65 formed by end edges 66 and
20 67 of the outside spindle 13. When the detent 64 is
positioned within the pocket 65 the outside spindle and
hence the outside knob is barred against rotation.
To make use of this feature of the device the blocking
shaft is provided at its outside end adjacent the ?ange
25 47 with a shoulder 68 and adjacent the shoulder a recess
69. When the shoulder 68 is placed beneath and sup
ports a trans-verse section 70 of the locking slide as shown
in FIGURE 1 the locking slide is held outwardly far
enough so that the detent 64 is removed from the pocket
30 65. Hence in this position the outside knob 12 can be
rotated in order to withdraw the latch bolt.
When the blocking shaft is pushed endwise by pres
sure against the inside end of the shaft far enough to
move the shoulder from a position beneath the transverse
35 section 70 the transverse section will fall into the recess
withdrawal of the latch bolt as a result of spindle actu
ation of either spindle.
To accomplish the dead bolting or dead locking effect,
the blocking shaft 40 is rotated from the position shown
in FIGURE 2 to the position shown in FIGURE 3. R0
tation 90 degrees as shown effects rotation of the trans
verse slot 43 so that it is no longer in alignment with the
dead bolt pin 35. Instead the surface of the reduced
'
In conjunction with the blocking shaft for this phase
of the operation there is provided a locking slide 60
which incorporates shoes 61 slidably received in appro
priate tracks 62 in the spindle housing 10'. Springs '63
extends inwardly into the interior of the spindle housing.
duced inner portion ‘42. The transverse slot 43 is of ample
dimensions so that it can receive the dead bolt pin 35
irrespective of where the latch bolt casing may be mounted
upon the spindle housing. The reason for making the
transverse slot elongated as shown arises from the fact
that when the latch bolt casing 11 is slid into a recess
44 in the spindle housing so that edges of the recess
engage notches 45 of the latch bolt casing the latch bolt
casing will he slid to a greater or lesser degree into the
recess depending upon the relative location of a bore
46 in the door relative to the inside and outside faces.
Hence the transverse slot 43 has to be long enough so
that it will be in alignment with the dead bolt pin 35
regardless of where the latch bolt casing is positioned.
In unlocked position of the door the transverse slot 43
will have the position and alignment illustrated in FIG
URES 2 and 4. When one or the other of the spindles
is rotated, as for example the inside spindle 15 as shown
in FIGURE 4, to withdraw the latch bolt 25 in the man
ner heretofore described, the dead bolt pin 35 will move
into the transverse slot 43v thereby to permit complete
knob 14.
69. This will permit a shift of the locking slide far
enough to have the detent 64 enter the pocket 65. When
this occurs the outside knob 12 and outside spindle 13
40 cannot be rotated and hence the door cannot be opened
from the outside.
In this position, however, the door can be opened from
the outside by use of the key 49. When the key is ro
tated, the key actuated mechanism 50 is rotated as pre
inner portion 42 of the blocking shaft lies adjacent the
viously described which causes the projection 52 to be
45
end of the dead bolt pin 35. Hence, when the blocking
rotated to approximately the position shown in FIGURE
shaft is rotated to this position by manipulation of the
6. From this position the projection 52 is forced against
?nger hold 41 from the inside of the door, the latch bolt
the transverse section 70 of the locking slide 60' through
25 cannot be withdrawn from engagement with the hole
out a distance suf?cient to lift the transverse section to
27 because the dead bolt =pin cannot move. Hence, neither
50 a position where it will clear the shoulder 68. When
the outside knob nor the inside knob can rotate to open
this happens the spring 58 pressing axially against the
the door.
To hold the blocking shaft releasably in this dead
bolting position there is provided on the end of the shaft
within the spindle housing a change 47 of somewhat
irregular shape presenting shoulders 48 and 48'. Em
?ange 47 and accordingly against the blocking shaft 40
moves the blocking shaft ‘far enough so that the shoulder
68 is moved to a location beneath the transverse section
55 70. In this position the detent 64 has been moved out
ployment of the shoulders makes possible locking and
unlocking the door from the outside by use of a conven
tional key 49 operating in a conventional key actuated
mechanism 50 to which is attached a key actuated spindle
of the pocket 65 and accordingly the outside spindle and
outside knob 12 are again free to be rotated whereby
through the agency already described the actuator can
be again manipulated to withdraw the latch bolt 25. It
will be understood that this same motion returns the
51. An inner projection 52 of the key actuated spindle 60 blocking shaft endwise to its original position so that it
is then ready for either of the operations heretofore de
the blocking shaft 40 thereby to rotate the shaft through
scribed, namely, that of dead locking the lock or that of
a distance of 90 degrees from the position shown in FIG
merely barring manipulation by the outside knob with
URES 3 and 5 back to the position of FIGURES 2 and
out dead locking.
4. This key actuated operation therefore relieves the 65
The shoulder 68 and also a second shoulder 68' at right
dead locking of the latch bolt so that the outside spindle
anglesto the shoulder 68, serve another purpose also,’
can unlock the latch bolt. By rotation in the opposite
namely, that of preventing accidental rotation of the
direction moving the projection 52 against the shoulder
blocking shaft from its selected position of rotation. For
48', the key can be used to dead lock the device from 70 example, if there be a slight rotation, the shaft will be
the outside.
returned to its initial setting by pressure of the springs
It is also possible to make use of the blocking shaft 46
62 acting against the locking slide and the transverse sec
when rotated is adapted to engage the shoulder 48 of
to bar retraction of the latch bolt 25 by use of the out
side knob without interposing the deadlocking feature.
This is accomplished by an endwise or axial movement 75
tion 70 to press against the shoulder shifting it so that.
the parts are ?at against each other.
‘Irrespectively of which locking manipulation is taken
3,087,324
advantage of the lock can be unlocked in the manner
already described by use of the key 49. From the de
scription therefore it is apparent that the blocking shaft
serves a double function namely, that of deadlocking the
look and that of merely blocking rotation of the outside
knob. This results in the ?rst instance in securing the
lock against any possible jarring loose of the locking ar
rangement or manipulation from the exterior. In the
6
locking engagement with the outside spindle, a shaft re
ciprocatably mounted in the inside spindle and the knob
thereon, a shoulder on said shaft adjacent the slide hav
ing a position in engagement with a portion of the slide
in a ?rst axial position whereby to withhold said slide
in a position of disengagement with said outside spindle,
means forming a recess on said shaft adjacent the shoul
der receptive of said portion of the slide when said shaft
is moved against spring pressure to a second axial posi
second instance where deadlocking is not needed the same
blocking shaft by quick pressure inwardly against the in 10 tion of the shaft whereby to enable movement of said
slide to a position of engagement with the outside spindle
side end can merely block manipulation of the latch bolt
and block rotation of said outside spindle, and a key
by the outside =knob. When in the last position the block
actuated spindle within the outside spindle engageable
ing is released not only by key actuation at the outside
upon rotation thereof with said slide whereby to enable
but also ‘by rotation of the inside knob 14 and accompany
unlocking from the outside at all times.
15
ing inside spindle 15. The edges of the arcuate portion
3. In a door lock comprising a spindle housing having
of the inside spindle 15 for this purpose not only are
forced against the feet 29 of the actuator 26 but also are
moved against shoulders 71 of the locking slide a distance
sufficient to shift the locking slide until the shoulder 68
a longitudinal recess at one side, a latch bolt and a
latch bolt casing therefor in engagement with the hous
ing in said recess, a latch bolt actuator in the casing
extending into said housing, an inside knob and an inside
can be pushed beneath the transverse section 70‘ by ac 20 spindle thereon extending into said housing to a posi
tion of spring 58. When this has occurred the locking
tion of engagement with said actuator, an outside knob
slide is then in a position wherein the detent 64 is free
and an outside spindle thereon extending into the hous
of the pocket 65 and the outside knob 12 as well as the
ing to a position of engagement with (said actuator, the
inside knob 14 can be manipulated to withdraw the latch
combination of a locking slide having a transversely
bolt until one or the other of the locking operations is 25 movable reciprocatable mounting in said housing and a
again taken advantage of.
While the invention has herein been shown and de
scribed in what is conceived to be the most practical and
preferred embodiment, it is recognized that departures
may be made therefrom within the scope of the inven
tion, which is not to be limited to the details disclosed
herein but is to be accorded the full scope of the claims
so as to embrace any and all equivalent devices.
I claim:
1. In a door lock comprising a spindle housing having
a longitudinal recess at one side, a latch bolt and a latch
locking element on the slide, a complementary locking
element on the outside spindle and means normally urg~
ing said slide into a locking engagement with the outside
spindle, ‘a blocking shaft ro‘tatably and reciprocatably
mounted in the inside spindle and extending through the
respective knob, a dead bolt pin on said latch bolt, means
forming a transverse slot in said blocking shaft in align
ment with said dead bolt pin in a ?rst rotative position
35 of the shaft, said shaft having a second rotative position
blocking reciprocation of said dead bolt pin, retaining
means on said shaft adjacent the slide having positions
bolt casing therefor in engagement with the housing in
respectively in engagement with a portion of the slide in
said recess, and a latch bolt actuator in the casing ex
a ?rst axial position for both rotative positions of the
tending into said housing, an inside knob and an inside 40 shaft whereby to withhold said slide in a position of
spindle thereon extending into said housing to a posi
disengagement with said outside spindle, a second means
tion of engagement with said actuator, an outside knob
operative in said ?rst rotative position having a position
and an outside spindle thereon extending into the housing
relative to the ‘slide when said shaft is moved to a second
to ‘a position of engagement with said actuator, a locking
axial position of the shaft whereby to enable movement
slide having a transversely movable reciprocatable mount
45 of said slide to a position of engagement with the outside
ing in said housing and a locking element on the slide,
spindle and block rotation of said outside spindle.
a complementary locking element on the outside spindle
4. In a door lock comprising a spindle housing having
and resilient means normally urging said slide into a lock
a longitudinal recess at one side, a latch bolt and a latch
ing engagement with the outside spindle, a shaft re
bolt casing therefor in engagement with the housing in
ciprocatably mounted in the inside spindle and the knob 50 said recess, a latch ‘bolt actuator in the casing extending
thereon, means on said shaft adjacent the slide having an
into said housing, an inside knob and an inside spindle
engagement with a portion of the slide in a ?rst axial
thereon extending into said housing to a position of
position of the shaft whereby to withhold said slide in
engagement with said actuator, ‘an outside knob and an
a position of disengagement with said outside spindle,
outside spindle thereon extending into the housing to a
a second means on said shaft having an engagement 55 position of engagement with said actuator, the combina
with the slide when said shaft is moved to a second axial
tion of a locking slide having a transversely movable
position of the shaft whereby to enable movement of
reciprocal-table mounting in said housing and a locking
said slide to a position of engagement with the outside
detent on the slide, .a complementary locking pocket on
spindle and block rotation of said outside spindle, said
the outside spindle and resilient means normally urging
inside spindle having a portion thereof engageable upon 60 the detent on said slide into a locking engagement with
rotation with said slide whereby to enable unlocking by
the pocket in said outside spindle, a blocking shaft ro
rotation of the inside knob at all times.
tatably and reciprocatably mounted in the inside spindle
2. In a door lock comprising a spindle housing having
and extending through the inside knob, a dead bolt pin
a longitudinal recess at one side, a latch bolt and a
on said latch bolt, means forming a transverse slot in
latch bolt casing therefor in engagement with the housing 65 said blocking shaft in alignment with said dead bolt pin
in said recess, a latch bolt actuator in the casing ex
in a ?rst rotative position of the shaft, said shaft hav
ing a second rotative position blocking reciprocation of
spindle thereon extending into said housing to a position
said dead bolt pin, shoulders on said shaft adjacent the
of engagement with said actuator, an outside knob and
slide having positions respectively in engagement with a.
an outside spindle thereon extending into the housing to 70 portion of the slide in a ?rst axial position for both ro
a position of engagement with said actuator, a locking
tative positions of the shaft whereby to withhold said
slide in a position of disengagement with said outside
slide having a transversely movable reciprocatable mount
spindle, means forming a recess in the shaft adjacent the
ing in said housing and a locking element on the slide,
shoulder receptive of said portion of the slide in said ?rst
a complementary locking element on the outside spindle
and resilient means normally urging said slide into a 75 rotative position of the shaft and when said shaft is
tending into said housing, an inside knob and an inside
3,087,324
7
moved against spring pressure to a second axial position
8'
References Cited in the ?le of this patent
of .the shaft whereby to enable movement of said slide
UNITED STATES PATENTS
to a position of engagement with the outside spindle and
block rotation of said outside spindle, a key actuated
1’566’575
Best ---------------- -- Dec' 22’ 1925
spindle within the outside spindle engageable upon 10- 5
2,669,474
K§men -------------- -- Feb' 16’ 1954
tation thereof with said slide in all positions of the shaft
2,723,874
whereby to enable unlocking from the outside at all times.
2,803,957
H?lgren ------------- -- NOV- 15, 1955
George -------------- -- Aug- 27’ 1957
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