U.S. patent number 3,769,822 [Application Number 05/261,586] was granted by the patent office on 1973-11-06 for door lock.
This patent grant is currently assigned to General Lock Company. Invention is credited to Leon Yulkowski.
United States Patent |
3,769,822 |
Yulkowski |
November 6, 1973 |
DOOR LOCK
Abstract
In a door lock which has a casing, a face plate, a lock cylinder
with rotatable cam, a spring-biased retractible latch bolt, and
inner and outer manually rotatable hubs with the inner hub in
operative engagement with said latch bolt for retracting the same,
the improvement which includes a clutch pivoted upon the latch bolt
and normally spring-biased to a position disengaged from the outer
hub. An upper transmission bar is pivotally mounted within the
casing adapted for operative engagement with a lower transmission
bar pivoted within the casing with the latter in operative
engagement with the clutch. The upper transmission bar is normally
positioned in the path of rotation of the cylinder cam so that when
engaged thereby acting through the lower transmission bar and the
clutch is adapted to retract the latch bolt, and is also adapted to
rotate the clutch for operative engagement by the outer hub.
Inventors: |
Yulkowski; Leon (Pontiac,
MI) |
Assignee: |
General Lock Company (Pontiac,
MI)
|
Family
ID: |
22993963 |
Appl.
No.: |
05/261,586 |
Filed: |
June 12, 1972 |
Current U.S.
Class: |
70/107; 70/149;
70/486; 70/152 |
Current CPC
Class: |
E05B
59/00 (20130101); Y10T 70/5478 (20150401); E05B
55/12 (20130101); Y10T 70/5226 (20150401); Y10T
70/5513 (20150401); Y10T 70/5496 (20150401) |
Current International
Class: |
E05B
59/00 (20060101); E05b 059/00 (); E05b
055/00 () |
Field of
Search: |
;70/107,110,111,146,147,148,151 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Champion; Marvin A.
Assistant Examiner: Tremblday; Richard P.
Claims
I claim:
1. In a door lock having a casing, an apertured face plate, a lock
cylinder with rotatable cam, a spring-biased retractible latch bolt
guidably mounted on said casing and face plate, and opposed inner
and outer manually rotatable spring-biased hubs journalled within
and upon said casing, the inner hub being in operative engagement
with said latch bolt; the improvement comprising:
an S-shaped clutch within said casing pivotally mounted
intermediate its ends upon said latch bolt;
a spring anchored in the casing normally biasing said clutch
counter-clockwise to a position disengaged from said outer hub;
a lower transmission bar at its upper end pivoted within said
casing with its lower end in operative engagement with said
clutch;
and an upper transmission bar at its lower end pivoted within said
casing operatively engaging the lower transmission bar, with its
upper end normally positioned in the path of rotation of said cam
and when operatively engaged thereby, pivotally rotating the lower
transmission bar, in turn, operatively engaging said clutch,
adapted to retract said latch bolt.
2. In the door lock of claim 1, said clutch adapted to be thus
rotated clockwise into operative reactive engagement with said
outer hub, so that rotation of the outer hub is effective to
retract said latch bolt.
3. In the door lock of claim 1, a lock button pivoted upon and
within said casing having a manually operable front face within
said face plate, and an inwardly extending clutch support plate in
"unlocked position" supportably holding said clutch in a clockwise
rotated position so that said outer hub is adapted to operatively
engage said clutch to retract said latch bolt.
4. In the lock of claim 3, said lock button being manually pivoted
to a "locked position" with its support plate disengaged from said
clutch.
5. In the lock of claim 4, ball detent means on said lock button
registerable with said casing in "unlock" and "lock" positions.
6. In the door lock of claim 1, said clutch adapted to be rotated
clockwise; a horizontally disposed locking lever pivotally mounted
on said casing and normally spring-biased to a position blocking
retraction of said latch bolt when the door is closed; a lateral
pin on said locking lever; said clutch on such clockwise rotation
adapted to operatively engage said pin lifting said locking lever
to a non-blocking position.
7. In the door lock of claim 6, a horizontally disposed stop button
guidably mounted on said casing and normally biased outwardly of
said face plate and adapted for retraction on closing of the door;
cam on and depending from said stop button adapted on opening of
the door and forward movement of said stop button to operatively
engage said locking lever pin lifting said locking lever to a
non-blocking position, said stop button when retracted disengaging
said locking lever.
8. In the door lock of claim 6, a thumb-turn hub journalled upon
said casing and adapted for manual rotation from the door inside,
and a pin on said hub adapted on rotation thereof to engage and
rotate said clutch clockwise into engagement with the outer hub and
also so that one end thereof operatively engages said locking pin,
lifting said locking lever.
9. In the door lock of claim 1, a dead bolt slidably mounted on and
nested in said casing and adapted for projection through said face
plate and including a hub having a cam slot therethrough; a
thumb-turn hub journalled upon said casing adapted for manual
rotation from the door inside; a cam pin on said thumb-turn hub
operatively nested in said cam slot whereby rotation of the
thumb-turn hub in one direction advances said dead bolt, and in the
other direction retracts said dead bolt.
10. In the door lock of claim 9, said upper transmission bar being
pivotally mounted on said dead bolt hub; said lower transmission
bar being pivotally mounted on said thumb-turn hub; spaced cams on
said thumb-turn hub, said lock cylinder cam being normally
positioned between said thumb-turn hub cams adapted for
key-operated engagement with said cams selectively for advancing
and retracting said dead bolt; continued rotation of said cylinder
cam after retraction of said dead bolt bringing said cylinder cam
into operative engagement with said upper transmission bar rotating
the same, in turn, rotating the lower transmission bar engaging
said clutch and retracting said latch bolt.
11. In the lock of claim 10, said clutch adapted to be rotated
clockwise; a horizontally disposed locking lever pivotally mounted
on said casing and normally spring-biased to a position blocking
retraction of said latch bolt when the door is closed; a lateral
pin on said locking lever; said clutch on such clockwise rotation
adapted to operatively engage said pin, lifting said locking lever
to a non-blocking position.
12. In the door lock of claim 11, a horizontally disposed stop
button guidably mounted on said casing and normally biased
outwardly of said face plate and, adapted for retraction on closing
of the door; a cam on and depending from said stop button adapted
on opening of the door and forward movement of said stop button to
operatively engage said locking lever pin, lifting said locking
lever to a non-blocking position, said stop button when retracted
disengaging said locking lever.
13. In the door lock of claim 4, said latch bolt adapted to be
retracted so that with the lock button successively returned to
"unlocked position" its support plate is elevated to lie in the
path of and retainingly engage said clutch, holding said latch bolt
retracted.
Description
A lock button is pivotally mounted upon the casing and in unlocked
position, is pivoted so as to supportably engage the clutch in a
clockwise rotated position in operative engagement with the outer
hub, and in an unlocked position, permits the clutch to be normally
spring-biased to disengagement from the outer hub. A locking lever
is pivoted within the casing and normally spring-biased to a
position blocking retraction of the latch bolt and mounts a lateral
pin which upon clockwise rotation of the clutch, lifts the locking
lever to a non-blocking position.
Also included is a stop button normally biased outwardly but
retracted when the door is closed and which mounts a cam adapted to
supportably engage the locking lever when the door is open to
assume a non-blocking position with respect to the latch bolt but
which when retracted, is disengaged from said locking lever.
The thumb-turn hub within the casing and manually operated from
inside or outside the door may mount a pin whereby, upon rotation
of said hub rotates the clutch to a clockwise position and cams the
locking lever from latch bolt blocking position.
A dead bolt is slidably mounted on the casing and is adapted for
projection through the face plate and includes a hub having a cam
slot operatively engaged by pin on the thumbturn hub for projection
and retraction of said dead bolt. Spaced cams on the thumb-turn hub
are adapted to be engaged by the door lock cam upon activation
thereof from the exterior of the door for retraction of the dead
bolt and on successive rotation of said cam for engagement with the
upper and lower transmission bars and clutch for retracting the
latch bolt.
BACKGROUND OF THE INVENTION
The present invention is an improvement over the lever lock for
doors disclosed in my earlier issued U.S. Pat. No. 3,148,524 dated
Sept. 15, 1964.
There has long existed the need for an improved general purpose
door lock which may be adapted for schools, hotels or other
buildings or for residences or apartments and, wherein, the lock
may be normally maintained in a locked condition, but wherein, the
latch bolt may be retracted by a key-operated locking cam.
Heretofore, the conventional latch bolt may be manually retracted
by a flexible strip of plastic inserted between the armor plate and
the door jam.
It is an object of the present invention to provide an improved
locking lever which is normally spring-biased within the casing to
a position to block unauthorized retraction of the latch bolt but,
which under normal key-operated functioning of the lock will be
moved to a non-blocking position.
It is a further object to provide a stop button which is normally
spring-biased outwardly when the door is open and which retracts on
engagement with the door jam on door closing and which mounts a cam
which supports the locking lever out of blocking position when the
door is open and which disengages the locking lever when the door
is closed to permit the same to bias to latch bolt blocking
position.
It is another object to provide an improved dead bolt assembly and
associated key-operated lock cylinder cam whereby said cam is
adapted for effecting from the outside of the door projection and
retraction of the dead bolt and on further rotation of the cam is
adapted to effect manual retraction of the latch bolt.
It is another object to provide an improved door lock which may be
used for schools and, wherein, there is no requirement for a dead
bolt.
It is another object to provide an improved face plate mounting for
the lock casing by which said face plate may be positioned at an
angle for approximately 31/2.degree. more or less from the normal
in one direction and upon readjustment of the fastening assembly
would be adjusted at a complemental angle of approximately
31/2.degree. from the normal or upon the use of all fastening
mechanisms may be set for any intermediate angle within the range
of 7.degree. approximately.
These and other objects will be seen from the following
specification and claims in conjunction with the appended
drawings.
THE DRAWINGS
FIG. 1 is a side elevational view of the door lock with the cover
plate removed for clarity of illustration and with the locking
button shown placing the lock in unlocked condition.
FIG. 2 is a left end elevational view taken in the direction of the
arrows 2--2 of FIG. 1.
FIG. 3 is a right end elevational view taken in the direction of
arrows 3--3 of FIG. 1.
FIG. 4 is a view similar to FIG. 1 but with the dead bolt omitted.
The lock button normally omitted with no dead bolt is shown in
dotted lines merely to show its locked position relative to FIG.
1.
FIG. 5 is a left end elevational view taken in the direction of
arrows 5--5 of FIG. 4.
FIG. 6 is a fragmentary plan section taken in the direction of
arrows 6--6 of FIG. 5.
FIG. 7 is a vertical section of the door lock taken in the
direction of arrows 7--7 of FIG. 1.
FIG. 8 is a fragmentary section taken in the direction of arrows
8--8 of FIG. 1.
FIG. 9 is a section taken in the direction of arrows 9--9 of FIG. 1
showing the mounting of the upper transmission bar.
FIG. 10 is a plan section taken in the direction of arrows 10--10
of FIG. 1.
It will be understood that the above drawings illustrate merely a
preferred embodiment of the invention, and that other embodiments
are contemplated within the scope of the claims hereafter set
forth.
Referring to the drawings, the present door lock includes a hollow
rectangular casing 11 with removable cover plate 13 having a series
of laterally projecting tabs 15 adapted for interlock positioning
within corresponding slots 17 formed in the casing and face plate
19 and wherein no fasteners are required. However a single fastener
33 may be used to prevent accidental disassembly of the cover plate
from within said casing.
Face plate 19, apertured as shown in FIG. 6, includes a body and
with the upright outer edges thereof forwardly displaced as at 19
to provide upon the rear surface of said face plate a pair of
parallel laterally spaced fulcrums 20 adapted for supported
engagement with the end plates 23 of the casing and secured thereto
by a pair of vertically spaced fasteners 25.
Employing the fasteners 25 it appears that the face plate acting
through the adjacent fulcrum 20 would be inclined at an angle of
approximately 31/2.degree. from the normal in one direction. By the
alternate and selective use, a separate pair of laterally spaced
fasteners 27, the alternate fulcrum 20 is employed as shown in FIG.
6 whereby the face plate is tipped at an opposite complemental
angle of 31/2.degree. from the normal as is often desired in lock
assemblies.
With the selective use of all four of the fasteners 25 and 27,
there may be an angular adjustment of the face plate with respect
to the normal through an arc of 7.degree. approximately.
The horizontally disposed spring-biased latch bolt 35 under the
action of leaf spring 55, FIG. 4, is normally biased to the door
locking position shown in FIGS. 1 and 4 extending through face
plate 19 and the adjacent armor plate 29, FIG. 2, which is secured
to the face plate by fasteners 31.
As shown in FIG. 2, said latch bolt has a series of projections 37
which are movably positioned within corresponding apertures in the
face plate and armor plate. Said latch bolt includes an elongated
hub 39 having a transverse slot 41 which receives the transverse
latch bolt guide and support pin 43 anchored within the casing and
its cover plate.
Inner and outer manually rotatable hubs 45 and 47 are positioned
face to face within said casing, with portions of their bodies
journalled within corresponding apertures in the casing and cover
plate as at 49. Each hub includes an upright arm 51 so that upon
activation of the corresponding handles 93 and 95 shown
fragmentarily in FIG. 7 may be rotated clockwise limited by the
stop 61 and against the action of the corresponding formed leaf
springs 57 anchored at 59.
The latch bolt 39 at its inner end has an inwardly projecting right
angular tab 53 which normally lies in the path of rotation of the
inner hub and its associated arm 51 by which upon rotation of the
inner handle or door knob 95, the latch bolt may be retracted at
all times for opening the door.
An S-shaped clutch 63 is pivotally mounted intermediate its ends at
65 upon the latch bolt and is normally biased by the leaf spring 55
to the normal lock condition, i.e., in a counterclockwise direction
so as to be disengaged from the arm 51 of the outer hub 47 when the
door is locked as in a situation shown in FIG. 4. The door lock is
shown unlocked in FIG. 1 and here it is noted that the clutch 63
has been rotated clockwise so that a portion thereof is in the path
of rotation of the outer hub by which the latch bolt may be
retracted from the outside.
Conventional cylinder lock 67, FIG. 7, is projected through the
corresponding aperture in the cover plate and includes a cylinder
69 with key hole 71, FIG. 1, and a rotatable cam 73 secured to said
lock cylinder.
Transverse apertured plate 75 within said casing and cover plate as
shown in FIG. 8 includes lateral bosses 77 nested within
corresponding apertures in said casing and cover plate is adapted
to receive the screws 79 which project within an exterior
longitudinal slot 81 in the lock cylinder for anchoring the
cylinder in position, once it has been threaded through the cover
plate as shown in FIG. 7.
The lock cylinder cam 73 is primarily intended upon rotation of
said cylinder for effecting projection and retraction of the dead
bolt 133 and is also adapted for key operated retraction
successively of the latch bolt 35 when the door is in a locked
condition as in FIG. 4.
Accordingly, the cylinder cam 73 is normally positioned between a
pair of spaced cams 83 which project from and above the thumb-turn
hub 85 whose axial bosses 87 journal and support the thumb-turn hub
within said casing. Said thumb-turn hub has a square aperture
therein adapted to receive the conventional handle 91, FIG. 4, by
which the thumb-turn hub may be manually rotated from the inside of
the door when it is employed for projecting or retracting the dead
bolt in the manner hereafter described with respect to FIG. 1.
In the illustration shown in FIG. 4, no dead bolt is employed as in
the case of a public school or other area where a dead bolt is not
desired. In this situation, pin 89 projects laterally from the
thumb-turn hub, FIG. 4, and upon manual rotation of the thumb-turn
hub from the inside of the door in a clockwise direction, will in
turn, rotate the clutch 63 in a clockwise direction so that its
left end FIG. 4, is adapted to lift the locking lever to a
non-blocking position as hereafter described and wherein thus the
inner handle is capable of retracting the latch bolt. With the dead
bolt omitted, the lock button 97 is also omitted. It is shown in
FIG. 4 in dotted lines merely to show its "locked position" with
respect to the "unlocked position" in FIG. 1.
Additionally, as hereafter described, rotation of the cylinder cam
73 by the use of a key in the lock cylinder is adapted to
operatively engage upper transmission bar 143 which, in turn,
engages lower transmission bar 149 and which in turn, engages the
clutch 63 for retracting the latch bolt 35. Here also the lower
transmission bar 149 rotates the clutch from the position shown in
FIG. 4 to the position shown in FIG. 1 to disengage the locking
lever 109 from its normal blocking position relative to the latch
bolt as further described in detail.
The present lock may be provided with a pivotal lock button 97
which is nested within the housing and pivoted thereto at 99 and
which includes a spring-biased ball detent 101 registerable with
one of a pair of casing apertures 105 and 103 when the lock button
is in unlocked condition, FIG. 1, or in locked condition, FIG.
4.
The lock button includes front actuating plate 102 used for tilting
the lock button to the lock position, FIG. 4, and an additional
front face 106 which is used for rotating the lock button to the
unlocked position shown in FIG. 1. Here the top plate 104 of the
lock button is supportably engaging the clutch and has rotated the
same in a clockwise direction so that it engages the outer hub and
lifts the locking lever. Thus, the door is unlocked and rotation of
the outer door knob 93 will retract the locking lever.
It is noted in FIG. 4 that the top plate 104 is out of engagement
with the clutch which is, thus, normally spring-biased to the door
lock position and condition of FIG. 4.
As shown in FIG. 1, the catch 107 projects upwardly from the lock
button 97 rearwardly of plate 104 and interlocks with an
undersurface portion of the latch bolt.
Accordingly, in order to shift the lock button 97 from the unlocked
condition, FIG. 1, to the locked condition of FIG. 4, it is first
necessary to manually retract the latch bolt 35.
LOCKING LEVER
Locking lever 109 is horizontally disposed within the casing and at
one end is pivotally mounted thereon at 111 and is normally
spring-biased as at 113 so that its forward stop end 115 is
positioned directly behind the latch bolt 35 normally blocking the
same against retraction as in FIG. 4. This will prevent
unauthorized manual retraction of the latch bolt. It is seen in
FIG. 4 that the clutch is in an inactive position when the lock is
locked. Thus, manual rotation of the outer hub will not retract
said latch bolt.
Pin 117 is mounted on and projects laterally of the locking lever
109 so that it is engaged by the clutch 63 when the clutch has been
in one manner or another rotated to the control position shown in
FIG. 1. In FIG. 1, the clutch has been rotated so as to lift the
locking lever 109 so as to be non-blocking with respect to the
latch bolt 35.
Stop button 121 has a tapered front face so that when the door is
closed with respect to the door jam, the stop button will be
projected inwardly to the position shown in FIG. 4. Said stop
button 121 includes an axial shank 123 which is slidably positioned
within the guide 125 disposed within said casing, there being a
suitable coil spring 127 normally biasing the stop button 121 to
the outer-most position through the face plate as shown in FIG. 1.
The stop button 121 and its connected shank 123 includes the
depending hub 129 which has a forwardly inclined cam 131. When the
stop button 121 is in its normal position with the door open, said
cam 131 supportably engages pin 117 on the locking lever so as to
position said locking lever in a non-blocking condition to
facilitate retraction of the latch bolt 35.
As shown in FIG. 4, when the door has been closed, the stop button
has been retracted by the door jam to a position shown with the
result that the said cam 131 no longer supportably engages the pin
117 and, thus, the locking lever has been spring-biased downwardly
into blocking position with respect to the latch bolt 35.
The horizontally disposed dead bolt 133 is slidably nested within
said casing and projects through a corresponding aperture in the
face plate 19 and connected thereto rearwardly thereof is the hub
135, an upper portion of which is slidably mounted relative to
transverse plate 75 within said housing as best shown in FIGS. 1, 4
and 8 for guiding forward movements and retraction of said dead
bolt within said casing.
Provided through the dead bolt hub is an irregularly shaped cam
slot 137.
Cantilever arm 141 forming a part of the thumb-turn hub 85 mounts
at its end transverse pin 139 which is nested and retained slidably
within the dead bolt hub slot 137 whereby upon rotation of the
thumb-turn hub 85 in one direction, i.e., clockwise from the
interior of the door, the dead bolt 133 will be projected to a
locking position. Upon rotation in the opposite direction of said
thumb-turn hub, acting through the pin and slot the dead bolt 133
will be retracted to the unlocked position shown in FIG. 1.
Upper transmission bar 143, of inverted U-shape, as shown in FIG.
9, includes a pair of depending legs 145 which are positioned upon
opposite sides of the dead bolt hub and pivotally connected thereto
at 147.
The lower transmission bar 149 underlies a portion of the upper
transmission bar, and at its upper end, is pivotally connected as
at 151 to the thumb-turn hub 85 which is biased in a
counterclockwise direction as viewed in FIG. 1 by the leaf spring
153 within said casing.
OPERATION
In operation, it is seen that the upper free end of the upper
transmission bar 143 lies in the path of rotation of the cylinder
cam 73 when it has been manually rotated by the key-operating said
cylinder to the position shown in FIG. 4. Here said cam operatively
engages the upper transmission bar, pivoting the same around its
pivot 147 which, in turn, operatively engages the lower
transmission bar moving it about its pivot 151. The lower
transmission bar at its lower portion operatively engages the
clutch 63. This accomplishes two things.
First, the clutch is rotated to the clockwise position shown in
FIG. 1 so that its left end engages and lifts the pin 117 on the
locking lever 109. Additionally, the lower transmission bar is
effective for retracting latch bolt 35 since the clutch, when
rotated as shown in FIG. 1 has lifted the locking lever out of
blocking position.
Ordinarily, therefore, utilizing a key to rotate the lock cylinder
69 from the outside of the door, the cam 73 is first effective for
retracting the dead bolt if it has been projected forwardly, to an
unlocked condition. Still the door may not be opened until the
cylinder 69 has been further rotated in a counterclockwise
direction as shown in FIG. 1 to engage the upper end of the upper
transmission bar 143. This pivots the lower transmission bar
downwardly so as to cause retraction of the latch bolt 35 and at
the same time, positioning the clutch 65 in such position as to
lift the locking lever 109 to a non-blocking position.
When it is desired to retain latch bolt 35 in retracted position,
as in FIG. 4, after retraction, the lock button is rotated
counterclockwise to the position shown in FIG. 1. The inner end of
plate 104 retainingly engages clutch 63 holding the latch bolt
retracted.
Having described my invention, reference should now be had to the
following claims.
* * * * *