US3316001A - Unit lock deadlocking blocker lifter - Google Patents

Description

F. J. RUSSELL ET AL 3,316,001

UNIT LOCK DEADLOCKING BLOCKER LIFTER April 25, 1967 5 Sheets-Sheet l Filed May 1964 em, as I R0652 7; N04 IN INVENTORS L a s S u R J o w r MW 3. 3M

ATTORNEY April 25, 1967 J, RUSSELL ET AL 3,316,001

UNIT LOCK DEADLOCKING BLOCKER LIFTER Filed May 5, 1964 3 Sheets-Sheet 2 $1 5 IO 55 27! A 4o 48 52 47 G7 G8 F250 J. RU S R065 J; NOL/N INVENTORS l/w zw/ ID. 3%

April 25, 19 67 F, J RU ET AL 3,316,001

UNIT LOCK DEADLOCKING BLOCKER LIFTER 3 Sheets-$heet 5 Filed May 5, 1964 0 2 W k 6/ 6 (K WW WNW L w H 0 2| an as 43 4| L L E s U R J m F 120652 J, NOL/N INVENTORS ATTORNEY United States Patent 3,316,001 UNIT LOCK DEADLOCKING BLOCKER LIFTER Fred J. Russell, 8635 Otis St., South Gate, Calif. 90280, and Roger J. Nolin, Monterey Park, Calif.; said Nolin assignor to said Russell 1 Filed May 5, 1964, Ser. No. 364,988 Claims. (Cl. 292-153) The invention here under consideration is embodied in a door lock with special reference to door locks frequently identified as unit locks, the invention being more particularly concerned with a guard bolt for the main latch bolt, including means for releasing the guard bolt action by manipulation of conventional retracting means for the latch bolt.

For extra seourity in locks of this nature, a guard bolt is provided in addition to the conventional latch bolt, the action of which is to make the lock more tamper proof. Guard bolts take various forms, some lying immediately adjacent the latch bolt, and others spaced from the latch bolt to allow more room for the working mechanism. The purpose of such guard bolts, however, is essentially the same, namely, to act in such fashion that, when depressed, a physical block is interposed in the latch bolt action so that the latch bolt cannot be pried into a door opening position by unauthorized means. The customary fashion for manipulating a guard bolt of this kind is to have it so mounted on the frame that, when the door is closed, the guard bolt is depressed by the strike plate, the guard bolt remaining in depressed position as long as the door remains closed, and thereafter springing to extended position when the door is open.

When, however, a guard bolt acts in this fashion, some appropriate means must be provided for disengaging guard bolt action while the door remains closed so that the latch bolt can be withdrawn by manipulation of the knob and the door opened.

It is, therefore, among the objects of the invention to provide a new and improved device for disengaging action of a guard bolt when the door is closed so that the latch bolt can be withdrawn and the door opened.

Another object of the invention is to provide a new and improved disengaging device which quickly and easily shifts the guard bolt mechanism from blocking to unblocking position by manipulation of a substantially conventional latch bolt retractor.

Still another object of the invention is to provide a new and improved disengaging device for shifting a guard bolt mechanism from blocking position which is smooth and positive in its action, which is mugged in its characteristics and structural design, and which is also simple in its design and operation, so that it can be made use of in a typical unit type lock without in any Way impairing the high degree of security customarily associated with locks of this nature.

With these and other objects in view, the invention consists in the construction, arrangement, and combination of the various parts of the device whereby the objects contemplated are attained, as hereinafter set forth, pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings:

FIGURE 1 is a side perspective view showing a unit lock, in which the invention is embodied, mounted in a door.

3,316,001 Patented Apr. 25, 1967 ice FIGURE 2 is a longitudinal sectional view of the operating parts of the device showing both latch bolt and guard bolt in extended positions.

FIGURE 3 is a longitudinal sectional view of the same mechanism of FIGURE 2 but showing the position of parts when the door is in closed position, the latch bolt received in a strike plate recess, and the guard bolt depressed, the View being along the line 3-3 of FIGURE 5.

FIGURE 4 is a plan view taken on the line 4-4 of FIGURE 2 but with the end portion of the frame removed to reveal the working parts.

FIGURE 5 is a transverse sectional view taken on the line 55 of FIGURE 3 with the end portion of the frame cut away to reveal the Working parts.

FIGURE 6 is a transverse sectional view taken on the line 66 of FIGURE 3.

FIGURE 7 is a fragmentary transverse sectional view similar to FIGURE 3 but showing the position of parts after the guard bolt action has been rendered ineffective.

FIGURE 8 is a fragmentary perspective view of a portion of the guard bolt mechanism and. the device employed for rendering the guard bolt mechanism ineffective.

In an embodiment of the device which has been chosen for the purpose of illustration, the mechanism is pictured and described in connection with a unit type lock, though it should be recognized that the mechanism broadly need not necessarily be confined to locks of this particular description and construction.

A unit type lock indicated generally by the reference character 10 is shown installed in a door 11, the lock 10 being provided with a knob 12, a rose 13 overlying a side face :14 of the door 11 and part of a frame 15 shown within a cutout 16 in an edge 17 of the door 11.

In the chosen embodiment, the frame 15 may be construed as consisting of a front wall 18, side Walls 19 and 20, end walls like the end wall 21 visible in FIGURES 2, 3, and 7, and a rear wall 22. In the front wall 18 is a relatively large opening 23 in which is located a latch bolt 24 and a relatively small opening 25 in which is located a guard bolt 26.

For purposes of illustration, the latch bolt 24 is shown as a tiltably mounted latch bolt secured to the frame by employment of a pivot pin 27. The pivot pin 27 may be made long enough so that it serves also as a means of tiltably mounting the guard bolt 26 on the frame 15. Extending inwardly from the latch bolt 24 is a tailpiece 28 which is pivotally secured to the latch bolt 24 by means of a pin 29. The tailpiece 28 extends through a hole 30 in the rear wall 22. A retractor 31 of substantially con ventional construction has a hole 32 in alignment with the hole 30 through which the tailpiece 28 passes. A cross bar 33 at the innermost end of the tailpiece 28 overlies a portion of the retractor 31, so that when the retractor, as viewed in FIGURES 2, 3 and 4, is moved inwardly from left to right, movement of the retractor 31 will be transferred to the tailpiece 28 through the cross bar 33, and the latch bolt 24 can by this action be withdrawn from the extended position of FIGURES 2, 3, and 4 to a retracted position, not specifically illustrated. A spring 34 is provided to act between the rear wall 22 and a plate section 35 which is moved against the inner side of the latch bolt 24, serving thereby as a return spring for the latch bolt 24.

As previously indicated, it is the function of the guard bolt 26 to block retraction of the latch bolt 24. Mechanism for accomplishing this is embodied in part in a blocker indicated generally by the reference character 40 which may be described as a bracket having bracket arms 41, 41' at its inner end and a pivot pin 42 pivotally mounting the blocker 40 upon the side walls 19 and 20 of the frame 15. In this way, the blocker 40 has a pivotal connection to the frame 15. A platform 43 as shown in FIGURES and 8, forming part of the blocker 40, extends transversely with respect to the movement generally of the guard bolt 26. The platform 43 is also tilted slightly, as shown in FIGURE 2. An extension 44 of the blocker 40 carries at its free end a projection 45. It is the projection 45 which does the blocking for which the blocker 40 is designed. The latch bolt 24 may be described as having what may be designated a shelf 46 on its inner side, whichserves as a specific area against which the projection 45 may register.

In order to manipulate the blocker 40, the trip arm 47 is made use of. At its outer end, the trip arm 47 is pivotally attached to the guard bolt 26 by employment of a pivot pin 48, and the pivot pin 48 may at the same time-be made use of as a stop to limit outward movement of the guard bolt 26 about the pivot pin 27 on which it is mounted. In the platform 43 is an aperture 49, and the trip arm 47 projects through the aperture 49, and it is bent on its :free end to form a finger 50. It is important to note that the trip arm 47 has a smooth, sliding fit in the aperture 49 and that the finger 50 has a point of contact 51 with the inner or under side of the platform 43 which, for purposes of explanation, should be noted as having a predetermined distance offset with respect to the center of rotation of the pivot pin 42.

A spring 52, serving as a compression spring, surrounds the trip arm 47 and presses at its outer end against a surface 53 on the insidev of the guard bolt 26. At its other end, the spring 52 is pressed into engagement with the platform 43. In this connection, it should be noted that the point of engagement of the spring 52 with the platform 43 occurs at a distance from the pivot pin 42 less than the distance between the point of contact 51 of the, finger 50 and the pivot pin 42. In this respect, it may be said that the bracket 41 and the platform 43 thereon serves as a third class lever with an application of force at a point of contact 51 (see FIGURE 2) at a distance from the fulcrum, which is the center of rotation of the pivot pin 42, greater than the distance from the fulcrum to the location of the resistance supplied by the spring 52.

The mechanism described up tothis point is the guard bolt mechanism which serves to block retraction of the latch bolt 24 when the door 11 is closed as shown in FIGURES 3, 5, 6, and 7. Blocking is accomplished by moving the guard bolt 26 to a retracted position. This happens when the door 11 closes, and the guard bolt 26 engages a flat portion of a strike plate 55 which is mounted on a door jamb 56. The strike plate 55, incidentally, may be provided with a recess 57 located in a hole 58 made at an appropriate location on the door jamb 56. As the guard bolt 26 is depressed, or, in other words, pivotally swung about the pivot pin 27, the trip arm 47 moves inwardly or in a direction from left to right, as viewed in FIGURES 2, 3, 4, 5, 6, and 7. When this occurs, the finger 50 and its point of contact 51 is pushed entirely clear of the platform 43 as advantageously shown in FIGURES 3 and 7. As a consequence, the only force then applied against the blocker 40 is the force exerted by the spring 52 pressing upon the platform 43 at a location ofiset with respect to the pivot pin 42, and this force tends to rotate the blocker 40 in a counter-clockwise direction, as viewed in FIGURES 2 and 3, moving the projection 45 from the position of FIGURE 2 to the position of FIGURE 3. In the position of FIGURE 3, the projection 45 is opposite the shelf 46 of the latch bolt 24, and consequently the latch bolt 24 cannot be retracted,

and the door 11 cannot be opened. Therefore, some means must be provided for moving the blocker 40 and the projection 45 from blocked position, as just described, to a removed or unblocked position. Unblocking is accomplished when the retractor 31 is manipulated in a conventional fashion by rotation of the knob 12. The mechanism for translating rotating movement of the knob 12 to the retractor 31 is not shown nor described because this is a common expedient well known to those skilled in the art.

To make use of the motion of the retractor 31, there is employed a slide 60, having opposite edges 61 and 62 respectively (see FIGURE 8), slidably mounted in slideways 61' and 62' on the inner faces of respective side walls 19 and 20 of the frame 15. On the slide 60 is a tailpiece 63 which extends through a hole 64 in the rear wall 22 (see FIGURE 3) and through an aligned hole 65 in the retractor 31. A cross bar 66 at the innermost end of the tailpiece 63 overlies an appropriate portion of the retractor 31 so that, when the retractor moves from left to right as viewed in FIGURES 2, 3, 4, 5, 6, and 7, the slide 60 will be pulled in the same direction. A shoulder 60' (see FIGURE 7) on the slide 60 engages the plate section 35. Thus, the action of the spring 34 results in always urging the slide 60 toward the left, as viewed in FIGURE 7. And this spring action is overcome when the slide 60 is moved toward the right by the retractor 31.

On the slide 60 is a lifter 67 which engages a bridge 68, forming part of the blocker 40. This action is best viewed in FIGURE 3 of the drawings. As the lifter 67 moves against the bridge 68, the blocker 40 is caused to tilt in a clockwise direction, as viewed in FIGURE 3, a distance far enough to move the projection 45 out of its blocking position relative to the shelf 46. The last described position is shown to good advantage in FIGURE 7, as well as in FIGURE 2.

It is significant to note that engagement of the retractor 31 with the cross bar 66 of the tailpiece 63 of the slide 60 takes place before engagement of the retractor 31 with the cross bar 33 of the tailpiece 28 which operates the latch bolt 24. Although there is only a short interval between these'two engagements, it is sufficient to cause the projection 45 to be moved from its locking position behind the latch bolt 24 before the latch bolt 24 moves to a point of touching the projection 45. Therefore, there will be no binding which would otherwise interfere with positive unblocking of the latch bolt 24 at the proper time. Because of the structure described, unblocking is a positive action, which must take place as the parts move, therefore, cannot fail. Thereafter, the latch bolt 24 is pulled to withdrawn position by continued movement of the retractor 31, and the door 11 is swung open.

Thereafter, when the retractor 31 is released, the latch bolt 24 is moved back to extended position by action of the spring 34, and at the same time the guard bolt 26 is moved back to its extended position by action of the spring 52. When this happens, the finger 50 will be \moved outwardly again from the position of FIGURES 3 and 7 to the position of FIGURE 2. This movement will cause the point of contact 51 of the finger 50 with the under side of the platform 43 to take place at a distance farther from the center of rotation of the pivot pin 42 than the point of engagement of the spring 52 with the platform 43, and, accordingly, the force will be greater in a counter-clockwise direction, as viewed in FIGURE 2, which results in the blocker 40 being held in the position of FIGURE 2 where the projection 45 remains removed from blocking position beneath the latch bolt 24.

While the invention has herein been shown and described 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 invention, which is not to be limited to thedetails disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices.

Having described the invention, what is claimed as new in support of Letters Patent is:

1. In a lock, a frame having separate spaced openings therein, a latch bolt in one of said openings having a movable mounting on said frame for movement to extended and retracted positions, and a reciprocating retractor mounted in the lock in operable engagement with said latch bolt, a guard bolt in another of said openings having a location in said frame separate and spaced from said latch bolt, said guard bolt having a movable mounting on the frame for movement to extended and retracted positions, and a blocker for said latch bolt in substantial alignment with said guard bolt having at one end a pivotal connection to the frame, a projection on said blocker having a blocking position in relation to said latch bolt spanning the space between the latch bolt and the guard bolt and a released position in relation to said latch bolt, means in operable engagement respectively with said guard bolt and said blocker for moving said projection between blocking and released positions, and means for shifting said blocker from blocking to released positions by action of said retractor comprising an inwardly open channel means in said frame forming a slideway, a slide in sliding engagement with said slideway, said slide being located between ends of said slideway and being slidable between said ends, an extension on said slide having an operable engagement with said retractor, a transverse element on the blocker and a lifter on said slide 'having a camming engagement with said transverse element adapted to tilt said blocker in response to inward sliding movement of said slide whereby to shift said blocker to released position.

2. In a lock, a frame having laterally spaced openings therein, a latch bolt having a movable mounting on said frame in one of said openings for movement toextended and retracted positions, and a reciprocating retractor in the lock in operable engagement with said latch bolt, a guard bolt having a movable mounting on the frame in another of said openings for movement to extended and retracted positions, and a blocker for said latch bolt having at one end a pivotal connection to the frame, a projection on said blocker having a blocking position in relation to said latch bolt and a released position in relation to said latch bolt, means in operable engagement respectively with said guard bolt and said blocker for moving said projection between blocking and released positions, and means for shifting said blocker from blocking to released positions by action of said retractor comprising an inwardly open pair of parallel spaced channels in said frame forming a slideway at a location between the latch bolt and the blocker and extending in a direction substantially parallel to the direction of movement of said retractor, a slide in sliding engagement with said slideway, an extension on said slide extending parallel to said channels having an operable engagement with said retractor, a transverse element on said blocker and a lifter on said slide having a camming engagement with said transverse element adapted to tilt said blocker inra direction away from said latch bolt in response to inward movement of said slide in advance of movement of said latch bolt whereby to shift said blocker to released position in advance of withdrawal of said latch bolt by action of said retractor.

3. In a lock, a frame having a pair of separate laterally spaced openings therein, a latch bolt having a movable mounting on said frame in one of said openings for movement to extended and retracted positions, and a reciproeating retractor mounted in the lock in operable engagement with said latch bolt, a guard bolt having a movable mounting on the frame in the other of said openings for movement to extended and retracted positions, and a blocker for said latch bolt having at one end a pivotal connection to the frame, a projection on said blocker having a blocking position for said latch bolt and a released position removed from said latch bolt, means in operable engagement respectively with said guard bolt and said blocker for moving said projection between blocking and released positions, and means for shifting said blocker from blocking t-o released positions by action of said retractor comprising a pair of spaced inwardly open channels in said frame forming a slideway, a slide in sliding engagement with said slideway, said slide comprising a plate with opposite parallel side edges in said respective channels, an extension on said slide having an operable engagement with said retractor, means on said blocker forming a bridge over said slide and a lifter on said slide having a camming engagement with said bridge in response to inward movement of said slide whereby to shift said blocker to released position, said means in operable engagement respectively with said guard bolt and said blocker comprising a trip arm attached to said guard bolt and a finger on said trip arm having a position of engagement with said blocker in a direction productive of movement of said blocker to said released position when said guard bolt is in said extended position.

4. In a lock, 9, frame having openings therein, a latch bolt having a movable mounting on said frame for move ment to extended and retracted positions, and a reciprocating retractor mounted in the lock in operable engagement with said latch bolt, a guard bolt having a location separate and spaced from said latch bolt, said guard bolt having a movable mounting on the frame for movement to extended and retracted positions, and a blocker for said latch bolt having at one end a pivotal connection to the frame, a projection on said blocker having a blocking position for said latch bolt and a released position removed from said latch bolt, means in operable engagement respectively with said guard bolt and said blocker for moving said projection between blocking and released positions, and means for shifting said blocker from blocking to released positions by action of said retractor comprising a stationary slideway in said frame extending from a location adjacent said retractor to a location adjacent the openings in said frame, a slide slideably mounted in said slideway, said slide having a length extending for a substantial portion of the length of said slideway, an extension on said slide having an operable engagement with said retractor, a transverse element on the blocker and a lifter on said slide having a camming engagement with said transverse element adapted to lift said blocker in response to inward movement of said slide whereby to shift said blocker to released position, said means in operable engagement with said guard bolt and said blocker including a spring engageable respectively with said guard bolt and with said blocker'in a direction productive of movement of said blocker to blocking position when said guard bolt is in said retracted position.

5. In a lock, a frame having openings therein, a latch bolt having a movable mounting on said frame for movement to extended and retracted positions, and a reciprocating retractor mounted in the lock in operable engagement with said latch bolt, a guard bolt having a movable mounting on the frame for movement to extended and retracted positions, and a blocker for said latch bolt having at one end a pivotal connection to the frame, a projection on said blocker having a blocking position for said latch bolt and a released position removed from said latch bolt, means in operable engagement respectively with said guard bolt and said blocker for moving said projection between blocking and released positions, and means for shifting said blocker from blocking to released positions by action of said retractor comprising a slideway in said frame, a slide slidably mounted in said slideway, an extension on said slide having an operable engagement with said retractor, a transverse element on said blocker at a location removed from said pivotal connection and a lifter on said slide having a camming engagement with transverse element whereby to tilt said blocker in response to inward movement of said slide whereby to shift said blocker to released position, return spring means biased between said frame and respectively said latch bolt and said slide whereby to effect outward movement of said slide, a trip arm attached to said guard bolt, a finger on said trip arm having a position of engagement with said blocker in a direction productive of movement of said blocker to said released position when said guard bolt is in said extended position, said means for moving said projection between blocking and released position including a spring engageable respectively with said guard bolt and with said blocker in a direction productive of movement of said blocker toblocking position when said guard bolt is in said retracted position.

References Cited by the Examiner UNITED STATES PATENTS 834,994 11/1906 Phelps 70--l51 E5 Voight 70-151 Schlage 292337 Welch 70- -15 1 Russell 70-4151 X Golden et a1 292-169 Schweitzer 292-222 X BOBBY R. GAY, Primary Examiner.

RICHARD E. MOORE, Examiner.

J. R. MOSES, Assistant Examiner.

Claims (1)

1. IN A LOCK, A FRAME HAVING SEPARATE SPACED OPENINGS THEREIN, A LATCH BOLT IN ONE OF SAID OPENINGS HAVING A MOVABLE MOUNTING ON SAID FRAME FOR MOVEMENT TO EXTENDED AND RETRACTED POSITIONS, AND A RECIPROCATING RETRACTOR MOUNTED IN THE LOCK IN OPERABLE ENGAGEMENT WITH SAID LATCH BOLT, A GUARD BOLT IN ANOTHER OF SAID OPENINGS HAVING A LOCATION IN SAID FRAME SEPARATE AND SPACED FROM SAID LATCH BOLT, SAID GUARD BOLT HAVING A MOVABLE MOUNTING ON THE FRAME FOR MOVEMENT TO EXTENDED AND RETRACTED POSITIONS, AND A BLOCKER FOR SAID LATCH BOLT IN SUBSTANTIAL ALIGNMENT WITH SAID GUARD BOLT HAVING AT ONE END A PIVOTAL CONNECTION TO THE FRAME, A PROJECTION ON SAID BLOCKER HAVING A BLOCKING POSITION IN RELATION TO SAID LATCH BOLT SPANNING THE SPACE BETWEEN THE LATCH BOLT AND THE GUARD BOLT AND A RELEASED POSITION IN RELATION TO SAID LATCH BOLT, MEANS IN OPERABLE ENGAGEMENT RESPECTIVELY WITH SAID GUARD BOLT AND SAID BLOCKER FOR MOVING SAID PROJECTION BETWEEN BLOCKING AND RELEASED POSITIONS, AND MEANS FOR SHIFTING SAID BLOCKER FROM BLOCKING TO RELEASED POSITIONS BY ACTION OF SAID RETRACTOR COMPRISING AN INWARDLY OPEN CHANNEL MEANS IN SAID FRAME FORMING A SLIDEWAY, A SLIDE IN SLIDING ENGAGEMENT WITH SAID SLIDEWAY, SAID SLIDE BEING LOCATED BETWEEN ENDS OF SAID SLIDEWAY AND BEING SLIDABLE BETWEEN SAID ENDS, AN EXTENSION ON SAID SLIDE HAVING AN OPERABLE ENGAGEMENT WITH SAID RETRACTOR, A TRANSVERSE ELEMENT ON THE BLOCKER AND A LIFTER ON SAID SLIDE HAVING A CAMMING ENGAGEMENT WITH SAID TRANSVERSE ELEMENT ADAPTED TO TILT SAID BLOCKER IN RESPONSE TO INWARD SLIDING MOVEMENT OF SAID SLIDE WHEREBY TO SHIFT SAID BLOCKER TO RELEASED POSITION.

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