US2176800A

US2176800A - Lock

Info

Publication number: US2176800A
Application number: US94132A
Authority: US
Inventors: Henry B Moninger
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-08-04
Filing date: 1936-08-04
Publication date: 1939-10-17
Anticipated expiration: 1956-10-17

Description

Oct. 17, 1939. H. a'MoNlNGER LOCK Filed Aug. 4, 1936 2 Sheets-Sheet l All INVENTolg. /Yelzr 21% eg:

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LOCK

Filed Aug. 4, 1936 2 Sheets-Sheet 2 INVENTOR,

A TTORNEY- Patented Oct. 17, 1939 .Unirse smits PATENT OFFICE LOCK Henry E. Moninger, Philadelphia, Pa.

Application August 4,

11 Claims.

This invention relates to improvements in locks and it is particularly useful for pin tumbler cylinder locks having the usual rotatable key plug for withdrawing the customary spring actuated door latch.` When the key is inserted in the key Y plug, the tumblers are operated to break position tov permit the key plug to be turned and withdraw the latch by means of the roll back arm or cam which is attached to the key plug.

One of the objects of the invention is to provide a lock which has self-contained therein, means for securing the lock cylinder in the lock casing.- Heretofore the locks have been secured by such means as a screw bolt, which makes unauthorized removal of the lock a relatively simple matter. By my invention it is, for all practical purposes, impossible to effect an unauthorized removal of the lock.

Another object of the invention is to provide the lock, as a self-contained part thereof, with shut-out means whereby the lock can be rendered temporarily inoperable by anyone other thanA thefholder of the key by means of which the shut-out is made effective or ineffective.

'55 `In the preferred form of my invention, I proposit'o combine both the improved lock securing means and the shut-out means in a self -contaned lock unit.

`More specifically, it is an object of my inven- 30TV tion to provide a slidable bar or bolt as part of the lock, which bar functions to secure the lock cylinder in the lock casing, preventing the unauthorized` removal of the lock; and to provide ashut-out, which is slidable in the said bar and' is movable to a position making it impossible to operate the roll back arm.

The keys employed when the foregoing features are applied to a standard form of key plug, tumbler lock, vmay be described as follows: First,

40"' the key that operates the slidable bar which locks or secures the lock cylinder in .the lock casing; second, the key which operates the shut-out to prevent the functioning of all other keys otherwise operable; third, the usual guest or changeV key;r and. fourth, the usual variety of master keys;

'Ilaccomplish the foregoing, together with such other objects and advantages as will hereinafter appear or are incident to my invention, by means of the lock mechanism shown in the accompanying drawings, wherein:

Figure 1 is an elevational view of a portion of the interior of the lock receiving casing or casting,tshowing. the' lock cylinder attached thereto and with the locking bar in its protracted posi- 1936, Serial N0. 94,132

(Cl. 'l0- 341) tion, operable to prevent unauthorized removal of the lock from the casing;

Figure 2, a sectional view taken on the line 2-2 of Figure 1;

Figure 3 is an end view showing the shutr. outl block inl position to prevent the use of the guest and the usual master keys;

Figure 4 is a View corresponding with Figure 3 but with the roll back arm removed to more clearly show how the shut-out block prevents operation of the rollY back arm;

Figure 5 is a longitudinal sectional View through the axis of the lock cylinder and key plug, with a guest or change key in place;

Figure 6 is a fragmentary sectional view through the axis showing part of an inserted special key which operates the "shut-out block, said.l key having formed at its cam end an additional bit of an. elevation to adjust the parts to be operated; 20

Figure '7 is a fragmentary sectional view through the axis of the lock', showing part of a special key which operates the slidable bar for retaining the lock' cylinder in the casing, said key having formed at its cam end, an additional bit of an elevation to adjust the parts to be opera'ted;

Figure 8' is a section taken on the line 8 8 of Figure 5- showing this slidable locking bar in its protracted, operative locking position;

Figure 9 is a view corresponding to Figure 8 but showing the shut-out block moved to its operative or shut-out position where the usual guest orv master keys become inoperative but with the locking bar in its protracted effective locking position..

Figure 10 is' a sectional view showing the lock cylinder sliding bar retracted and the special key (in section) which operates the bar, still in place;

Figure l1 is a perspective view of the lock cylinder locking bar;

Figure 12 is a perspective view of the shutout block;

Figure 13- is a perspective view of a duplex pin tumbler carried in the shut-out block;

Figure 14 is a sectional view showing the lock cylinder sliding bar of Figure 1 applied to a lock of the sleeve type; and

Figure 15 is a section taken on the line l5-I'5 of Figure 14:,` but drawn on a smaller scale.

Referring now toy the drawings the reference numeral l designates the casing member adapted to enclose the lock mechanism, which casing is fitted into an opening in the front edge of the door. 55

Yand 5).

The cover for the casing isindicated at 2. The internally threaded opening of the casing is shown at 3 and into this opening the lock cylinder 5 which has external threads 4, is screwed. On the inner portion of the casing I are a pair of parallel integral, spaced lugs 6 and 'l adapted to provide a space 8 receiving the end of sliding locking bar 9.

Projecting from the inner end of the lock cylinder 5 is the usual boss or ring 5 encircling the key plug bore 282 (see Figures 2 and 4). Directly above and transecting the top of this ring down to the depth of its inner circumference, is a transverse groove 8 into which the locking bar 9 is adapted to be snugly received. The bottom of the groove 8 provides a substantial support or bearing surface not only for the bar 9 but also for the plate 2D of the shut-out block indicated as a whole by the reference numeral |15.

It will be clear from the drawings that when the sliding bar 9 is operated so that its work end enters space 8 between the lugs 6 and 'I, it effectively prevents the lock cylinder 5 from being unthreaded and removed from the casing I.

Reference will now be made to the means by which the bar 9 may be operated. Formed within the bar 9 is a recess I I (see Figures 8-11 inclusive) and bored through the upper wall of this recess and extending between the surfaces 9' and ID, are two parallel openings or holes I2 and I3, connected laterally by the narrow channel i4 formed by the two oppositely extending projections I4 (see particularly Figure 11).. Y

The shut-out block l5 consists of two major portions I9 and 20, the part i9 projecting into and being slidable in .the recess I I. The portion 20 moves inthe recess 2I formed in the under face of the bar 9 and is oi a greater width than the locking bar so that the part 29.of the plate 20 projects laterally from a side face of the bar. Twov holes I6 and I'I, corresponding to the holes I2 and. I3, are bored in the top of the partk I9 of the shut-0u block, these two holes also being connected laterally by the narrowchannel I8 formed by the projections I8". These holes I6V and II together with the connecting channel I8 open downwardly into an elliptically formed bottomless chamber or recess 38 in the lower* part of the portion I9 and the plate 20 (see particularly Figure 9). lThis elliptical recess houses the duplex pin tumbler 22 shown in Figure 13, when said tumbler is normally at rest upon the upper end of the specialpin tumbler 3l (see Figures 8 The recess 38 also provides room in the base of block I5 for the upward entrance of this pin tumbler when it is caused to lift and displace the duplex pin tumbler 22 (see Figure 10).

The duplex pin tumbler has two cylindrically formed parts or

pin sections

23 and 24 connected by the neck 25. vThis tumbler is normally carried in the block I5 and when the holes i9 and I1 are in registry with the holes I2 and |13, the duplex pin tumbler maybe moved to lock the bar 9 and the shut-out block togethen The bottom of the pin tumbler is formed into a concave surblock I5 is in its operative orv shutting-out position as shown in Figures 3, 4 and 9. When this occurs the roll back arm is held and can no longer engage and retract the part 29 of the latch bolt 292, thus forestalling an attempt to operate the lock unauthorizedly.

3i designates the tumbler chambers in the cylinder 5 in which the pin tumblers 32 and the actuating springs 33 are located. 34 are the usual antifriction balls which contact with the bits of the keys. The key plug 28 is formed with the usual pin tumbler openings 35 in which are located tlie pin tumblers 36. These parts constitute the conventional pin and tumbler construction, with the exception that a slight modication is made in the tumbler chamber 3I and its pin tumbler Lil'. rihis pin tumbler 41 s provided with a convex lower end 4T which bears upon the fiat upper end of the pin tumbler 36 in the tumbler chamber 35', as shown in Figures 5, 6 and '7. With the oriiices of the chambers 3| and 35 registering, the tumbler 41 under the pressure of spring 33" canpartly descend from chamber SI into chamber 35 as shown in Figures 6 and 7, or until it is stopped by contacting with tumbler 35 when the latter is positioned by a bit @l2 of either the special key 42 or the key 43, at 4 which time only the conve-x end of tumbler 41 can enter the oriiice of chamber 35. The parts as so adjusted then become a locating detent by means of which the operator knows when the key is in position to be withdrawn. It will be manifest that when the Ykey plug is rotated, the upper rim 35 (see Fig. 7) will press against the convex end i and force tumbler 41 upward until its convex end 4l is bearing on the surface of the key plug 29 and upon which it will then ride. The tumbler 4'! operates` in the usual way to pin the key plug against rotation within the cylinder. To v guest or change key 35S-so that either its convex lower end 47 is raised flush with the surface of the key plug (see Figure 5) or, its flat upper end is so aligned. The position in either instance depends upon the elevation Vof this particular bit of the inserted change key. Y Y

Formed at the top of the rearmost portion of the key plug bore 282 is a rectangular recess, extending longitudinally forward. Each side of the rectangular recess is indented with a U shapedrnotch 31 and 312,k transversely opposite and in line with the chamber 28', in which is 10- cated the pin tumbler 31 (see Figure 8). These notches are of the same width as the diameter of the chamber 2S and of such depth as to permit of the needed arcuate movement of the tumbler 3l, when it is used to actuate either the bar 9 or the block I5.

The key plug 28 is provided with the'usual key-- normally 4rest before a key is inserted. 4I is a` slidable plate which closes the upper ends of the openings of the tumbler chambers. 45 designates the innermost tumbler chamber of the cylinder 5 in which the retaining, pin tumbler 44 and the actuating spring 332 are located. The pin 44 is employed to retain the sliding bar 9 in either a protracted or retracted position; and it further acts to retain the shut-out block in either its operative or its inoperative poistion.

The operation lof the device is as follows:

`To condition the unit for screw threading into the lock. case, if the parts are Vnot already in the position of Figure 10, the procedure is as follows: the key 42 is inserted' and the bit 42 elevates the tumbler 31 which in turn elevates the duplex pin tumbler 22 until the upper surface of the latter is flush with the top surface of the locking bar,

at which time the lower face of tumbler 44 will also be iiushwith the upper surface of the locking bar. The key can now be turned clockwise looking at the face of the lock, which brings the locking bar, the shutout block and the associated partsy to the posi-tion shown in Figure 10. 'I'he key 4-2 is now turned counterclockwise until the arresting pressure of the detent tumbler 41 is felt, whereupon the key may be withdrawn. When this occurs the duplex pin tumbler and the pin 44- move downwardly under the iniiuence of the spring 332 and the locking bar and shut-out block will be locked together, with the locking bar in retracted position. The lock may now be screwed in place.

Toprevent its unauthorized removal from the door, the key 42I is used and is now turned counterclockwise, looking at they face of the lock. This can be done because when the key is inserted all parts are brought to the break position. This counterclockwise movement causes the locking end of the locking bar to move into the space and also bringsl the sh-ut-out block tothe position shownin Figu-re 8. The key is now rotated clockwise to middle position, when the detent 41 is felt and the key is withdrawn. The position of the parts is now as represented in Figures 1 and 8. When the key is withdrawn the pin 44 descends suiiic'iently to lock the bar 9 with respect to the cylinder case and also the shut-out block with respect to the bar 9. In this position it will be seen that the pin 30 clears the projecting portion 20" of the shut-out block and the roll backA arm can be swung all around so as to engage the member 29', to pull back the latch.

Either the usual guest key or the master key can now be used. It will be noticed for example on inspection of Figure 5, that the guest key is too short to in anywi'se affect the tumbler pin 31 and the cylinder and each other. f' the shut-out block shown in Figures 9, 3 and 4,

the parts associated therewith. Such is the case also with the usual master key.

Assuming now that an authorized person desires to operate the shut-out andr make the usual guest or change key and the usual master key ineffective, the procedure is as follows: Key 43 is now inserted and the bit at its cam end lifts pin 31 to the position shown in Figure 6 at which time the upper face of the duplex pin tumbler is flush with the surface 9 and the shut-out block is thus in break position with respect to the bar, the bar, however, still being locked by the pin 44. Key 43 is now turned clockwise, looking at the Yface of the lock, which shifts the shut-out block into the position shown in Figure 9 and Figures 3 and 4. 'Ihe key is then turned to neutral position and withdrawn Vwhereupon the duplex pin tumbler and the pin 44 sink, keeping the bar 9 and the shut-out block in locked position with In the position of duplex pin tumbler is out of registry and cannot move upwardly (see Figure 9).

To recondition the lock for use by either the guest key or the master key or the key 42, the operator reinserts key 43 which brings the top surface of the duplex pin tumbler flush with the surface 9', i. e., to break position of the shut-out block. The shut-out block may now be moved back to the position shown in Figure l or in Figure 8, the key brought back to neutral and withdrawn. The locking bar is still engaged in the recess 8 and the lock cannot be removed but, since part 20 is again out of the path of movement of the pin 30, the guest key or the master keyl may be operated as well las the key 42, because once more the duplex pin tumbler has been brought into registry with the holes I2 and i3. If it is desired to remove the lock the key 42 is used to retract the bar 9.

It will be seen that the means for securing the lock against unauthorized removal and the shutout means are very simple in construction and operation and the cost of the same is partly offset by the elimination of the usual screw bolt for screwing the lock in place against unauthorized removal. This simple construction avoids the necessity of a second set of tumbler chambers and associated parts in one previous form of shutout mechanism (see Patent No. 1,190,686) or the more familiar arrangement of rotatable rings or sleeves (see for example No. 1,170,481 to Coney).

With respect to the operation of the shut-out lock and particularly the movement of the shutout block to position by the key t3, the following is to be observed. It might be thought that the key after having been operated to move the parts to the position shown in Figure 9, would return the shut-out block as the key is being reversed in rotation to bring it to neutral position. It is to be noted, however, that the lower end of the pin 44 is just slightly below the top of the shut-out block and operates as a detent for the locking block until shortly after the reverse movement has begun to be imparted to the key. Once the key is in motion with respect to the duplex pin tumbler, it will continue its motion without frictionally carrying the shut-out block back from its operative position. Likewise, the same conditions eX- ist when turning the key 133 clockwise to withdraw aiter it has been used to shift the shut-out block to inoperative position.

Referring now to Figures 14 and 15, I have therein illustrated the application of the locking bar to a lock of the rotatable sleeve type. In this construction, when the special key 5I is inserted, the tumblers are brought to break position insofar as the sleeve 48 and the cylinder 5a are concerned but the sleeve 48 is locked with respect to the key plug 23a. Thereby, when the key 5i is turned, the sleeve :i8 rotates with the key plug and through the medium, of the pin 31a fitting into the recess 38a in the locking bar 9a, the locking bar operated either to its protracted or retracted position. In this case, the cylinder is provided with a groove 8a to receive the locking bar 9a. As before the key plug has a keyway 39a and a ledge lilla. The customary roll back arm is shown at 21a. lThe cylinder has the usual tumbler chambers 3 la, tumbler pins 32a and springs 33a; the key plug also has its usual chambers 35a, pins Bia and balls 34a. The sleeve has corresponding chambers.

It will be noted that because of the compact disposition of the parts they can be applied to standard types of lock cylinders of standard lengths. It will also be understood that my improvements may be readily applied to other forms of locks.

I claim:

l. In a lock, the combination with the rotatable key plug and its latch operating means, of a slidable locking bar adapted in its protracted position to engage with an adjacent part to prevent removal of the lock, means associated with the plug to be key-actuated to effect movement of the locking bar when the plug is rotated, and a slidable shut-out member movable into and out of the path of movement of the latch operating means and movable independently of the locking bar.

2. In a lock, the combination with the rotatable key plug and its latch operating means, of a slidable locking bar adapted in its protracted position to engage with an adjacent part to prevent removal of the lock, means associated with the plug to be key-actuated to effect movement of the locking bar when the plug is rotated, and a slidable shut-out member movable into and out of the path or' movement of the latch operating means and movable independently of the locking bar, the same means which effect movement of the locking bar effecting movement of the shutout member.

3. In a lock, the combination with the rotatable key plug and its latch operating means, of a slidable locking bar adapted in its protracted position to engage with an adjacent part to prevent removal of the lock, means associated with the plug to be key actuated to effect movement of the locking bar when the plug is rotated, and a slidable shut-out member movable into and out of the path of movement of the latch operating means, said shut-out member being housed in the locking bar and capable of lost motion with respect thereto.

4. In a lock, the combination with the rotatable key plug and its latch operating means, of a slidable locking bar adapted in its protracted position to engage with an adjacent part to prevent removal of the lock, means assoicated with the plug to be key-actuated to eect movement of the locking bar when the plug is rotated, and a slidable shut-out member movable into and out of the path of movement of the latch operating means, said shut-out member being housed in the locking bar and capable of lost motion with respect thereto, and being operated by the same means which effect movement of the locking bar.

5. In a lock, the combination with the rotatable key plug and its latch operating means, of a slidable locking bar adapted in its protracted position to engage with an adjacent part to prevent' removal oi the lock, means associated with the plug to be key-actuated to effect movement of the locking bar when the plug is rotated, a slidable shut-out member movable into and out oi the path of movement of the latch operating means, said shut-out member being housed in the locking bar and capable of lost motion with respect thereto, said bar and shut-out'member each having a duplex tumbler pin chamber adapted to Vbe brought into and out oil registry, and a duplex tumbler pin normally carried in the shut-out member adapted to lock the bar and the shut-outmember together when key-actuated.

6. In a lock, the combination of a lock cylinder, and a key plug and its latch operating means, of a locking bar slidable in a groove in the lock cylinder, the said lock cylinder being provided with such groove, a shut-out member housed in said bar and slidable with respect thereto and slidable therewith, and tumbler mechanism key-actuated to operate the bar and the shut-out member independently of one another or together.

7. In a lock, the combination of a lock cylinder, and a key plug and its latch operating means, of a locking bar slidable in a groove in the lock cylinder, the said lock cylinder being provided with such groove, a shut-out member housed in said bar and slidable with respect thereto and slidable therewith, and tumbler mechanism key-actuated to operate the bar and the shut-out member independently of one another or together, said tumbler mechanism in certain positions locking the bar to the lock cylinder and the shut-out member to the bar, locking the bar and shut-out member together, and aording a break between the bar and said member.

8i. In a lock, the combination with the lock cylinder and key plug and its latch operating means, oi a slidable shut-out member housed entirely within the cylinder to one side of the plug, and tumbler mechanism adapted tofbe key-actuated to engage said member to effect movement of the shut-out member when the plug is turned.

9. In a lock, the combination with a lock cylinder and a key plug and its latch operating means, oi a slidable locking bar, a shut-out member housed in said bar and slidable with respect thereto and slidable therewith, and a duplex tumbler pin housed within said shut-out member, said locking bar having a duplex tumbler receiving chamber, said tumbler Ypin 'being movable in said duplex chamber when the duplex chamber and the duplex pin are brought into registry.

10. In a lock, the 'combination of ar lock cylinder, a key plug and its latch operating means, a slidable locking bar carried in the cylinder to one side of the key plug, a shut-out member slidable in said bar, a tumbler adapted to lock the shut-out member andthe bar with respect to the cylinder and each other, and another tumbler key-actuated to render said rst tumbler ineffective to lock the shut-out member, said first tumbler projecting slightly into the shut-out member to act as a temporary detent when a key is inserted for actuation of the shut-out member.

l1. In a pin-tumbler lock, apin tumbler cylinder having a screw-threaded outer surface, a lock case adapted to be mounted within a closure and provided with a screw threaded opening into which said cylinder is threaded and a slot in communication with said opening, a dog mounted in said cylinder for movement transversely thereof and adapted to be projected into and retracted out of said slot, and key-operated, pin-tumbler controlled means for projecting and retracting said dog into and out of said slot.