US2422224A - Lock lubricator - Google Patents

Description

June 17, 1947. J, CQNNELL 2,422,224

LOCK'LUBRICATOR Original Filed July 29, 1944 2 Sheets-Sheet l June17, 1947. J. A. CONNELL LOCK LUBBICATOR I Original Filed July 29, 1944 2 Sheets-Sheet 2 Patented June 17, 1947 LOCK LUBRICATOR John A. Connell, Carlsbad, N. Mex.

Original application July 29,

1944', Serial No.

547,180. Divided and this application July 13, 1945, Serial No. 604,833

Claims. (01. 70-464) The present application is a division of my application SerialNumber 547,180, filed July 29, 1944.

This invention relates 'topin-tumblerlockS, and more particularly to improvementsin locks of thi's-type-in which the stationary case or cylinder is provided with at least one series of driver pins, and the revolvable tumbler-carrier or core has a series of pins to cooperate therewith.

An object of the invention is to provide improved means for lubricating locks, such means including a lubricant chamber adapted to containpowdered graphite, for example, from which the lubricant is discharged by the action of the driver pins; so that it will be forced'to lubricate the parts each time akey is inserted and removed, or reciprocated back and forth in the keyway.

With the foregoing object outlined and with other objects in View which will appear as the description proceeds, the invention consists in the novel features hereinafter described in detail, illustrated in the accompanying drawings, and more particularly pointed out in th appended claims.

In the drawings:

Fig. l-is-a front elevation of a lock lubricated in accordance with the invention.

Fig. 2 is a side elevation of the same.

Fig. 3 is a rear elevation.

Fig. 4 is a plan view of one of the tenants keys.-

Fig. 5 is a-similar View of one of the managers keys corresponding to that tenants key.

Fig. 6 is a front elevation of a modified form of the lock, partly broken away, to illustrate a portion of the means employed to prevent the tenant from withdrawing his key except when the revolving core is in a certain position.

Fig. '7 is a plan view of a tenants key of the type to be used with the lock shown in Fig. 6.

Fig. 8 is a similar view of a managers key to be used with the lock shown in Fig. 6.

Fig. 9 is a longitudinal vertical sectional View on the line 9-9 of- Fig. 1, with the key removed.

Fig. 10 is a similar view after a tenants key has been inserted.

Fig. 11 is a longitudinal sectional view on the line |I-ll of Fig. 1, after the revolving core has been turned to bring the keyway into alignment with said line.

Fig. 12 is'a view similar to Fig. 11, but showing one-ofthe manage'rs keys in place of the'tenants key;

Fig. 13 is a transverse vertical sectional view takenon the line l3-l3 of Fig. 12.

Fig. 14 is a view similar to Fig. 13, but showing the revolving core in its normal position.

I will now describe the lock disclosed and claimed in my parent application and. afterwards, the novel lubricating means forming the subject of the present application.

Referring to the drawings, 15 designates astationary case or cylinder provided with abore l6 extending lengthwise thereof below its centeigfor the reception of a rotatable core ll having .an abutment flange H8 at the front of the lock and provided at its rear with a conventional bolt actuating member l9. As usual. the core is provid'ed with-a keyway or slot 28 communicating with a series of radially disposed holes 2! extending lengthwise thereof, for the reception of reciprocating pins 22, which cooperate with driving pins 23" arranged in a series of holes 24' disposed in a line extending lengthwise of the cylinder or case l5. As is cutomary, the drivers 23 are yieldingly urgedtoward the core by means of coil springs 25, positioned in the holes 24 and held in place by a slidable plate 2BWhich fits in a groove 21 extending lengthwise of the'periphery of the case.

In accordance with my parent invention, I arrange change-over elements or disks 28, 29;

30, 31, and-32, betweenthe pins 22' and the-drivers 23, except between the last driver 23a ofthe series and the pin with which it cooperates.

In the cylinder or casing of sucha look, I place one o more additional seriesof holes 33', 34 for the reception of one ormore additional sets of drivers 35, 3'6, but in the form of the in- Vention shown in Figs. 1, 2, 3, and 9 to 14, inclusive, it will be noted (Figs. 11 and 12) that theholes 33, 34 are less in number than the pin holes 2| of the rotatable core. This is for the purpose of preventing withdrawal-of the tenants key except when the keyway 20 is in the same plane as the holes 24.

Referring now to Fig. 9, it will be noted that with the key out of the slot, drivers 23, 23a normally extend across the junction between the periphery of the core I! and the surface of the bore l6, so that the core cannot be turned. If, however, the tenant inserts his key 31 (Fig. 10), the serrated edge 38 thereof will lift the pins 22 and disks 2-8 -32 into a position to allow the core to be turned by the key for actuating the bolt-operating membe 19; However, Whenever the rearmost pin 22, which is carried by thevcore moves to one side or the other of the line of holes 24, it confronts a solid portion of the case or cylinder, as indicated at 39 in Fig. 11. Therefore, the tenants key cannot b withdrawn, because the hump 40 at the inner end thereof is interlocked with the rearmost pin 22 of the core. Of course, it can be withdrawn whenever the keyway is aligned with the holes 24.

We will now assume that the manager, for one reason or another, desires to alter the lock in such a way that the tenant, although he may insert his key, cannot turn the core. Under such circumstances, the manager when the core is in the position shown in Figs. 1 and 3, inserts his first key 4| (Fig. 5) which corresponds with the tenants key 31, except that the hump 40 is omit-.

ted and a nose 42 is provided to raise the rear most pin 22 of the core. Hence, ager inserts key 4|, it will bring the parts into the position shown in Fig; 10. At this time, the core may be turned to bring the keyway into alignment with the holes 33. Whenthis position is reached, the manager withdraws his key 4| and such withdrawal is not interfered with, because the rearmost pin 22 of the core is not interlocked with this key. After such withdrawal, the manager inserts his second key 43 (Fig. 8) which key, let' us say, has a notch 44 for the front pin 22 of the core which is not as deep as the notch 45 of the tenants key 31 (Fig. 10) or the notch 45 of the first key of the manager (Fig. 5). Hence, upon the insertion of the key 43 (Fig. 12) the notch 44 will raise the front pin of the core to a higher elevation than the other keys so as to project the corresponding disk 28 into the front hole 33 of the case I5. He then turns the key in a counter-clockwise direction to return the keyway to the vertical position where it is in alignment with the holes 24; He then withdraws tenant attempts to open the look by means of the key 31, it will be clear that the front pin 22 of the core will drop into the notch 46, and as there is no disk 28 between this pin and its complementary driver 23, the latter will not be lifted to as great a height, but will obstruct the junction between the rotatable core and the case. Therefore, the tenant is prevented from opening the lock. Of course, the manager can readily open it by first using the key 43 to shift the keyway into alignment with the holes 33 before withdrawing this key and inserting his key 41 to effect the transfer of the disk 28 back into the front hole 2| of the core. Then, this key may be turned in a counter-clockwise direction to bring the keyway back into alignment with the holes 24 before they key 4| is withdrawn; It will be obvious that by varying the lengths o the pins 22, the drivers 23, or the thicknesses of the disks 28-32, and changing the profiles of the keys accordingly, numberless combinations may be obtained. Furthermore, a greater variety may be achievedby the employment of the second set of holes 34 and the drivers 36. I

Inst ad of employing a hump 40 at an end of a key to prevent withdrawal of the key except when the latter is in a particular position, I can use the structure illustrated in Figs. 6 and 7. In this embodiment, the cylinder- I 5a has secured to the front end thereof, a plate provided at its rear with a circular rabbet or recess 49 communicating with an entrance notch 50. When a tenants key 5| (Fig. '7) having 2. mg 52 thereon is inserted in such a lock, the lug 52 will move through the notch 50,-and then if thekey; is turned, the lock will enter the recess or groove when the manthe key 43. Now if the may be used with various types of locks, es-

pecially those having twov or more sets of driver pins in the case. In accordance with this divisional invention, one or more chambers 53 and r 54 are formed in the lock casing and each is connected by a passageway 54 with each of the driver pin holes 24. .Each chamber 53, 54, also communicates with the driver pin holes 33, 34 by means of ducts 55. The chambers 53, 54 are preferably charged with a powdered lubricant, such as graphite and, of course, they are closed by any suitable means, such as removable closures or plugs 56, Fig. 3, to permit recharging the same; With lubricant in the chambers 53, 54, it will be obvious that whenever the drivers 23 are reciprocated by the ordinary insertion and removal of the key, the drivers will act as pistons to force the lubricant into the holes 24, 3.3 and 34, from which the lubricant will travel to the rotatable core and to thepin holes 2|. For more positive lubrication, one may use either of r the managers keys 4|, 43, for example, when the pin holes 2| are aligned with either series of holes 33 or 34, and by moving the key back and forth several times can cause feeding of the lubricant. 1

From the foregoing, it is believed the construction, operation and advantages of my invention may be readily understood by those skilledin the art, and it is manifest that changes may be made in the details disclosed without departing from the spirit of the invention, as expressed in the claims. r

What I claim and desire to secure by Letters 3 Patent is: 7

1. In a pin tumbler lock of the type having a stationary case provided with at least one series of holes containing reciprocating drivers,and a rotatable core having a set of reciprocating pins adapted to register with said series of holes, the

improvement comprising a lubricant chamber positioned in the case and communicating with said 1 holes whereby reciprocation of the drivers will cause movement of the lubricant from the chamber to said holes; and a removable closure for the chamber to permit lubricant to be introduced into the chamber from the exterior of said case. f

3. In a pin tumbler lock of the, type having a stationary case provided with two series of holes containing reciprocating drivers, and a rotatable core having a set of reciprocating pins adapted .to register with either of the series of holes, the improvement comprising a lubricant chamber positioned in the case and communicating with said holes whereby reciprocation of the drivers will cause feeding of lubricant from the chamber to' 7 said holes.

core having a set of reciprocating pins adapted to register with either of the series of holes, the improvement comprising a lubricant chamber p0- sitioned in the case, containing a solid lubricant powder and communicating with said holes, whereby reciprocation of the drivers will cause movement of lubricant from the chamber to both series of holes.

5. In a pin tumbler lock of the type having a stationary case provided with a series of substantially radially arranged holes containing reciprocating drivers, a rotatable core having a set of reciprocating pins adapted to register with said series of holes, and springs in the holes for moving the drivers toward the core, the improvement comprising a lubricant chamber positioned in the case and communicating with each of said hole whereby reciprocation of the drivers will cause REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Upton Sept. 21, 1915 Number

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