US1929753A - Lock - Google Patents

Description

Oct. 10, 1933- e E. MAXWELL ET AL LOCK Filed July 21. 1950 2 Sheets-Sheet 1 INVENTORS.

W -V. QWTTORNEY.

Oct. 10, 1933.

G. E. MAXWELL ET AL LOCK Filed July 21. 1930 2 Sheets-Sheet 2 1NVENTOR5 W w u- W W 4/. ATTORNEY.

Patented Oct. 10, 1933 OFFICE LOCK George Edson Maxwell, Englewood, and Edward 1 Anderson, Denver, Colo.

Application uly: 21, 1930. Serial No. 469,339.

8 Claims.. (01. 7029) 1 Our invention pertains to door, lock. sets and in the on position and with the night lock catch H more especially to gravity door lock sets.

The object of our invention is to provide door lock set that shall function throughout by gravity and without the usual springs.

A further object is to provide such a lock set with a non-pickable key-lock whose tumblers are operated-by gravity and are without springs.

A further object is to provide a lock set having a night look by which the lock may be looked as positively and safely as with the key lock, and which may be unlocked by the proper key.

A further object is to provide a door lock set having a night lock with a catch, which when set will make it impossible to unlock the lock even with the proper key.

A further object is to provide such a lock set in which either a common turning knob, or a thumb lever, or both, may be usedon the same look at the same time, with both able to function independent of the other.

A further object is to provide a gravity-operated door lock set in which the striker is so constructed as to hold the latch-bolt in the open position for a predetermined distance of its travel during which it will not be in motion but will be ready to drop into the slot and will there- 'fore fall and latch the door even whenit is violently slammed. v

A further object is to provide such a door lock set having all the above features and in which the latch-bolt acts as the bolt and locking the latchbolt against movement locks the door.

i A further object is to provide a lock in which allthe above features'are combined and which -may be made asdifficult to' pick as thehighest construction that is-cheap priced looks with a 'to manufacture. I

Our invention is described more in detail herewhich;--

Figure l showsour door lock set and a portion f of the door and frame, in partial section, the latch-bolt being closed, but the night lock in the off position.

Figure. 2 shows fragmentary striker. I

Figure 3 shows a to the right.

elevation of the to the left. i I

Figure 5 is a detail showing the'lock unlocked but the night lock in the on position.

' Figure 6 is a detail showing the night .lock

inafter and is illustrated in the drawings, in

.:be made as shown or in anyof the otherwell detail with the knob turned Figure .9. Figure 4 shows a detailwith theknob turned A set V 7 I Figure 7 is a partial section showing the thumb lever.

Figure 8 is a detail ofthe .night. lock gravity lever and shaft. a

Figure 9 is a detail of the locking lever. Figure 10 is a detail of the gravity tumbler. Figure 11 is-aside view of the key. The gravity latch-bolt 2, pivoted on the case .5

10 and cover 11 by the pin 3 contacts the striker 1 at about the point A of Figure 2 with its contact face 2'. The latch-bolt 2 is moved upward about the pin 3-as a center, the face 2 following the dotted curve D of Figure 1. The-.face2f at the same time'follows along the striker l as indicated by the dotted line of Figurei2, till it .has raised its outer corner to the pointD of Figure 1. This permits the latch-bolt 2 to travel along the dotted line B of Figure2till it may drop into striker slot as at 0. During the time the latch-bolt moves along the dotted line B it. is

stationaryv with respect to its pivot pin 3, and

hence it is ready to at once drop into the slot of the striker 1 when it is reached. That is, this period of rest along. the line B gives time. for any inertia effect to be overcome which may have square aperture for the reception of the knob shaft 26. The roll-back 6 if turned vtothe right contacts the face4 and if. turned to. the left contacts the face .5 in either case raising or .tend- -9 ing to raise -the latch-bolt 2,,about its pivot pin 3. The thumb lever '7. whichfits through the slots 8 inthe-lplates '8, may contact the gravity latch-bolt 2 as at K through anopening through the case 10 and cover 11. It will be'seen that either lifting or depressing either end offthe thumb lever-Twill raise or tend to raise the gravity latch-bolt 2. [Either end of the lever 7 'may knownforms for such a lever.

The toggle 13 is", pivoted to thegravity latchbolt 2 by'the pin 12. -.The dog 14 is pivoted in the .case 10 and the cover 11 by its'hubs .14, and is provided with the toggle-receivingslot l4. See

x05 When the key operated tumbler 20 is in the un- I locked position as in Figure 5, and the night lock is ofi,th at. is, in the dotted line position shown Y in Figure 5, the gravity latch-bolt 2 may be raised byeither the knob 25 or the-thumb lever 7 ,.-the

fit is as safe as a bolt lock.

toggle then passing freely through the slot 14" of the dog 14. When the key operated tumbler 20 is in the unlocked position shown in Figure 5, with the night lock on, as shown in full lines, then the dog 14, by means of the toggle 13, prevents the raising of the latch-bolt 2 by either the thumb lever 7 or the knob 25.

When the look is in the locked position as shown inFigure 1, the dog 1% will always be in the position shown, and if the gravity lever is as shown at 15, the proper key may unlock the key tumbler 20 and place it in the position shown'in Figure 5, by moving the gravity tumblers 18 to register with the holes 20' so that pressure of the key on the face 20" will move thekeyoperated tumbler 20 downward along the gravitytumblers 18; the positions of the levers 1 1 .and 15 being shown by dotted lines in Figure 5.

The toggle 13 will follow the key operated tumbler 20 in its downward movement and may then move freely through the 510d] 14" of the locking lever 14 as before and permit the raising ofthe latch bolt 2, -by-either the knob 25 or the thumb lever 7.

If, however,the-night-tumbler gravity lever 15 is in the on or locked position shown at 15' in Figure Land the key lock 20 is locked asshown in Figure 1, then, when the key unlocks the tumbler 20, the dog 14 and the lever 15 will follow the tumbler 20 downward with the toggle 13 to the full line position shown for the '.dog 14 -and the lever '15 in Figure 5. That is, when the night lock is on, and the key lockis locked, the key will unlock the key look but will not unlock the night lock and hence the latchbolt .2 can not be-raised. In order to get in, in

sucha caseythehouseholder will then have to lock the key look by a quick snap of the key.

which will raise the tumbler 20 so quickly that the inertia of the lever 15 will throw it over the 'center'to the position shown at 15 in ,Figure 1 and the night lock will remain in the "dotted line position shown in Figureg5, so that the toggle 13 will pass through the slot 14 of the dog and permit the latch-bolt 2 to be raised after tumbler 20 has been retracted.

If :however it is desired to prevent operation of the look by 'a key from the outside, the lock may be put in the unlocked position shown in Figure 5, and the night lock set in the on position, and the 'catch 23 may then be moved till its flange 23 is :over the ball of the gravity lever 15. Thus, though the key lock is in the unlocked position, the latch-bolt 2 is positively locked by the night lock and its catch, and no key nor pick can unlock it. In other words It will be noted that the tumbler weights 19 are slightly recessed asyshown by the cavity 18". The hole '18 of the gravity tumbler is a free fit on the tumbler pivot 22, so that the gravity tumblers 18 will normally hang out of line with the holes 20 both radially and aX'ialIy so' that any key in order to operate the lock will have to position the tumblers in both directions.

The gravity lever shaft 16' has a flange 16' which bears against the inner face of the adjacent plate 8, thus holding the shaft 16in the square hole of the dog 14. The shaft 16 is also provided with a slot 16" for the reception of the retaining pin 1'7. The slot 16" permits a 3 predetermined amount of movement between the shaft 16 and the lever 15, while retaining the lever 15 on the shaft 16. The reason for this relative movement of lever and shaft is that in order to get over the center the lever 15 must have more angular movement than would be provided by a tight connection with the dog 14.

The key 28 has two tumbler notches which gather and direct the gravity tumblers from any position and line them up with the holes 20'. The heel 19 limits the angular movement of the :gravity' tumblers when the lock is looked, as shown in Fig-urel.

There is one gravity tumbler on each side of the tumbler 20, both of them mounted on the pivot 22. The free fit of the gravity tumblers on the pivot 22 and the uneven distribution of weight 19 will cause the gravity tumblers to fall over sidewise till stopped by the tumbler 20 or the case 10 or cover 11, The distribution of weight in the-weights 19 may vary if desired to throw the gravity tumbler to either one side or the other.

The tumbler notches of the key 28 must have sides 30 wide enough to gather the gravity tumblers l8 regardless of their position and by centering'thein in the bottom of the notches'line them up axially on the pivot 22 with the holes 20'; and the depth of the notch bottoms 29 must be such as to line up the gravity tumblers angularly with the holes 20'. That is, the key must line up-the gravity tumblers not only axially but radially in order to unlockthe lock.

It will be seen from this, and from the fact that the two gravity tumblers 18 are separated by the tumbler 20, that our lock is one that can not be picked. The fit of the gravity tumblers 18 in the holes 20 is in fact so close that even the key 28 must be made very accurately or it will not unlock the look.

It will now be seen that we have attained all the objects sought. That is, the lock operates entirely without springs, and by gravity; the latch will catch even when the door is slammed; the latch itself is locked by eitherthe key lock or thenight lock; the night lock may be set in the off position and the key lock maythen be locked and unlocked by the proper key; the night lock may be set in theon position, and if the key lock happens to be locked slowly, then the key lock must be unlocked by the key by first throwing off the night lockas explained-above, and then unlocking the key lock; the night lock may be put in the on position with the key lock unlocked, the key lock then looked quickly by the key which will throw off the night lock, and the key lock may then be unlocked; the thumb lever -may be used either with or without theusual knob; and the lock may be unlocked, the night lock set in the on position and the catch put on, and then no key can open the door.

Having now described our invention, what we claim as new and desire to protect by Letters Patent, is as fo1lows;-

1. In a gravity door lock, the combination of a case formed of co-acting parts to be mountedin a door, a gravity-operated latch-bolt having an exterior portion normally not in the case pivotally mounted in the case and having a hole adjacent said pivotal mounting provided with two converging curves located roughly between said exterior portion and said pivotal mounting, an arm pivotallymounted in the case and cover and received by said holeand provided with two curved faces ing curve in the latch into contact and thereby raise the latch.

2. In a gravity-operated door lock, the combination of a case formed of co-acting parts, a gravity-operated latch-bolt pivotally mounted in the case, manually operated means tending to raise the latch-bolt, a toggle pivotally mounted on the latch-bolt, a tumbler having a locked and an unlocked position and supporting the free end of said toggle, a dog pivotally mounted in the case and adapted to contact with said toggle and thereby prevent raising of said latch-bolt when the dog and toggle are aligned.

3. In a gravity-operated door lock, the combination of a case formed of co-acting parts, a gravity-operated latch-bolt pivotally mounted in the case, manually operated means tending to raise the latch-bolt, a toggle pivotally mounted on the latch-bolt, a dog pivotally mounted in the case and whose free end is adjacent the free end of thetoggle and has a raised and a lowered position, a manually operated tumbler having an upper or locked position and a lower or unlocked position and supporting the free end of said toggle, and gravity held, manually operated means carried by said dog, whereby when the free ends of both dog and toggle rest upon said tumbler, the contact between them will prevent raising the latch-bolt.

4. In a gravity-operated door lock, the combination of a case formed of co-acting parts, a gravity-operated latch-bolt pivotally mounted in the case, manually operated means tending to raise the latch-bolt, a toggle pivotally mounted on the latch-bolt, a dog pivotally mounted in the case and whose free end is adjacent the free end of the toggle and has a raised and a lowered position, a manually operated tumbler having an upper or locked position and a lower or unlocked position and supporting the free end of said toggle, and gravity held, manually operated means carried by said dog, whereby when the free ends of both dog and toggle rest upon said tumbler, the contact between them will preventraising the latch-bolt, and'a catch adapted to co-operate with said last mentioned manually operated means and hold the dog in the down position and the tumbler in the unlocked position.

5. The combination in a door lock of a case formed of co-acting parts, a key-operated tumbler having gravity tumbler receiving apertures and mounted for guided key-operated movement in-thecase, gravity tumblers to be received by the apertures of said tumbler and having a loose pivotal mounting in the case and provided with weights to throw the gravity tumblersnormally out of alignment with the tumbler apertures, a latch-bolt, and means co-acting with said lock to lock the latch-bolt against movement when the gravity tumblers are not in the tumblers apertures. I

'6. In a gravity-operated door lock, the combination of a case formed of co-acting parts to be mounted in a door,'a gravity-operated latchbolt pivotally mounted in the case, manually operated means to raise the latch-bolt, a toggle pivotally mounted on the latch-bolt, a tumbler having an upper or locked and a lower or unlocked position and supporting the free end of the toggle, a dog pivotally mounted in the case and adapted to contact with said toggle and thereby prevent raising said latch-bolt when the lever and toggle are aligned, and gravity-operated key-controlled tumblers mounted in the case and preventing movement of the tumbler from the locked to the unlocked position.

7. In a gravity-operated door lock, the combination of a case formed of co-acting parts to be mounted in a door, a gravity-operated latchbolt pivotally mounted in the case, manually operated means tending to raise the latch-bolt, a toggle pivotally mounted on the latch-bolt, a dog pivotally mounted in the case and having a shaft extending to the interior of the'door and adapted when aligned with the toggle to prevent the raising of the latch-bolt, gravityoperated means mounted on the dog shaft and having a locked and an unlocked position, and

means mounted on the door to maintain the last mentioned gravity-operated means in the locked position.

8. In a gravity-operated door lock, the combination of a case formed of co-acting parts to i be mounted in a door, a gravity-operated latohbolt pivotally mounted in the case, manually operated means to raise the latch-bolt, and looking means to prevent the raising of the latchbolt including gravity operated, key-controlled tumblers within the lock, and gravity operated lockable means on the inner side of the door and independent of said gravity tumblers.

GEORGE EDSON MAXWELL. EDWARD ANDERSON.

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