US2426041A - Panic lock - Google Patents

Description

Aug- 19, 194 J. H. MOORHOUSE '7 PANIC LOCK Filed Dec. 8, 1943 3 Sheets-Sheet l INVENT OR.

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1947- J. H. MOORHOUSE ,0

' PANIC LOCK 1 Filed Dec. 8, 1943 5 Sheets-Sheet 2 Fig-1n (/01: n Moor/1 ouse Aug; 1947- J. H. MOORHOUSE 2,426,041

PANIC LOCK Filed Dec. 8, 1943 5 Sheets-Sheet 3 I 5, 4a 5a 38 55 o i i l 34- J Ill 1,, P I 5-17 UL INVENTOR. t/o/m MODr/IOUSQ Patented Aug. 19, 1947 UNITE-D STAT ES PATENT OFFICE PANIC LOCK John H. Moorhou se, Rochester, Y.

Application December s, 1942, Serial Norsiaa s i 18 Claims. (01. 292-164) The object of this invention is to provide a look that will keep a hinged door locked in the ordinary wa-y against being opened from the outside-which lock is also adapted to be used in combination with handle elements that make the combination act as a panic lock so that the door can be opened from the inside.

Another object of the invention is to provide handles that are used in combination with the above mentioned lock to release the look by being moving the bolt of the look so that the door can beopened.

Another object of the invention is to provide a lock with double acting handles on either or both sides of the door that can be either pushed or pulled for the purpose of moving the bolt of the lock and providing means that will prevent one of the handles from moving the bolt of the lock until a key has been turned in the lock which key will not of itself move the bolt of the lock.

Another object of the invention is to provide a lock with double acting handles on either or both sides of the'door'that-can beeither pushed or :pulled for the purpose of moving the bolt of the lock and providing means that will prevent one of the handlesfrom moving the bolt of the lock until a key hasb'een'turned'in the lock leaving the other handle free to'move the'bolt of the look by either pushing or pulling on the handle. Another object of the invention is to provide :a lock having any or all of the foregoing characteris'tics which can be used on'a door swinging either-outward or'inward or on a door hinged on the right or the left "of the look by merely reversing the position of the bolt and the sliding dog in the lock.

These and other objects of the inventionwill be illustrated in the drawings, described in the specification and pointed out inthe claims thereof.

In the drawings:

Figure 1 is a'front'eleva'tion of the lock and the plate and handle of the lock as they will appear when mounted on the inside of thedoor.

Figure 2 is an elevation of the'lock edge of the door showing the lock morticed into the door and the plates and handles on each side of the door.

Figure 3 is an-enlarged-detailedsectional view of 'the lock edge of the door showing the han- .dles on each side of-the door.

Figure 4 is aisection on the line la-4x of Figure 3 looking downinfthedirection of the arrow.

Figure 5 is 'a side elevation of the lock casin and mechanism insidethereofafter it is removed from the door and. with the cover :plate broken away, the view being taken fromthat side of the lock which would appear on the inside-of the door if the door was transparent *with the bolt in its normal position locking the door against beingo'p'ened.

Figure 6 is adetail view of the lock as'shown in Figure 5 with the bolt withdrawn by the movement of the inside handle, it also being understood that the keyhole plate is sectioned away to show the parts inside of the lock that are nor- 'mally concealed thereby and itwill also be understood that Figure, 6 shows themovement of the bolt by the handle without the use of the key.

Figure '7 is a detail view ofthe lock as shown in Figure 6 with the parts first moved by the turning of the key after whichthe bolt has been withdrawn by the movement of the outside ham dle.

Figure 8 is a detailview of the key that Works in connection withthe slides or tumblers shown in Figure 9 to release the sliding dog.

Figure 9 is a sectional view through the slides or tumblers thatare moved by. the key, the section being taken onthe line 9x 91: of Figure 6 looking down in the. direction of the arrow.

Figure 10 is a front elevation of the,lower,part of the inside of the door sh'owing a floating-panel therein to which is connected the handle of the locksothat'the lock will be operated by pressure onithe panel.

, Figure 11 is 'a-section through the lock on the line I I a:-'l'l:c of Figure '5.

Figure 12 is a section through'th'e lock onthe linel 213-4256 of Fi'g'ure -6.

Figure 13 is a perspective'view of the yoke 38.

Figure 14 is a perspectiveview of the yoke 35.

'Figure15is a planview of the sliding dogf39.

Figure v16 is a diagrammatic view 'of the door with the hinge on the inside so that the door will open inward.

Figure 17 is a diagrammatio view of the door with the hinge on the outside so that the door pushes out, the bolt 34 being shownin reverse position from the position of the bolt shown in Figure -16.

In the drawings like reference numerals indicate like parts.

In the drawings reference numeral I indicates an ordinary door that is mounted to swing on hinges. It may swing either in or out. 2 indicates the panel plate of the lock on the inside of the door and 3 indicates the panel plate of the lock on the outside of the door. 4 indicates the handle on the inside of the door and 5 indicates the handle on the outside of the door. The handle 4 is connected to a hinge plate 6 at the top and the handle 5 is connected to a hinge plate I at the top and these plates 6 and I are fastened directly to the door by screws and the handles 4 and 5 swing thereon with a limited motion. The door is morticed at 8 to receive the lock 9 which look will presently be described.

The handle 4 is preferably a metal casting having a grip opening ID therein by which it may be grasped to pull it either out or in, the outer position being shown by dotted lines and the inner positions being shown by full lines in Figure 3.

The handle 5 is shown in intermediate or in normal position; On the inside of the handle 4 is a lug II which extends into a recess I2 formed in the door. Extending downward from the inner end of the lug I I is a projection I3 integral therewith, the purpose of which will presently be described.

On the bottom of the handle is a forked extension I4 which extends into a recess provided in the door therefor. The purpose of the projection I3 and the forked extension I4 will presently be described.

Pivotally mounted on the door is a lever [5 of the first class, the upper end of which lever is engaged by the projection l3 when the handle is pulled out and the lower end of which is engaged by the lower end of the handle when the handle is pushed in. The forked extension I4 of the lower end of the handle straddles the lever l5, and thus assures engagement therewith and also guides the movement of the lever I5. Whether the lever I5 is moved by force applied at the top or bottom, the movement of the lever is the same and the effect of the movement of the lever on the mechanism of the lock hereinafter described is the same, whether the handle 4 is pulled out or pushed in. In this sense it is double acting.

On the handle 5 is a lug Ila, a projection I31; and a forked extension Ma all of which correspond to the parts II, I3 and I4 above described on the handle 4. A lever I50. is also provided which corresponds to the lever I5 above described except as herein described otherwise. It will also be understood that whether the handles 4 and 5 are pulled out or pushed in, they move the levers I5 and I5a in the same way and for the same purpose that will be presently described. It will also be understood that the recess I2 is cut into the door on both sides thereof.

In Figure 5 I have shown a lock having a casing 30. On the front of this casing is a face plate 32 fastened thereto. Inside of the casing is a stationary housing 33 through which slides the bolt 34. The housing is wider than the bolt so as to provide room for the springs that move the bolt in one direction; namely, in the direction to lock the door. The housing is cut away at the back so that the bolt can extend through it and beyond it.

At the front of the housing 33 is provided a yoke 35 which covers the bolt 34 and the springs on top. This yoke has extensions 35a-35a extending downwardly therefrom on either side of the bolt against which extensions bear the forward ends of the springs 36 and 31. The springs 36 and 3'! are placed on either side of the bolt and at the forward end are held in place by the yoke 35 which covers them at the forward end. These springs bear against the downwardly turned extensions 35a35a. This yoke is removable and moves back and forth with the bolt 34. Through this yoke the thrust of the springs 36 and 3' I is communicated to the bolt.

At the rear of the housing 33 is provided a yoke 38 having downwardly turned extensions 38a against which the rear end of the springs 36 and 31 bear. This yoke is stationary and removable, and is merely a convenience in that it holds the springs down.

Extending forwardly from the yoke 38 are fingers 38b'38b which extend forward over the springs 36 and 31. These fingers are placed low enough so that when the yoke 35 is moved back with the bolt it slides over these fingers, and is arrested by the top cross piece of the yoke 38. Back of the housing 33 is provided a sliding dog 39 which is channel shaped. The bolt 34 moves with the sliding dog or independent of it according to circumstances that will now be described.

The bottom of the sliding dog is cut away in the web at the forward end of the channel to form a slot as indicated at 40. A slot 4| is cut in the back plate of the casing 30 and a similar slot 42 is cut in the cover plate 3| of the casing. These slots 4| and 42 are somewhat longer than the travel of the bolt 34.

A similar long slot is provided in the bolt 34. These slots in the front and back of the casing and in the cut away portion of the dog and in the bolt are all in line with each other so that a finger can extend through them from either side of the casing into engagement with the slot in the bolt, the purpose of which finger is to move the bolt and wil presently be described. This lock is provided with a keyhole 43 on the outside of the lock and a key 44 can be inserted and turned in said keyhole, but the key does not move the bolt in the look, but merely moves tumblers 45 that release the sliding dog 39 so that the sliding dog 39 can be moved with the bolt. As long as the tumblers 45 remain in the position shown in Figures 5 and 6 the sliding dog 39 cannot move, but when the tumblers 45 are moved from the position shown in Figures 5 and 6 to the position shown in Figure '7 then the sliding dog can be moved and will be moved if the outside handle 5 is moved but as long as the sliding dog is locked against movement by the tumblers 45 the bolt 34 cannot be moved by the handle 5 but can only be moved by the handle 4; the effect of handle 4 on the bolt is independent of the sliding dog 39. When the key 44 is removed the lock becomes a spring lock again and locks the door automatically from being opened from the outside. The door remains unlocked at all times from the inside.

As shown in Figure 9 six tumblers 45 are shown together at the left and these tumblers form a pattern or combination that are moved simultaneously by the key shown in Figure 8. For each tumbler a walking beam or teeter-totter 46 is provided pivoted at 41. For each of the teetertotters is provided a weight 48 which normally counterbalances the tumblers 45 and holds the tumblers normally in the raised position shown in Figure 6 locking the sliding dog 39. When the key is turned pushing the tumblers down the wei hts 48 a e aised to t e siti show in Fi ur and as oon as the key is withdrawn the weight 48 are free to drop and they will drop and raise the tumblers 45 and lock the slidingdeg 39 in its forward position, as soon as the bolt 34 and the sliding dog 39 return to their forward position, it being understood that the springs 36 and 3-1 will push the bolt 34 and the sliding dog 39 forward momentarily depressing the tumblers 45 by the cam action shown, after which the tumblers rise and lock the sliding dog 39 in its forward position without locking the bolt.

Between the tumblers 45 and the weights 48 shown in Figure 9 is a combination. of six stationary plates 56 which are cut away in curves of different radii to form a combination which will permit the proper key to turn therein to move the tumblers 45 which key must both fit the curves in the stationary plates and the tumblers tohave the desired effect of moving the tumblers to release the sliding dog 39. The plates and the tumblers and the key may be varied to form different combinations but each key must be shaped to properly coordinate with the stationary plates and the tumblers to secure the desired result.

As shown in. Figures 1 and 2, on the inside of the lock is provided a handle 55 which is mounted to turn in the plate 2 and has a shank or stem which extends through the plate and is provided with adog 56 which is substantially like a blank key. The tumblers 45 are provided at the bottom with extensions 51 which are engaged by the dog 55 and are all depressed simultaneously thereby; so that the turning of the handle 55 on the inside of the door from the position shown in Figure 1 will release the sliding dog 39 the same as it would be released by the turning of the key 44 from the outside. If the dog 55 is turned down at right angles to the position shown in Figure 6 it will hold the tumblers 45 down permanently so that the door can be opened freely from the outside, it being understood that the bolt 34 moves with the inside handle 4 without moving the sliding dog 39 and moves with the sliding dog 39 when the outside handle is moved and if the tumblers 45 are held down permanently there is no restriction on the movement of the sliding dog 39 and the door can then be opened from the outside. These tumblers, walking beams and counterweights are all embodied in a separate housing of their own. On both sides of this housing are the two key holes shown in Figures 5, 6 and 7.

The connection between the handles 4 and 5 and the bolt 34 and the mechanism by which the handles cause the movement of the bolt will now be described.

The lock casing 39 with its coverplate 3| is inserted in a suitable mortice in the door which mortice is shown in Figures 2 and 3. Each side of the door is cut away to permit the insertion into the casing of the lock on each side of one end of a small housing 58 and SI. The housing 60 is inserted from the ouside of the door and the housing 61 is inserted from the inside of the door. The end of each of these housings are nested into a suitable recess in the casing on one side of the lock or its front coverplate in the other side of the lock.

Each of these housings 65 and Bi carries a dog 62 and 63 pivoted therein. Each dog has an extension or finger 62a and 63a thereon. The finger 62a extends through the slot 4! in the 6 back f he c cas n 30 nd ou h. t slot at in the sliding dog 39 and into the slot 34;: of the sliding bolt 34. The finger 63a extends through the slot 42 in the coverplate 3| and into the slot 34a of the sliding bolt.

The finger 63a does not engage in the slot 49 of the sliding dog 39 and therefore is not controlled by the sliding dog 39 and the handle which moves it is free to move the bolt 34 at all times. The finger 6211 does engage in the slot 49 in the sliding dog 39 and cannot move the sliding; bolt 34-unless it can also move the sliding dog 39,at the same time, and the movement of the sliding dog 39, at thesame time, and the movement of the sliding dog 39 is dependent in turn on the use of the key 44 shown in Figure 8 which must pull the tumblers 45 down from the position. shown in Figure 6 to the position shown in Figure 7 which releases the'sliding dog 39 so that it can move with the bolt 34. Therefore the handle 5 cannot move the bolt and dog without the use of the key 44 shown in Figure 8. Each of the housings 60 and 6 is-cut away at its-outer end to form a recess to permit the ends of the levers l5 and |5a to engage therein and by which the movement of the levers isguided. These levers l5 and Ilia engage with the short arms on one side of the dogs 62 and 63 and swing the dogs. to move the bolt 34,.it being understood that the lever 15 connected with the handle 4 on the inside of the door moves the sliding bolt 34 independent of the sliding dog 39 while the lever l5a. cannot move the sliding bolt 34 as long as the tumblers 45 hold the slidingv dog. 39 against movement as above described.-

As shown in Figures 11 and 12 one side of each of the dogs 62 and63-iscut away with a V-shaped recess leaving a V-shapedshoulder at the side of the recess. The lower end of each of the levers l5 and [5a is also formed with a V-shaped recess and with a V-shaped shoulder at the side of the recess; The V-shaped'shoulder on the lever I5 is adapted to nest in the V-shaped recess in the side of the dog 53 and the V-shaped-shoulder formed on the side of the dog 63- at the side of the V-shaped recess is adapted to nest in the V-shaped recess in the lever [5 by which the dog 63 andthe end of the lever are interlocked with each other. In this way the movement of the-lever [5 or I5! is communicated toits dog and is limited so that it camiot jam while it moves the bolt 34. V P

It will also be understood that the finger of the lower dog 63-is cut away on top and the finger of the up er dog 62 is cut away on thebottorn so that these two fingers 63a and 62a will bypass each other while remaining in engagement with the slot 34a in the bolt 34.

It will also be understood that the handles 4 and 5 normally stand in mid position as is shown in'F-igure 3 by the position of the handle 5 and either handle can be pushed in as shown by the full line position of the handle 4-or can be pulled out'as shown by the dotted line position of handle 4 in Figure 3.

The handles-4 and '5 are normally held in mid position as is shown by the position of the handle 5 in Figure 3 by the springs 33 and 31 shownin Figure 5. Whenthese springs are expanded-, -the dogsBZ and-63 must occupy the position shown in Figure 11 and in this position the levers l5 and Ilia will occupy the position in which the lever l5c is" shown in Figure 3 and this in turn will hold the handles 4 and'5 in the position shown' oc upied y t e-hand1e-5 in Fi ure 3.

7 This is dueto the fact that the upper end of the lever la bears against the lug I3a and pushes it inwardly and the lower end of the lever I5a bears against the lower end of the handle 5 and pushes it out, and between the two ends of the lever the handle -5 is held in mid position as long as the springs 36 and 31 are expanded and as long as the dogs 62 and 63 occupy the position shown in Figure 11.

The lever |5a can only move clockwise. It can be moved counterclockwise only by breaking the handle 5. The converse of this is true with regard to the lever I5 and the handle 4. The lever [5 can only move counterclockwise and cannot move clockwise without breaking the handle 4.

The lever 5 and the lever I5a constitutes a compound lever that operates the dog 62 and the lever 4 and lever l5 constitutes the compound lever that operates the dog 63 and either of the dogs when operated by their respective compound lever will withdraw the bolt 34 to the position shown in Figure 12 from the position shown in Figure 11 in which it is normally held by the springs 36 and 31.

It will also be understood that the dogs 62 and 63 are not pivoted in the middle but ar pivoted at one end and are operated as levers of the third class to move the bolt.

As above pointed out the lock is provided with double acting handles on both sides of the door and either of these handles can be pushed or pulled for the purpose of moVing th bolt 34 of the look so that the door can be opened. The sliding dog 39 is provided on the outside of the lock (that is on the outside of the door) and this sliding dog 39 will prevent the handle on th outside of the door from moving the bolt 34 until the key 44 has been turned in the look. This leaves the handle 4 on the inside of the door free to move the bolt 34 of the lock by either pushing or pulling on the handle. It will also be understood that the door containing this look can be hinged on the inner corner as shown in Figure 16 so that the door will swing inward or the door can be hinged on the outer corner as shown in Figure 17 so that th door will swing outward. In the assembly as shown in Figure 16, the bolt 34 must be positioned to lock the door against swinging in and in the assembly shown in Figure 17 the bolt must b turned over 180 on its long axis to hold the door against swinging out. In each case, the cam on th end of the bolt that strikes on the plate ordinarily used on the door casing must approach it so that the bolt 34 will be moved thereby until the door closes and then the fiat side of the bolt must engage in the hole always provided in the plate in the casing to hold the door positively closed.

In Figure I have shown a large floating panel 10 hinged at the bottom and having a slight in and out movement at the top. This panel has a bracket I I thereon which engages with the handle 4 so that the handle moves by pressing on the panel. Such a panel would ordinarily be used on the door hinged as shown in Figure 1'7. In either assembly shown in Figure 16 or 17 the sliding dog 39 would always be in the position shown in Figures 11 and 12, but if the hinges are placed on the right of the doors instead of the left as shown in Figures 16 and 17 and the locks are placed on the left of the doors then the sliding dog 39 must be turned over 180 on its lone axis from the position shown in Figures 11 and 12. This places it again on the outside of the door where it must be in order that it will function in controlling the lock against being opened from the outside, but it will still permit the lock to 'be released from the inside. This is due to the fact that the sliding dog 39 must always be on the outside of the look. In such case the cover plate 3| must be on the outside of the door and it must be provided with the same two key holes that are provided in the lock casing and in the housing for the tumblers. The same relative position of the parts will be observed if Figures 16 and 17 are turned up side down and the reference numerals are replaced thereon.

In that case the handle 4 becomes 5 and the handle 5 becomes 4.

It is also pointed out that the hinges on the panel 10 as shown at the bottom of Figure 10 can also be placed on the left hand side of the panel; that is, the side opposite to the bracket 'II and opposite to the lock on the door in which case the three-cornered restraining members which are shown at the top of the panel in Figure 10 would be placed one at the upper right hand corner of the panel and the other at the lower right hand corner of the panel. The movement of the panel would effect the bracket "H the same as above described. In this respect the position of the hinges on the panel would correspond to the position of the hinges on the door as shown in Figures 16 and 1'7 I claim:

1. A look having a housing, a bolt mounted to slide therein, a slot in the side of the housing, a slot in the bolt, the slot in the bolt and the slot in the housing being partly in line with each other when the bolt is in extended or looking position, a dog pivoted at the side of the housing and adapted to engage in the slot in the bolt, said dog being adapted to swing to move the bolt back from locln'ng position, a sliding dog mounted on one side of the bolt, the pivoted dog being adapted to engage with and move the sliding dog and the bolt, tumblers adapted to engage the end of the sliding dog and hold the sliding dog and the pivoted dog against movement.

2. A look having a housing, a bolt mounted to slide therein, a slot in the side of the housing, a slot in the bolt, the slot in the bolt and th slot in the housing being partly in line with each other when the bolt is in extended or looking position, a dog pivoted at the side of the housing and adapted to engage in the slot in the bolt, said dog being adapted to swing to move the bolt back from locking position, a sliding dog mounted on one side of the bolt, the pivoted dog being adapted to engage with and move the sliding dog and bolt, tumblers adapted to engage the end of the sliding dog and hold the sliding dog and the pivoted dog against movement, but permitting the bolt to slide relative to the sliding dog.

3. A lock having a housing, a bolt mounted to slide therein, a slot in the side of the housing, a slot in the bolt, the slot in the bolt and the slot in the housing being partly in line with each other when the bolt is in extended or looking position, a dog pivoted at the side of the housing and adapted to engage in the the slot in the bolt, said dog being adapted to swing to move the bolt back from looking position, a sliding dog mounted on one side of the bolt, the pivoted dog being adapted to engage with and move the sliding dog and bolt, tumblers adapted to engage the end of the sliding dog and hold the sliding dog and the pivoted dog against movement, means to withdraw the tumblers from engagement with the 9 sliding dog to permit the movement of the sliding dog and the bolt by the pivoted dog.

4. A lock having a housing, a bolt mounted to slide therein, a slot on each side of the housing,- a slot in the bolt, the slot in the bolt being partly in line with the slots in the housing when the bolt is in extended position, a dog pivoted at each side of the housing and adapted to engage in the slot of the bolt, each of said dogs being adapted to swing to pull the bolt from extended position, a sliding dog mounted to slide at one side of the bolt, the pivoted dog on that side being adapted to engage with and move the dog and the sliding bolt, tumblers adapted to engage the end of the sliding dog and hold the sliding dog and pivoted dog against movement, said sliding dog being adapted to be placed on the other side of the bolt for the purpose of being engaged by the pivoted dog on that side, the sliding dog being adapted to hold the pivoted dog against movement as long as it is engaged by the tumblers.

5, A lock having a housing, a bolt mounted to slide therein, a slot on each side of the housing, a slot in the bolt, the slot in the bolt being partly in line with the slots in the housing when the bolt is in extended position, a dog pivoted at each side of the housing and adapted to engage in the slot of the bolt, each of said dogs being adapted to swing to pull the bolt from extended position, a sliding dog mounted to slide at one side, of the bolt, the pivoted dog on that side being adapted to engage with and move the dog and the sliding bolt, tumblers, tumblers adapted to engage the end of the sliding dog and hold the sliding dog and pivoted dog against movement, said sliding dog being adapted to be placed on the other side of the bolt for the purpose of being engaged by the pivoted dog on that side, the sliding dog being adapted to hold the pivoted dog against movement as long as it is engaged by the tumblers, the bolt being capable of movement relative to the sliding dog when moved by the pivoted dog that is located opposite to the sliding dog.

6. A look having a housing, a bolt mounted to slide therein, a slot on each side of the housing, a slot in the bolt, the slot in the bolt being partly in line with the slots in the housing when the bolt is in extended position, a dog pivoted at each side of the housing and adapted to engage in the slot of the bolt, each of said dogs being dapted to swing to pull the bolt from extended position, a sliding dog mounted to slide at one side of the bolt, the pivoted dog on that side being adapted to engage with and move the dog and the sliding bolt, tumblers adapted to engage the end of the sliding dog and hold the sliding dog and pivoted dog against movement, said sliding dog being adapted to b placed on the other side of the bolt for the purpose of being engaged by the pivoted dog on that side, the sliding dog being adapted to hold the pivoted dog against movement as long it is engaged by the tumblers, the bolt being capable of movement relative to the sliding dog when moved by the pivoted dog that is located opposite to the sliding dog, means to withdraw the tumblers from engagement with the sliding dog to permit the movement of the sliding dog and the bolt by either of the pivoted dogs.

7. A look having a housing, a bolt mounted to slide therein, a slot in the bolt, a dog pivotally mounted at the side of the housing and extending through the housing and adapted to engage in the slot in the bolt, said clog being adapted to swing to move the bolt back from looking position, a lever on the outside of the housing one end of which is adapted to engage with the dog and cause it to swing to move the bolt back from locking position, said lever being'a lever of the first class, a handle pivotally mounted and making engagement with each end of the lever in such manner that when the handle is moved either in or out it will move the lever to swing the dog and withdraw the bolt, a dOOr on which said lock is mounted, said door having a panel therein which panel is hinged to the door at one edge of the panel, a bracket on the panel which bracket engages with the handle and is adapted to cause the bolt to be released when the panel is moved by pressure.

8. A look having a housing, a bolt mounted to slide therein, a compound lever on each side of the look by either of which levers the bolt can be operated without moving the other lever, means inside of the lock for preventing the movement of either one of the levers without holding the bolt itself against movement leaving the other lever free to move the bolt, said means being also adjustable to release both levers for movement of the bolt, each ofsaid levers operating to withdraw the bolt when the lever is either pushed or pulled.

9. A lock for a door, a bolt mounted to slide in said lock, means in said lock adapted to hold the bolt in extended position, a dog pivotally mounted and adapted to engage said bolt to withdraw the bolt, a compound lever, one end of which is adapted to engage andmove the dog and the other end of which serves as a handle for moving the lever and the dog, said handle being adapted to move the dog when moved either in or out from a central position.

10. A lock for a door, a bolt mounted to slide in said lock, means in said lock adapted to hold the bolt in extended position, dogs pivotally mounted and adapted to engage with said belt, a handle pivotally mounted on the outside of the door and normally standing in, mid position and being adapted to swing from said mid position either toward or away from the door, means con necting said handle to said bolt by which the first named means in the lock holds the handle in mid position, said means being adapted to cause the handle to withdraw the bolt from extended position when the handle is moved either in or out from its mid position.

11. A look for a door, a bolt mounted to slide in said look, a pivotally mounted dog for operating said belt, a lever of the first class mounted outside of the lock, one end of which is adapted to engage with the dog and cause it to swing to move the bolt back from locking position, a handle pivotally mounted on the outside of the door and making engagement with each end of the lever of the first class in such manner that when the handle is moved either in or out it will move the lever to swing the dog and withdraw the bolt.

12. A lock for a door, a bolt mounted to slide in said look, a pivotally mounted dog for operating said bolt, a lever of the first class mounted outside of the lock, one end of which is adapted to engage with the dog and cause it to swing to move the bolt back from looking position, a handle pivotally mounted on the outside of the door and making engagement with one side of the lever at one end of the handle and making engagement with the other side of the lever near an intermediate point of the handle in such manner that when the handle is moved either in or 11 out it will move the lever to swing the dog and withdraw the bolt.

13. A look for a door, a bolt mounted to slide therein, springs on said bolt adapted to hold the bolt in extended position, dogs pivotally mounted and engaging with said bolt, a handle pivotally mounted on the outside of the door and normally standing in mid position, means connecting said handle to said bolt by which the springs in the lock hold the handle in mid position and by which the handle when moved either in or out from mid position will withdraw the bolt.

14. A look for a door, a bolt mounted to slide in said lock, a pivotally mounted dog for operating said bolt, a lever of the first class mounted outside of the lock, one end of which is adapted to engage with the dog and cause it to swing back to move the bolt from locking position, a handle pivotally mounted on the outside of the door and standing nearly parallel to said lever and making engagement with one end of the lever, with one end of the handle, and making engagement with the other end of the lever near an intermediate point of the handle in such manner that when the handle is moved either in or out it will move the lever to swing the dog and withdraw the bolt.

15. A look for a door, a bolt mounted to slide in said lock, a pivotally mounted dog for operating said bolt, a lever of the first class mounted outside of the lock one end of which is adapted to engage with the dog and cause it to swing back to move the bolt from looking position, a handle pivotally mounted on the outside of the door and standing nearly parallel to said lever and making a pushing engagement with one end of the lever, with one end of the handle, and making a pulling engagement with the other end of the lever near an intermediate point of the handle in such manner that when the handle is moved either in or out, it will move the lever to swing the dog and withdraw the bolt.

16. The combination of a door and a look therefor, said lock having a housing and a sliding bolt therein, said lock being mortised into the door from the edge thereof, means for operating said bolt, said means comprising a housing and a dog pivotally mounted therein, said last named hous- -;ing--being mortised into the dOOr through the side of the door and engaging with the side of the housing of the bolt, the housing of the bolt and the bolt each having a slot, therein through which said dog engages the bolt for operating it, slots in the housing of the dog, a lever moving in said slots and guided thereby for the purpose of moving the dog to operate the bolt, means on the door for operating the lever.

17 The combination of a door and a look therefor,'said lock having a housing and a sliding bolt therein, said lock being mortised into the door from the edge thereof, means for operating said bolt, said means comprising a, housing and a dog ivotally mounted therein, said last named housing being mortised into the door through the side of the door and engaging with the side of the housing of the bolt, the housing of the bolt and the bolt each having a slot therein through which said dog engages the bolt for operating it, slots in the housing of the dog, a lever moving in said slots and guided thereby for the purpose of moving the dog to operate the bolt, means on the door for operating the lever, said dog being mounted and moved as a lever of the third class.

18. The combination of a lock comprising a housing and having a bolt therein, means for operating the bolt, said means comprising a separate housing placed at the side of the lock, a dog pivoted at one end, the pivot therefor being placed near the corner of said last named housing, slots cut in the side of the last named housing, a lever guided by said slots, and engaging the dog at an intermediate point for the purpose of moving the dog to operate the bolt.

JOHN H. MOORI-IOUSE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,092,225 Schreiber Sept, 7, 1937 1,479,602 Hayer Jan. 1, 1924 2,058,163 Malone Oct. 20, 1936 2,138,251 Lindstrom et a1. Nov. 29, 1938 874,793 Robinson Dec. 24, 1907 1,704,748 Kusch Mar. 12, 1929 1,558,980 Halinka Oct, 27, 1925 1,565,212 Sillick Dec. 8, 1925 1,800,707 Wartian Apr. 14, 1931

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