US1168525A - Door-lock. - Google Patents

Description

W. A. LURIE.

DOOR LOCK.

APPLICATION FILED MAR. 10. 1915.

1,168,525. Patented J'an.18, 1916.

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W. A. LURIE.

DOOR LOCK. I

APPLICATION FILED MAR. 10, I9I5.

l 168,525. Patented J an. 18, 1916.

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THE COLUMBIA PLANOGRAPH 120-. WASHINGTON. n- C.

WILLIAM A. LURIE, 0F CI-IIGAGO, ILLINOIS.

DOOR-LOCK.

messes.

Specification of Letters Patent.

Patented Jan. is, rare.

Application filed March 10, 1915. Serial No. 13,325.

To a! Z whom it may concern Be it known that I, WVILLIAM A. Lunrn, a cltizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Door-Locks, of which the following is a specification.

My invention relates to door locks and may be considered as an improvement over th construction shown and described in my Patent No. 1,102,527, dated July 7 ,1914, and in my application Serial No. 8 15,6230, filed June 17, 1914:.

The object of the invention is to reduce the number of parts and to provide more simple and compact arrangement of the parts. 1

The inventionis of that class in which detent pawls are provided in the bolt head for preventing the bolt from being pried open. In the lock of myapplication referred to these pawls project beyond the bolt head when the bolt is in andmust drag across the edges of the bolt outlet opening particularly when the door is slammed. Such drag of course introduces friction and wear on the pawls and has the further dis advantage that outward. movement of the bolt would be impeded.

Another important object of my invention is therefore to provide means for keeping the pawls entirely within the bolt head during the time that the bolt is moving outwardly after the inward movement thereof caused by closing the door by slamming.

The various features of my invention are clearly illustrated on the accompanying drawings in which Figure 1 is, an elevational view of the lock with the cover plate removed and with parts in section to more clearly show the construction and arrangement, Fig. 2 is a sectional view on plane 2-.-2, Fig. 1, Fig. 3 is an elea ational viewsimilar to Fig. 1 but showing tho'bolt in its inner position, Fig. 4 is a sectional view on plane 4-t, Fig. 1, and Fig. 5 1s a front v ew of the outer end of a the bolt.

The lock mechanism is inclosed in a casing 10 having the face plate 11 provided with the bolt opening 12. The bolt shank 13 terminates in the head 1a having the tapered front surface 15, the bolt being adapted to travel longitudinally and being guided by the walls surrounding the opening 12, and by the guide studs 16. The bolt head is hollow and contains pawls 17 and 18 pivoted at their inner ends on pins 19 and 20 within the head 14:. The outer ends of the pawls have laterally projecting detent teeth a and Z9 respectively, these teethbeing adapted topass through passageways c and (Z to the exterior of the head toproject be yond the upper and lower sides thereof. The wall sections 21 and 22 limit the outward swing of the pawls. On the bolt shank 13 is a spreader bar 23 which is longitudinally slidable on said shank and is guided by means of screws 24 secured to the shank and extending through the longitudinal slot 25- position it will be released from the pawls and these pawls will be swung to be entirely within the bolt head, as shown in Fig. 3, such swing being caused by springs 26 and 27 mounted'on the bolt structure and engaging with the inner ends of the pawls as clearly indicated.

Extending through the lock casing is the bar28 whose ends support door knobs. Within the lock casing is a hub 29 for receiving the polygonal door knob bar 28, this hub having upper and lower cam extensions 30 and 31. Below the hub the lower wall of the lock casing provides a pivot ridge 32 on which the lever 33 is pivoted, the lever having the notch 3 1m its lower end receiving the pivot ridge. The lever has the pocket 34 for receiving the hub and has the upper and lower cam points 35 and 36 at the edges of the pocket in position to be engaged by the cam arms 30 and 31 respec tively on the hub. A. lateral abutment projection 37 at the lower end of the lever 33 is engaged by a spring 38 anchored at its other end between the lugs 39 and 40 on the lock casing, this spring tending to hold the lever 33 in vertical position as indicated in Fig. 1, in which position the campoints 35 and 36 are engaged by the cam arms 30 and i rection cam arm 31 will engage the cam point 36 and will swing the lever in thesaine the knob is turned the spreader bar 23 will be shifted, a distance before the bolt is shifted, this being for the purpose of first effecting drawing in of the detent pawls before the bolt is drawnin upon turning of a door knob. In Fig. 1 the parts are in normal position, the'pin. ll resting against the frontvends of the notches a2 and drespectively, the bolt being out and the spreader bar at its front end wedging the pawls outwardly so that the teeth as and 5 abut against the face plate above and below the belt opening12. The bolt is thus locked against inward movement by any implement inserted l between the door and the jamb. However, when the knob is turned and lever 33 swung the spreaderbar will be ininiediately shifted inwardly away from the pawls in order that springs-26 and 2? may draw the pawlsinto the bolt head, and then as soon as the bolt reaches the-inner end of the notch 42 the bolt will be drawn inwardly in order that the door may be opened. Upon release of the knob the spring 38 will swing the lever 3-3 forwardly and the bolt will be shot outwardly and the spreader bar will 4 again spread out the pawls into detaining position in front of the face plate. In order to allow closure of the door when it is swung toward closed position without turnmg of the knobs, a trigger 46 is pivoted within the bolt head a plane at right angles to that of the pawls, the outer end e of the trigger extending normally beyond the surface15 of the bolt and the finger f on the trigger extending in front of the spreader bar 28. A spring 47 secured at one end to the bolt shank engages at ltsother end against the abutment end 9 of the trigger and tends to hold this trigger in its outer normal position. l' henever the door is closed the trigger will engage with the 'jamb plate and will be shifted into the bolt head, and therefore, when the door is pushed shut without turning of the knobs, the' head in the jamb and the trigger will be locked into the head of the bolt by the outer end of the spreader 23 by virtue of its surface riding over the outer surface of the finger of the trigger 4-6.

As soon as the bolt is released after inward movement thereof, either by turning ofalrnob or by contact of the front slanting face of the bolt head with thdjarnb plate, the. first part to move will be the spreader bar and the pawls' will be spread apart to project their detent teeth.- This occur-share the bolt begins to move to its out pcs ion. Unless prevented the detent teeth would therefore have to drag across the edges of the bolt opening, and the friction would cause wearof the pawls, but the main disadvantage would be that this friction would impede or perhaps block the out ward movement of the bolt. The outer ends of the pawl teeth have been rounded and the engagement of such rounded ends with the bolt opening edges has been depended upon swing the teeth into the bolt head. Of

course where the lock parts are kept well lubricated the. pawls would readily be swung into the bolt head and the friction of their front [ends with the-bolt opening edges would be negligible. However, locks are very seldom given much attention after their first installation and the oil soon dries and the parts soon become gritty and roughened. Under such conditions the friction at the pawl pivots and of the front ends of the pawls against the openin edges might he s fl'icientto block the bolt against outward movement. I therefore provide means for allowing the detent pawls to be withdrawn into the bolt head before the bolt. itself is released and to prevent spreading thereof until the bolt is entirely out.

Pivoted tothe tip-standing lug 48 on the 1-9. Tie front end of this lever has the detent hook 50 for cooperating with the detent notch 51 in the upper edge of the releasing bar 23, a spring 52 secured to the bolt shank tending to hold the detent end 50 down. In the path of the upper end of the l ver 49 is the tripping abutment '53 extending in the lock frame. The position of this tripping abutment is such that just before the bolt reaches its outer position bol shank 13 is the bell crank detent lever lie the. upper end of lever 4-9 will strike the abutment and will swingthe detent end '50 up, as indicated in Fig. 1. When the bolt is eut'the detent notch 51 is a short distance in advance of the detent end 50 of the lever,

but when the bolt is shifted inwardly the notch will come behind the detent end 50 and then as soon as the lever leaves the trip pingabutment 5-3 the spring 52 will swing the end 50 down into the notch or: against 7 the releasing bar in advance of the notch.

Then when the bolt starts to move forwardly after an inward movement, the detent end 50 and notch 51 will cooperate to limit the forward movement of the spreader bar on the bolt, that is, the releasing bar will be stopped in its movement relative to the bolt just before such engagement with the pawlsas would resultinspreading apart of the pawls. Such locking is maintained until the bolt head is practically entirely out, and then the upper end of the lever 49 will strike the tripping abutment and the lever will be swung to unlatch the spreader bar whereupon the bar is moved out of its full distance and the pawls will be spread to effect detent engagement of the teeth thereof with the lock face plate. Thus the shifting movement of the bolt is at no time impeded by the frictional engagement of the pawls with the face plate and complete upward movement of the bolt and eflicient locking is at all times assured. Means are also provided whereby the bolt can be operated by a key inserted in a lock cylinder- (not'shown) which is supported in the pocket 5st provided in the lock wall. A bell crank lever is pivoted at its elbow adjacent the cylinder opening and itslower end has the pin 56 extending through notches 57 and 58 in the bolt shank and spreader bar respectively, the notch 57 being wider than the notch 58 and the arrangement beingprecisely the same as the arrangement with reference to the pin 41 and the notches 42 and at at the inner end of the bolt where the bolt is controlled through turning of a door knob.v Pivoted above the bell crank lever is a lever 59 having an intermediate engaging point 60 for cooperating with the top of the lever 55 to effect swing thereof when the lever 59 is swung. The lever 59 has connection with the key cylinder (not shown) and upon turning of the key the lever 59 will be swung from the position shown in Fig. 1 t0 the position shown in Fig. 3, this movement effecting swing of the bell crank lever 55 and inward movement of the bolt mechanism. Upon release and withdrawalofthe key the springBS will be the cause of all the parts returning to normal position.

It may also be desirable to prevent the look from being opened by means of the door knobs. To this end the hub 29 carries a forwardly extending wing61 having the notch 62 at its front edge for receiving the end of detent bar 63 which at its inner end is guided in the lug 64: on the lock casing and at its outer end 65 is guided in. the sleeve 66 in the face plate, this outer end forming a button. WVhen the bar 63 is shifted inwardly it will engage in notch 62 and will lock the hub 29 and consequently the bar 28 and the door knobs against turning and opening of the door will thus be prevented. To release the bar 63 from the notch 62 another button member 67 is provided to be'operable through sleeve 68 below the sleeve 66 in the face plate. This button member 67 is connected by a rockinglever 6t Wlbll the bar 63, the lever being pivoted at an intermediate point on the pin 70 ex tending from the lock casing. With this lever arrangement, the bar 63 will be shifted outto release the knob mechanism when the button member 67 is. pushed in. A spring 71 extending from the bar 63 and cooperate ing with the top of lug 6% tends to lock the bar in either its in or out position.

I do not of course desire to be limited to the exact structures, arrangements and operations shown and described, as modifications are no doubt possible which would still come within the scope of the invention.

I claim as follows:

1. In a door lock, the combination of a containing case having a face plate provided with a bolt opening, a bolt men her having a head adapted to slide through said. opening, detent pawls pivoted in said head and having detent teeth, means tendv ing to swing said pawls to be entirely within said head, a spreader bar slidable on said bolt member, spring means acting on said bolt member andspreader bar,

and tending to force said members. outwardly-means for causing outward movement of the spreader bar on the bolt member before outward'movement of the bolt member by the springmeans, said spreader bar being adapted during the latter part of its outward movement to cooperate with said pawls to spread them apart to carry their teeth beyond the sides of the bolt head, a detent member for checkingthe forward movement of the spreader bar on the bolt meme her before said spreader bar reaches full outer position whereby to prevent coiipera tion of said bar with said pawls and to allow the bolt head to reach its outer position while the pawls are still within the head, and means foreffecting release of the detent member after the bolt head has reached its outer position whereby to then allow the spreader bar to cooperatewith the detent pawls to spread said pawls tocarry their teeth into detent position beyond the sides of'said bolt head.

2. In a door lock, the oombinationof a containing casing having a face plate provided with a bolt opening, a bolt member slidable within said casing and having a head adapted to pass through said opening, detent pawls pivoted within said headand having detent teeth at their outer. ends, springs on said bolt member tending to swing said pawls to carry their teeth beyond the upper and lower sides of the bolt head whereby when said bolt member is out said i spreader bar will tend to spread the pawls &

for engagement with said pawls to spread saidpawls to carry their teeth outwardly,

operation rearwardly of the shifting mech-' anism said spreader bar will first withdraw from the pawls before-the bolt is shifted 'rearwardly and whereby during outward operation of the shifting means said apart before outward shift of the bolt, and detent means for cooperating with the spreader bar during outward movement'of lthe boltinember for preventing outward movement of the bar on the member to thereby prevent spreading ofthe pawlsby said bar'while the bolt'head is passing through I said opening, and means for releasing the detent means after the bolt member is inits outer position whereby to aliow. forward ,movement of said spreader bar and spread ing apart of the pawls.

in a lock,- the combination of a containing casing having a face plate provided with a bolt opening, a bolt member slidable within said casing and having a head adapted to pass through said opening, pawls pivoted in said head and having detent teeth at their outer ends, springs on the bolt member acting on said pawls to swing them to be entirely within said head, a spreader bar slidable on said bolt member, means tending to shift said bar forwardly on said bolt meinberand' into wedging engagement with saidpawls to spread saidpawls outwardly to carry their teeth beyond the upper and lower sides ofthe bolt head, actuating means for shifting'said bolt member inwardly, a

connection between said actuating means and said spreader bar for effecting rearward movement of said bar on said bolt member beforeiinward actuation of said bolt member whereby said pawls are first released and allowed to swing into the bolt head before inward movement of the bolt member, spring means adapted upon release of said actuating meansto restore same to normal position, said spreader bar-tending upon such restoring'movement to shift forwardly on the bolt member to spread the'pawls apart before forward movement of the bolt member, and detent mechanism for preventing such forward movement of the bar until the bolt member has substantially reached itsouter position wherebythe said pawls will be re tained within the bolt head until the bolt head reaches its outermost position.

i. In a lock, the combination of contain ing casing havin a front wall provided with a bolt opening, abolt reciprocable within said casing and having a head adapted to pass through" said opening, detent pawls pivotedwithin said head and having detent teeth at their outer ends adapted upon spreadin apart of the pawls to extend be yond the upper and lower sides ofthe bolt head to block inward movement of the bolt head, means on said bolt member tending to swing the pawls td'be' within the head, a bar slidable on said bolt member and adapted when in its outer position to engage at its front end between said pawls to spread them to carry their teeth beyond the sides of the bolt head, shifting mechanism for controlling the outward and rearward shift of the bolt and bar and adapted during shift in either direction to first'cause primary shift of the bar whereby during inward shifting said-bar will first be released from the pawls before the bolt I is shifted inwardly and whereby during the outward shift said bar will tend to engage with the pawls before outward shift ofthe bolt, means for locking bar to the bolt member away from said pawls during outward movement of the bolt member to prevent, swinging apart of the pawls during such outward movement, and means for reieasing the bar after the bolt member has been shifted outwardly.

5. In alock, the combination of acontaining casing having a front wall provided with a bolt opening, a boltreciprocable within said casing and having a head adapted to pass through said opening, detent pawls pivoted within said head and having detent teeth at their outer ends adapted upon spreading apart ofthe pawlsto extend beyond the up: per andlower sides of the bolt head to block inwardniovementof the bolt head, means on said bolt meinber'tendingto swing the pawls to be within the head, a bar slidable on said bolt member and adapted when in its outer position to engage at its front end between said pawls to spread them to carry their teeth beyond the sides of the bolt head, shifting mechanism for controlling the outward and rearwardshift of the bolt and bar and adapted during shift in either direction to first cause primary shift of the bar whereby during inward shifting said bar vwill first be released from the pawls before the bolt is shifted inwardly and whereby during the outward shift said bar will tend to engage with the pawls before outward shift of the bolt, a latch for locking the bar against outward movement on the bolt member to prevent said bar from spreading the pawls during outward movement of the bolt member, and means for tripping said latch during the latter part of the outward movement of said bolt member whereby said bar may then cooperate with the pawls to spread them apart after the bolt head has reached outer position.

6. In a lock, the combination of a containing casing having a front wall provided with abolt opening, a bolt reciprocable within said casing and having a head adapted to pass through said opening, detent pawls pivoted within said head and having detent teeth at their outer ends adapted upon spreading apart of the pawls to extend beyond the upper and lower sides of the bolt head to block the inward movement of the first cause primary shift of the bar whereby during inward shifting said bar will first be released from the pawls before the bolt is shifted inwardly and whereby during the outward shift said bar will tend to engage with the pawls before outward shift of the bolt, a latch member pivoted on said bolt member and adapted for latching engagement with said bar to prevent outward movement thereof on the bolt member during outward movement of the bolt member whereby to prevent spreading apart of the pawls by said bar during outward movement of the bolt member, and means for releasing the latch member from said bar after said bolt member has practically reached its outer position whereby said bar may then effect spreading of the pawls.

7. In a lock, the combination of a containing casing having a front wall provided with. a bolt opening, a bolt reciprocable within said casing and having a head adapted to pass through said opening, detent pawls pivoted within said head and having detent teeth at their outer ends adapted upon spreading apart of the pawls to extend beyond the upper and lower sides of the bolt head to block inward movement of the bolt head, means on said bolt member tending to i swing the pawls to be within the head, a bar slidable on said bolt member and adapted to engage'at its front end between said pawls to spread them to carry their teeth beyond the sides of the bolt head, shifting mechanism for controlling the outward and rearwardshift of the bolt and bar and adapted during shift in either direction to first cause primary shift of the bar whereby during inward shifting said bar will first be released from the pawls before the boltis shifted inwardly and whereby during the outward shift said bar will tend to engage with the pawls before outward shift of the bolt, a bell crank latch lever pivoted at its elbow to said bolt member means for holding said latch member in latching engage ment with said bar to prevent outward movement of the bar on the bolt member when said bolt member is shifted outwardly, and a tripping abutment in the path of said latch lever for effecting release thereof from the bar after the bolt member has practically reached its outermost position where upon said bar may then effect spreading apart of said pawls.

In witnesswhereof I hereunto subscribe my name this 3rd day of March, A. D., 1915.

"WILLIAM A. LURIE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G.

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