US987846A - Hotel-lock, emergency-cylinder. - Google Patents

Description

. A. ARENS & E. L. THIGH.

HOTEL LOOK, EMERGENCY CYLINDER. APPLICATION FILED 111 11.27, 1910. 1

987,346 Patented Mar.28, 1911. ZSHEETS-SHBBT l.

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v 4 8 I an 6 I A. ARENS & 'E. L. THIGH.

HOTEL LOOK, EMERGENCY CYLINDER. APPLICATION FILED APE.27, 1 910.

Patented Mar. 28,1911.

2 SHEETS-SHEET 2.

Eli. 72 1 I J exact description. 1o

be dead-locked from the inside in such manconstruction of lock of the so-called cylinder latch bolt may under normal conditions be is aside view of the emergency key showing consists in the construction and arrange- TEICH, or TO 1*. & 1F. 0033111, on NEW BRITAIN,

NECTICUT.

ToaZZ whom it may concern:

Be it known that we, AUGUST ARENS and ERNEST L. TEICH, citizens of the United States, residing, at New Britain, county of Hartford, State of Connecticut, have in,- vented certain new and useful Improvements in Hotel-Locks, Emergency-Cylinder, of which the following is a .full, clear, and

Our invention relates to so-called hotel corridor locks, and is particularly concerned with mechanism whereby the latch bolt may ner that said bolt can not be operated from the outside except by the use of a' key of particular construction commonly known as an emergencyv key.

Tothis end the" invention contemplates a type in which the key-operable plug of the cylinder is so constructed that while the retracted by any of applurality of keys, such as the guest, master 'and grand master keys, said latch bolt when locked by theinside dead-locking mechanism can'only"be operatedby a so-called emergency-key.

With these objects in View the invention ment of parts, a preferred embodiment of which is illustrated in the accompanying drawings, in which I gure 1 is a side view of the lock with the cap plate removed; Fig. 2 is a fragmentaryiview of the look similar to Fig. 1, showing' the inside dead-locking mechanism in dead-locking position; Fig. 3 is a sectional view on the line 3-3 Fig. 1, showing also a portion of the locking cylinder; Fig. 4 is a longitudinal sectional ,view of the locking cylinder and key-operated plug showing the position of the pin tumbler when operated by one of the ordinary keys. Fig. 4 is a view similar to Fig. 4 showing the position of the pin tumbler when operated by the emergency key. Figs. 5, 6 and 7 are inner end views of the cylinder showing the locking cam in its several operating positions; Fig. 8 comprises an edge and side View respectively of the inside dead-locking mem-' ber for dead-locking the latch bolt; Fig. 9

thebitting for operating the pin tumbler of the emergency cylinder, and Fig. 10 is a similar View of one of. the other keys of the HOTEL-1300K, EMERGENCY-CYLINDER.

Specification of Lettersl'atent. Application filed April 27, 1910. Serial No. 558,028."

BRITAIN, CONNECTICUT, AS SIGNORS NEW CONNECTICUT, A CORPORATION OF CON- Patented Mar. 28. 1911.

series, for example, the master keyshowing the bittlng which prevents operative positioning of the emergency pin tumbler.

- mounted.

5 indicates the. latch bolt, which is provided with a stem 6 having a tail piece 7 to be engaged by the cam arm of the cylinder lock. The stem 6 of the latch bolt carries a coiled spring 8 bearing at one end against the head of the bolt and at the opposite end against an abutment 9 to normally project said bolt;

In the rear of the lock case is mounted an inside dead-locking member 10, having an arm 11, which,'when said deadlocking member is in normal position", lies opposite a notch 12 in the tail piece 7, whereby the latch bolt may be freely retracted without interference of the deadlocking member by any of the series of keys above mentioned. ber is be engaged by a roll-back 14, which is operated by a suitable thumb. latch (not shown) from the inside of the'door. The roll-back 14 is provided with cam faces 15 and 16 respectively, arranged to be engaged by a spring 17 to hold said roll-back in either of 1ts positions.

Referringto Figs. 4 and 4 itwill be seen that the lock cylinder is of the duplex plug type, that is to say, said cylinder consists of a caslng 18 having the usual pin tumbler mechanism '19, which cooperates with the inside key-operated plug 20, to which the cam arm 21 is secured at its inner end, and also with a cylindrical key-operated plugsurslidably rounding the plug 20 and comprising" two v sections 22 and 23. The section 22 is of the usual construction to provide for an increased number ofpermutations of the lock, and is controlled by the pin tumbler mechanism 19, whereby a series of keys may be employed therewith, such as a guest, master and grand master key. Any one of the keys just mentioned will serve to release the inside key-operated plug 20 and the outside plug section 22 from the pin tumblers -19,

in order to permit of rotation of the cam arm 21 for normal operation of the latch so" The dead-locking'memprovided with a notch 13 adapted to loo the tail piece 7 .ofthe latter. For such normal operation the inside locking plug is rotated clockwise (as viewed in Fig. 6). Reverse movement of the inside locking plug by any of the keys just mentioned is prevented, however, by-a in 24 secured to the inner end of the cylin rical plug section 23 and engaging a shoulder 21 on the head of the cam arm 21, which section 23 remains stationary when the inside plug only is operated by any of the three keys just mentioned, This for the reason that'said keys are so bitted that they cannot operatively position the pin tumbler 19* which controls the inner or emergency cylindrical plug sec tion 23. When the dead-locking member 10 is raised to dead-locking position, as shown in Fig. 2, the arm 11 of said member stands behind a shoulder 7 on the latch bolt tail piece, whereby operation of the latch boltby any of the three keys mentioned will ob viously be prevented.

In case it is necessary to unlock the door from the outside when the latch bolt is blocked fromthe inside by the dead-locking mechanism,means are provided whereby the dead-locking member 10 may be returned to inoperative position by operation from the outside by the so-called emergency key. To

this end the dead-locking member is provided with a lug 25 and the so-called emergency key is so bitted that it is adapted ,to

operatively position the pin tumbler 19 of the locking plug section 23 which carries the stop pin 24;. By this means the inner plug section 23 may be rotated in unison with the plug and consequently'the cam arm 21- may be rotated counterclockwise as viewed in Fig. 7 to enable said cam arm to engage the dead-locking member lug 25 and return the dead-locking member to its inoperative osition. Thereupon the "cam arm may be rotated in-the. reverse or clockwise direction by the emergency key and the latch bolt retracted. The lock, furthermore, may be provided with the usual independent knob spindles for independent operation of the latch bolt by means of the outer and inner knobs (not shown) respectively, the outer knob spindle operating the roll-back 29 i so which engages a latch operating roll-back and centering yoke 30, said yoke being provided with guide stems 31 carrying springs 32 which operate between the heads 33 of said stems and the guide'lugs 34 secured to the lock case. The inner knob spindle is provided with a roll-back (not shown) lying immediately beneath the roll-back 29 and also adapted to engage the yoke 30. The

roll-back 29 and consequently the outer knob may be blocked against operation in the usual manner by means of a dogging member 35 adapted to engage a notch 36 in said roll-back 29, said dogging member 35 being operated in reverse directions by the press buttons 37 and 38 respectively and connectin member 39. g

ile we have herein 'describeda particular embodiment of our invention, it isv to be understood that the" same may be varied in details within the scope of the appended claims.

-What we claim is: Y

1. In a hotel corrider lock, the combina tated in one direction by j any of a plurality of keys, including an emergency key, to retract the latch bolt when said dead-locking member is in inoperative position, means in said cylinder to prevent rotation of said cam arm in the opposite direction by any" except the emergency key, and means whereby said cam .arm may move said dead-locklng memher to inoperative position by such opposite rotation of said cam arm. 1

2. In a hotel corrider lock, the' combination with a spring-p'rojected-latch bolt and a dead-locking member therefor adapted to be operated from theinner side of the lock, of a locking cylinder adapted :to be, operated from the outer side of the lock having a cam arm adapted to be rotated'in one direction by any of a plurality of keys, including an emergency key, to retract said latch bolt when said dead-lockin memberis in inoperative position, a key operated plug in said locking cylinder having means to prevent rotation of said cam arm in the opposite direction except by the j emergency key, and

means on said-dea'd-locking member whereby said member may be thrown to i-noper-' ative position by such opposite rotation of said cam arm.

3'. In a hotel corrider lock, the combination with a spring-projected latch bolt, of a dead-locking member therefor adapted to be operated from the inner side of the look, a locking Icyl-inder having "a locking plug adapted tobe operated from the outer side of the look, a cam arm carried by said plug, 1

pin tumbler mechanism arranged to permit rotation of said arm in one direction by any of a plurality of keys, including an emergency key, to retract the latch bolt, pintumbler mechanism' arrangedto prevent rotation of said cam arm in the opposite direc tion by any except the emergency key,"'and meanson saiddead-locking member whereby said. member may be thrown to inoperative positionby such opposite rotation .of said cam arm.

1 r 4. In a hotel corrider lock, the combina-- tion with a spring-projected latch bolt and a dead-locking member adapted to be oper- .-ated from the inner side of the lock, "of a ceases locking cylinderhaving a sectional locking locking plug to prevent rotation of saidcam arm in the opposite direction by any except the emergency key, means whereby said locking plug sections may be rotated in unison in said opposite direction by the emergency key, and means on said dead-locking member whereby said member may be thrown to inoperative position by such opposite rotation of said cam arm.

5. In a hotel corrider lock, the combina tion with a spring-projected latch bolt and a dead-locking member therefor arranged to be operated ,fromthe inner side of the lock,

of a locking cylinder having a locking plug arranged to be operated from the outer side of the look, a cam arm carried'by said plug,

.means whereby saidcam arm maybe rotated in one direction by any of a series of keys, including an emergency key, to retract the latch bolt, a sleeve surrounding said locking plug havingtmeans to prevent rotation of said cam arm in the opposite direction, except by said emergency key, means permitting rotation of said plugand sleeve in such opposite direction by said emergency key, and means on said dead locking memberwhereby said member may be thrown to inoperative position by such opposite rotation of said cam arm.

6. In a hotel corridor lock, the combination with a spring-projected latch boltand a.

"lockhaving a locking plug, a cam arm cara fried by said plug, pin tumbler mechanism for said plug arranged to be operated by any one of a plurality of keys, including an emergency key, to permit rotationsof said arm in one direction, asleeve on said plug having a stop to prevent rotation of said arm in the opposite direction, pin tumbler mechanism for said sleeve arranged to be operated by said emergency key to permit rotation of said cam arm in either direction, and means on said dead-locking member whereby said member may be thrown to inoperative position by said cam arm when rotated oppositely to said first mentioned rotation whereby said emergency key may first release said dead-locking mechanism and then retract said latch bolt. 7

'7. In a hotel corridor lock, the combina tion with a spring-projected latch bolt,of a dead-locking member therefor arranged to be operated from the inner side of the the opposite direction of any except the emergency key, means operable by the emergency key to release said cylindrical plug whereby said key may operate said cam arm in either direction, means on said deadlocking member whereby said cam arm may move said member to inoperative position when said arm is rotated in said opposite direction whereupon said cam arm may thereafter be operated by said emergency key to retract said latch bolt.

8. In a hotel corridor lock, the combination with a spring-projected latch bolt, of a dead-locking member therefor, a roll-back .for said dead-locking member, "a thumbpiece for said roll-back operable from the inner side of the lock, a locking cylinder upon the outer side of the lock having a locking plug carrying a cam arm adapted.

to be rotated in one direction by any of a plurality of keys, including an emergency key, to retract'the latch bolt, means to prevent rotation' of said cam arm in the opposite direction by any except the emergency key, and means on said dead-locking member whereby said member may be moved to inoperative position by such opposite rotation of said cam arm. 1

9. Inaliotel corridor lock, the combination with a spring-projected latch bolt of a" dead-locking member therefor arranged to be operatedfrom the inner side of the lock, a locking-cylinder upon the outer side of the lock having a sectional locking plug, a cam arm carried by one'section of said plug, means for permitting the rotation of said plug section in one direction by any of a plurality of keys, including an emergency key, a normally stationary plug section having means to prevent the rotation of said cam arm in the opposite direction, means cooperating with said second plug section adapted to be released by said emergency .key to permit simultaneous rotation of said first and s eoond'plug sections in either direction, and means on said deadlocking member whereby said member may be moved to inoperative position by rotation .of said cam arm in a direction opposite to said first named direction-whereby said latch bolt maybe thereafter retracted by rotation of said cam arm in said first mentioned direction. r

10. In a hotel corridor lock, the combination 'with a latch bolt and a dead-locking member therefor adapted to be operated from the inner side of the lock, ofv a key controlled memberoperable from the outer side of the look by any of a plurality of keys," including an emergency ke to re tract the latch bolt when said dea -locking member .is in inoperative posit on, and key controlled means to prevent retraction of the latch bolt by said key controlled latch retracting member except by the emergency key when said -dead locking member is in operative position, b

11. In a' hotel corridor lock, the combine tion with a latch bolt and a dead-locking member therefor adapted to be operated from the inner, side of vthe lock, of a key controlled lever operable from the outer side of the lock to retract the latch bolt by any of a plurality of keys, including an emergency key, when said dead 1ocking member is in inoperative position, means to prevent retraction of the latchbolt by said lever except by operation of the emergency key when said dead-locking mem mg a cam arm arranged to be rotated-by any of a plurality of keys, including an emergency key to retract the latch bolt when said dead-locking member is min-- operative position means to prevent operative rotation ofsa1d cam arm by anyexcept the emergency key to retract the latch bolt when said dead-locking member is in opera; .tive position, and means whereby said cam armmay be rotated by said emergency key to throw said dead-locking member to inoperative position and thereafter permit retraction of the latch bolt by" said cam arm.

13'. In a hotelco'rridor lock, the combination with a latch bolt and a dead-locking member therefor o erable from the inner side of the lock, 0 a locking cylinder on the outer side of the lock, having a cam arm arranged to be rotated by any of a plurality of keys; including an emergency key bitted to retract the latch bolt when said dead-locking member is in inoperative positionfmeansin said cylinder to prevent rotation of saidcam arm to vretract the latch bolt by any but the emergency key"( when said dead-locking member is in operative position said emergency key being bitted to control said last mentioned means to permit rotation of said cam arm to throw said dead-l ockingmember to inoperative position.

. v I AUGUST'ARENS. ERNEST .TEIOH. Witnesses: i

i G. ERNEST Roo'r, WM. V. CoL vI v.

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