US 3893314 A
A door lock assembly is provided which has particular utility in hotels and motels, and in other places where a change of occupancy frequently occurs. The assembly includes removable logic inserts which change the lock tumbler settings for each change of occupancy. In the embodiment to be described, multiple logic inserts are provided which permit the lock to be operated by different independent keys, each logic insert being independent of the others, and each being independently changeable. For example, three logic inserts may be used for the lock in a motel, to render the lock accessible to three different keys, namely, a guest key, a maid's key, and a master key. A mechanism is included in the lock, in the embodiment to be described, which may be actuated by the occupant within the room to prevent operation of the lock from the outside by one or more groups of the independent keys, for example, by any key but the master key when privacy is desired.
Description (OCR text may contain errors)
United States Patent [1 1 [111 Raymond July 8, 1975 1 LOCK ASSEMBLY  Inventor: James W. Raymond, 300 Avenida  ABSTRACT Cumbre, Newport Beach, Calif. A door lock assembly is provided which has particular 92660 utility in hotels and motels and in other places where a change of occupancy frequently occurs. The assem-  bly includes removable logic inserts which change the  Appl. No.: 438,867 lock tumbler settings for each change of occupancy.
in the embodiment to be described, multiple logic int serts are provided which permit the lock to be operated by different independent keys, each logic insert being independent of the others, and each being inde- [581 Fleld of Search 70/276, 363, 382, 383,
70/384 385 405 D16 60 339 pendently changeable. For example, three logic inserts may be used for the lock in a motel, to render the lock (56] Rehrenm Cited accessible to three different keys, namely, a guest key,
a maid 5 key, and a master key. A mechanism lS m- UNITED STATES PATENTS cluded in the lock, in the embodiment to be described. l,004,904 l0/l9ll Rees 70/339 which may be actuated by the occupant within the 2.970.466 2/1961 wfllckemw 70/339 room to prevent operation of the lock from the out- 3'l5476l 0/1964 Comma 70/276 x side by one or more groups of the independent keys, 3,555,858 l/l97l Owen 70/384 for example by any key b h ter key when pri- Primary Examiner-Robert L. Wolfe Attorney, Agent. or Firm-Jessup 8t Beecher MA/O KEY M4576? 6) vacy is desired.
8 Claims, 4 Drawing Figures MA/D -/0 war-00f ag 1 LOCK ASSEMBLY BACKGROUND OF THE INVENTION Although. for purposes of clarity. the specification herein will be directed to the utilization of the lock of the invention in hotels and motels. it will become evident as the description proceeds that the lock has general utility. for example. in institutions. industrial plants. government facilities. and so on. where changes in the locks are required with some frequency. and where master keying is employed.
Tremendous problems have arisen during recent years involving theft prevention in hotel and motel rooms due to the unauthorized use of the keys issued to guests and maids. Such keys are often lost. stolen. or otherwise find their way into the hands of thieves. The problem is aggravated because the prior art hotel keys normally carry identifying tags giving the thief exact information as to the name of the hotel. its address. and the room number to which access may be gained by use of the particular key.
Although the guest keys used in conjunction with the lock of the present invention may also carry the name and address of the hotel and the room number, the information is valueless because the key will no longer fit the lock of the specified room. because the lock mechanism is changed for each occupancy. The key itself may be disposable. and. because ,of that. and as an added feature. it can be imprinted with the guest's name or initials for proper identification when the guest requests his key at the desk during his stay at the motel.
When the lock of the invention is used in hotels or motels. it has an added advantage in that the maid can remove the previous guest's logic insert from the room after it has been made up following a check-out. She can then insert a special insert which will fit the bellman's key as he escorts a new guest to the room. This assures that the room will become available to the new guest. only after it has been made up and is ready for occupancy. The bellman can then replace the special logic insert with the logic insert issued to the new guest.
It is preferable that the independent inserts in each lock. which condition the lock to receive the maids key and the master key. are not readily removable. This is in order that the lock may be rendered tamper-proof. In this way. the lock is accessible only to the master key. and those aspects of the lock are not under the control of the guest. or of the maid.
The basic purpose of the lock of the present invention. therefore. is to provide an assembly which is set to match a new key for each new occupancy of the room. Specifically. as described above. each lock is set by inserting a guest logic insert into the lock on the inside of the door. The guest logic insert then establishes a certain pattern in a first group of tumblers within the lock. and this pattern is matched by a second group of tumblers only when an appropriate key is inserted in the lock which has the capability of causing the second group of tumblers to assume a pattern which complements the pattern of the first group. With such a mechanism. each lock becomes operative only when it has received the appropriate logic insert. and at that time. the lock is conditioned only to operate in conjunction with a key corresponding to that particular insert. The
lock of the invention is flexible. since it may provide that any particular key-logic insert combination may be used in conjunction with any door in the establishment.
Since the tumbler characteristics of the lock of the invention may be changed at will. merely by issuing a new key-insert combination. the problem of lost keys is solved. and each guest has the security of knowing that there are no old keys to the lock of his room which may be in the hands of unauthorized persons. Another advantage of the lock assembly of the invention is that the lock is capable of operation by means of relatively inexpensive and disposable logic inserts. and by inexpensive und disposable keys.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a schematic representation showing in perspective the lock assembly in accordance with one embodiment of the invention;
FIG. 2 is a representation of an appropriate card-like key which may be issued to a guest to operate the lock of FIG. I. when an appropriate mating guest logic member is inserted into the lock from the inside of the room to set the lock tumblers to a particular configuration;
FIG. 3 is a top section showing a lock assembly constructed to incorporate the concepts of the embodiment of FIG. I; and
FIG. 4 is a side section of the assembly of FIG. 3. taken essentially along the line 44 of FIG. 3.
DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENT The lock assembly of FIG. I includes a usual door actuating mechanism which. in turn. includes an inside knob 10. an outside knob 12. and a shaft 14 intercoupling the two knobs. In accordance with usual prior art practice. the inside knob I0 is coupled to a latch 16. so that the latch may be operated'whenever the knob I0 is turned in either direction. The outside knob 12 is coupled to the latch I6 through a cam I8. and is capable of operating the latch only when the cam l8 can turn. In the assembly of FIG. I, the cam I8 is enegaged by a bolt 20. so that it can turn only when the bolt is freely slidable along a particular path.
A first tumbler means 22 is disposed in the path of the bolt 20, and it comprises a stack of individual leaf members. Each leaf in the stack is shaped to define a tongue 22a on the side of the stack remote from the bolt 20. as shown. A plurality of springs 24 bias the individual leaf members of the tumbler means 22 into a transversely aligned position. as shown in FIG. 1. However. when a guest logic member 26 is inserted through an opening in the lock on the inside of the door. a pattern of teeth on the forward edge of the logic member shifts selected ones of the transverse leaf members of the tumbler means 22 to various displaced positions.
As the bolt 20 moves to the right in FIG. I. it carries with it the tumbler means 22. A second tumbler means 28 is disposed in the path of the tumbler means 22. Each leaf member of the tumbler means 28 defines a groove section 280 on the side of the tumbler means 28 facing the tumbler means 22, and this groove receives the tongue section 220 of the tumbler means 22. only when the displaced leaf members of the tumbler means 28 complement the displaced leaf members of the tumbler means 22. The leaf members of the tumbler means 28 are biased to a normally transverse aligned position by a plurality of springs 30. However. these leaf members may be displaced transversely when a key 32 is in- The purpose of the'additional tumbler means 40 is to Ipermitj'aeces'sto the roomby a master key or by a maid's key. eachof whichis independent of the particlar key: issued to the guest. ;The leaf members of the .tu'rnbler meansso may be set. for example. to a particullar displaced .jconfiguration. by means of a maid logic memberjss which. tog ether'w th a master logic memr49is'ntountedon a lever 51 within the lock assem- The" lever 5l is pivoted at a pivot point and s o'v e'd by an actuating bar 53 which is attached to one ,end offthe lever 51 and which protrudes through the ont side oft lock to be term nated y a ope ating,
. .13; serted into a keyhole formed door.
The key 32tn'aya 8 u y member witha pat'tern ofteeth formed 'on forward edge. It will be appreciated that when the pattern ot teeth on the key 32 is'related to thepattern of teethjon' the logic m'emberj26; such'fthat the'fdisplacement'fof leaves in the tumbler. means 28 eompIementsJthe displacement of leaves in the tumbler,meansZA'thetum bler means 22 will be free tolmove to th'etight in'FlG l, as it is actuated by the bolt 20," with"the' irregularlyshaped tongue portion22a being received ,ittthe co mplementing irregularly-shaped eovepemon zsa. M who i ,d. y L
The m 32 may! forjgxampk; t gum keywhtch, en t s estred to operate the lock by t e mud s as shown in FIG; 2, is in the fort" ofa card having teeth 1'? X $h l P'- "1 i on its forward edge which must complement the teeth E gs-m g" g 'fi fl i l i fltz t0 t i E 1 h i .f l d g cm or no c at: Amto tzcon I- h achieved between 'the transverse settings of the leaves is a to 'l 'f W of the tumbler means 22 and of the tumbler means 28, t e mast" Y- thc kiwi? F r- Whit? F movementof the tumbler means 22"int'o the tumbler fl' abnu the PM)1 3 x m T 3 maid means 28 is permitted. so that the do? may be opened, 28 16 from thCglfiailglfirnl'geatls 4t) and to insert -ne mas The tumbler means 22 and 28 are normally biased t v Ogle mcm lock proprtate sprmtts. sue as springs an f '3 As explained above, when a guest checks into the gz g f l' fg g g: 1: I 1 f motel or hotel he is issuedaguest logic member 26 and g F- v Zr- P L. 0 f i a mating guest key 32. Then he, or the bellman, inserts hp z gzgz i fi' i 1 3'1 i 'ggf the guest log c member 2 into an inside opening in the d g f z' fi ac ,L lock ofthe room allocated to the guest, thereby condi-Q the maidis l'lo'lftfl'cer capable of inserting the ma d. honing thelock to be operated by the insertion of the t a or K so that the guest subseque-nny to lottic'rhemlter 49. The pushbutton i s eoud to t e 5 room- R" Y in on v I w In the embodiment of FF, 1, a third tumbler means is provided in the pathot'the tumbler means 28-The -i k g" tumbler means 40 also is formed of a stack of leafmem-J e a e; Show in FIG 2 imqnias mom which biased. into a mmversefligmd position number to which the key is currently issued which may. y PPt'opnate springs. such as the springs 42."Each of 40 y attached "HM key by an adhesive the leaf members of the tumbler means 40 is formed to nick" key may he disposable a mentioned define a tongue section 40A. This tongue section is re- I above in which event. eh m: 5, chant-.5 on m P S W m t on 28b of the tumble f the hotel. the key and the associated guest logic means only the 9 of "amwemdy 'n'tcmbet' 26 is discarded. When a new guest checks into displaced leaves of the tumbler means 40 complements Mm 1 issued a key such as the guest My 37, the position of the displaced leaf members ofthe tumand t, mam number is ffi d to p by 4 mcansizmunk a match ive stick'cr'A. The bellman is also issued a me -thin; tumbler means 40 prevents movement of the tumbler Y Y [ttilbst logicimembcr 26. Then, as the .gue'at enters his means 23 alng the P Tm mean 4 mom',.the bellman inserts the guest logic member 26 may be'biased in opposite directions .by 'a v k t'tto th "inside slot in the lock of his room and, thereafp such fiv 1 c r anopcrate his look by his guest. 'cey.
lt will be appreciated.ftherefore.that whena-ntatch Aflh wfln'l-lfi 2, the guest rzgv. hi name on is him/6d between m u" h in 1 the wheri'he checks out, and the check-out date bier meaflS the i mean 22 i5 9 Q.,mPY. A may been te'r hd on thekey. The'forward edge of the along its P engagcmelll w h? l -i'. j ss f ky v con'tainsappropriate teeth, so that it can displace 2 so h the rm x s'ov' At h t m .theleat'members of the tumbler means 28 to the approtumble? fl l fi 'l i "fpriate transverse' positions to complement the disprevented by the unmatched tumbler means 40. the placer! positions of the tumbler means 22 to permit the other hand; when 8 match is BChlQyGd between'thc tum (loot-'10 opened, when the guest, checks on! Of the bler means 28 and the tumblermeans t l movemcntof h ttj'he'j-nfiy take his guest key 32 with him. or throw the bolt 20'causes the unmatchedtumbler means 22 'to it'awa The'rifas' described above. after the room has move the tumblermeans 28 into engagement the been tnade' up for a new guest, h id may ve tumbler means'40,. so 'tha'tfa'gain the door maylbe thefold guest logic member 26 from he lock. and. reopened, this being due to a completely independent inplace i t with"a bellman logic member which wi l match tcrrclationshlp between the key operating the tumbler the lock with the bellmans key. means 28, and a further key operating the tumbler On check-in, the bellman replaces the bellman logic lllLflrlS 40. member with the particular guest logic member 2 i'-- in the lockioutjside otthe sued to the guest. It the hotel service does not include bellmemthe new guest logic member may be inserted into each lock by appropriate personnel. as the roomscoupled to said mechanical means for locking said third logic member into engagement with said third tumbler means.
become available. and matching guest keys may then be identifiedwith respect to the various rooms. to be issued to the guests as they check in.
tion is enclosed in an appropriate lock casing 52 which.
in turn, is mounted in an appropriate opening in the hotel room door 54. As shown in FIG. 3.'for example.-
the shaft 14 between the knobs and I2 is coupled to the operating mechanism of the lock assembly through an appropriate slip clutch 60. This clutch causes the outside knob 12. for example. to rotate whenever excessive torque is applied to the knob in an effort to gain unauthorized entrance into the room. Access for the guest logic card 26 is gained through an inside slot designated 62. and the maid and master logic members are mounted in a appropriate slot 66 for operation by the bar 53. as described above.
The invention provides, therefore. an improved lock assembly which may be set for each new occupancy of a hotel room. or the like. and which has the additional feature in that a maid may obtain access to the room through the use of an independent key which operates independent tumblers within the lock. or by a master key. Also. provisions are made to permit the occupant to lock out the maid when he is in the room. ifhe so desires. However. even though the maid can be locked out of the room. the master key can still be used to gain access to the room. which may often be desirable in the case of an emergency.
It will be appreciated that although a particular embodiment of the invention has been shown and described. modifications may be made. it is intended in the claims to cover the modifications which come within the spirit and scope of the invention.
What is claimed is:
l. A lock assembly including: a casing; is first plurality of tumblers mouiited in said casing and individually settable to different positions established by a first logic 4. A lock assembly'including: a casing; a bolt member mounted in said casing and slidable along an axis in said casing; a first tumbler means mounted in said casing member; a second plurality of tumblers mounted in said casing and individually settable to different positions established by a key. said tumblers of said second plurality permitting movement of said tumblers of said first plurality relative thereto only when the positions of the tumblers of said first plurality have a predetermined relationship with respect to the positions of the tumblers of said second plurality; and a third plurality of tumblers mounted in said casing and individually settable to different positions established by at least one further logic member. said tumblers of said third plurality permitting movement of said tumblers of said second plurality relative thereto only when the positions of the tumblers of said second plurality have a predetermined relationship with the positions of said tumblers of said third plurality.
2. The lock assembly defined in claim 1, and which includes mechanical means for selectively moving a second logic member and a third logic member into engagement with the tumblers of said third plurality.
3. The lock assembly defined in claim 2, and which includes a locking means mounted on said casing and and positioned on said axis adjacent said bolt member. said first tumbler means comprising a stack of leaf members individually slidable transversely to said axis to positions established by a first logic member; second tumbler means mounted in said casing and positioned on said axis adjacent said first tumbler means. said second tumbler means comprising a stack of leaf members individually slidable transversely to said axis to positions established by a key. said second tumbler means permitting movement of said first tumbler means along said axis relative to said second tumbler means only when the positions of the leaf members of said first tumbler means have a predetermined relationship with respect to the positions of said leaf members of said second tumbler means; and a third tumbler means mounted in said casing and positioned on an axis adjacent said second tumbler means, said third tumbler means comprising a stack of leaf means individually slidable transversely to said axis in positions established by at least one further logic member, said third tumbler means permitting movement of said second tumbler means relative to said third tumbler means only when the positions of said leaf members of said second tumbler means have a predetermined relationship with respect to the positions of said leaf members of said third tumbler means.
5. The lock assembly defined in claim 4, and which includes first spring means resiliently biasing said leaf members of said first tumbler means transversely of said axis to a transversely aligned position. and second spring means resiliently biasing said leaf members of said second tumbler means transversely of said axis to a transversely aligned position.
6. The lock assembly defined in claim 5. and which includes third spring means resiliently biasing said leaf members of said third tumbler means transversely of said axis to a transversely aligned position.
7. The lock assembly defined in claim 4. and which includes first spring means resiliently biasing said first and second tumbler members along said axis away from one another. and second spring means resiliently biasing said third and second tumbler means along said axis away from one another.
8. The lock assembly defined in claim 4. in which one of said first and second tumbler means is shaped to define a tongue section. and the other of said first and second tumbler means is shaped to define a groove section for receiving said tongue section only when the positrons of the leaf members of said first tumbler means match the positions of said leaf members of said second tumbler means; and one of said second and third tumbler means defines a tongue section. and the other of said second and third tumbler means defines a groove section for receiving said last-named tongue section only when the positions of the leaf members of said second tumbler means complements the positions of said leaf members of said third tumbler means.
i i fi