US2062020A

US2062020A - Chain and lock combination

Info

Publication number: US2062020A
Application number: US12982A
Authority: US
Inventors: Engel Sylvan
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-03-25
Filing date: 1935-03-25
Publication date: 1936-11-24
Anticipated expiration: 1953-11-24

Description

Nov. 24, 1936. s. ENGEL CHAIN AND LOCK COMBINATION Filed March 25, 1955 V v 2 5 11 a SYLVAN ENGEL.

INVENTOR ATTORNEY Patented Nov. 24, 1936 UNITED STATES zteztzt PATENT OFFICE 12 Claims.

My invention relates to chain locks. and in more detail, to a combination of a lock with a chain attached which functions on a door permitting the door to be opened partially on a twist of the lock knob in one direction and then permitting the door to be opened fully on a reverse twist of the knob.

At present there is no structure combining the locking and barring functions in a single unit, whereby a single actionable releasing mechanism functions to release both the locking and barring means individually and consecutively by reverse movements of the releasing means. There is, however, a chain bar which is made up of a chain attached to the jamb of the door frame and the other end of the chain is supplied with a grooved element suitable for sliding in a way in the door. This chain bar must be left released normally in order to permit a person to open the door from the outside and it must be released in order to open the door from the inside when permitting a person to enter. Thus, the chain must be left or placed in a detached position almost continually and often results in a lack of protection when it is most needed. In addition to the above type of looking and barring mechanisms there is a type comprising a combination, a locking and barring unit which is controlled by two releasing mechanisms, one of which releases the locking means and the other, the barring means. This type is not foolproof because the releasing of the barring means can also release the locking means. In addition this mechanism requires the use of both hands and is constructed with a complexity of parts not present in the described and claimed structure below.

The purpose of my invention is to provide a combined lock and chain which functions in such a way that the door to which it is attached cannot be opened from the inside unless the chain is in a position to function.

A further object of my invention is to provide a combined chain and lock which will permit the door to which it is attached to be opened from the inside only to the extent of the chain on the initial turning of the lock knob and will release the chain and permit the door to be opened completely on a further turning of the knob in a second direction.

Another object of my invention is to provide a chain and lock combination which, when attached to a door, will permit the door to be opened from the inside only to the length of the chain on the initial turning of the lock knob,

but which will allow the door to be opened completely from the outside by turning the key to the proper opening position.

A further object of my invention is to provide a lock and chain combination for a door in which the chain automatically immediately assumes a position from which it will function on the closing of the door.

I accomplish these and other objects by pro viding a lock for a door comprising two tongues operated by arms on a knob in such a way that when the knob is turned in the one direction it releases the tongue held in a locking groove on the door jamb and when the knob is turned in the opposite direction it releases the other tongue which has been held in one end of a chain, the other end of the chain being permanently fastened to the door jamb.

Further and more specific objects, features and advantages will more clearly appear from the detailed description given below taken in connection with the accompanying sheet of drawings which forms a part of this specification.

Figure 1 is a plan view of my lock with the cover piece removed; Fig. 2 is a section along the line 2-2 of Fig. 1; and Fig. 3 is a section generally along the line 3--3 of Fig. 1 showing the door opened and the lock operating with the chain extended.

In the drawing, my locking device is constructed in two parts, the first part 3 is secured to the door and the other part 4 is secured to the door jamb 2. The part 3 which contains the locking and moving mechanism comprises the base plate 5 on which the moving mechanism 6 rests which closes and opens the lock, the cam parts 1 which permit a key to open the look without the chain functioning, and the knob and covering part 8.

A base platform 9 raises and supports the part 3 carrying the locking and moving mechanism at a height so that part of the base plate with part of its moving mechanism extends over the part 4 attached to the door jamb. This base platform 9 extends around the edges only of the part 3 and can be eliminated if the part 4 is countersunk into the door jamb.

The base plate 5 is constructed with side walls it which guide the moving mechanism 6 and is provided near its tail end with an opening I l and near its head end with openings l2 which are positioned directly over the part 4 attached to the door jamb. The purpose for which the openings H and i2 are to be used will be described hereinafter.

The moving mechanism 6 comprises two tongues or plates I3 which rest on the base plate, the front ends M of the plates extending part way over the openings 12. At about the mid part each plate is provided with a pin 15 and near their rear end the plates are provided with the pins IS. The plates are also provided with a cut out portion I1 which corresponds to and is directly over the opening I I in the base plate. The pins l6 are to the rear of and near the out out portion. [1. The front ends 14 of the plates .are beveled so as to slide over extensions on the part 4 attached to the door jamb. The inner sides of the plates rest adjacent each other and the outer sides are near the side walls IU of the base plate, thus each plate can slide back an'd-'forth in a way formed by one side wall l and theside of the other plate.

The cam i 8 is placed above the plates and is provided with an eccentrically placed .stem' H) which extends through the cut out part ll of the plates andzthrough'theaopening ll .inthebas'e iplate. lI'herend of this stem is provided with an elongated opening 20. "The. cam is positioned near the pinsylfi so that on'theturning of the cam its aedge ,strikesstherpins vand;forces the plates backxward. 'Asthe pins arerplaced close together they .;are struck rpractically simultaneously and the plates will move backward almost'together.

iIoxturn-the cam l8,a cylinder lock 2| on the routersside of 'therdoor is'provided with an extension piece or extension bar 22 which extendsfrom the lock -barrel intothe shaped opening 20. Thus :by turningthe extension piece of the lock the cam turns and the pins l6. are struck to-force' back the plates or'tongues I3. -Iniorder for the cylinder ilo'ck tolfunctionteasily'withzthe cam said lock is centerednin'linewith the stem l9 about which the cam turns.

.ZIhe-rcoveringpart '8 comprises 'accover plate 23 vwhichcextends over the-base plate and its side In and forms-the outsideof thezpart'3 of the device. This-coversisprovidedionits outer side with a knob :24*whic h hasa stem or shaft projecting :through the cover to theinsidexof thepart-"3: and iformingqthe extension or, rollbaoktZS.

Ilhis:extensionisprovided with the side extendxing arms6*whicharerclose 'toand capable of istrikingtheipins l'5 .when the knob 24 is turned in reverse directions. on :each :plate a littleito the 'back of and one on :eithersideof the knob and its extension-so that 'theiturningrof ithe knob to the right releases or IIOITGfiS bECkOIIGTOf theplates ortongues and the :turning of the knob to theleft forces back the other tongue or plate. As a continuous turn in :one direction forces one plate back andfthe other [forward both plates can onlyabe forcedlbackward byra-reversal of'ithe:direction of turning of the .knob.

A piece ZTpIaced-at the front end of 'the part 3 .is-provided with alraised part- 28 and with an extendinglip'i 9. Theextending lip rests just high :enough above the base :plate to permit the tongues I3 to slide'back and forth. The raised :part -29 extends from the front of the device to the rear of the openings l2 and'forms a'box like encasement '30.

Twopins3l are placedonthelippart 29 and carry coiledsprings 32 which are fixed at their 'otherends to the pins l5 on the plates'ortongues. rAs the pinsfi3'l on the lip part are to the front of the pins l5 on the rtongues the tongues are forced-forward toward and into the box part 30 and partly over the openings l2 in the base plate. The plateacan never beiforced m re tha ha f.

The pins 15 are placed onepands 'on the opening of the door.

holdingthe chain head piece. "door from the inside the knob must be turned, the

way over the openings 12 as in this position the springs become closed and occupy the complete distance between the pins l5 and 3!.

Thus the part 3 of the device has two tongues which extend normally part way over the openings l2 in the base plate but which can be forced backward in either of two ways. The first is by turning the key in the lock on the outer side of the door and forcing both tongues back at the same time; and the second is by turning in two directions the knob on the inner side of the door and forcing back each tongue individually.

The part 4 fixed on the door jamb comprises a case 33 carrying inside it a spring 34 and a chain 35' ancl a stop piece or latch block 36 fixed on the outside. .The case is placed on the door jamb in a position so that the stop piece or latch block 36 restsdirectly in line with one of the openings l2. As the case and the platform of the part 3 are of the same height, the piece 36 extends into the opening. l:2.

.The stop piece is provided with a grooved part 31 nearitsbaseand a sloping cone shaped head 38 corresponding and opposite to the beveledpart of one ofthe tongues, thus permitting the tongue to slide backward when theyxcontact on the shutting of the door. When the door is completely shut the. stop .piece extends upward into the box like encasement while theitongue is forced forward by its spring into the groove Of the .stop piece'and locks the door.

The spring .34 is attached at one end to "the part '4 and to the door jamb by a'screw 39 which extends through "the part 4 and spring into the door'jamb. Theother end of the spring is fastenedto the end of thelinked chain 35.

The free end of the chain extends'through an opening in the case and terminates in a head piece40similar to the stop piece 36. When the spring is contracted the chain is completely inside and the head piece rests on'the outside of the case near the stop piece.

The stoprpiece36is positioned directly in line with the other of the openings I1 and under the other tongue I3 and functions to-catch its tongue in the same manner as the head piece. However, this head piece and tongue combination will bar the doorinstead of locking it, the head piece and chain'running out of the case asthe spring ex- When the spring is expanded to its limit, the doorcannot be further opened until the knob is turned to release-the tongue from the head piece. When this is done, the spring 34 contracts and pulls the chain back into the case 33 until the head piece rests in its position on the outside of'case 33.

When the door is closed both tongues are caught in the grooves "31, one in thehead piece and one in the stop piece. When the door is opened from the inside the knob must be turned firstin the direction which will push back the tongue held in the stop or latch piece thus releasing the locking means and permitting the door to be opened to the extent of the chain. To open the door wide the knob must now be turned in the opposite direction from which it had previously been turned thus releasing the tongue Thus to open the door slightly opened, and the knob turned in the reverse direction. The door must be held opened between theturnings of the knob, otherwise on the second'turning the tongue co-acting with the stop piece is pulled forward by its spring and relocks the door.

The door is opened from the outside by turning the key in the lock which in turn through the extension and cam releases both tongues and permits the door to be opened widely at once.

When the door is shut both tongues are automatically slid into their grooves in the head and stop piece respectively and the door is latched or locked and the chain is ready to function as a barring means. Thus the normal position is for the door to be chained as Well as locked at all times.

A further modification in structure can be made by replacing the spring 34 with a weight or a leaf type of spring.

As the details described in the drawing show only one form of my invention and since many changes and modifications may be made in the same invention without changing or departing from the spirit and scope of the idea, I desire to cover all modifications, forms and embodiments coming within the language or scope of any one or more of the appended claims.

I claim:

1. A locking and barring mechanism for a door consisting of a chain, a spring attached to the chain and to the door jamb, a headpiece on the chain provided with a groove, a stop piece on the door jamb provided with a groove, two reciprocable movable tongue mechanisms on the door, two spring mechanisms forcing the tongues into the grooves of the headpiece of the chain and stop piece, roll back means for individually releasing said tongues by reverse movement of said roll back means.

2. A locking and barring mechanism for a door consisting of a chain, a spring attached to the chain and to the door jamb, a headpiece on the chain provided with a groove, a stop piece on the door jamb provided with a groove, two oppositely movable tongue mechanisms on the door, two spring mechanisms forcing the tongues into the grooves of the headpiece of the chain and stop piece, turning means capable of releasing only individually the tongues by reversing the direction of operation of the turning means.

3. A locking and barring mechanism for a door consisting of two parts, one attached to the door jamb having a chain, a spring attached to the chain and to the part, a headpiece on the chain provided with a groove, a stop piece provided with a groove, and the other said part attached to the door having two reciprocable tongue mechanisms, two spring mechanisms capable of forcing the tongues into the grooves of the head piece of the chain and the stop piece, reversely movable releasing mechanism operable from the inner side of the door adapted by reverse movement, to, individually and consecutively release the tongues, key operated lock means extending through the door from the outer side, a connecting bar on and operated by said lock means for releasing both the tongues from their grooves practically simultaneously.

4. Locking and barring mechanism for a door comprising one part attached to the door jamb and the other part attached to the door, the part attached to the door jamb having a fixed head piece with an opening therein and a limitedly movable head piece having an opening therein, the part attached to the door having a tongue capable of entering the opening in the fixed head piece, a spring forcing the tongue piece into the opening in the fixed head piece, a second tongue capable of entering the opening in the limitedly movable head piece, a second spring forcing the second tongue into the opening in the limitedly movable head piece, projecting pins on said tongues, arm means pivotally mounted between the pins of the tongues and capable of forcing the tongues backward to release both the said tongues from said locking and barring means the turning of the arm mechanism in a clockwise direction striking the pin of the first tongue, to push the tongue back and release it from the fixed head piece, and the turning of the arm mechanism counter-clockwise striking the pin of the second tongue mechanism to push the tongue back and release the tongue from the limitedly movable head piece.

5. Locking and barring mechanism for a door comprising one part attached to the door jamb and the other part attached to the door, the part attached to the door jamb having a fixed head piece with an opening therein and a limitedly movable head piece having an opening therein, the part attached to the door having a tongue capable of entering the opening in the fixed head piece, a spring forcing the tongue piece into the opening in the fixed head piece, a second tongue capable of entering the opening in the limitedly movable head piece, a second spring forcing the second tongue into the opening in the limitedly movable head piece, a projecting part on each of the tongues, arm means pivotally mounted between and capable of contacting with said projecting parts on the tongues to force the tongues backward to release them, a second projecting part on each of the tongues, a cam pivoted between the tongues and operable against the second projecting parts so as to release the tongues from their respective head pieces and a lock means for operating said cam.

6. A locking and barring mechanism for a door comprising holding parts on the door jamb and tongue parts on the door, arm mechanism pivoted between and capable of retracting the tongues from the holding parts, knob mechanism attached to the arm mechanism substantially at its pivotal point capable of operating the arm mechanism first in a clockwise direction to retract one tongue and in a counter-clockwise direction to retract the second tongue, and spring mechanism extending between the door and the tongues and capable of returning the tongues to a normal advanced position when they have been retracted by the arm mechanism.

'7. A locking and barring mechanism for a door consisting of a chain, a spring attached to the chain and to the door jamb, a headpiece on the chain provided with a groove, a stop-piece on the door jamb provided with a groove, two reciprocable tongue mechanisms on the door, two spring mechanisms forcing the tongues into the grooves of the headpiece of the chain and stoppiece, a reversely movable element to individually retract said tongues from said grooves.

8. A locking and barring mechanism for a door consisting of a chain, a spring attached to the chain and to the door jamb, a headpiece on the chain provided with a groove, a stop piece on the door jamb provided with a groove, two reciprocable tongue mechanisms on the door, two spring mechanisms forcing the tongues into the grooves of the headpiece of the chain and stop-piece respectively, a reversely rotatable element for successively releasing said tongues by reverse movement.

9. A locking and barring mechanism for a door comprising two parts, one attached to the door jamb having a chain, a spring attached to the chainiand to the part/a headpiece 'on the chain provided with an opening therein, a stoppiece provided with 'an openingtherein, and the other said part attached to the door having two reciprocable tongue mechanisms, two spring mechanisrnscapable of forcing'the tongues into the openings of the headpieceiof the chain and the stop piece respectively, reversely movable releasing mechanism operable from the inner side of the door adapted "by reverse movement to individually and consecutively release the tongues, key operated lock means extending through the door towards the outer side, a connecting bar on and operated by said lock means, and a cam means operable by said lock means to release both of the tongues from said openings practically simultaneously.

10. A locking and barring mechanism for a door, comprising two tongues on thedoor, projections on said tongues, a single reversely rotatable element, a projection on said element, said element with its projection being located intermediate of the projections on the tongues, and

said element with its projection being'located intermediate of theprojections on the tongues, and co-operating with the projections on the tongues'to retract the tongues individually and.

successively, a holding element on the door jamb co-acting with one of the tongues to hold the door in a'closed position, and a spring retracted barring element on the door jamb, said-spring retracted barring element coacting with the other,

tongue to hold the door in partly opened position.

12. A locking and barring mechanism for a door, comprising two tongues on the door, projection's on'the tongues, a hand-actuated element,

extensions on saidelement, said extensions being adjacent to and capable'of co-operating with the projections on said tongues, and said element being positioned intermediate of the projections on the tongues and operable in reverse directions to force backward one tongue to the releasing position by turning in one direction and the other tongue by turning in the opposite direction.

SYLVAN ENGEL.