US2132606A - Lock construction - Google Patents

Description

C. COU'RTNEY LOCK CONSTRUCTION Oct. 11, 1938.

Filed Feb. 25, 1955 2 Sheets-Sheet l BY QM, amv/Q4...

ATTORNEYS.

oct. 11, 193s.

c. COURTNEY LOCK CONSTRUCTION Filed Feb. 25. .1955

2 Sheets-Sheet 2 ATTORN EYS Patented Oct. 11, 1938 iliztt UNITED STATES PATENT LOCK CONSTRUCTION Charles Courtney, New York, N. Y. Application February 23, 1935, Serial No. 7,699

20 Claims.

This invention relates to lock construction. One of the objects of this invention is to provide a simplainexpensi've and thoroughly practical lock construction. Another object is to 52 provide a construction of the above nature characterized by adaptability and versatility. Another object is to provide a bolt operating mechanism comprised of but few simple and inexpensive parts which may be'rapidly manufactured 10Vy and readily assembled. Another object is to provide a mechanism of the above character which is sturdy and durable and the direction of operation of which is reversible. Another object is to provide a construction of the above nature Il capable of indicating audibly and visibly irnproper manipulation, as for example, the forcing of the lock. Other objects will be in part apparent and in part pointed out hereinafter.

The invention accordingly consists in the fea- 2()V turesof construction, combinations of elements and arrangement of parts as will be exemplified in the structure to be hereinafter described and the scope ofthe application of which will be indicated in the following claims.

2:5` In the accompanying drawings, in which is shown a preferred embodiment of my invention,

Figure 1 is a front elevation on a smaller scale of my lock secured to a door, the bolt mechanism being indicated in a dotted line position;

VFigure 2 is a rear elevation of my lock installed on a door, certain parts of the lock casing being broken away` to show the bolt mechanism;

Figure 3 is a sectional View taken along line 3-3 of Figure2;

35. Figure 4 is a side elevation partly in section and partly broken away to show certain of the operating elements;

' Figure 5 is a rear elevation taken along the line 5-5 of Figure 4;

Figure 6 is a rear line 6-6 of Figure 4.

Similar reference characters refer to similar partsthroughout the various views of the drawings.

Referring rst to Figure l., a door HJ or the like has mounted thereon a front face plate Il through which extends a door knob l2 and other bolt or latch operating parts. As is more clearly shown in Figure 3, a door jamb i5 limits the swing 50 of door il) which, when in its closed position,

registers with a wall or partition i3d to which the door is to be locked.

A suitable key-controlled mechanism l5 (Figure 3) is so related to the door as to be accessible 55 from the outside face thereof. Mechanism, l5)

40: elevation taken along the may have an escutcheon plate it abutting face plate ll, mechanism i5 lila in door i5, and being secured to being received in a hole front face plate il by a pair of screws I5 threaded through a pair of bosses il integrally formed with the 5 housing of mechanism i5. Screws l5 preferably force a U-shaped plate i8 (Figure 5) against the rear of front face plate ii (Figure 3) to clamp escutcheon plate i4 against front plate Il and thus secure mechanism i5 in place. As is more clearly shown in Figures 2, 3, 4 and 5,

a rear plate I9 is held in assembled relation with door iii and front plate H by a suitable number of screws 25 (Figure 2 or 5) extending through rear plate l5 and preferably threaded into a like number of posts 2l (Figure 4) extending through door Il), posts 2| being secured at their to front plate il. Thus,

other ends front plate il and rear plate i5 are clamped against opposite sides of door I@ in such a manner as to effectively support the various operating members of the lock.

Referring again to Figures 2 and 3i, a pairof substantially rectangular plates 22 are secured as by rivets or the` like (not shown) to rear plate to form a chamber 25 held apart by a spacing bar 3l at the left hand jections 23 2) having threaded A suitable secured to by suitable screws 25 threaded in which a 3() 2i, is slidably disposition, as better i keeper 28 5a, and 28a it is opertion.

of parallel which are end (Figure 3) and by superimposed spacing plates 33 at the right hand end. Suitable rivets 54 or the like extend through the plates and spacers to secure the several parts together as a unit. There is thus formed a space between the plates 29 and 30 for a purpose later set forth.

Spacing plates 32 and 35 preferabl sociated therewith an extending lug y have asor stop 35 (Figure 2) adapted to limit the travel of bolt 21 in bolt retracting direction by abutting against 5() projection 23 when bolt 2l is withdrawn from its locked position. Preferably stop 35 has a recess 35a to provide a clearance for the end of screw 25 when stop 35 lug 35 also has formed on the other o abuts projection 23.

Stop or r left hand 65 side thereof a cam recess 35o, the purpose of which will be described hereinafter.

Disposed between plates 23 and 33 and thus within the hollow of bolt 2l is a part generally indicated at 33, being pivoted as by a pin 3'! carried by plates 2Q and 30 (Figure 2). Part 33 preferably has suitable projections comprising an actuating arm 33a, a stop arm 361), a locking arm and a cam cavity 35d, the purpose of which will be pointed out hereinafter, and the part conveniently having, therefore, a shape like that shown in Figure 2. A part, generally indicated at 38 (Figure 2), is mounted to pivot about the axis of a pin 39 bridged across the space between plates 23 and 3?, and comprises a stop arm 38a, a cam portion 33h, a cam portion 38c and a locking arm 38d, the purpose of which will be pointed out hereinafter, part 38 thus having a shape like that shown in Figure 2.

Preferably, plates 29 and 30 are provided with openings 29a (Figure 2) and 30a (Figure 3) having extensions or recesses 2Gb and 33h respectively, these openings in the two plates being similar in shape. Thus arm 36a of part 33 lies between and is accessible through recesses 2Gb and 33h so that a projection or crank pin 49 (Figure 2) normally extending through opening Sila of part 33 will, when moved into recess or opening 33h, abut against arm 33a to swing part 36 in counterclockwise direction, as viewed in Figure 2. As part 33 swings, it imparts clockwise rotation to part 38 because of the coaction of cam cavity and cam portion 38o, thus causing the locking arms 355e and 33d (projecting from the upper and lower sides of bcltas viewed in Figure 2) to recede or be withdrawn into the space between plates 23 and 33, into the bolt 2l, and thus moved out of engagement with the inside wall of keeper 23, hence conditioning bolt 21 for withdrawal or retraction from keeper 28 upon furtherrnovement of crank pin 40 in clockwise direction as viewed in Figure 1.

A pair of lugs 29o and Soc (Figures 2 and 4) project (lower right-hand part of Figure 2) from plates 29 and 36 and have pivotally mounted therebetween, as by a pin die, a lever generally indicated at di having an end portion 4in extending toward the left (Figure 2) and bearing against cam 33h on part 33. Lever 4l conveniently takes the form of a bell crank lever and its other arm :lib suitably receives one end of aspring 42, the other end of which is secured to 33a of part 38 whereby spring 42 biases lock arm 38d and consequently lock arm Stic into their extended or locking position in relation to or in back of the wall of keeper 28, as illustratively shown in Figure 2.

Arm flic, at its extreme left end (Figure 2), acts as a stop to limit the extent to which the parts 33 and 33 are swung or held in clockwise and counterclockwise directions, respectively, about their pivots 3'! and 39, and hence also the extent to which the lock arms 33o and 38d are projected out of the bolt 21.

Preferably, I provide a lug 4to, on lever 4l (Figure 2) to retain bolt 27 in its locked or unlocked position, and this, by a coaction with a lug or stop-like projection 43 (Figures 2 and 4) extending at right angles from plate 44, which is suitably secured to plate I9. Thus, when parts 33 and 33 are swung against the bias of spring 42, cam 38o bears against end portion or arm 4ta of lever 4i, forcing lug 4to away from bolt 21 to permit lug 4to to pass projection 43 as the bolt is moved, lug dic thus riding into a position at one or the other side of the fixed abutment or projection 43, depending upon whether bolt 21 is projected or withdrawn, thereby blocking further movement by bolt 2l and holding it in either projected or withdrawn position. Thus, upon completion oi withdrawal of the bolt 21 into the casing, the detent lug 4lc becomes positioned to the right of the xed abutment 43 and these parts thus hold the bolt against movement in projecting direction; however, upon completion of projecting movement of the bolt 2'1 and into the relationship shown in Figure 2, the detent lug lic becomes positioned to the left of the abutment 43 and holds the bolt against movement in the direction of withdrawing it into the casing. In this latter relationship of the parts, however, and as is best shown in Figure 2, another lug or projecting portion 4 ld of the lever 4| becomes positioned to the right of the fixed abutment 43 but spaced therefrom by an appropriate distance of the order indicated in Figure 2; thereby, and for purposes later pointed out, the bolt 27 may partake oi an additional movement in projecting direction (toward the left as viewed in Figure 2) by an amount corresponding to the above-mentioned distance or spacing between the parts d3 and did. In this latter connection, it will be noted, also, that, with the bolt normally projected as shown in Figure 2, the stop arms 36h and 33a of the members 36 and 38 assume positions spa-ced somewhat to the right of the lefthand casing parts, such as the parts 23, 23, thereby also permittineI the above-mentioned additional movement of the bolt in bolt-projecting direction, but positively precluding a complete movement of the bolt 21 entirely out of the casing.

Preferably, means are provided for operating bolt 2li from either side of door IB. Accordingly, an operating bar I5a is secured to the key-rotated plug I 5b (Figures 1 and 3) of the key mechanism l5 and is rotatable therewith. Bar Eea extends into a slot 41 formed in a bushing 43 rotatably carried by rear plate i9 in a hole i3d extending therethrough. v Y

Secured to bushing 48 is a crank disk 49 (Figure 3) which carries crank pin 40, and, as already described above, crank pin 40 actuates, in coaction with the spring 42, arm 36a as it enters or leaves recess 39h in plate 30. Thus, when the proper key is inserted into plug |5b and turned, bar lea rotates disk 49 (clockwise, in Figure 2) which in turn brings crank pin 40 to bear against arm 35a of part 36. Parts 36 and 38 are thus swung in opposite directions, against action of spring 42. to withdraw locking arms 35o and 38d from the back of the wall of keeper 28, crank pin de entering the plate recess 30h and the swinging of part 38 causing cam 38h to force lever 4| away from the bolt to permit the passage of lug or detent Mc past projection 43.

As crank disk 49 continues to rotate (clockwise, Figure 2), crank pin 40 thereon, having entered recess 33h in bolt 21, bears against the righthand wall of recess 301) (as viewed in Figure 2) to force and move bolt 21 to the right until stop lugs 35 thereon abut projection 23. Just before this point is reached, however, crank pin 40 rotates out of recess 301), thus releasing arm 35a and accordingly parts 35 and 38. Hence, due to the bias of spring 42, lock arms 35o and 33d are again projected out from the space between plates 29 and 30 of the bolt 2l, but by now they and the bolt are withdrawn into the casing so that their lateral projection from the bolt takes place inside the casing, not inside the keeper 28; and lever 4I is released and shifted so that lug 4Ic now lies to the right (instead of to the left) of projection 43 and acts as a stop against a casual or unintentional throwing of the bolt.

Thus, the bolt-withdrawing operation, as controlled by a key from the exterior of the door, is concluded. To project the bolt structure into doo-rlocking position the key-controlled mechanism, and accordingly the crank pin 40, is rotated in reverse direction, thus bringing about a reverse sequence of the operations just described.v

It may now be seen that a double locking engagement is established between casing 24 and keeper 28. Inasmuch as bolt 21 extends through openings 28a and 26a of the keeper and casing respectively,r swinging of door I8 is restrained, and as locking arms 36e and 38d extend beyond the limits of opening 28a and. in back of and along the inside of thewall of keeper 28, bolt 21 is `held against retraction.

To permit the operation of the bolt from the inner side of door I8 I preferably provide asuitable handle 50 or the like (Figures 3 and 4) mounted on a disk 5t bearing against vthe top of casing 24. A shaft52 secured to handle 50 is rotatably received through a hole 24a in casing and has secured to the lower end thereof (Figure 3) a disk 53 from which extends a pair of projections forming crank pins 54 and 55. Two inwardly projecting pins 56 are secured to the top wall of casing 24 (Figure 3) and extend rearwardly through oppositely disposed holes in a washer 51 and a resilient washer 58. Resilient Washer 58 actsKas a spring to force washer 51 against disk 53, thus creating a friction therebetween.

As is more clearly shown in Figure 4, two shallow depressions 53a and 53h are provided in disk 53 and into these depressions pins 56 drop when registering therewith, thus determining the position of handle 55 in either of its two extremities of rotary movement.

When handle 5B is rotated crank pin 55 enters recess 29h of bolt plate 29 (Figure 2) and also bears against arm 36a, as pointed out above with respect to crank pin 48, and operates the bolt in substantiallysimilar manner. As crank pins 54 and 55 are in no way connected with crank'pin 4D, the bolt can be operated by either without interference therebetween'.

Under certain conditions I have found it preferable to provide an audible and a visible signal to indicate an improper or illegal or attempted operation of the lock. Illustratively, I provide an audible signal, as for example a mechanically or spring-operated bell generally indicated at 58 (Figures 2, 4 and 6). As is more clearly shown in Figure 4, bell B is preferably received in a hole lila of door Ill and is secured to front plate II, bell 68 and its operating parts being covered by rear plate I9. As is more clearly shown in Figures 4 and 6, bell 5l) includes a casing 6I which houses a coiled spring (not shown) which, when released, actuates a train of gears generally indicated at 62 (Figure 5).

Gear train 62 is held inoperative preferably by a double-toothed detent or escapement 6-3 to which is attached a resilient bar or spring 64, at one end of which is mounted a clapper 65. A detent 53 is pivotally mounted on a pin 53a secured to the top of casing 6I and has an arm 631) normally retained against movement by a springbiased stop 18, as pointed out hereinafter.

When arm 63h is free to move, escapement 63 is also free to pivot, which it does under the influence of gear train 52 and its actuating spring. Thus, release of arm 63h releases the gear train and the coil spring and a rapid pivotal reciprocation is imparted to escapement B3, which in turn is imparted to clapper 65 against a gong 58 of bell 60.

As mentioned above, bell B is not sounded unless the lock has been improperly tampered with, as for example when it is being attempted to be forced by a burglar or the like. Thus, if bolt 21 is being improperly forced, as by the insertion of a tool such as a jimmy, between door IIJ and door frame I3a (Figures l, 2 and 3) there results a separating movement between keeper 28 and lock casing 24, thus bringing about a relative movement therebetween in bolt-projecting direction and causing lock arms 36C and 38d to take in back of the keeper wall, also a movement between bolt 21 and its casing 24. Bolt 21 is hence displaced to the left of the position shown in Figure 2 so that cam portion 35h on stop 35 bears against a lug 61a (Figures 2 and 4), which projects at right angles from a plate 61 mounted on a tubular shaft 88 (Figure 4) secured to a bushing B9 pivotally mounted in rear plate I5, as is more clearly shown in Figure 4.

As is better shown in Figure 2, plate 51 has an arcuate slot 61h therein, through which extends a pin 10 secured to rear plate I9. A lug 61e extends `from plate 51 and is embraced by the ends of a spring 1I, the body of which is preferably Wound about hollow shaft 58 (Figures 2 and 4). Thus, spring 1I constantly biases plate 6l against displacement from its neutral positon.

As is more clearly shown in Figure 4, bushing 69 has a square bore 69a which slidably receives a square bar 12, the end of which is seated in and secured to a bushing 13 rotatably mounted in a bore 14 in plate II. An eccentric or double acting cam 15 is mounted on bar 12 to be rotatable therewith to bear against and cause linear translation or up and down movement of a part 15 (Figure 5) toward or away from the bell 58, part 16 and eccentric 15 being held in position against the rear surface of front plate II by a plate 11 and a screw 18 threaded into front plate I I. Part 1'6 is plate-like and is vertically slotted (see Figures 4, 5 and 6) so that it may move up and down relative to the screw 18. It has an armlike extension 16a which, when part 16 is raised, abuts against and lifts a spring-biased stop 19 (Figure 5) up and away from arm 63h of escapement detent 63, thereby to free the latter.

Thus, when cam bears against lug Bla (Figure 2), plate B1 is turned, this rotation being translated into a linear or upward travel of part 1'6 (Figure 4) by means of bushing 59 turning shaft or bar 12, which in turn swings or rotates cam 15 to lift plate 15. Arm 16a of part 16 lifts the spring-biased stop 19 (Figure 5), which holds escapement 63 stationary (Figure 5) thereby releasing the escapement mechanism and the energy of the spring motor effects a ringing of the bell as described above and accordingly gives audible notice of the improper operation of the lock. Thus, a marauder or burglar having his work. thus accompanied by a loud bell ringing over which he has no control, quickly ceases his nefarious operation.

Preferably I provide a knob 88 (Figure 4) secured to a preferably hollow shaft IH rotatably mounted in bearing I9b formed on rear plate I9. A key bar 82 is connected to the coil spring in-bell 60 and to shaft 8I. Thus, rotation of 2l with resultant actuation,

knob winds up the spring for actuation of bell 8@ so that the latter may be maintained in condition for proper signaling. Y

As pointed out above, I preferably provide a visible signal in addition to the audible Vsignal already described.. As is more clearly shown in Figures 4, 5 and 6, a tubular shaft Sil is pivotally mounted upon a stud 84 having an end Stia threadedinto front plate Shaft 83 has formed on one end thereof a projection or arm 85 which bears against an edge 'ltb of part l@ (Figures 5 and 6). Thus, when motion is imparted to part '16, as pointed out above, arm 85 is forced away from the lineof travel of part '16, thus causing the pivoting of shaft 83. As shaft 83 pivots an arm Si? preferably secured to the other end of shaft $33 swings. Pivotally mounted on the free or upper end of arm is a catch 8'? having a sloping face Sla. A spring 88 secured to arm 8E by pins ad or the like constantly biases catch 8'! in a clockwise direction.

A nag E@ having a colored portion Sila is mounted on a shaft Si (Figures 4 and 6) pive otally received in a suitable bearing in rear plate i9, the latter having an aperture lac (Figure 2) normally closed by the uncolored portion of the flag Sil. YFlag 9% tends by its weight to swing counter-clockwise as viewed in Figures 2 and 6 toward and against a stop pin projecting inwardly (Figures 4 and 6) from the wall plate i9. A loop or catch 9th (Figure 6) is prefern ably integrally formed with flag all and; catches under the tongue Sib on catch Sl and holds flag gli in non-signaling position. IThus, whenv arm Si: is swung as pointed out above, rojection Bib is swung (to the left in Figure 6) away from catch SGD and iiag SIB is permitted to drop, whereby colored portion Sila becomes visible through hole ic (Figure 2) in rear plate toindicate that an attempt has been or is being made to force the lock. The signal thus also indicates that the spring of the bell mechanism may require rewinding.

To restore ag 9o to its non-indicating posi-V tion I preferably provide a knob 92 on a shaft (Figure 4). When knob 92 is turned in a clockwise direction (Figures 2 and Ll) ag @il is raised, causing loop t?) to bear against sloping edge 87a (Figure 6) and causing catch Si to pivot against the bias of spring B8. the bottom of latch or tongue ilb registers with the top of loop 95h, catch 8l snaps to the right and over the top of loop 9th and thus holds flag d in a raised position. Preferably, I provide a pair of stop pins 9d (Figure 6) secured to rear plate i9 to limit the swing of arm SG in one direction, shaft 9| acting to limit its swing in the other direction, and thus I insure that arm 8% will not swing so far in either direction as to escape the action of loop 99h when the flag is returned by knob 92 to its raised or non-indieating position.

However, another coacting feature of my invention comes into play in response to an attempted forcing of the lock. I have already above described in detail how, referring now to Figure 2, any attempt to jimmy the lock or force the keeper 28 and the door or Y lock casing 24 apart results in a separating'movernent inV a direction toward the left, as viewed in Figure 2, of the opposite or built-up bolt structure by the engagement of the member V35 with the cam portion Ela, whereby the audible and visual signals are put into immediate actuation; at the same time,

When

' as described above.

ber il and moves-the latter into engagement with the fixed contact mi, thereby to close a circuit of whichconductors lo? and |93 form a part.

Switchimember la may be in the form of a relief spring which, with the fixed contact spring itl, is insulatingly mounted in any suitableway, as is diagrammatically indicated in Figure 6 at |134, upon the inside face of the rear plate ii, any suitable means (not shown) being provided to insulatingly carry the conductors |62 through the plate'l or through the door, from which they may be expanded to any suitable point, as is illustratively about to be described. The contact spring lili! is suiiiciently light to be brought into and held in engagement with the hxed contact lol by the lug 99 and the weight of the flag SQ, restoration of the latter as abcve'described, as by way of the handle or knob 92 (Figure 4), removing the lug SS from engagement with the circuit-closing switch and thereby restoring the circuit |92-ll3 to normal condition. Of course, it will be recalled that the knob 92 for such restoration purposes can be actuated only from the inside of the door.

The conductors IGZ-|03 lead to any desired or suitable and appropriately located signal deu vice which may be, for example, visual or audible or both, and where a number of doors, such as in oiiice buildings, apartment buildings and the like, are to be monitored in accordance with my invention, the conductors |U2-|il (duplicated, cf course, for .each door) preferably lead to a central Vstation. or central signaling station as is generally indicated at |95 in Figure 5.

The station |05 may be in the form of an annunciator provided with as many drops or signals Sl, S2, S3, etc., as there are doors or door locks to be monitored. The station 05 may also include Yan audible signal diagrammatically indicated at |853 so connected with a suitable source of current |32 and with the windings of the drops Si, S2, etc., (substantially as shown in Figure 6) that, when the switch lllD-Hll of any door, for example, the door mechanism shown at the right in Figure 6, or duplicated door mechanisms only two of which are diagraminatically indicated in Figure 6 at |08 and IBS, the corresponding visual signal or drop SI, S2, as the case may be, as well as the audible signal |66 is actuated, remaining actuated so long as the switchY it-lill of the particular door mechanism remains in actuated position. Accordingly, I am enabled to give an alarm at a central point or station, the alarm identifying the locationV of the lock mechanism being tampered with so that thereby whatever is necessary to be done may be done.

Under certain circumstances it may be desired that the action of bolt 2'! be in directions the reverse of thoseV pointed out above. For example, if door lll is hinged to swing oppositely from the direction of swing indicated in the drawings, bolt 2l should slide to the right to assume its locked position in contra-distinction to its locking action To provide for this reversal, bolt 27 is so constructed that it may be lifted bodily and turned over in order that plate 3G thereof is uppermost and plate Z is borne by plates 22, l5 and 46 (Figures Zand 3). As casing 24 is also reversible, opening 26a therethrough may be registered with bolt 21 and the operation will be substantially similar to that pointed out above with the exception that crank pin 54 now bears against arm 36 to operate the bolt and cam 35h on stop 35 bears against a lug 51d substantially similar to lug 61a to operate the signals when the lock is being forced.

Thus it will be seen that there has been provided in this invention a lock mechanism in which the various objects hereinbefore set forth, together with many thoroughly practical advantages, are successfully accomplished. It will also be seen that the lock is simple and inexpensive in construction, versatile through its reversibility, practical in operation, reliable in its sturdiness andan eicient safeguard through its signaling devices. Moreover, the lock is further characterized by space-saving compactness in proportion to its size, which facilitates ready installation.

Asmany possible embodiments may be made of the above invention, and as many changes might be made in the embodiment set forth above, it is to be understood that all matter hereinbefore described or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

I claim as my invention: 1. In lock construction, in combination, a twopart casing having a base portion provided with means for slidably guiding a bolt beyond either of two opposed ends of said base portion, a bolt slidably carried by said base portion and capable of beingreversed end for end and to coact with said guiding means for projecting movement beyond either of said ends of said base portion, and

closure means for completing the casing and for enclosing said bolt, said closure means being provided with an apertured end wall and a closed end wall each adapted to coact with either of said ends of said base portion depending upon whether or not said closure means is reversed end for end to correspond with the position given said bolt, and means for securing said closure means and said base portion together.

2. A lock construction as claimed lin claim l in which said closure means carries means operable from the exterior thereof for controlling the projection or retraction of the bolt, and in which the bolt is provided with means to coact therewith in either of the two positions that may be given the bolt.

3. A lock construction as claimed in claim l in which the base portion is provided with means to coact therewith in either of the two positions that may be given the bolt.

4. In lock construction, in combination, a casing having slidably mounted therein a bolt made up of two separate outer sheet metal members provided with means for holding them together and in spaced relation, and auxiliary bolt means positioned between said sheet-like members and provided with means for movably mounting said auxiliary bolt means for movement relative to said spaced members, and mechanism carried by said said bolt, a stop related to said casing, a detent movably carried by said bolt for coaction with said stop, a member movably carried by said bolt and havingV a portion positioned inthe path of movement of said crank pin as the latter moves relative to said bolt recess, and operating connections between said member and said rstmentioned means and said detent for effecting actuation of said first-mentioned means and said detent in response to actuation of said member by said crank pin,

6. In lock construction, in combination, a casing having slidably mounted therein a bolt forv projection into the opening in a keeper wall, said ,bolt having means capable Aupon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, said bolt having a recess and said casing rotatably carrying means having a crank pin engageable in said recess for thereby projecting or withdrawing said bolt, a stop related to said casing, a detent movably carried by said bolt for coaction with said stop, said first-mentioned means having an extension positioned in the path oi movement of said crank pin as the latter moves relative to said bolt recess for thereby effecting actuation of said first-mentioned means, and operating connections between said extension and said detent for effecting actuation oi the latter in response to actuation of said extension by said crank pin.

7. In lock construction, in combination, a oasing having slidably mounted therein a bolt for projection into the opening in a keeper wall, said bolt having means capable upon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, said bolt having a recess and said casing rotatably carrying means having a crank pin engageable in said recess for thereby projecting or withdrawing said bolt, a stoprelated to said casing, a detent movably carried by said bolt for coaction with said stop, said first-mentioned means comprising an auxiliary bolt-like member having an extension positioned in the path of movement of said crank pin as the latter moves relative to said bolt recess, means pivotally mounting said bolt-like member to said bolt, and operating connections between said pivoted bolt-like member and said detent for eiecting actuation of the latter in response to actuation of said extension by said crank pin.

8. A construction as claimed in claim 7 in which said operating connections comprise a rotary member carried by said bolt and interposed between said pivoted bolt member and said detent, and means for eiecting vrotary movement of said rotary member in response to pivoting movement of said pivoted bolt member.

9. A construction as claimed in claim 7 in which said operating connections comprise a rotary member carried by said bolt and interposed between said pivoted bolt member and said detent, and means for effecting rotary movement of said rotary member in response to pivoting movement of said pivoted bolt member, said rotary member having a bolt-like extension which, in accordance with the direction of rotary movement of said rotary member, is moved into or out of position in back of said keeper wall.

10. In lock construction, in combination, a casing having slidably mounted therein a bolt for projection into the opening in a keeper wall, two members pivotally mounted on said bolt and having respectively bolt-like extensions capable upon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, means operatively connecting said two Y members whereby actuation of one is transmitted' to effect actuation of the other, bolt-actuating means carried by said casing and operating connections therebetween and said bolt and at least one of said two members for eiecting proper sequential actuation thereof, stop means, detent means for coaction with said stop means, and operating connections between one of said members and said detent means.

l1. In lock construction, in combination, a casing having slidably mounted therein a bolt for projection. into the opening in a keeper wall, two members pivotally mounted on said bolt and having respectively bolt-like extensions capable upon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, means operatively connecting said two members whereby actuation of one is transmitted to eiect actuation of the other, bolt-actuating means carried by said casing and operating connections therebetween and said bolt and at least one of said two members for effecting proper sequential actuation thereof, stop means carried by said casing, detent means movably mounted on said bolt, operating connections between one of said members and said detent to effect actuation oi the latter in response to movement of said bolt-operating means, and spring means connected between one said members and said detent means for effecting a spring-biasing of both of said members and of said detent means.

l2. In lock construction, in combination, a two-part casing having a base portion provided with means for slidably guiding a bolt beyond either of two opposed ends of said base portion, a bolt slidably carried by said base portion and capable of being reversed end for end to coact with said guiding means for projecting movement beyond either of said ends of said base portion, said bolt having means projectable laterally thereof in back of thewall of a keeper through whose opening the bolt is projected, and closure means for completing the casing and for enclosing said bolt, said closure means being provided with an apertured end wall and a closed end Wall each adapted to coact with either of said ends of said base portion depending upon whether or not said closure means is reversed end for end to correspond with the position given said bolt, said bolt having means projecting therefrom and positioned thereon at such a point that, when said rst-mentioned projectable means is projected in back of the keeper wall, it is spaced from said end wall, thereby to provide limited movement of said bolt along said guiding means and beyond such position in which said rst-mentioned projectable means engages in back of said keeper wall; and means for securing said closure means and said base portion together.

13. In lock construction, in combination, a casing having slidably mounted therein a bolt for projection into the opening ina keeper wall, said bolt having means capable upon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, operating means for projecting said bolt into the keeper opening and for actuating said rstmentioned means to engage in back of the keeper Wall, detent means and coacting stop means, means for actuating said detent means to coact with said stop to prevent withdrawal movement of said bolt upon completion of the projection thereof as aforesaid, and stop means carried by said bolt' for coaction with said casing but positioned so as to permit a certain limited sliding movement of said bolt beyond its projected position as aforesaid.

14. In lock construction, in combination, a casing having slidably mounted therein a bolt for projection into the opening in a keeper wall, said bolt having means capable upon Vactuation to engage in back of the keeper wall to prevent movement of said bolt out of 'said keeper opening, said bolt having a recess and said casing rotatably carrying means having a crank pin engageable in said recess for thereby projecting or withdrawing said bolt, a stop related to said casing,r a detent movably carried by said bolt for coaction with said stop, a member movably carried bysaid bolt and having a portion positioned in the path of movement of said crank pin as the latter moves relative to said bolt recess, operating connections between said member and said first-mentioned means and said detent for effecting actuation or" said first-mentioned means and lsaid detent in response to actuation of said member by said crank pin, said member having a projecting stop portion positioned with respect to said casing' but so that, upon completion of projection of said bolt, the latter may partake of a certain limited additional movement relative to the casing in bolt-projecting direction.

l5. In lock construction, in combination, a casing having slidably mounted therein a bolt for projection into the opening in a keeper wall, said bolt having means capable upon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, said bolt having a recess and said casing rotatably carrying means having la crank pin engageable in said recess for thereby projecting or withdrawing said bolt, a stop related to said casing, a detent movably carried by said bolt for coaction with said stop, a member movably carried by said bolt and having a portion positioned in the path of movement of said crank pin as the latter moves relative to said bolt recess, operating connections between said member and said rstmentioned means and said detent for effecting actuation of said inst-mentioned means and said detent in response to actuation of said member by said crank pin, said detent and stop'coacting, upon completion of projecting movement of said bolt, to prevent withdrawal movement of said bolt while permitting a certain limited additional movement in bolt-projecting directionV of the bolt relative to said casing. Y

16. In lock construction, in combination, a casing having slidably mounted therein a bolt for projection into the opening in akeeper wall, said bolt having means capable upon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, said bolt having a recess and said casing rotatably carrying means having a crank pin engageable. in said recess for thereby projecting or withdrawing said bolt, said crank pin having a range of movement such that, upon completion of projecting movement of said bolt and of said inst-mentioned means it withdraws from said recess, said bolt carrying stop means for coaction with a stationary part related to said casing but spaced therefrom to permit a subsequent additional movement of said bolt in bolt-projecting direction.

17. In lock construction, in combination, a casing having slidably mounted therein a bolt for projection into the opening in a keeper wall, twomembers pivotally mounted on said bolt and having respectively bolt-like extensions capable upon actuation to engage in back of the keeper Wall to prevent movement of said bolt out of said keeper opening, `means operatively connecting said two members whereby actuation of one is transmitted to effect actuation of the other, boltactuating means carried by said casing and operating connections therebetween and said bolt and at least one of said two members for effecting proper sequential actuation thereof, said operating connections including lost motion connecting means permitting movement of said bolt beyond its normal projected position, and stop means limiting the extent of said additional bolt movement.

18. In lock construction, in combination, a casing having slidably mounted therein a bolt for -projection into the opening in a keeper wall, said bolt having means capable upon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, operating means for projecting said bolt into the keeper opening and for actuating said firstmentioned means to engage in back of the keeper wall, said operating means including a disconnectable connection with said bolt that becomes disconnected upon said bolt having been projected and said first-mentioned means actuated into position in back of the keeper wall, and stop means coacting between said bolt and said casing but relatively positioned to permit a certain limited additional movement of said bolt in boltprojecting direction to take place.

19. In lock construction adapted to have associated therewith a signaling means, in combination, a casing having slidably mounted therein a bolt for projection into the opening in a keeper wall, said bolt having means capable upon actuation to engage in back ofthe keeper wall to prevent movement of said bolt out of said keeper opening, operating means for projecting said bolt into the keeper opening and for actuating said rst-mentioned means to engage in back of the keeper wall, said operating means including operating connections permitting movement of said bolt beyond its normal projected position as initially determined by said operating means, whereby a separting movement between said keeper wall and casing such as would result from an attempt to jimmy the lock construction is effective to bring about movement of the projected bolt beyond its normal projected position, and means responsive to the aforesaid movement of said boltbeyond said normal projected position for controlling said signaling means, whereby, upon such a separating movement between said keeper wall and casing taking place, the aforesaid movement of said bolt beyond said normal projected position aiects said controlling means and the latter effects actuation of said signaling means.

20. In lock construction, inv combination, a casing having slidably mounted therein a bolt for projection into the opening in a keeper wall, said bolt having means capable upon actuation to engage in back of the keeper wall to prevent movement of said bolt out of said keeper opening, operating means for projecting said bolt into the keeper opening and foractuatingv said first-mentioned means to engage in back of the keeper wall, said operating means including operating connections permitting movement of said bolt beyond its normal projected position asl

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