US2028672A

US2028672A - Combined lock and latch

Info

Publication number: US2028672A
Authority: US
Inventors: Kubina John
Original assignee: MATEUSZ BLACHA
Current assignee: MATEUSZ BLACHA
Priority date: 1934-07-11
Filing date: 1934-07-11
Publication date: 1936-01-21
Anticipated expiration: 1953-01-21

Description

W 23, 1936- J. KUBINA v COMBINED LOCK AND LATCH Filed July 11, 1934 3 Sheets-Sheet l Jan. 21, 1936. J, K N 2,028,672

COMBINED LOCK- AND LATCH Filed July 11, 1954- s Sheets-Sheet 2 49 7 I as v I John Kgbina.

Jan. 21, 193%.. J. KUBINA I 2,028,672

" COMBINED LOCK AND LATCH Filed July 11, 1934 5 Sheets-Sheet 3 John Jfiubima- Patented Jan. 21, 1936 UNITED STATES PATENT OFI COMBINED LOCK AND LATCH Application July 11, 1934, Serial No. 734,681

1 Claim.

This invention relates to certain new and useful improvements in combined locks and latches adapted to be employed upon closures for locking the same in closed position.

The primary object of this invention is to provide a fool-proof lock having a pair of key operated safety catches for holding the bolt of the lock in its locked position whereby picking of the look by an unauthorized person may be prevented.

A further object of this invention is to provide a lock of the above mentioned character having a sliding bolt and a knob operated latch and means operated by the latch knob for locking the bolt in a closed position.

A still further object of this invention is to provide a lock of the above mentioned character having a spring projected bolt capable of being retracted by means of a key which requires both turning and axial movement, for releasing the locking bolt whereby it may be retracted by the turning movement of the key.

A still further object of this invention is to provide a combined lock and latch including a key operated bolt and a latch and a knob operated bolt and means connected to the knob operated bolt when the same is in its extended position for looking or unlocking key operated means associated with the locking bolt.

Other objects and advantages of the invention will become apparent during the course of the following description, taken with the drawings and wherein,

Figure 1 is a top elevational view of the lock embodying this invention illustrating the cover plate removed for the purpose of more clearly disclosing the lock structure and as illustrated the locking bolt is in its retracted position and the latch bolt is in its normal position;

Figure 2 is a top elevational view of the lock similar to Figure 1 showing the latch bolt in its normal position and the locking bolt partially projected;

Figure Bis a top elevational view of the lock structure illustrating the latch bolt retracted and the locking bolt fully extended; Figure 4 is a top elevational View of the lock structure illustrating some of the elements partly in cross-section to more clearly show the details of construction;

Figure 5 is a horizontal cross-sectional view taken on lines 5-5 of Figure 1, looking in the direction of the arrows illustrating the locking bolt in its retracted position and showing one of the catches for retaining the bolt and further showing the openings in the bolt for being engaged by the bolt catch; 7

Figure 6 is a horizontal cross-sectional view taken on line 6-5 of Figure 1, looking in the direction of the arrows and illustrating the lock- 5 ing bolt in its retracted position and further showing the key engaging portions for being engaged by the wings of the operating key;

Figure 7 is a vertical cross-sectional view taken on line 'l-'l of Figure 1, looking in the direction of the arrows, illustrating the manner of holding one of the locking bolt catches out of its locked position, with an opening formed in the bolt;

Figure 8 is a similar view illustrating the looking bolt catch in its locked position and showing the wedge shaped member operated by the knob tumbler for retaining the bolt catch in its locked position; v

Figure 9 'is an exploded side elevational view of the locking bolt; 20

Figure 10 is a side elevational view of the operating key illustrating the wings thereon for engaging the locking bolt and the looking bolt tumbler; and

Figure 11 is a top plan view of the entire lock illustrating the cover thereon and showing the latch knob and key-hole opening for operating the latch bolt and locking bolt.

In the drawings, wherein for the purpose of illustrating the invention and wherein like reierence characters will be employed to designate like parts throughout the same, the reference character 5 will generally be employed to designate a lock casing having a cover 6 held in place by a screw I received in a threaded opening formed in a boss 8 carried by the bottom wall of the casing.

One end of the lock casing 5 is provided with rectangular openings 9, I0, and H through which projects a sliding latch bolt l2, a locking bolt I3, and a night latch bolt l4 respectively.

The latch bolt I2 is provided with an enlarged portion l5 having a slot l6 for receiving a portion of a projecting spring l8. One end of the spring I8 is anchored in a boss I9 as at 20 while the free end 2| is received in an opening 22 formed in one end of the locking bolt 13. The latch bolt 12 is guided by means of a guide loop 23 and said latch bolt I2 is provided with an extension 24 having 0 an upturned end 25 forming a pin adapted to be received in an opening 26 formed in the free end of an arcuately curved wing 21 integral with a circular boss 28 formed on a spindle 29 having a squared end 30 capable of receiving a correspondure 11.

Formed in the locking bolt l3 are aligned

slots

32 and 33 for receiving the

respective guide pins

34 and 35 suitably carried by the lock casing 5. An additional guide in the form of a loop 36 is provided for the locking bolt 13 and said guide 35 is secured or anchored to the casing 5. Formed integral with one end of the guide loop 36 is a boss 31 having a bore 38 through which extends a locking pin 39. One end of the lock-V ing pin 39 is bent angularly as at 49 and is received in a loop 4! formed integral with the circular boss 23 whereby turning movement of the spindle 29 will eifect the retracting of the bolt [2 as well as the vertical movement of the locking pin 39.

The loop spring 42 is mounted in one end of the casing 5 and has its ends anchored thereto by means of screws or bolts 43. Guide pins 44 are provided for the spring 42 and are also secured to the lock casing 5. The spring 42 is adapted to engage the locking bolt l3 and normally project the same through the opening l9 whereby said bolt will normally assume a locked position. In addition to the locking bolt projecting spring 42, there is provided a retracting spring 45 which is smaller than the spring 42 and of less tension strength. One end of the spring 45 is anchored to the lock casing as at 46 while the opposite end is free as at 41 to be received within a cut-out portion 48 formed in one of the longitudinal edges of the locking bolt l3. V

Bosses 49 are formed in the lock casing and have internal screw threads 50 for receiving screws 5! after the cover 52 has been placed in position to completely cover the projecting spring 42.

Formed in the lock casing 5 is a cut-out portion 53 having a reduced connecting portion 54. Mounted above the reduced

portions

53 and 54 is a spring member 55 anchored to the lock casing as at 56 so that the free end 51 may move freely within the reduced cut-out portion 54. Formed on the free end of the spring member 55 is a pin 58 and also formed on the enlarged portion of the spring member 55 adjacent the anchoring point is a key receiving pin 59. The free end of the spring member 51 is adapted to underlie the looking bolt l3 whereby the pin 58 may engage within an opening 69 formed in the underside of the locking bolt as clearly shown in Figures 1, 2, 3, '7 and 8, when said bolt is in its projected position.

Formed at one end of the locking bolt I3 is a pair of notches 6i and 62 forming a key engaging wing 83 as clearly shown in Figure 9. The notches BI and 62 are cut-away as at 64 and 65 respectively for engagement by a cut away portion 65 formed in the wing 61 of a key69. The projection 1| engages the reduced portions 64 and 55 of the notches El and 62 while the extension 68 is adapted to trip a bolt locking tumbler which will be hereinafter more fully described.

As clearly shown in Figures 1, 2, 3 and 4, also 7 and 8, the locking pin 39 associated with the spring arm 55 has its free end bevelled as at 1| that is adapted to be slid under the free end of the spring member 55 or may be moved over top of the spring member 55 to retain the pin 58 in or out of engagement with the opening 89 formed in the locking bolt l3. Obviously, an inward pressure upon the key 69 will force the spring member 55 into the seat 54 formed in the casing and will thereby move the pin 58 out of engage- 2,028,672 ingly shaped socket in the knob 3 I, shown in Figment with the opening 69 providing the latch operated rod 39 has not been moved to position the wedge shaped end 1| under the free end of the spring member 55. When the rod 39 has been manipulated so as to move the wedged portion H under the free end 51 of the spring member 55, it is impossible to retract the bolt l3 by operating the key until the shaft 29 has been rotated to withdraw the wedged end 1| from under the free end 51 of the spring member 55. Upon slight pressure exerted inwardly upon the key, the free end 51 will be flexed with the resultant displacement of the pin 58 from the opening 69.

In addition to the bolt locking pin 58 there is provided a key operated tumbler 12 pivoted to the lock casing by means of a machine screw 13. The pivoted end of the tumbler 12 is provided with an enlarged boss 14 to allow the tumbler 12 to extendbelow the guard 35 and above the sliding pin 39. Formed on the tumbler 12 is a cam portion 15 adapted to be engaged by a pivoted striker arm 19 also pivotally secured to the casing by means of a machine screw 11. The free swinging end of the striker arm 15 is arcuately curved and is presented to the cam face 15 formed on the tumbler 12 so that as the extension 68 of the key 69 engages the arcuately curved portion 16 the tumbler 12 will be raised vertically. Formed on the free end of the tumbler 12 is an extension 18 terminating in a hooked end 19 adapted to be selectively received in openings 80 and 8| formed in the locking bolt 13.

It-Will be obvious that when the key 69 is turned in the lock to withdraw the bolt l3 after the latch handle 3| has been turned to move the sliding bar 39 upwardly, the tumbler 12 will be simultaneously raised to disengage the notched end '19 from the opening 80. When the bolt 13 has been retracted the tumbler 12 is again dropped so thatthe hook end 19 engages in the opening 8| thereby holding the bolt in a retracted position.

A fiat leaf spring 83 has one of its ends as at 84 anchored in a portion of the guide loop 36 while its intermediate end is supported as at 85 in a struck-up portion formed on the side wall of the lock casing 5. The free end of the leaf spring 83 is presented to the hooked end of the tumbler 12 as at 86.

A night latch bolt i4 is guided in the opening II and is further guided by means of a strap 81 secured to the lock casing and it will be noted that one end of the night latch bolt 14 is notched as at 88 so that it may be dropped downwardly as shown in Figures 3 and 4 to retain the bolt in its projected position. A knob 89 is connected to the night latch bolt 14 by means of an extension 99 and is adapted to operate in a slot 9| formed in the lower edge of the lock casing 5.

When the lock parts are in their positions shown in Figure 1, the bolt l3 may be retracted and projected by means of the key without necessitating pushing upon the key to flex the spring arm 51 as it will be noted that the slide rod 39 is positioned above the arm 51 thereby normally holding the pin 58 out of engagement with the opening 69 in the locking bolt I 3. By merely inserting the key in the lock and turning the same, the tumbler 12 may be raised to allow the projection of the bolt under the tension of the spring 42. As shown in Figure 2, the bolt I3 is partially projected and by turning the key 59 three hundred and sixty degrees (360) the bolt may be projected to its fullest extent as shown in Figure 3.

After the bolt has been projected, the latch l2 may be retracted to raise the sliding pin 39 so that the pin 58 will spring into the opening 60 formed in the bolt and retain the same in its projected position. By releasing the latch knob 3|, the spring 58 will cause the projection of the latch bolt l2 thereby returning the sliding pin 39 under the spring arm 51 and prevent the retraction of the bolt !3 by manipulation of the key 69 unless the latch handle 3| is operated to withdraw the sliding pin 39 whereupon the wedge end II will be moved out of the path of the spring arm 51 and again allow the retraction of the bolt I3 by the rotation of the key 69 in addition to an inward pressure thereon-sufficient to flex the spring arm 55 and cause the release of the pin 58 from the opening 66.

In Figure 4 is shown quite clearly the manner in which the sliding pin 39 may be moved to cause the wedge-shaped end H to engage under the spring arm 5'! and force the pin 58 into the opening 60 when the bolt i3 is in its fully projected position.

A spring 32 has one of its ends as at 93 secured to the lock casing while the free end as at 94 is presented to the night latch bolt M to normally force the same downwardly and to urge the notch '88 into engagement with the bottom portion 01' the guide loop 81.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred embodiment of the same and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as claimed.

I claim:

A look structure comprising a casing, a key operated bolt slidably mounted in the casing and having an opening therein inwardly of its edges, a spring for normally holding the bolt projected, the casing having a recess formed in the interior wall thereof beneath the bolt, a spring arm mounted over the recess having one end presented to the sliding bolt, a key stud mounted on the spring arm laterally of the bolt and adapted to receive a key for the operation of the bolt, a pin mounted on the free end of the arm adapted to enter the opening in the bolt, and said key stud adapted to be depressed by the bolt operated key for moving the spring arm into the recess to permitretraction of the bolt from its locked position against the tension of the spring.

JOHN 'KUBINA.