US1954718A - Double lock - Google Patents

Description

April 10, 1934. c; ssNE ET AL I 1,954,718

DOUBLE LOCK Filed Sept. 19. 1932 s sheets-sheet 1 l "Muslim" fi/z'arlea 7ZZss/za; 2/0672 Ease/26v;

IN T 9 April 10, 1934. c. TILSSNER ET AL DOUBLE LOCK Filed Sept. 19, 1932 5 Sheets-Sheet 2 0 m a w. a m 7 a 8 6 W i 4r S v 1 J J3 12% w 1 3 0 g 3 fl ATTORNEY April 10, 1934. c ss r AL 1,954,718

DOUBLE LOCK Filed Sept. '19, 1932 s Sheets-Sheet 3 6 /54/ 595 9 ZZSSIZefl 7 lNvENToRS wlmsssd. i ATTORNEY Patented Apr. 10, 1934 UNITED STATES PATENT OFFICE Claims.

The invention relates to a lock mechanism and more especially to a double lock.

The primary object of the invention is the provision of a lock of this character, wherein plural bolts are employed and these are operated upon for double locking action so that the lock will be firm and secure and by reason of the assembly it is practically impossible to pick the same, thereby assuring security and safety in the use of such lock.

Another object of the invention is the provision of a lock of this character, wherein the key barrel is mounted in a novel manner so that the same cannot be extracted from the casing and the casing of the lock is also novel, while the mechanism within the casing is of the double bolt type and is operable for double looking action and the shackle of the look when open can be latched closed without manipulation of a key.

A further object of the invention is the provision of a lock of this character, wherein the construction of the same in its entirety is of novel form and is readily and easily operated for locking and unlocking purposes and when locked will be firm and secure and the chance of surreptitiously opening the lock is reduced to a minimum, it being required that the lock be broken or mutilated under surreptitious manipulation for the opening thereof.

A still further object of the invention is the provision of a look of this character which is comparatively simple in construction, thoroughly reliable and efficient in its purposes, strong, durable, compact, and inexpensive to manufacture.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described in detail, illustrated in the accompanying drawings, which disclose the preferred embodiment of the invention, and pointed out in the claims hereunto appended.

In the accompanying drawings:-

Figure 1 is an elevation of the lock constructed in accordance with the invention, the shackle being shown by full lines in locked position and by dotted lines in open position or unlocked.

Figure 2 is an edge elevation thereof.

Figure 3 is an enlarged side elevation showing the face or cover plate of the lock casing removed and the parts of the locking mechanism in looking relation.

Figure 4 is a view similar to Figure 3 showing the frame of the lock mechanism partly broken away.

Figure 5 is a sectional view on the line 5-5 of Figure 3 looking in the direction of the arrows.

Figure 6 is a fragmentary perspective view of a portion ofthe lock mechanism frame showing in detail adjuncts, particularly thekey bit slots.

Figure 7 is a perspective view of one of the dogs for the upper locking bolt.

Figure 8 is a perspective view of the upper looking bolt.

Fig. 9 is a perspective view of another of the dogs as carried by the upper locking bolt.

Figure 10 is a perspective view of the lower locking bolt, the same being partly broken away.

Figure 11 is a perspective view of the dog or tumbler for the lower locking bolt.

Figure 12 is a perspective view of the key bit.

Figure 13 is a sectional view on the line 13'-I3 of Figure 3 looking in the direction of the ar rows.

' Figure 14 is a view similar to Figure 13 showing the parts in shifted position.

Figure 15 is a fragmentary elevation partly in section showing by full lines the locking position of the upper tumbler for the upper bolt of the lock and by dotted lines its released position.

Figure 16 is a fragmentary sectional View show ing the upper bolt locked with the tumbler 41 in bolt releasing position.

Figure 17 is a fragmentary elevation of theupper locking bolt in retracted or released position.

Figure 18 is a sectional view on' the line 1'8' l'8 of Figure 16 looking in the direction of the arrows.

Figure 19 is a sectional View on the line 19-19 of Figure 18 looking in the direction of the arrows.

Figure 20 is a fragmentary sectional view on the line 20-20 of Figure 17 looking in the direction of the arrows.

Figure 21 is a sectional view on the line 2l-21 of Figure 16 looking in the direction of the arrows.

Figure 22 isa detail elevation of the lower look ing bolt tumbler, latching position being in full lines and unlatched position in dotted lines.

Figure 23 is a fragmentary vertical sectional view of the lower locking bolt showing the same in initial unlocking position.

Figure 24 is a view similar to Figure 23 showing the lower locking bolt in fully unlocked position,

Figure 25- is a view similar to Figure" 24 show-' ing the lower locking bolt being shifted to first looking position.

Figure 26 is a view similar to Figure 25 showing full locking position ofthe lower locking bolt.

Figure 2'? is a view similar to Figure 26 showing the lower lockingv bolt tumbler in releasingor unlatched position or about to latch the lower bolt in full locking position.

Figure 28 is a fragmentary transverse sectional view through the key barrel.

Figure 29 is a sectional view on the line 29--29 of Figure 28.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, A designates generally a lock, in this instance of the padlock type including a circular casing 10, the same being closed by a face plate 11 which is made fast through rivets 12 with the casing although said plate 11 can be otherwise secured for inclosing the lock mechanism hereinafter fully described.

Slidably fitted in the casing 10 through the perimeter thereof is a slidable and swinging shackle 13, its shank 14 being guided in an eye 15 extending from a lock mechanism frame 16 formed with apertures 17 for accommodating coupling lugs 18 on a cover plate 19, the latter being held in place through the medium of a fastener 20 in addition to the lugs 18. Slidably fitted upon guide ribs 21 on the frame 16 between it and the cover plate 19 are upper and lower locking bolts 22 and 23 respectively, these being adapted for removable engagement in keeper recesses 24 in the shank 14 of the shackle. The shank 14 carries a stop screw 25 which coacts with the eye 15 to limit the outward sliding movement of the shackle on the opening of the lock and avoids separation of the shackle from the casing 16.

The cover plate 19 has provided therein a plurality of key slots 26, 27 and 28 respectively, these merging into an opening 29 for a rotatable key barrel 30, the latter being formed with a key bit way 31 for registration with the said slots 26, 27 and 28 on the turning of the barrel 30 for this purpose. The barrel is formed with a disk-like head 32 which is counterseated at 33 in the face plate 11, the inner side of which is formed with a forked guide 34 underlying the head 32 to retain the head rotatably fitted with the face plate 11, the guide aligning with the slot 27 to have its furcation register with this slot and with the way 31 in the barrel 30 when the latter has been rotated for this purpose, and which position is the initial position for the introduction of the key 35 in the lock.

The upper bolt supports a dog 36 pivoted at 37 and tensioned by a spring 38. The dog 36 is on one side of the bolt 22 while at the other side is a tumbler 41 pivoted at 42 to the frame 16 within the casing 10 and tensioned by a spring 43. The lower bolt 23 has coacting therewith a tumbler 44 pivoted at 45 to the frame 16 in the casing 10 and tensioned by a spring 46, the tumbler being formed with a latching lug 47 which periodically engages at either side of the abutment or shoulder 48 formed on the lower edge of the bolt 23. The abutment or shoulder 49 on bolt 23 is to limit its throw to latching position, while this bolt 23 is maintained retracted or fully unlatched by contact with the shank 14 of the shackle 13 when the latter has been lifted by its spring after the said bolt has been shifted to the position shown in Figure 24 of the drawings. The bolt 22 has coacting therewith the tumbler 41 which carries a latching lug 50 engageable with abutments or shoulders 51 and 52 respectively formed in the upper edge of said bolt 22, while the dog 36 has at its upper edge a stop lip 53 which limits the swinging movement thereof in one direction as this lip is adapted to rest upon the upper edge of the bolt 22. The dog 36 carries a lug 54 which is engaged by a spring keeper 57 riveted or otherwise fastened to the cover plate 19 upon the outer face thereof, the spring being disposed in slightly overlapping relation to the slot 27 so that the bit of the key 35 when pulled outwardly of said slot 27 will distort the spring keeper 57 to release its engagement with the lug 54 on the dog 36 whereby the latter will become lowered in the operation of the lock mechanism. The bolt 22 in its lower edge is formed with an elongated clearance or recess 58 to accommodate the key bit 35, when the latter is inserted in the way 31 in the barrel 30, and permit the action of the bit upon the lowered dog 36 for retracting the bolt 22 on the release thereof by the tumbler 41. The lower bolt 23 in its upper edge is formed with the striking shoulders 59 and 60 for the key bit 35, the said bolt being beveled as at 61 to afford receding action of the bit 35 upon the top edge of the tumbler 44, as will be apparent in Figure 26 of the drawings.

The lower bolt 23 has connected thereto a coiled tensioning spring 62 which shifts said bolt to locking position, while the shank 14 of the shackle 13 at its inner free end is acted upon by a tensioning spring 63 so that when the shackle is free it will be sprung to open position shown by dotted lines in Figure 1 of the drawings, the closed or looking position of the shackle being shown by full lines in Figures 1, 2 and 3 of said drawings.

In the operation of the lock, assuming that the shackle is in closed or locked position, the bolts 22 and 23 will have been thrown to locking engagement in the keeper recesses in the shank 14 of the shackle and in this position of these bolts the tumblers and dogs 36, 41 and 44 will be allocated as shown in Figures 3 and 4 of the drawings. To unlock the lock the bit 35 of the key is inserted in the barrel 30, it being of course understood that the way 31 is aligned with the slot 26, whereupon the bit is turned counterclockwise a short distance until it reaches the slot 27, then an outward pull upon the bit 35 is eifected so that the keeper 57 will be disengaged from the lug 54 on the dog 36 permitting the latter under tension to drop whence the key bit 35 is pushed into the slot 27 and turned counterclockwise to raise the tumbler 41 and then turned clockwise to act upon the lowered dog 36 to retract the bolt 22, thus unlatching the same from the shank 14, as will be understood on reference to Figure 16. Thereafter, the key bit will be removed from the slot 26 and engaged in the slot 28 whence by counter clockwise movement of the bit it will be caused to engage the tumbler 44 and thus initially release the lower bolt 23 whereupon the latter will be moved to partial unlatching position and the tumbler 44, under the tension of the spring JL 46, will snap into engagement with the partially unlatched bolt and the key bit will have to again be turned to release the tumbler 44 the second time. On the initial movement of the bolt 23 the bit will engage the striking shoulder 60 (Figure 27) and on the second or repeated turning of the bit it will engage the striking shoulder 59 and thus shift the lower bolt 23 to full releasing position, whereupon the shank 14 of the shackle 13 will be freed and the spring 63 acting thereon will slide it to open or unlatched position. When the lower bolt 23 is in fully locked position the lug 47 on the tumbler 44 engages behind the lug 48 and holds the bolt projected, as is shown in Figure 26 of the drawings. The first movement of the key releases the tumbler 44 and partially retracts this bolt 23, whereupon the tumbler springs into position to interpose the lug 47 forwardly of the lug 48 and thereby prevents complete projection of the bolt until the key is again manipulated.

Reverse movements, of course, occur in projecting the bolt to locking position under the influence of its spring 62.

To initially latch the shackle 13 the same is pushed inwardly of the casing 10 and the lower bolt 23 under the action of the spring 62 will be thrown to partial latching position as the said bolt 23 will be in alignment with its keeper recess 24. The key bit 35 is inserted in the barrel and turned to lift the dog 36 for its engagement with the keeper 57 and also to free the tumbler 41 from the bolt 22 whence the latter will be thrown to latching position. The lower bolt 23 has a double latching action under the cooperation of the tumbler 44 therewith.

The cover plate 19 on opposite sides of the slot 28 and also on one side of the slot 26 is provided with commutation protuberances 64 and 65 respectively, their position being susceptible of change, which coact with the bit 35 of. the key according to the clearances 66 and 67 therein so that if these clearances do not match with the protuberances the key cannot be turned within the barrel 30 for the operation of the locking mechanism as should be obvious.

It will be apparent that the upper and lower bolts 22 and 23 have step by step movements to locking and unlocking positions and the two bolts effect a double lock.

What is claimed is:-

1. In a lock of the character described, a casing, a locking element slidably fitted in the easing and having a plurality of keeper recesses, a plurality of locking bolts slidably fitted in the casing and engageable with the respective keeper recesses, spring tensioned tumblers pivoted in the casing at the sides of the respective bolts, means on the tumblers to hold the respective belts in projected or retracted position, a key-engageable dog pivoted on one bolt for retracting the bolt when key-engaged, means for tensioning the bolts, and key-releasable means for locking the dog in a releasing position.

2. In a lock of the character described, a casing, a locking element slidably fitted in the casing and having a plurality of keeper recesses, a plurality of locking bolts slidably fitted in the casing and engageable with the respective keeper recesses, tumblers pivoted in the casing at the sides of the respective bolts, means on the tumblers to hold the respective bolts in projected or retracted position, a key-engageable dog pivoted on one bolt for retracting the bolt when key-engaged, means for tensioning the bolts, key-releasable means for locking the dog in a releasing position, means in the casing on the locking element to limit the sliding movement of the latter in one direction, means in the casing for tensioning the said element to effect unlocking move ment thereof when released by the locking bolts, and a frame for the locking bolts within the easing and having a cover plate provided with a plurality of key-guiding slots for allocating the bit of the key relative to the locking dog.

3. In a lock of the character described, a casing; a locking element slidably fitted in the casing and having a plurality of keeper recesses, a key barrel rotatably fitted in the casing between the bolts and having a key-way, a plurality of looking bolts slidably fitted in the casing and engageable with the respective keeper recesses, tumblers pivoted in the casing at the sides of the respective bolts, means on the tumblers to hold the respective bolts in projected or retracted position, a key-engageable dog pivoted on one bolt for retracting the bolt when key-engaged, means for tensioning the bolts, key-releasable means for locking the dog in a releasing position, means in the casing on the locking element to limit the sliding movement of the latter in one direction, means in the casing for tensioning the said element to effect movement thereof when released by the locking bolts, a frame for the locking bolts within the casing and having a cover plate provided with a plurality of key-guiding slots for allocating the bit of the key relative to the locking dog, the key barrel having a disk-like head interfitted with the casing, and a forked guide on the casing retaining the head interfitted with the casing and also aligned with one of the slots in the cover plate.

4. In a lock of the character described, a casing, a locking element slidably fitted in the casing and having a plurality of keeper recesses, a key barrel rotatably fitted in the casing between the bolts and having a key-way, a plurality of locking bolts slidably fitted in the casing and engageable with the respective keeper recesses, tumblers pivoted in the casing at the sides of the respective bolts, means on the tumblers to hold the respective bolts in projected or retracted po-- sition, a key-engageable dog pivoted on one bolt for retracting the bolt when key-engaged, means for tensioning the bolts, key-releasable means for locking the dog in a releasing position, a frame for the locking bolts within the casing and hav-- ing a cover plate provided with a plurality of key-guiding slots in radial relation to the key barrel for allocating the bit of the key relative to the locking dog, the key barrel having a disk-- like head interfitted with the casing, and a forked guide on the casing retaining the head interfitted with the casing and also aligned with one of the slots in the cover plate.

5. In a lock of the character described, a casing a locking element slidably fitted in the casing and having a plurality of keeper recesses, a key barrel rotatably fitted in the casing between the bolts and having a key-way, a plurality of locking bolts slidably fitted in the casing and engageable with the respective keeper recesses, tumblers pivoted in the casing at the sides of the respective bolts, means on the tumblers to hold the respective belts in projected or retracted position, a key-engageable dog pivoted on one bolt for retracting the bolt when key-engaged, means for tensioning the bolts, key-releasable means for locking the dog in a releasing position, a frame for the locking bolts within the casing and having a cover plate provided with a plurality of keyguiding slots for allocating the bit of the key relative to the locking dog, a removable plate on the casing, the key barrel having a disk-like head interfitted with the casing flush with the removable plate, a forked guide on the casing retain ing the head interfitted with the casing and also aligned with one of the slots in the cover plate, and latching lugs formed on said dogs and engageable with the =locking bolts with which the same are associated.

CHARLES TILSSNER. JOHN TAUSCI-IER.

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