US 2162984 A
Description (OCR text may contain errors)
June 20, 1939. J. F. THOMAS LOCK Filed Oct. 18, 1938 2 Sheets-Sheet 1 A tiorneys Julie 1939- J. F. THOMAS LOCK Filed Oct. 18, 1938 2 Sheets-Sheet 2 Inventor JOSEPH 1." 72/0/14/25,
Attorneys Patented June 20, 1939 UNITED STATES harem OFFIQE 5 Claims.
My invention relates to improvements in sealed locks of the padlock, or shackle, type.
The invention is designed with the particular purpose in view of equipping a padlock with a detachable tell-tale seal preventing unlocking of the lock and providing visible and positive proof that the lock has been tampered with.
Another object is to provide a lock of the character above identified with a seal functioning in the manner above set forth and interlocked with the shackie of the lock thereby obviating the necessity for separate attaching means for the seal.
Another object is to equip a padlock with an identification seal held in place by the lock shackle and in a position such that the data thereon may be easily read when the lock is attached in pendent position.
Still another object is to provide a lock equipped. as above specified and adapted for use in the usual manner as a padlock, or, to be fixed to a safety deposit box, or the like, so as to block access to the keyhole of said box until unlocked.
To the accomplishment of the above, and subrdinate objects presently appearing, my invention has been illustrated in the accompanying drawings, set forth in detail in the succeeding description, and defined in the claims appended hereto.
In said drawings:
Figure 1 is a view in front elevation of a preferred embodiment of my padlock, with the parts shown in locking position.
Figure 2 is a similar view with the parts shown in unlocking position.
Figure 3 is a view in front elevation with the front plate removed and showing the parts in looking position and drawn to anenlarged scale.
Figure 4 is a view in front elevation of a modified embodiment of the invention with the parts shown in looking position.
Figure 5 is a view in vertical section taken on the line 55 of Figure 4 looking in the direction indicated by the arrows.
Figure 6 is a view of the modified embodiment of the invention with the front section removed and showing the parts in looking position in full lines and the shackle in unlocking position in dotted lines.
Figure 7 is a view in transverse section taken on line 'l-'l of Figure 4, looking in the direction indicated by the arrows.
Figure 8 is a view in front elevation of another modified embodiment of the invention.
Figure 9 .is a similar view with the seal removed.
Figure 10 is a view in edge elevation of said other modified embodiment of the invention.
Figure 11 is a view in section taken on the line i-l i of Figure 10 looking in the direction indicated by the arrows.
Figure 12 is a view in rear elevation of the front section of said other modified embodiment of the invention, and
Figure 13 is a fragmentary view in transverse section taken on the line l3|3 of Figure 9.
Referring to the drawings by numerals and first to the preferred embodiment of the invention shown in Figures 1 to 3, in this embodiment of the invention the lock comprises .a flat body a portion l of any suitable metal and including a back section 2 and a front plate 3 suitably secured to section 2, as at 3. 'The backsection 2 is grooved along the side edges thereof, as at t and 5, to receive a staple-likeshackle 6 hav-' ing a long leg. longitudinally slidable and rotatable in groove 4 and a short leg 8 slidable into and out of the top of groove 5. Also endwise slidable in the groove 5 below the short leg 8 and for a purpose presently seen is a keeper bolt 9.
Sliding movement of the legs I and 8 inwardly of the body I is limited by engagement of the extremity of the long leg I with the bottom of the groove 4, engagementof the short leg 8 withthe upper end of the bolt 9, and engagement of the lower end of bolt 9 with the bottom of groove 5. The back section 2 and plate 3 are apertured adjacent to the bottom edges thereof to provide a transversely extending through slot iii in said body bisecting the grooves 4 and 5 adjacent to the bottom of the latter. The top and bottom walls of the slot l0 incline downwardly and forwardly. The purpose of the slot it will presently appeaiz Outward sliding movement of the shackle t is limited by a collar II on the short leg l engaging the upper end of an enlarged portion l2 of groove 4, the degree of such movement being just sufficient for the short leg 8 to be withdrawn from groove 5 and the shackle swung by rotating the leg 1 in groove 4. Outward sliding movement of bolt 9 is limited by a collar l3 and an enlargement M of groove 5 in the same manner as described with reference to the shackle 6. In the limits of outward movement of shackle 6 and bolt 9 the extremity of leg and the lower end of bolt 9 are substantially flush with the upper wall of slot id. The lower portion offthe back section 2 is chambered, as at 15, the chamber opening into the bottom of groove '4. A locking dog ,lfi for the shackle 6 is pivoted, as at -l l, in said chamber for movement in opposite directions into and from engagement with a locking notch H3 in the long leg 1, engagement of the dog I6 with notch I 8 being permitted in the limit of inward movement of said shackle. A suitably arranged leaf spring I 9 in the chamber l yieldingly urges the dog I6 in the proper direction to engage the same'with said notch l8. The locking dog I6 is movable in the opposite direction by means of a dog operating plunger 20 mounted in the vertical center of the section 2 to extend through the chamber I5 and out of the bottom of said body, said plunger being endwise slidable inwardly and outwardly to project its upper end into and retract the same from the slot I0. Under inward movement" of said plunger 20 a lateral lug 22 thereon is en: gaged with a lug 23 on said dog l6 and the latter thereby moved in said opposite direction to disengage the same from the notch I8. A collar 24 on said plunger 20 engaging the bottom wall of the chamber [5 establishes the outward limit of movement of said plunger in which position the upper end of the plunger is withdrawn from slot l0. A socket 25 is provided in the section 2 into which the plunger 20 may be projected to limit inward movement thereof.
The described lock is sealed by means of an elongated tag-like seal 26 of any suitable material, preferably metal, proportioned to, fit into the slot IE! and having formed therein a pair of transversely extending slots 2'! adjacent opposite ends thereof, respectively, for the projection of the leg I and bolt 9 therethrough, whereby said seal in the limit of inward movement of the shackle 6 is secured to the body 5 in a position suchthat inward movement of the plunger 2!), and hence disengaging or unlocking operation of the dog I6, is blocked. The seal 26 may have delineated thereon any desired indicia such as an owners name and serial number, as shown in Figure 4.
The operation of the described embodiment of the invention will be readily understood. Suffice it to explain that the seal 26 is interposed in the 1 slot ill in the outward limits of movement of the shackle 6 and bolt 9, the shackle then slid inwardly to thrust the long leg 1 through one slot 21 and the bolt 9 through the other, and said shackle and bolt slid inwardly to the limit of inward movement thereof, whereupon the locking dog IE will move under the urge of spring l9 into the locking notch l8, with a snap action and thus lock the shackle 6 against withdrawal and the seal 26 in place. To eifect unlocking, the plunger 26 must be forward inwardly to perforate the seal 25. The rest of the interlocking operation has already been described.
In the modified embodiment shown in Figures 4, 5, 6 and '7 the body 29 of the lock comprises a rear section 36 and a front section 3| secured together, as at 32, and constructed to provide a transversely extending slot 33 adjacent the bottom of the body, similar to slot [0, a straight sided shackle guideway 34 in said body extending from the slot 33 to the top of said body, and a pair of side grooves 35 in said body below the slot 33 forming continuationsof the sides of the guideway 34 and closed at the bottoms thereof. The shackle, in this instance, is slidable inwardly and outwardly and comprises a pair of terminal legs 36 fitting into said grooves 35 to establish the inward limit of movement of the shackle and extending through the slot'33 in said limit of movement, an'intermediate web3'l slidably fitting in the guideway 34, and a hooked upper end 38, the terminal of which is interposed in the guideway 34 in said inward limit of movement of the shackle. A spring pressed locking dog 33 coacting with a locking notch 40 in one leg 36, together with a dog operating plunger 4| and seal 42 are provided in this embodiment of the invention all as described with reference to the preferred embodiment with the exception that both legs 36 of the shackle, in this instance, pass through the slots 43 of said seal and secure the latter in place. The sections 30 and 3| are apertured, as at 44, for the passage of a key through the body 29, said apertures being located in the vertical center of said body and so that in the inward limit of movement of the shackle, the web 31 blocks communication between said apertures and thereby prevents the insertion of a key therethrough. Bolt or screw holes 45 are provided in the side edges of the body 29 so that said body may be secured to a deposit box, or a drawer, not shown, with the apertures 44 in registration with the keyhole, indicated in dotted line at 46 in Figure 4, of said box, or drawer, whereby in the limit of inward movement of the shackle access to the keyhole is blocked and may not be had until the shackle is unlocked and shifted into a position such that an aperture 31 therein registers with apertures 44. As will be apparent the above described lock may be used as an ordinary padlock as-well as in the capacity above described.
In the embodiment shown in Figures 8 to 13,
the body 4'! of the lock comprises a pair of front central piercing prong 54 slidable into and out of a radial bore 55' in said section 48 to attach the lock to a bag or the like. The sections 48 and 49 are each provided with a pair of parallel elongated slots 56 and 51 on opposite sides of the axis of the section, respectively, so arranged that under relative rotation of said sections the slots of one pair may be moved into and out of registration with those of the other pair. The slots 56 of section 48 extend at right angles to the bores 5i and bisect the said bores. A latching bolt 58 is slidably mounted in a recess 59 in the rear section 48 for movement in opposite directions into and from engagement with a locking notch 63 provided in one leg 53. A suitably arranged coil spring 58 urges the bolt 58 in an engaging direction. The piercing pin 54 is adapted to en gage the bottom of the bore 55 and establish the limit of inward movement of the shackle 52 in which limit said notch registers with said bolt 58. The rear section 48 is provided with a circular recess 6| concentric to the axial stud 49' and opening into the recess 59. A bolt operating segment 62 is slidably fitted in said recess SI for endwise sliding movement therein into engagement with a collar 63 on said bolt 58 to thereby operate the latter into disengaging position in opposition to the spring 58. A stud 64 is provided on the section 49 to extend into the recess 6| and move the segment 62, the arrangement being such that under rotation of section 49 in one direction from a position in which the slots. 56 and 51 register, said stud 64 will engage and move said segment 62 and thereby cause the latter to operate the latch bolt 58 to disengaging position. On the other hand, under rotation of said section 49 in the opposite direction until said slots 56 and 51 again register, said spring 58 will project said bolt 58 into a position such that when the shackle is slid into the bores to the limit of its inward movement, the bolt 58 will engage notch 60 with a snap action.
In the embodiment described in the immediately preceding paragraph, a flexible, or semifiexible, rectangular shield 65 is utilized of a length such that the ends thereof may be interposed in the registering slots 56, 51 and a pair of slots 66 are provided in each of said ends for projection of the legs 53 through said ends. As will be obvious, under rotation of the section 49 in either direction out of a position in which slots 55 and 51 register, the slots 51 will be moved into angular relation to slots 56, as shown for instance by dotted lines in Figure 8, and thereby cause the ends of said shield 65 to be sheared off, the edges of said slots 5! functioning as shearing means. Thus the unauthorized operation of the lock will be clearly indicated.
The foregoing will, it is believed, suffice to impart a clear understanding of my invention without further explanation.
Manifestly, other modifications of the invention than those disclosed may be resorted to without departing from the inventive concept and right is herein reserved to such other modifications as fall within the scope of the subjoined claims.
What I claimis:
1. A look of the class described comprising a body provided with a transverse slot therein, a shackle mounted in said body for endwise sliding movement inwardly and outwardly thereof, and through said slot, means to lock said shackle to said body against outward movement rendered effective under inward movement of the shackle and operative to unlock the same, an unlocking member movable to operate said locking means, and a sealing member disposed in said slot and penetrated by the shackle whereby said sealing member is secured in said slot by said shackle to block such movement of said unlocking memher.
2. A look of the class described comprising a body provided with a transverse slot therein, a shackle mounted in said body for endwise sliding movement inwardly and outwardly thereof, and through said slot, means to lock said shackle to said body against outward movement rendered effective under inward movement of the shackle, and operative to unlock the same, an unlocking member movable to operate said locking means, and a sealing member of frangible material disposed in said slot and obstructing such movement of said unlocking member, said shackle penetrating said sealing member and thereby securing the same in said slot, said unlocking member comprising a plunger manipulative to project the same into said slot and through said member as an incident to operation of said looking means by said member.
3. A look of the class described for attachment to a drawer or the like over a keyhole in said drawer comprising a body having a through aperture therein for registration with said keyhole in the attached position of the look, a slide having an aperture therein and mounted in said body for endwise movement inwardly and outwardly of said body to shift said aperture into and out of registration with respect to said keyhole, means to lock said slide to said body against outward movement rendered effective under inward movement of said slide and operative to unlocking position, an unlocking member to operate said locking means, and a sealing member secured to said body by said slide and blocking such movement of said unlocking member.
4. A lock of the class described including a body comprising a pair of disk-like front and rear sections each provided with a pair of slots therein pivotelly secured together for relative rotation to revolve said pairs of slots into and out of registration one pair with the other, a shackle endwise slidable in one section inwardly and outwardly thereof and through the pair of slots thereof, means to lock said shackle to said section rendered effective under inward movement of the shackle and operative to unlocking position under relative rotation of said sections incident to revolving said slots out of registration, and. means to block relative rotation of said sections comprising a strip-like seal having the opposite ends thereof secured in registering slots of said pairs, respectively, by said shackle.
5. A look of the class described comprising a pair of disc-like body sections secured together in axial relation for relative rotation in sliding engagement, one of said sections being provided with a pair of through parallel bores therein upon opposite sides of the axis thereof, respectively, each of said sections having a pair of parallel through slots therein upon opposite sides of the axis thereof, respectively, the slots of one pair being movable into and out of registration with those of the other under relative rotation of the sections, a shackle slidable into and out of said bores and through the slots of the bored section, means to lock said sections against relative rotation when the slots of one pair are in registration with those of the other and operative to unlock said sections under relative rotation of the latter, said means locking said shackle against movement out of said bores, and a flexible strip-like seal having the opposite ends thereof extending into said slots and apertured for the extension of the shackle therethrough whereby under relative rotation of the sections to unlock said means the ends of said seal will be torn by movement of said slots out of registration.
JOSEPH F. THOMAS.