US2019655A - Automobile lock and locking mechanism - Google Patents

Description

Nov. 5, 1935. 5 CENTOFANTl 2,019,655

AUTOMOBILE LOCK AND LOCKING MECHANISM Filed Sept. 25, 1 930 ML ZALEZ zlffigz i 325 M 7 P ifm 1W4 1m, 5, 3mm 31w. I

Patented Nov. 5, 1935 UNITED STATES PATENT OFFICE AUTOMOBILE LOCK AND LOCKING MECHANISM 8 Claims.

My invention relates to improvements in looks and locking mechanism, involving new and useful improvements in look structure and construction, and has as an object the provision of an improved lock structure in the class of brass tumbler locks whereby all of said tumbler key slots remain parallel while in locked position, to camouflage measuring of said tumblers and is of a new and revolutionary design and construction and distinguishable as to species.

Still a further object of my invention comprises a cylinder carrying tumblers and reduced in diameter along a certain portion of its length to retain on said reduced part a housing spring tensioned and split within the diameter of the outer part-of the cylinder so as to support tumblers having difierent depths of locking tongues whereby said tumblers in locking position will all remain in parallel and be capable of locking in opposed directions to prevent measuring of the tumblers by unauthorized persons.

And a still further object forming the heart of my invention comprises a'construction of brass tumblers to provide easy insertion of a key to prevent measuring and to withstand hard usage and picking by locksmiths or unauthorized persons, said brass tumblers having a resting member, and a tongue Provided on the resting member and reduced to its end, said reduction engaging the extended key slot, such tumbler having a key slot which slots all remain alined while the tumblers are in looking position. 1

From the resting member downwards the tumbler tongues are of different lengths without touching the bottom of the extended locking slot in the look so as to form different tumbler combinations for the protection of said lock. v

With the above and other object in view the invention consists of the following novel features and detailof construction to be hereinafter more fully described and illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings forming part of this specification,

Fig. 1 is a view, part in elevation and part in section of the lock fully assembled,

Fig. 2 is across sectional view only, showing the position of the locking tumblers that allows alinemcnt of the key slots while in locked position in a plain cylinder,

Figs. 3, 4, 5, 6, 7 are front elevations of the locking tumblers showing and clearly disclosing the structure allowing alinement of the key slots while in locked position,

Fig. 8 is a cross sectional view on line 8-8 of Fig. 1,

Fig. 9 is a. view in elevation of a modified form of tumbler,

Fig. 10 isa cross sectional view on line Ill-I0 6 of Fig. 2, utilizing the modified tumbler of Fig. 9,

Fig. 11 is a view in elevation of the key cylinder with the portion reduced to accommodate the split spring housing,

Fig. 12 is a view in elevation of the housing 10 spring tensional and split,

Fig. 13 is a cross sectional view on line l3-l3 of Fig. 12.

In reference to the drawings in detail wherein numerals that are alike designate like parts 15 throughout the several views, I represents the lock cylinder bushing or face plate the body 3 of which is centrally bored for the receptionof a rotary cylinder 34 and is provided with longitudinally extending slots 22. The cylinder 34 is 20 reduced for a certain portion of its length as indicated by the numeral 20 in Fig.11. A split spring housing 35 having tumbler slots 40 is sleeved on saidreduced portion. I

The key operated cylinder 34 is rotatably se- 25 cured in the lock bore and has brass spring pressed key operated tumblers having tongues-46 for locking said cylinder from rotation in said lock.

The cylinder 34 and the spring housing 35 split 30 at 36 are provided with slots 40 registering with slots 22 in the bore of the, lock, the tumbler tongues of the cylinder extending normally through slots 40 in the housing 35 and into one of the longitudinal-locking slots 22. I 35 The lock cylinder 34 is provided with a plurality of spring pressed tumblers having locking tongues 46 which are normally spring urged into longitudinal slots 22 in the walls of the lock bushing bore to restrain the cylinder against rotation. 40

A properly bitted key 2 when inserted into the key slot in the cylinder will retract said tumbler ends from the locking slot 22 to allow rotation of said cylinder relative to the lock body 3.

On removal of the key the tumblers having 46 tongues 46 as they are shown in Figs. 3, .4, 5, 6, "7, of the drawings, are again projected by their springs into one of the longitudinal slots 22 in the lock body 3 to lock cylinder 34 from rotation therein.

. 50 It is clearly shown in the drawings that these tumbler tongues 46 are of difierent lengths from The tumblers when in the cylinder locking position, extend with their tongues into a slot 22 and by means of resting member 4l resting on the inner circular wall of housing 35. When the tumblers rest thus in looking position the key slots through the tumblers are all in alinement with each other due to the same position of the key slot in the tumblers relatively to the resting member 41, to prevent measuring by locksmiths or unauthorized persons.

In reference to Fig. 2 there is here disclosed only a plain cylinder 34 without the housing 35, the cylinder 34 having spring pressed tumblers as shown in Figs. 3, 4, 5, 6, 7, which are urged into the longitudinal slot 22 in the wall of the lock bore. As clearly shown in Figs. 3 to '7-each tumbler has a resting member 41 and a tongue 46 on the resting member to lock the cylinder from rtation by taking into one of the locking grooves 22 by spring pressure. 3

The tumblers each have a key slot 42 and at the upper end a shoulder or protective member 24 and a tongue l4. The tumbler tongues I4 vary in length similarly to tongues 46 so as to prevent measuring by lifting said tongues into a slot 22. To prevent picking, the tumblers at their locking ends are notched to reduce their width, as shown by the numeral 45.

The tongues l4 and shoulders or protective members 24 act similarly to the resting members 41 and tongues 46 to prevent measuring by lifting the tumblers into an opposed slot 22 when the barrel 34 is in locked condition.

Fig. 9 illustrates a modification of the tumblers shown in Figs. 3 to 7. In this modification the tumbler spring is carried entirely in the body of the tumbler by means of a struck out tongue 43 upon which the coil spring 44 is threaded. On insertion of this tumbler into its slot in the barrel 34 the spring 44 is put under compression by the end wall of the usual spring chamber provided in the tumbler slots in barrel 34.

The modified form of tumbler when inserted into one of the cylinder pockets adapted to accommodate these tumblers, without spring 44 will slide freely through said pocket unopposed, however, when the spring 44 is mounted on the tumbler tongue 43 the tumbler can not slide out but is forced back by the spring 43 for the purpose set forth.

The cylinder construction is shown in Figs. 11, 12, 13, cylinder 34 having a portion of its length indicated at 20 for the reception of a spring housing 35 split at 36 so as to snugly flt the circumference of reduced part 20, and thereby maintains the tumblers fully assembled and from displacements within the cylinder 34.

What I claim as new and desire to secure by Letters Patent is:

l. A lock mechanism comprising a casing having a bore that is provided with longitudinally extending slots, a cylinder rotatably mounted within said casing, spring urged tumblers within said cylinder each tumbler having a key slot, a resting member on each tumbler, a tongue on the resting member, the length of said tongues varying so as to form a combination and all of the key slots in the tumblers remaining in registration notched to reduce their width and said reductions engageable in the extended slot to prevent picking of said lock.

3. In a locking mechanism, a casing having a bore provided with a longitudinally extending slot, a cylinder movable in the bore, tumblers having key slots in the cylinder and adapted to lock the cylinder from movement, the cylinder being uniformly reduced in diameter for a certain portion of its length, and a member engaging said reduced portion to hold said tumblers in place, so that all of said tumbler key slots will be alined with each other when the tumblers are in locking position.

4. In a lock as set forth in claim 3, said member comprising a split spring housing embracing said reduction, tumbler slots in said housing, and means for permitting insertion of tumblers in the housing and cylinder.

5. A locking mechanism comprising a casing having a bore provided with longitudinally extending slots, a cylinder movable in said bore, spring urged locking tumblers in said cylinder and having key slots, resting members on said tumblers, a locking tongue on each tumbler extending from the resting member to the tumbler end,'said tongues being of difierent lengths, the resting members resting on the upper walls of the longitudinal slot when the tumblers are in locking position so as to aline said key slots in registration with each other.

6. A locking mechanism comprising a casing having a bore provided with longitudinally extending slots, a cylinder movable in said bore, spring urged plate tumblers in said cylinder each having a key slot, said tumblers being slitted to form tongues and a spring mounted on each tongue and held assembled thereby.

'7. A locking mechanism comprising a casing having a here that is provided with opposed longitudinally extending slots, 2. cylinder rotat- 45 ably mounted within said casing, spring urged tumblers within said cylinder, each tumbler having a key slot, and a tongue at each end, the length of these tongues varying so as to form a combination, and the key slots in the tumblers remaining in registration in locked position of the tumblers when one set of tongues extend into one of the longitudinal slots, the opposed set of tongues functioning to lock the cylinder when the tumblers are moved to extend into the opposed longitudinal slot.

8. A locking mechanism comprising a casing having a bore. that is provided with opposed longitudinally extending slots. A-cylinder rotatably mounted within said casing, spring urged tumblers within said cylinder, each tumbler having a key slot, and a tongue and resting member at each end of each tumbler; the length of these tongues varying so as to form a combination, and the key slots in the tumblers remaining in registered alinement in looking position of said tumblers to prevent the measuring of the locking tongue in a picking operation.

S! 'NATORE L. CENTOFAN'I'I.

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