US907234A

US907234A - Safety-lock.

Info

Publication number: US907234A
Authority: US
Inventors: Josef Herr
Original assignee: Individual
Current assignee: Individual
Priority date: 1908-06-06
Filing date: 1908-06-06
Publication date: 1908-12-22
Anticipated expiration: 1925-12-22

Description

J. HERR. SAFETY 1.00K. ArPLIoATIOxrIALnD n nu: e, `1 9oe.

` 907,234. Patented Dec. 22, 1908.

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`have invented .new and useful' Improvements 1n ASafetyLocks,

. of which aie followings- 'a speciiication. f

secured to the` inner side of .a 'dooryan'd adapted to beloperated by a keytwhichv` is ,introducedsinto the usual keyhole of thel main lock of such door. i

:In .the accompanying drawings: Figure' 1 is alplan, vpart y in section,^of `afjgdoor pro-` vided with myimproved safety lock; Fig. 2 a front lelevation, partly broken, away, of F1g. l; Fig. 3a. front view, partly insection, of the safety lock, with the cover rembved; Fiv. 4 a similar View showingthe parts in a diierent position; Fig. 5 a plan view of Fig.

y3, showing the cover in section; F 6 an enlarged cross section on line 66, i

g- 4;V Fig. 7 a similar section, showing the parts in a different position; and Fig. 8 a perspective View of the key. I

` The door 10 is provided with the usual lock 11 the bolt 12 of which is adapted to be projected into a corresponding recess 13 of door frame 14. 'Hit-he inner side of door 10 is *securedby screws 15 the base plate 16 of my improved safety lock. Base plate 16 is prov1 ed with a number of perforated posts 17, 1

18 and' 19 for the support of an axially movable locking bolt 20. The latter is normally pressed outwards by a coiled spring 21, in? terposed between Ipost 18 and arcollar 22 of bolt 20. The rear or inner section of the bolt is toothed as at 23 for the engagement ywith a toothed wheel or pinion 24, having a mutilated section 25, and keyed to a spindle 26. The latter passes through corresponding perforations of plate 16 andof a frame 27, which may be made integral with post 19. Near its one end, spindle 26 is provided with a collar 28, grooved as at 29, the spindle projecting slightly beyond such collar. At its other end, spindle 26 is threaded as at 30 for the engagement-with a knob or handle 31.

In order to retain bolt 20 in its retracted position, if so desired, bolt 20 is provided `with a'pin or stud 32 having a beveled top (Fig. 5), and adapted to be engaged by a resilient arm 33 secured to a post 34 of base plate 16.` A The co-relation of the Yarts is such that, when spindle'26 is rotate 'in the .the

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direetionfof ai@ maw; (rig. a); either by knob 31 or-by a suitabl'e'key,l hereafter more fully described, pinion will engage 'rack Q3,to retiractholt 2O,A until stud 32 has passed underneath arm 33, whereupon the mutilated.,

section'of pinion 24 arrives'opposite rack,.23l

(Fig). :During the retraction *of bolt '20, 'withthe free end of arm 33, so that the-lat 'ter will be gradually raised, while stud32f eveled stud 32'comes into engagement passes with itsy inclinedrto'p underneath fthe',

the lteeth fof pinion 24 have cleared rc'k 23.

arm. After the stud has cleared the Vvarm,A thelatter will, owing toit'sK resiliency, dre-"I 'scend infront ofstud 32, to'prevent spring '21 `from projecting bolt' 2O outwards, after For'releasing bolt 20pifnion -24 is' provided ,i

at its mutilated u .35, adaptedv .to 4engage the free 'end of arm 33. It will be readily understood that, when pinion 24 is turned in the direction of the arro'w, (Fig. 4,) shoulder 35 will lift arm 33, until it clears stud 32, (Fig. 7,) so that spring 2l is free to project bolt 2O outwards (Figs. 3 and 5).

The operating parts of the safety lock are inclosed 'within a. suitable casing 36, riveted to plate 16, for which purpose casing 36 is provided with a'number of prongs 37, erligaging corresponding openings 38 of p ate 1 y 4 j y In applying the safety lock described to door 10, base platel16 is so secured to the inner side thereof, that the `free end of spindle 26, as well as collar 28 are received within the key hole 39 of lock 11 `(Figs. 1 and 2). For operating the safety lock from the outside, a key 40 is used, which terminatesin a sharpened fork 41, adapted to enter grooves 29 of collar 28, while' the recess 42 of the key accommodates the protruding end of. spindle 26.

If the occupant of an apartment, proafter the key has grasped grooved collar 28, it is turned to the left, untilV shoulder 35` raises arm 33 to liberate stud 3 2, whereupon spring 21 will project bolt 20- intol engagement with a keeper 43 of door frame 14.

Saat-)e125 with' ashbuiaer The door is then locked by means of lock` 11 in the usual manner. u If, a burglar should attempt to enterthe apartment through door, 11, and,l 1f he should succeed in opening lock 11, he will' iind the door still locked. He will thus assume that the same must be bolted from the inside by the person or persons occupying the apartment, and will abstain from torcibly opening the door. The reason for setting' collar 28 back from the end of spindle 26 is to prevent the opening of the. safety lock by means of a screw driver or a similar tool. Itsisobvious that the head of spindle 26, which enters key hole 39, inay be shaped diiierently for the use o keys, others than that shown in Fig. 8, Without departing from the spirit of niy invention.

lhen the occupant returns to his apartment, he will readily gain access thereto by successively opening the regular lock. and the safety lock,

VI claim:

l. A device of the character described, comprising a door, a lock secured thereto and having a key hole, a safety-lock, a bolt. slidable therein, and a spindle rotatably mounted in the safety lock and operatively connected to the bolt, said spindle projecting partly into the key hole ot' the first named lock, substantially as specified.

2. A device of the character described,

comprising' a door, a loclr secnredjthereto and having a key hole, a safety-lock, a bolt slidable therein, a spindle rotatably mounted in the safety lock and operatively connected the bolt, and a collar on the spindlevt-hat is received Within the key hole ofthe/'first named lock, substantially as specified.

3. A safety lock comprising a springinfluenced bolt having a toothed section, a.

stud on the bolt, a mutilated pinion adapted to engage the toothed bolt section, a resilient arm adapted to engage the stud, and a shoulder on the pinion adapted to engage theV arm, substantially as specified.

Signed by nie, at New York city, (Manhattan,) ll, Y., this fourth day of J une,

JOSEF HERR. VVitnesse-s ARTHUR E. ZUMPE, lV. R. SCHULZ.