US1674737A

US1674737A - Cylinder lock

Info

Publication number: US1674737A
Application number: US611686A
Authority: US
Inventors: Harry B Page
Original assignee: Sargent and Co
Current assignee: Sargent Manufacturing Co
Priority date: 1923-01-09
Filing date: 1923-01-09
Publication date: 1928-06-26
Anticipated expiration: 1945-06-26

Description

June 26, 1928.

H. B. PAGE CYLINDER LOCK Filed Jan. 9, .1923

Patented June 2e, 192s.

. UNITED HARRY B. PAGE, or As'r HA EN; CONNECTICUT, ASSIGNOR rosnnen'ivra COMPANY,

or new HAV N. CONNECTICUT.

CYLINDER Loon.

A'pplication filedtJamiary 9,1923. Serial No. 611,686.

This application relates-to cylinder vlocks and more especially to the provision of anarmored or hard metal front or casing; to!" looks of-this character, so tha'tsanyattempt to render the lockuseless or ineffectual-by drilling into the front thereof may be true-.5

trated.

the drawings accompanying the application,

der looks as well.

In some types of locks,and especially 1n 16 may, by drilling into the lock in the plane plug may then be turnedfreely to unlock the door. Such an operation is usually-per: formed by drilling iii-through the face of the lock cylinder-,which must necessarily be made of metal sufficiently soft to admit of 7 of. which will be equal. tothe thickness of being bored by a drill. I

One object of my invention is to overcome the disadvantage named above and. to proa vide a lock cylinder with a hard metalffront which will withstand the. action of a drill. Another object of myinvent ion is to pro: vide a lock with an armored front, of this character, secured or attached to, the} lock in a novel way. '.:.l

A still'further object of my invention is,

to provide an armored lock cylinder of the character described, which shall be simple in construction and economical to manuface I shaped piece of hardened steel or the like true and assemble. f

To these and other ends, the invention consists in' the novel features and combinaand claimed. I

' In the accompanying drawings:

Fig. 1 is a front elevational View of aqlock cylinder embodying my invention," I

Fig. 2 a sectional View of line 2 -2 of Fig. 1; ,1;

Fig. is a sectional View OIltllIlG 3 -3 of Fig.2; Fig. 4 is a front elevational; view-showing the method of'assembly of the parts of they lock; V Y

ig. 5 1s a sectlonal View on hne 5v-.-5,-of Fig. 3;

Fig.

it will be understood that myginvention'is not limited in all of its aspects to such locks, but may be appliedto other types of cyhn:

' serted, it may be rotated within the cylthe case of pin tumbler locks, andntruder.

tions of parts to be hereinafter described;

G is a sectional View on line 66 ofv Fig. 2 with the key barrel removed; while" Fig. 7 is a'section;throughthe hardened front. plate of the lock corresponding to line 77 of Fig.' 6, thelockcylinderbeing shown in elevation. i 1

In the form of my invention which I have chosen to illustrate and describe, I have u 4 :ishowna lock cylinderat 10 provided with WVhile I have shown pin tumbler locks 1n the usual pin tumbler openings 11, and akey 14 so that when the proper key-is in-,

inder 10, and a lug 15, eccentrically mounted upon the rear end of the key barrel, will serve to raise a bolt or thelike mounted i n.-

. the recess 16 in the cylinder." To retain the 7 key plug within the cylinder, arecess orslot [17 .is formed inthe plugand a pin or'jscrew" the armored frontfZl, so that after the front has'been applied,the exterior of the cylin- [der will be of the same diameter throughout. Forwardlyof this shoulder and at dimay be cut awayas at 22'and 23 in's'egmental" form,- and opening into these

segmental recessesare slots

24 and 25, which slots do not, howevelyas clearly shown in ;F ig. 5, extendto the front face of the cylinder as do the cut-

away portions

22 and 23.

The armored front 21 consists of a cup ametrically opposite portions, the cylinder having a front face of the same diameter as that ofthe body ofthe cylinder 'lock,'and I provided with a peripheral wall or flange" 126 extendingat right angles to the front face. Projectinginwardly from this flange or wall are a pair of oppositely disposed f, lugs 27 and 28which may be'formed so that their lengths are substantially.equal to the al- [titudes of the

segments

22 and 23;

This front plate is provided with an openmg 29v through-which the key barrel extends,

and this opening isso disposed "relativelyto the lugs 27 and28 that it will bein align- "ment with the key barrel opening in the lock 1 cylinder when the

lugs

27 and 28 are located in the

grooves

24 and 25. I 1 When the parts are made 1n themanner described, and it is desired to assemble the lit) cup-shaped member is placed by a longitudi nal thrust upon the shouldered end of the cylinder with lugs, 27 and 28 in the segmental cut-out

portions

22 and 23 as shown in 4. It will be apparent that when the parts are in this position, a relative rotative movement will move the lugs from the cut-out

portions

22 and 28 into the notches or slots 24 and25 from which they cannot be dislodged by a direct longitudinal pull. In fact the armored front can only be removed by a reverse i otative movement which again disposes the lugs in the cutout portions 22 and 23.1 llv ith the parts in the position shown in Fig. 3 wherein the lugs are engaged in the slots, the opening 29' in the armored front is opposite the key plug opening in the cylinder, and if the key plug is now inserted its head 31, which lies Within the opening 29, will prevent a. reverse or any further rotation of the armored front. The Withdrawal of the key plug will then be; prevented by the insertion of the key plug pin 18, and the parts Will be effectually and permanently assembled in a very convenient and satisfactory manner.

Itwill be seen that while the armored front described Will protect the pin tumblers which are located in the cylinder, the turnblers which are within the key barrel will not b e so protected, due to the fact that they willlie opposite the opening 29. In order to protect the tumblers in the key barrel from the drilling operation described, a pin 32 of hardened steel or the like may be inserted in the head or shoulder at the front of the key barrel and in alignment With the pin tumblers therein. It Will then be impossible to drill through the line of tumb'lers in the key barrel as the drill,- upon striking thispin, will be unable to pierce it and will be diverted to one side-, and thus sever the pin tumblers of the look.

It will be apparent that the recessed or

cutout portions

22 and 23 provide longitudinal passage ways upon the periphery of the lock Which communicates with the

peripheral grooves

24 and 25 in a manner similar in many respects to the longitudinal and transverse grooves which formed a part of the joint usually termed a bayonet joint. In other words, it may be correctly stated that the front plate and applicants lock is secured upon the cylinder by means of a bayonet oint;

lVhile I have shown'and described a preferred embodiment of my invention, it will be understood that it is'not limited to all the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the appended claims.

What I claim isi 1. A look cylinder and a hardened plate will; not

for the front of said cylinder, and cooperating engaging means upon said cylinder and plate whereby said plate may be applied directly to the cylinder and then rotated to a locking position. J

'2. A lock cylinder and a front plate for the same, said plate having an axially projecting flange extending along the curved surface of the. cylinder and cooperating means upon said cylinder and flange Whereby the plate may be applied to the cylinder by a longitudinal thrust and then rotated to a locking position.

3. A look cylinder the-same, said cylinder and plate liavingcooperating grooves and lugs whereby they maybe secured together by a relative rotative movement.

and a front plate for i 41A lock cylinder and a front plate therefor, said plate havinga circumferential flange adapted to extend along the body of the eyhnden: said flange and cylinder having cooperating grooves and projecting lugs whereby they may be secui'ed together by a relative rotative movement:

5'; A look cylinder and a hardened front plate for the same, said plate having a circumferential flange adaptedto lie along the body of the cylinder, a lug provided upon said flange, and a lug receiving groove provided in the periphery of the cylinder Whereby the plate may be attached thereto.

6. A lock cylinder and a. front plate therefor, said cylinder having a transverse groove formed therein adj acent' one endjthere'of and a passage Way leadinginto said groove from" the front edge-of the cylinder, and saidp'late having a lug toenter saidpassage Way and grooves. p

75A lock cylinder and a hardened front plate therefor, said cylinder having a e ripheral groove formed therein adjacent one end thereof and'a' passage way leadinginto said groove from the front edge of the cylinder, and said plate having a lug to enter said passage Way by a direct longitudinal thrust whereby it may then rotated in said groove.

8. A look cylinder provided with a transverse groove and a passage way leading from the front face of the cylinder into said groove to provide an attaching means for a plate.

9. A look cylinder and a hardened front plate therefor, means to secure said plate upon the cylinder by a rotative movement; and means to prevent a reverserotation and removal of said plate.

10. A lock cylinder and a. hardened front plate therefor adapted to be applied to the cylinder by a direct longitudinal thrust and.

then rotated to locking position, andineans to prevent a reverse rotation of said plate to prevent its removal from the cylinder.

11. A lock cylinder, a hardened front plate therefor adapted to be applied to the cylinder by a direct longitudinal thrust and then rotated to a predetermined position, and means to secure the plate against rotation from this position. i

12. A look cylinder and ahardened front plate therefor, both said members having openings adapted to be aligned with each other to receive a key barrel, means for securing the plate to the cylinder when the former is applied to the latter, and rotated to bring said openings into alignment, and means to prevent further rotation of said plate.

13. plate adapted to be applied thereto by a longitudinal thrust, both said members be ing provided with openings to receive a key barrel, means to permit such application only when said openings are out of alignment, said plate being then rotatable to align said openings, and means to secure the plate upon the cylinder in said position of alignment.

14. A look cylinder and a hardened front plate therefor, said plate being adapted to be secured thereon by a rotative movement,

both said members having key barrel receiving openings which are aligned when said plate is secured upon said cylinder, and a key barrel secured in said openings to prevent rotation of the parts from said position.

15. A look cylinder and a hardened front plate therefor, said cylinder being provided with a peripheral groove and a longitudinal passage way opening into said groove from the front face of the cylinder, said plate being provided with a lug to enter said passageway and then to be rotated in said groove, bothsaid cylinder and plate being provided with key barrel openings which are eccentric when the lug is in said passage way, but which may be aligned by the, rotation of the lug in the groove and a key barrel inserted in said aligned openings to prevent rotation of the plate from said position.

16. In a look, a lock cylinder, a hardened front plate therefor, and secured thereto by a bayonet joint. I

17. In combination, a lock cylinder, a protective facing therefor provided with a peripheral flange, said cylinder being tele scopically received in the flange, and means eflective after a relative rotation of the parts to lock the facing to the cylinder.

18. In combination, a lock case, a protective facing therefor, both of said members being provided with key barrel openings, interengaging means upon said case and facing to securethe two together, said means being capable of disengagement to permit separation of the parts only when the key barrel openings are out of register.

A look cylinder and a hardened front.

19. In combination, a lock case, a protec- V tive facing therefor secured thereto by a rotative movement, 'a key barrel mounted in openings in said case and facing, and means including said key barrel to prevent removal of the facing from the case.

20. A look cylinder'and a protective facing therefor, said facing being applied directly to the cylinder and then rotated' through a partial revolution, and means effective upon said rotation to prevent separation of the facing and cylinder.

21. A look cylinder and a hardened front plate therefor, said cylinder having a. peripheral groove formed therein ad]acent=- one said groove from the front edge of the cylinder, the plate being provided with a end thereof, and a passageway leading into lug to enter said passageway and groove,

turned lug at the rear end of said encircling portion to enter a recess in the case to secure the armor thereon.

24. In combination, a lock cylinder, a protecting armor therefor, said armor comprising a cylindrical portion encircling the cyl-, inder, and having means at each end thereof extending inwardly to embrace a part of the lock cylinder therebetween to prevent removal of the armor.

25. A look cylinder and a front plate therefor, said cylinder and plate having cooperating means whereby they may be secured together, said means being adapted to being brought into engagement by a rotative movement of said plate on said cylinder, and means to prevent reverse rotation of the plate.

26. In combination, a lock cylinder, a protective face member thereforprovided with a. flange extending axially of the cylinder, said face member being applied to the cylinder with the latter and the flange in tele- HARRY B. PAGE.