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Publication numberUS1046438 A
Publication typeGrant
Publication dateDec 10, 1912
Filing dateJun 22, 1912
Priority dateJun 22, 1912
Publication numberUS 1046438 A, US 1046438A, US-A-1046438, US1046438 A, US1046438A
InventorsJohn Caldwell
Original AssigneeOtto J Schwarzler
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1046438 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




Patented Dec. 10, 1912.




1,046,438. Patented Dec. 10, 1912.


' 5] wuewboz To au colauurexh COLUMBIA PLANOGRAPH 60., WASHINGTON. D C



Specification of Letters Patent.

Patented Dec. 10, 1912.

T 0 all whom it may concern:

Be it known that I, JOHN CALDWELL, a citizen of the United States, and a resident of New York, county and State of New York, have invented a certain new and useful Improvement in Door-Locks, of which the following is a full, clear, and eXact specification.

This invention relates to a class of locks adapted for use .in conjunction with the doors of buildings, or other structures, and embodies an improved form of certain parts of the door lock shown in my Patent No. 1,028,929, issued June 11, 1912. In this form of door look I employed a split cylinder in which is a rotatable key barrel. On one half of the cylinder provision is made at quarter turns for receiving tumbler pins which fit in suitable recesses and are subject to the action of springs. A key slot 6X tends from the outside inwardly of the barrel, and said slot is provided with lateral apertures on one side which correspond with the position of the tumbler pins so that they may drop from the recesses of the cylinder into the apertures of the barrel. There are two sets of tumblers, and when in looking contact one set will be partly within the cylinder and partly within the barrel. The insertion of a key in the slot of the barrel will force the set of tumblers projecting in the apertures of the barrel back to its peripheral edge and into the recesses of the cylinder. By turning the key the barrel is rotated one quarter of a circle for unlock ing the lock and may be reversely turned for looking it, thus limiting the operation of the lock and making it somewhat confusing to understand. Moreover, to the key barrel is connected one end of the shank of a knob so that the key barrel and the knob cannot be operated separately for looking or unlocking a door.

My present invention has for its object primarily to overcome these objections by providing a door lock which is adapted to be locked, or unlocked by the use of a key when turned to various determined portions of a circle, or by manually rotating a knob independently of the employment of a key. This is accomplished mainly by providing a cylinder adapted to carry any desired number of spaced sets of tumblers, or yielding locking elements, and in the cylinder is a rotatable barrel having a key slot and a communicating recess so that by turning the barrel with a key for a determined distance the door may be locked, or unlocked as clesired. In movable engagement with the barrel is one end of the spindle of a knob and in this end of said spindle is a recess in register with the slot of the barrel so that when a key is employed to operate the lock it will be received in the recess of the spindle so that it may be operated in unison with the barrel, or the'knob may be rotated separately for revolving the spindle.

A further object of the invention is to provide a lock of simple and efiicient construction, and which is susceptible of being made so as to be adapted to be applied upon any suitable door.

With these and other objects in View, the

invention will be hereinafter more particularly described with reference to the accompanying drawings, which form a part of this specification, and will then bepointed out in the claims at the end of the description.

In the drawings, Figure 1 is a fragmentary side elevation, partly broken away, and partly in section, of a door and its frame taken on a line II of Fig. 2, showing the casing, the bolts, and connecting parts of my improved door lock. Fig. 2 is a fragmentary vertical longitudinal section, partly in detail, of the lock and the door. Fig. 3 is a front elevation of the key barrel, cylinder, and shell of the lock. Fig. 4 is a section taken on the line IIII of Fig. 2. Fig. 5 is a section taken on the line III-III of Fig. 2. Fig. 6 is a section taken on the line IVIV of Fig. 5. Fig. 7 is a perspective view of the spindle, of the lock. Fig. 8 is a side view of the spindle, and Fig. 9 is a top plan of one of the brackets employed on the door frame.

The device, or lock 10 may be applied upon the inside of any suitable door, as 11, which is preferably hinged so as to swing in a frame, as 12, constructed in a building, or other structure. The lock has a casing 13 which is substantially rectangular, or may be of any preferred shape, and said casing is provided with a base-plate 14, a front-plate 15, side walls 16 and 17, an upper wall 18,

- and a lower wall 19. The base-plate let may be fastened to the door by screws 20, or otherwise, and the front-plate may be secured to the base-plate by bolts 21, or the like. Through the door is a large opening 22, and through the base-plate 14 and frontplate 15 of the casing are-alined openings 23 and 24 which are inregister with the opening in the door, but are considerably smaller in diameter. Midway of the side wall 17, the upper wall 18, and the lower wall 19 of the casing are openings 25, 26, 27. A boss or annular flange 28 is provided upon the base-plate 14 at the wall of the opening thereof, and said annular flange extends inwardly of the casing. Rotatable upon the annular flange 28 is a concentric flange 29 of a shank 30 which extends some distance through the opening 24 of the front-plate 15, and upon the free end of said shank isa knob 31 held rigidly to the shank by a screw 32, or the like so that the shank will be rotated when the knob is manually revolved.

Upon one end of the concentric flange 29 is an integrally formed ring 33, and to said ring may be pivoted one end of one or a plurality of links, or levers 34, 35, 36. To the opposite end of each of the links 34, 35, 36 are pivoted one end of bolts 37 38, 39, two of which are adapted to be moved vertically and one laterally in unison when the shank 30 is revolved by the rotation of the knob 31, and each of the bolts 37 and 39 are movable in guides 40 and 41 provided upon the front plate 15 and extend into the casing 13. All of the bolts 37 38, 39 are also movably guided through openings in the casing and through brackets 40, 41, 42 secured at the ends or sides of thedoor, and also upon the frame of the door are fastened brackets 43, 44, 45. One of the brackets 43, 44, 45 are in alinement with one of the brackets 40, 41, 42 so as to receive the free end of the bolts when moved to lock the door to the frame, and each of the brackets'43, 44, 45 are oval in shape so as to allow the ends of the bolts to be freely received in the brackets should said bolts be thrownout of alinement therewith by reason of shrinkage of the door or its frame. When the knob 31 is turned from right to left the shank 30 will be correspondingly rotated, and the levers 34, 35, 36 will be moved so as to direct the bolts into the brackets 43, 44, 45. The door will then be locked to the frame, and may be unlocked when the action of these parts are reversed by turning the knob from left to right. The above described parts of my door lock are substantially the same as shown in my Patent No. 1,028,929 and I desire it to be understood that I do not-claim in this application any part thereof as being new and novel.

For the purpose of permitting the bolts 37, 38, 39'and the levers 34, 35, 36 to be moved in unison through the medium of a.

key for locking and unlocking the door independently of the knob 31, through the shank 30 of said knob is a square or angular the spindle proper is a recess 49 which is formed in the shape of across so as to receive the end of a key when positioned either vertically or transversely. The head 48 of the spindle is movably seated in an annular flange 50 of a key-barrel 51 which is rotatable in a tumbler cylinder 52 disposed in the end of the opening 22 of the door which is opposite to the lock ,casing'so as to be upon the outside of the door.

The tumbler cylinder 52 is preferably formed in two parts, as shown in Fig. 5. In one part of the cylinder are recesses 56 and 57 into which is snugly seated corresponding pins provided upon the second part when both parts are assembled. The cylinder 52 is held against rotation by being secured to the base-plate 14 of the lock casing by means of a number of bolts, or screws 58. One part of the peripheral edge of said cylinder is threaded so that the threaded end of a ferrule or shell 59 may be screwed thereon, and the opposite end of said ferrule is flanged so as to provide a neat finish for the look upon the outer face of the door when in place for operation. In the wall of the cylinder 52, and communicating with its passage are a number of series of alined recesses 60 which are radially disposed with respect to the axial center of the cylinder. I prefer to employ one series of the recesses at each part of the cylinder-corresponding to a quadrant thereof, as illustrated, though it is evident that I may provide one or any suitable number of series of these recesses. In each series of the recesses 60 are sets of movable tumblers 61, one tumbler being disposed in each recess, and serving to force each tumbler in a direction outwardly of said recess and toward the key-barrel 51, in each recess is a spring 62.

Longitudinallythrough the key-barrel 51 is provided a key slot 63 which communicates with the cross-shaped recess 49 of the head 48 of the spindle 47. In one part of the wall of the key barrel 51 is also a recess 64 which communicates with one edge of the key slot 63, and said recess 64 adapted to be registered with each of the series of alined recesses 60 of the cylinder to receive one of the sets of tumblers 61 for locking the key barrel, the cylinder, and the other parts of the lock. To move the levers 34, 35, 36 and the bolts 37, 38, 39 by the use of a key so as to lock or unlock the door the key is inserted in the slot 63 of the keybarrel 51 and its end will be guided into the recess 49 of the head 48 of the spindle. The set of tumblers seated in the recess 64 of the key-barrel will thereby be forced by contact with the key to the peripheral edge of the key-barrel and back into their recesses of the cylinder. By turning the key from right to left one-quarter of a circle, or turning it so that the recess 64 of the barrel will be in register with the next set of tumblers the spindle 47 and the knob 31 will be rotated for withdrawing the bolts 37, 38, 39 from engagement with the brackets 43, 44, 45 so as to unlock the door. On extracting the key the second set of tumblers will be partly forced into the recess of the key barrel, and the barrel and its cylinder will again be locked together. The door may then be locked from the inside independently of the use of the key by simply turning the knob 31. By repeating the use of the key in this manner and turning the door knob as described the door may be locked or unlocked whenever desired without reversing the rotation of the key barrel, though it is evident that the key may be employed for locking the door as well as unlocking it by turning it from left to right after being inserted in the slot of the barrel.

In the foregoing description I have embodied the'preferred form of my invention, but I do not wish to be understood as limiting myself thereto, as I am aware that modifications may be made therein without departing from the principle, or sacrificing any of the advantages of this invention, therefore I reserve to myself the right to make such changes as fairly fall within the scope thereof.

Having thus described my invention, I claim as new and desire tosecure by Letters Patent 1. In a door look, a spindle having a locking bolt movably connected thereto, and a knob upon one of its ends, a head formed upon the opposite end of the spindle, said head having a recess therein, a cylinder, a

barrel rotatable in the cylinder, an annular flange formed upon one end of the barrel and movably positioned over the head of the spindle, said barrel having a slot therethrough which communicates with the recess of the head of the spindle whereby a key when inserted in the slot will be received in the recess of the spindle soas to rotate the spindle simultaneously with the rotation of the barrel, or to permit the spindle to be rotated independently by manually rotating the knob.

2. In a door look, a cylinder having a plurality of series of alined recesses disposed radially with respect to its axial center and all of the recesses communicating with the interior of the cylinder, a plurality of sets of yielding tumblers, each set being movable in one of the series of alined recesses of the cylinder, a barrel rotatable in the cylinder, said barrel and having a recess in 1ts wall in communication with one edge of the slot, said recess being adapted to receive each set of the tumblers of the cylinder separately when the barrel is rotated by a key so that its recess is in register with the corresponding series of alined recesses of the cylinder, an annular flange extending from one end of the barrel, a spindle having locking bolts movably connected thereto and having a knob upon one of its ends, and a head formed upon the opposite end of the spindle and movably seated in the annular flange of the barrel, said head having a cross-shaped recess therein which communicates with the slot of the barrel whereby a key when inserted in the slot will be received in the recess of the spindle so as to be rotated simultaneously with the rotation of the barrel, or to permit the spindle to be rotated independently by manually rotating the knob.

This specification signed and witnessed this twenty first day of June, A. D. 1912.




copies of this patent may be obtained for five cents each,

by addressing the Commissioner of Patents,

Washington, D. G.

having a key slot therethrough

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2862381 *May 14, 1953Dec 2, 1958Mefina SaLock having a sliding bolt
US3203210 *Feb 8, 1963Aug 31, 1965Yale & Towne IncCylinder lock
US3975934 *Mar 20, 1975Aug 24, 1976David BabaiKey-operated door locking device
US3992909 *Jun 24, 1975Nov 23, 1976Mcghee John SSafety release for automobile trunk
US4577478 *Aug 26, 1983Mar 25, 1986Economopoulos Dennis OLocking filler tube cover apparatus for underground fuel tanks
US4620733 *Jul 2, 1985Nov 4, 1986The United States Of America As Represented By The Secretary Of The NavyShipboard internal locking system
US5339663 *Jul 29, 1992Aug 23, 1994Carl Fuhr Gmbh & Co.Lock cylinder
US5911763 *Jan 12, 1998Jun 15, 1999Quesada; Flavio R.Three point lock mechanism
US6508087 *May 29, 2001Jan 21, 2003Mobile Mini, Inc.Locking system for containers
US7841221 *Mar 7, 2007Nov 30, 2010Haworth, Inc.Lock assembly for a storage cabinet
US8347665 *Mar 29, 2010Jan 8, 2013Liberty Safe And Security Products, Inc.Self-balancing locking mechanism for doors
US8366216 *Jun 22, 2010Feb 5, 2013Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd.Drawer and electronic device using the same
US20070227205 *Mar 7, 2007Oct 4, 2007Eric HillLock assembly for a storage cabinet
US20110174025 *Mar 29, 2010Jul 21, 2011Rasmussen Terry DSelf-balancing locking mechanism for doors
US20110187249 *Jun 22, 2010Aug 4, 2011Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd .Drawer and electronic device using the same
U.S. Classification70/358, 70/120, 70/379.00R
Cooperative ClassificationE05B27/00