US1058043A

US1058043A - Door-lock.

Info

Publication number: US1058043A
Authority: US
Inventors: William J Dunn
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-04-04
Filing date: 1910-04-04
Publication date: 1913-04-08
Anticipated expiration: 1930-04-08

Description

UNITED STATES PATENTv OFFICE.

WILLIAM J'. DUNN, 0F MONTREAL, QUEBEC, CANADA.

DOOR-LOCK.

Specification of Letters Patent.

Patented Apr. s, 1913.

Application led April 4, 1916. Serial No. 553,373.

'door latches and the object is to provide an inexpensive and durable latch lock which may be applied to a door with great ease j door to receive the lock and to bore a holel and rapidity.

At the presenttime, the method of applying mortlse latches or locks to doors is to cut a deep, narrow recesslin the edge of the through the door, intersecting this recess, for the latch spindle. A second mortise is cut in the door jamb to receive the latch. Considerable di'liculty and loss of time is experienced in fitting the lock into this recess and in attaching the lock, handle plates, etc., to the door and door jamb by means of screws. This invention aims to overcome these disadvantages by providing a latchlock which may be inserted without the use of screws and without the necessity of forming the usual large recess in the edge of the door.

The device consists of a spring bolt inclosed in a cylindrical tube and connected to a removable spindle by a air of pivotally mounted links. Inside and) outside handles are provided, the latter of which is loose on the spindle and connected thereto by a sliding bar controlled from a helically grooved sleeve on the shank of the inner hand/le. A lock barrel is provided in the outside handle whereby a suitable key may be used to rotate tha spindle to open the door from the outs1 e.

In the drawings which illustrate my inventiony-Fi ure 1 is a vertical section is bored through the door near the edge thereof and a second hole 15 is bored in the edge of the door so as to connect with the hole 14. The usual handle lates 16 are provided on each side of the oor covering the ends of the hole 14 and forming bearings for the inside and

outside handles

17 and 18 respectively. These plates are provided with a plurality of integral spikes 16 projectin rom their inner surfaces. The latch spind e 19 connecting the two handles is preferably round and provided with a radial slot 20 extending from the inner end of the spindle to a point within the shank of the outside handle 18. The inner end of the spindle is also bored out to form a tubular portion 21 adapted to contain the cylindrical end 22 of the kspindle latch 23, the blade 24 of the latch lying in the slot 20 in the spindle. The outside handle 18 is loosely mounted on the spindle 19 so that it is free to turn thereon. This handle is revented from coming ol" the spindle by a li-shaped pin 25 which is inserted throu h one of a pair of slots 26 in the shank 0% the handle and is ada ted to engage a circumferential groove 27 ormed on the spindle, as shown in Fi s. 1 and 5. A small portion 28 of the han le shank projects through the plate 16 into the hole 14 in the door and is provided with a slot or notch 29 for the reception of the blade 24 of the spindle latch 23. It will be readily seen that when the blade of the spin- Adle latch en ages in the slot 29 of the outside handle, the andle wil?` be rigidly connected to the spindle and when turned will rotate the s indle, but that when the blade 24 is with rawn from the slot 29, the handle will be disconnected from the spindle in so far as the rotation of the spindle is concerned.

In order that the spindle may be rotated from the outside when the outside handle is disconnected, I provide a lock barrel 30 located centrally in theoutside handle 18. It will be noted in Fig. 1 that thespindle 19 extends through the shank of the outside handle and approximately half waythrough the handle itself., The lock barrel 30 at its outer end is flush with the surface of the handle and at its inner end 31 is tubular and is revolubly mounted on the projecting extremity of the spindle 19. The lock barrel is independently revoluble with respect A'to the spindle but is held longitudinally rigid by a U-shaped member 32 engaging a groove 33 in the spindle, similarly to that' shown in Fig. 5. A key aperture 34 is formed eccentrlcally through the barrel 30 and a similar aperture 35 is formed in the end of the spindle and is adapted to register with the aperture 34 in the barrel. A center pin 36 may be located in the spindle aperture 35. A small recess 37 is formed inthe key a ert-ure for the reception of a ward on the ey in order that the key may.

readily turn the barrel 30. In order that the key apertures 34 and 35 may be always in line to allow the easy insertion of the key, I provide a small helical spring 38 connecting the lock barrel and the spindle. This spring is preferably located in a shallow circumferential groove 39 formed in the spindle within the tubular portion 31 of the barrel. One end of this spring is fixed to the spindle and the other end to the barrel, the spring being wound loosely three or four turns in the groove 39. Thus whichever direction the barrel is turned on the spindle, the spring is distorted and when the barrel is released the spri returns to its normal condition and rotates t e barrel sufficiently to aline the ke apertures 34 and 35.

The inside end of t e spindle is provided with a. fine screw thread and the shank of the inside handle is internally threaded with a corresponding thread, so that the handle may be screwed out of the s indle. A longitudinal slot 40 is formed 1n the shank of the inside handle and the shank is surrounded b a loose sleeve 41 having therein a helical s ot 42 extending approximately half around the sleeve. A pin -43 passes through the sleeve and shank slots 42 and 40, and is forced into the cylindrical portion 22 of the spindle latch 23. By rotating the sleeve 41 on the handle shank the pin 43 is forced to move longitudinally of t-he spindle, by reason of the pitch of the helical slot 42, and thereby moves the spindle latch so that the blade 24 thereof engages or disengages the slot 29 in the shank lof the outside handle.

The latch which holds the door closed is located in the hole 15 and comprises a cylindrical tube 44 of suitable length inserted in the hole 15. This tube 44 1s rovided at the inner end with an internal an e 45, and at the outer end with an external ange 46 which prevents the tube being drawn through the hole 15 when the latch is o erated. The latch bolt 47 is cylindrica in form and rovided with a beveled outer end 48 in t e usual manner. A horizontal slot 49 is formed in the latch bolt extending a suitable distance from the inner end and this slot is crossed at the. inner end of the bolt, by a pin 50. A small crank disk 51 is located on the spindle 19, and 'is held a inst revolution thereon bythe blade 24 o the spindle latch which pro.'ects beyond the circu ference of the `s in le and acts as a key, a seen in' Figs. land 3. A short 05 thereof loutwardly turned, passes through' Urshaped pin 5 2 having the extremities 53 apertured extremities 55 of the link. A

helical spring-56 of suitable strength is located in the tube 44 and slight-ly compressed between the inner end of the latch olt and the flange 45 of the tube.

The latch plate on the door jamb 13 is replaced in this invention by a short tube 57 of the same diameter as the tube 44 and having an external flange 58 at the outer end similar to the flange 46. This tube 57 is forced into a shallow hole 59 bored in the door jamb.

When mounting the latch on a door, the

holes

14 and 15 are bored in the door, as previously described, and the holeV 59 is bored in the door jamb in such a position as to register with the hole 15. The two handle plates 16 are then placed in position to cover the ends of the hole 14, the spikes 16a holding them against revolution. The latch tube 44 containing the latch bolt and spring and carrying the crank disk 51, is then driven into the hole 15 until the outer end thereof is flush with the edge of the door, as seen in Fig. 2. The short tube 57 is also driven into the hole 59 in the door jamb in the same manner. The outside handle 18 carrying the latch spindle is placed in position, the spindle being passed through the disk 51. The spindle latch 23 is next inserted so that it keeps the disk 57 to the spindle and enters the slot 29 in the shank of the outside handle to hold the spindle a ainst revolution inde endently of the outside handle. The insidie; handle 17 carrying the sleeve 41 on its spindle is now screwed on to the threaded inner end of the'spindle a sufficient distance. The inside handle is adjusted unt-il the slot 40 in the shank thereof registers with the slot in the spindle, and the pm 43 is then passed throu h the helical sleeve slot 42 and slots in the andle shank and spindle and driven into the cylindrical portion of the spindle latch. By reason of the fine threads on the spindle, the handles may be adjusted to turn easily without there being enough slack motion to cause rattling. It will be easily understood from Fig. 1, that when the pm 43 is in place it holds the inside handle against revolution on the spindle s that when the handles are once adjusted they cannot work either tight or loose. `It will be seen in Figs. 1 and 2 that the shanks of both handles are shouldered at 60 and that these shoulders bear against similar shoulders 61; below the surface of thel plates 16, in the usual manner. l y

The operation of the latch is very lsimple. As long as the blade 24 re'mains in the slot is forced back by its beveled end engaging 29 of the outside handle, the latch may be operated in the usual manner by either' handie. lVhen it is desired to make the door openable from the inside only, the sleeve 4l is rotated to withdraw the blade 24 of the spindle latch from the slot 29 of the outside handle. The outside handle then rotates freely on the spindle but will not ,turn the same to operate the latch, while the inside handle remains fixed to the spindle. lVhen the spindle is turned by' either handle it carries the disk 5]. with it so that the latch bolt 47 is drawn back through the medium ot the pin 52 and link 54, compressing the spring 5G, as will be readily understood from Figs. 2 and 3. Then the outside handle is disconnected from the spindle the latch may be operated by means of a suitable key inserted in the key apertures 34 and 35 which connects direct-ly with the spindle and will rotate the spindle when turned. The pin 36 in the key aperture 35 in the spindle is for the purpose of prevent-ing the introduction ot' any instrument, other than the proper key, to rotate the spindle. Any such instrument introduced in the key aperture 3l of the lock barrel, will be inellectual, as the barrel revolves independently of the spindle and outside handle. 'lhe pin connecting the outside handle to the spindle is kept in place when the latch is mounted on a door by the flange G2 of the outside handle plat-e 16. When the door is closed without turning the spindle, the latch bolt the jamb plate. The bolt recedes and compressesthe spring but does not yoperate the rest of the mechanism as the pin 50 moves between the arms of the link and the slot 49 in the -bolt vprevents the bolt from shifting the link, as -will be seen m Figs. 2 and 3.

No screws are used in assembling the parts ot the latch nor in attaching the same to a door. Moreover, 'che tedious operation of mortisng a .lock recess in. the door and a latch recess in the door jamb is eliminated, as these recesses are replaced by simple auger holes which may be made with great ease and accuracr .in a `few seconds, and which do not wea ren the door and Vjamb as do the mortised recesses. Furthefmore, there is no keyhole to be made or keyhclc plateV to be adjusted. The latch is simple in construction and not liable to get broken or out of order, and may be manufactured at small cost.

Other advantages will be obvious to those skilled in the art to which the invention relates.

Having thus described my invention, what I claim is 1. In a latch lock, a revoluble spindle, an inside handle rigid therewith, an outside handle revolubly mounted of. said spindle, a disk mounted on the spindle between said handles, a latch, a link connecting the lato-L and disk, a bar holding said disk and outside handle against revolution on the spindle, and a revoluble sleeve on the inside handle for shift-ing said bar to allow the outside handle free revolution on the spindle.

2. In a latch lock, a slotted spindle, an inside handle mounted at one end thereof, an outside handle revolubly mounted at the opposite end of said spindle, a. disk mounted on the spindle between said handles, a latch, a link connecting the disk and latch, a bar mounted in ,said spindle slot holding the disk and outside handle against revolution, a pin carried by said bar holding the inside handle against revolution on the spindle, and a revoluble sleeve on the inside handle engaging said pin for shifting the bar to allow the outside handle free revolution on the Spindle.

3. In a latch lock a revoluble spindle, a handle at each end thereof, a crank disk mo'unted on the spindle between said handles, a tube, a slotted latch bolt slidable therein, a pin crossing the rear end of said slot, a U-shaped pin in the periphery of said 1disk having the extremitles thereof outwardly turned, a U-shaped link hooked around the bolt pin and naving the extremities thereof pivotally mounted on the outwardly turned extremities of the disk pin,

and a helical spring in the tube compressible on the retreat of the bolt In witness whereof I have hereunto set my hand in the presence of tvo witnesses. WILLIAM J. DUNN. Witnesses:

STUART R. W. AMEN, E. R. McKENzm.