US450207A - Sanford k - Google Patents

Description

(ModeL) 2 Sheets-Sheet .2. S. K. WEYMOUTH. COMBINATION LOCK.

Patented Apr. 14', 1891.

\ baryblsd If Wgymouth UNITED STATES PATENT OFFICE.

SANFORD K. \VEYMOUTH, OF GARDINER, MAINE, ASSIGNOR TO THE WEYMOUTH LOOK COMPANY, OF SAME PLACE.-

COMBINATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 450,207, dated April 14, 1891. Application filed July 11, 1890. $erial1l0- stems. (ModeL) To all whom it may concern.-

Be it known that I, SANFORD K. WEYMoUTH, a citizen of the United States, residing at Gardiner, in the county of Kennebec and State of Maine, have invented a new and useful Oombination-Lock, of which the following is a specification.

This invention relates to combinationdocks and it has for its object to construct a device of this class which shall be simple, inexpensive, and easily operated, and which shall be capable of being successfully applied to ordinary door locks and latches.

My invention consists in the improved arrangement and combination of parts which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings, Figure 1 is a perspective front view of my improved combination-lock, showing the same applied to a door-latch of ordinary construction. Fig. 2 is a sectional View of the device taken longitudinally through the central shaft. Figs. 3 and 4 are transverse sectional views taken on the lines '3 3 and 4 4, respectively, in Fig. 2. Fig. 5 is a detail view of the cylindrical shell. Fig. 6 is a detail view of the casing containing the locking-pawl and to which the cylindrical shell is applied. Figs. 7,8, 9, and 10 are detail views of the disks or plates having the inwardly-extending arms by which the locking-pawl is manipulated. Fig. 11 is a detail view showing the pins, by means of which the plates 7, S, and 9 are manipulated. Fig. 12 is a detail view of one of the dummy-pins. Like numerals of reference indicate like parts in all the figures.

My invention may be described as consisting, essentially, of the cylindrical shell connected pivotally with a casing, which is in turn mounted in the casing of the lock to which the device is applied. Said cylindrical shell is provided with a radial arm adapted to bear against a stud or projection upon the bolt or latch, which may thus be thrown by partially rotating the cylindrical case or shell. Thelatter is normally held locked by the action of a series of longitudinally-sliding arms attached to plates or disks; and the invention has for its object to provide mechanism by means of which the said disks may be displaced in regular order, so as to place the device in condition for unlocking.

1 designates the lock-case.

2 is a casing mounted in the latter and containing the locking-pawl 3. The lock-case 1 also contains the spring-actuated bolt orlatch 4, which is provided with a lug or stud 5, adapted to be engaged by an arm 6, which extends radially from the cylindrical shell 11. Said cylindrical shell is closed at both ends and is provided at its front and rear ends with central perforations 12 and 15. The ends of the cylindrical shell are also provided with perforations or bearings 14, of which there are four grouped around the central perforations 12 and 15.

16 designates a disk or plate, to the rear side of which another disk 17 is connected by means of posts, which hold the said disks or plates a short distance apart. The said disks or plates are provided with a series of perforations which are in alignment with each other and of which there may be any desired number, each being marked or designated by a letter of the alphabet or by some other suitable distinguishing character, which is imprinted or engraved upon the face of the front plate 16. The rear plate 17 is also provided with a central perforation 18, from which extends a shaft 19, which is secured to the rear side of the plate 16. The shaft 19 extends through and'has bearings in the perforations 12 and 15 in the cylinder 11.

7, 8, 9, and 10 designate a series of plates or disks, which are mounted upon the shaft 19, which extends rearwardly from the plate 17, said disks being provided with central perforations sufficiently large to accommodate the shaft 19. To retain the said disks in the desired position with relation to each other, I provide each one with a perforation 21, aligning with a pin 22, that extends rearwardly from the plate or disk 17. Each of the disks 7, 8, 9, and 10 is provided with a rearwardly-extending arm 23, the real-most disks 7, 8, and 9 being provided with perforations 24 for the passage of the arms extending from the disks in front. The disks 8, 9, and 10 are additionally provided with perforations 25, aligning with the perforations designated by 26 in the plates 1.6 and 17,

which are distinguished by letters of the alby 27, are dummies, and said pins are provided at their inner ends with heads or en-.

largements 28, which are larger than the perforations 26, and also larger than the perforations in the adjacent plate or disk 10.

It should here be stated thatthe perforations 25 in the plate 9 are to be smaller than those in the adjacent plate 10, while those in the plate 8 are to be smaller still. The plates or disks 7, 8, and 9 may in practice be pressed in a rearward direction by means of the operating-pins, which are designated, respectively, by 29, 30, and 31. The inner ends of said operating-pins are reduced so as to enable them to pass through the perforations in the plates 8, 9, and 10, respectively, and the said pins are provided with shoulders or flanges 32 to enable them to be retained in the perforations in the plates 16 and 17 without danger of pulling out.

33 designates a pin,which extends through suitable perforations in all of the plates 16, 17, 10, 9, 8, and 7, and which also has a hearing in the front end of the cylindrical shell 11. The pin 33 is provided in front of the plate 16 with a head 34, by means of which it may be readily grasped and manipulated to pull in a forward direction the movable plates 7, S, 9, and 10, in rear of which the said pin is provided with an annular flange or shoulder to bear against the rear plate 7.

The edge of the plate 16, which is in practice grasped for the purpose of operating the lock, may be milled, as shown at 36, and a suitable shell or casing may be provided, if thought desirable, to protect this portion of the lock from the weather.

The casing 2, which is in practice mounted in the lock-case 1, as herein described, is composed of the front and rear cheeks or side pieces, which are designated, respectively, 36 and 37, which are connected by means of bolts or posts, whereby they are spaced a suitable distance apart to accommodate between them the pawl or dog The latter is provided with a notch or slot 38, whereby it is mounted upon a pin or stud 39 in such a manner as to be capable of a limited sliding in addition to its pivotal movement. A spring 40 is provided, which bears against the heel end of the pawl, thereby'serving to retain the said pawl in its normal position, with its point resting or bearing against a lug or stud 41. The front side 36 of the lock-case is provided with a circular opening 42, concentric with the stem 19, which is extended through a bearing 43 in the rear side of the casing 2, and is provided in rear of the latter with a nut 44, serving to secure the parts together. At the perimeter of the opening 42 at intervals of ninety degrees are formed notches 45, which are in alignment with and adapted to receive the inner ends of the arms 23, that extend rearwardly from the plates 7, S, 9, and 10. Said arms in fact normally occupy positions in these notches, and thereby lock the combination by preventing the cylindrical shell 11, having the arm 6, to be turned so as to engage and operate the latch 4.

Each of the arms 23, extending from the plates or disks 7, 8, and 9, is peculiarly beveled at its rear or inner end, as will be seen at 46. Each of said arms is also provided near its rear end and in what may be termed its outer side, thereby implying the side which is farthest from the shaft or axle 19, with the notch or recess 47. The arm 23, which extends from the plate 10, is left plain. The dog or pawl 3 in the casing 2 is provided with slots or openings 48 and 49. The outer or rear side of the casing 2 is also provided with a segmental slot 50 and with a perforation 51 to accommodate the points or ends of the arms 23.

Upon the front end of the cylindrical shell 11 or between the arms 23 are placed friction disks 52, of leather, rubber, or other suitable material, the purpose of which is by bearing against the said arms to retain them in any position to which they may be adjusted and to prevent them from being jarred or acci dentally displaced from the position which they are caused to assume by the operation of unlocking the combination.

The manner of operation of my combination-lock-will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed, by those skilled in the art to which it appertains. The combination may readily be set by adjusting the operating- pins 29, 30, and 31 in any of the perforations 26 in the plates 16 and 17 which may be selected. In the remaining perforations 26 the dummy-pins 27 are placed, all of which extend in front of the plate 16 precisely the same distance as the pins 29, 30, and 31, and all of said pins are to all appean ances alike. To unlock the combination, the pin 29, by which the disk 7 is operated, is first pressed in a rearward or inward direction, thus forcing rearwardly the plate 7 and its arm 23, the beveled inner end of which is so arranged as to bear against the inner edge of the dog or pawl 3, forcing the latter slightly in an outward direction from its normal position. It must here be stated that one of the perforations in said pawl is normally in alignment with the arm extending from the disk 8; but the pawl is by the action of the arm extending from the disk 7 displaced to such an extent that the point of the arm 23, extending from the disk 8, shall, when the latter is forced rearwardly, engage the inner edge of said pawl and still further displace the same, so that its inner edge ,will be engaged by .the arm 23,extending from the disk 9, when the latter in turn is forced in a rearward direction. It will thus be seen that I am enabled to force the said plates with the arms successively in a rearward direction until the pawl is displaced and the notches 47 at the outer ends of the arms 23 are 'in alignment with the front plate 36 of the casing 2. The cylindrical shell 11 may then, by grasping the plate or disk 16, be turned, thus causing the radial arm 6 to engage the stud 5 of bolt 4 and unlock the latter. To lock the combination the shell is turned in the opposite direction and the plates 7, 8, and 9 are restored to their normal position by pull ing the pin 23.

It will be seen that in case the operatingpins 29, 30, and 31 are operated in any but their regular order of succession it would be impossible to open the combination, for the reason that the points of the arm 23 would enter the perforations in the pawl 3,, thus positively preventing the shell from being turned. Likewise if one of the dummy-pins should be pressed the several plates 7, 8, 9, and 10 would be simultaneously forced in a rearward direction, and the arm 23, extending from the plate 10, would then pass through the pawl 3 and enter the perforation 51 in the rear plate 37 of the casing 2, thus holding the device securely from being unlocked.

From the foregoing description, taken in connection with the drawings hereto annexed, the operation and advantages of the invention will be readily understood by those skilled in the art to which it appertains.

lhe device is simple in construction and may be manufactn red at a moderate expense. I desire it to be understood thatI reserve the privilege of applying my invention not only to latch-bolts, as illustrated in the drawings hereto annexed, but to any other form of lock to which it may be found applicable. I also reserve the right to make any such changes and modifications in the general structure of the look as may be resorted to without de parting from the spirit of my inventionsuch as, for instance, increasing or decreasing the number of the sliding disks or plates carrying the arms 23 and correspondingly modifying the construction of the other parts of the device.

Having thus described my invention, I claim- 1. In a combination-lock, the combination of a locking-pawl journaled in a suitable casing, a shell connected pivotally with the said casing, a series of plates having arms extending through the said shell and adaptedto engage the locking-pawl, and means for pressing the said plates in regular succession in a rearward direction, substantially as and for the purpose set forth.

2. In a combination-lock, the combination of the lock-case, the spring-actuated bolt or latch having a lug or stud, a locking-pawl mounted in a casing within the lock-case, a cylindrical shell connect-ed with said casing by a longitudinal shaft, the plates or disks having arms extending longitudinally through said shell and having beveled ends adapted to engage the inner edge of the pawl and notches to engage the front side of the casing, a plate or disk having an arm extending longitudinally through the cylindrical shell and adapted to engage perforations in the locking-pawl and in the outer side of the easing, the pins mounted in suitable guide-plates and adapted to successively engage the plates having the inwardly-extending arms provided with beveled points, and the dummy-pins adapted to engage the plate having the in wardly-extending arm adapted to engage perforations in the pawl and in the rear side of the casing, substantially as and for the purpose set forth.

3. In a combination-lock of the class described, the combination of the disks 7,8, and 9, having arms 23, provided with beveled points and notches 47, the disk 10, having arm 23, the cylindricall shell 11, having arm 6, the guide-pin 22, the operating- pins 29, 30, and 31, the pin 33, havinghead 34 and shoulper 35, the center shaft 19, the casing 2, and the pawl 3, mounted in the latter, all arranged and operating substantially as and for the purpose set forth.

'4. In a combination-lock of the class'described, the combination of the cylindrical shell with the disks having the inwardly-er tending arms mounted in said shell, and the friction-blocks attached to the latter between the said arms, substantially as and for the purpose set forth.

5. In a' combination-lock, the disks or plates 7, 8, 9, and 10, having perforations, as herein described, in combination with the operatingpins 29, 30, and 31, having reduced inner ends and provided with annular flanges 32, and the guide- plates 16 and 17, having perforations forming seats for the said operatingpins, substantially as set forth.

6. In a combination-lock of the class herein described, the combination of the guide- plates 16 and 17, having perforations, as described, the operating- pins 29, 30, and 31, having reduced inner ends, the dummy-pins 27, having enlarged heads 28, the disks or plates 10, 9, and 8, having perforations of gradually-decreasing size and provided with inwardly-extending arms 23, having beveled points 4.6 and notches 47, the disk 7, having inwardly-extending arm 23, and the guide-pin 22, extending through perforations in the disks 10, 9, 8, and 7, substantially as and for the purpose set forth.

7. The combination of the casing2, the front side of which is provided with a circular opening having offsets 45 and the rear side of which has a segment-slot 50 and a perforation 51, the pawl 3, having slot 38, where- IIO by it is mounted upon a pin 39, the slots 48 and 49, the spring 40, the stud 41, the pivoted cylindrical shell having disks provided with inwardly-extending arms to engage said pawl, and mechanism for manipulating the said disks in the manner described, and for the purpose set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses. v

SANFORD K. WVEYMOUTH.

'Witnesses:

S. S. VVRIGHT, JOHN MILTON.

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