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Publication numberUS428711 A
Publication typeGrant
Publication dateMay 27, 1890
Filing dateMay 2, 1889
Publication numberUS 428711 A, US 428711A, US-A-428711, US428711 A, US428711A
InventorsJohn C. Bare
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 428711 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

3 R R A B .L


No. 428,711. Patented May 27, 1890.

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No. 428,711. Patented May 27, 1890.



(No Model.) 3 Sheets-Sheet 3. J. C. BARR. INDICATOR LOCK.

No. 428,711. Patented Mey Z7, 1890.

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SPECIFICATION forming part of Lettersratent No. 428,711, dated May 27, 1890- Application filed May 2, 1889. Serial Ne. 308,959. (No model.)

T0 all whom it may concern.-

Be it known that I, JOHN O. BARR, of St. Paul, in the county of Ramsey, State of Minnesota, have invented certain new Improvements in Locks, of which the following is a specification.

This invention relates, generally, to improvements in locks, and more especially to that class of locks which is provided with devices for indicating that they have been unauthorizedly opened.

The invention consists, generally, in the construction and combination hereinafter described, and particularly pointed out in the claims.

The objects of the invention are, first, to provide a padlock with an improved shackle which cannot be tilted backward until after a sliding bolt to which itis secured is released, permitting the pivoted end of the shackle to be drawn out and released from a socket in which it is held when the shackle is fastened; second, to provide an improved locking mechanism for fastening the shackle, and, third, to construct apadlock that willbe water-proof, thus permitting it to be used in exposed places with full protection to the mechanism of the lock.

In the accompanying' drawings, forming part of this specicatioInFigure-l represents a front or face view of Iny improved lock. Fig. 2 is a perspective view of the key. FIg. 3 is a face view with the face-plate and the indicating-disks removed. Fig. 4 is a side elevation and section on line a; of Fig. 3, with a portion of the lockecasin g removed to show the indicating mechanism. Fig. 5 is a front view with the front plate and indicating mechanism removed. Fig. 6 is a similar view, with the key inserted in the lock and the shackle unfastened and raised. Fig. 7 is a central vertical section on line x :r of Fig. 4t. Fig. 8 is a vertical section on line fz/ y of 'Fig'. 5. Fig. 9 is a detail of vthe indicating mechanism. Fig. 10 is a bottom view of the lock casing, showing the key-hole. Fig. 11 is atop view of the loclecasing with the shackle removed and showing the sockets which receive the ends of the shackle.

In the drawings, 1 represents the lock-casing, which may be of any desired shape and construction, and is provided in its face-plate 4t with two slots or openings 3, that are preferably covered with glass, mica, or other transparent material 5. The shackle 2 is of substantially the usual form, and is provided at its free end with a reduced portion or tenon (i, which fits into the socket 7 in the lock-casing. This socket is preferably of suitable size to form a close iit with the free end of the shackle, and the socket preferably does not communicate with the interior of the lockcasing. The other end of the shackle is provided with a tenen 8,which fits into a socket 9 in the lock-casing. This socket communi cates with the interior of the casing. The upper end of this socket preferably iiares out ward, and the shackle is provided with a collar 10, which makes a water-tight tit with the end of the socket, whereby when the shackle is fastened water is precluded from entering the socket. The tenon S is pivotally secured to the sh ackle-bolt ll-fthat is, arranged within the interior of the lock-casing. This bolt is adapted to slide upward into the socket El, being guided by a pin 12,which passes through a slot 13 in the bolt. Vhen the bolt is in its elevated position, the pivotal point between the shackle and the bolt 11 is above the top of the socket 9, and the shackle may be tilted backward and its free end carried out of the socket 7. When the shackle-bolt is carried downward into the casing and the pivotal ypoint between the bolt and shackle is brought inside of the socket 9, the shackle cannot be turned upon its pivot. The bolt 11 is provided with a beveled notch 15, and a sliding bolt 14, having a beveled end, is arranged within the lock-easing and is adapted to engage said beveled notch 15 and fasten the shackle bolt 11 with the ends of the shackle'in engagement with the sockets 7 and 9. A spring 1G engages the bolt 14 and tends to hold it at all times in engagement with the shackle-boltll. The rear end of the bolt 14 is provided With a projection 17, extending at right angles to the main portion of the bolt. A cam 18 is mounted upon a pivot 19, and is arranged t-o engage the projecting portion 17 of the bolt 14. Vhen the short-er radius of the cam 1S is against the projection 17, the

rbolt 14 may engage the notch in the block 11.

By turning the cam 1S upon its axis and bringing its ion ger radius against the projec- IOO tion. 17 the bolt will he moved back against the tension ol the spring le and withdraws from the notch l5.

I prefer to employ a key 20, of substantially the form shown in Fig. 2. This key consists, preferably, ot a strip ol' angle-iron or other metal havin g a series ot' notches formed 1n one edge thereof. A key-hole 2l, of substantially the form ot the cross-section of the key, is arranged preferably in the lower part of the lock-casing. A pivoted stop 23 is arranged within the easing and closes the keyhole when the key is removed. A spring 25 1s connected with this stop and holds it normallyin position to close the key-hole. A dogr is secu red to or formed integrally with the stop 23. This dog comes under the cam 1S when the cam is in its normal position, as shown in Fig. '7, and forms a stop therefor and prevents turning the cam upon its axis unt-il the dog` 2T has been moved out ot` the path of the cam, which is done by the insertion et" the key. A plate 2S is secured to or formed integrally with the cam 1S, and it has a curved edge, which is made in the are of a circle of which the pivot 19 is the center. This plate is provided upon its edge with a series of notches, which are preferablyot various sizes, thus forming upon the edge of the plate a series of teeth of various widths, but all of the same length. The key is likewise provided with a series of notches of various widths, which correspond with the teeth upon the edge of the plate. The plate thus forms a segmental gear and the key a rack-bar, which engages therewith. As the key is inserted, it irst strikes thepivoted stop 23, pushing it away from the key-hole and moving the dog 2T from under the cam IS. As the key is advanced, the teeth thereon engage the notched plate, turning it upon its axis, and thereby turning the cam 1S and retracting the bolt 14. Yhen the plate has been turned, so that the last tooth upon the plate engages the last notch upon the key, the bolt li will be withdrawn from engagement with the notch l5. The shackle-bolt ll andthe shackle may then be drawn out into the position shown in Fig. (3, and the shackle may then be turned back upon its pivot and the lock removed. lYhen the key is drawn out of the lock, the segmental wheel will return to its former position, returning the cam to its former position, and the spring may then throw the bolt It into engagement with the notch in the shackle-bolt as soon as the shackle-bolt is returned to position to bring the notch opposite the end of the locking-bolt. lYhen the key is withdrawn, the dog 27 and the keyhole stop 23 are returned to position by means of the spring 25, In order to guide the key as it is inserted into the lock, l provide a guide-plate 34, which extends 'from the keyhole across the interior ot the lock-casing. This guide-plate is of angular shape in crosssection, so that the outer angle ot the keytlts against the plate. The distance from the pivot ot the segmental gear to the guide-plate 34- is equal to the radius of the segmental gear, so that as this gear is turned upon its axis the ends ot' the teeth come close to the guide-plate. This renders it impossible to turn the gear, except by the use ol' a key ot' the kind described having' notches corresponding to the teeth upon the segmental gear.

The only openings to the interior of the lock-casing are the socket 9 and thekey-hole l. The socket 9, as 'before stated. is closed by the collar lO, which makes a water-tight joint with the end of the socket. The keyhole is also completely closed by the stop It will thus be seen that the lock-casing is completely water-proof and theinclosed meehanism is fully protected.

I prefer to provide an indicatingmechanism in connection with this lock, and this meehanism is preferably composed of a series of indicating-disks 30, as shown in Fig. i). The operating-pawl 3l of the indicating mechanism is secured upon the sliding shackle-bolt ll, preferably by means of a pin 32 and plate 353, so that at each movement ol the shacklebolt the indicating mechanism is Operated and the combination ot' figures and letters is changed each time the lock is untastened, and it will be impossible to know what combination will be shown until thelock is unfastened and the shackle withdrawn.

It will be understood that by changing the size and arrangement of the teeth upon the key and upon the segmental gear-wheel a large number of combinations can be made, and it will be necessary to use the key having the corresponding arrangement ot teeth to operate any one of the lot.

The key may be made ot any desired width and height and the angles may extend in any direction, either toward the t'ront or the back of the lock or toward either side, and the notches upon the key may be made upon either edge thereol'.

I claim as my invention* l. In a lock, the combination, with a locking-bolt and a cam engaging therewith, ot a gear connected with said cam, and a sliding key provided with a series of teeth corresponding' to the teeth upon said gear.

In a lock, mechanism for operating a bolt comprising in combination a gear provided upon its edge with a series ot irregularlyspaced teeth ot' various widths, and a sliding key provided with a corresponding series of teeth adapted to engage the teeth upon said gear, whereby as the key is inserted into the lock with the sliding motion said gear is turned upon its axis.

3. In a lock, the combination, with a sliding' bolt, of a gear having a cam connected with said bolt and provided with a series of teeth, a guide-plate forming the back et the keyway, and a sliding' key provided with a corresponding serics of teeth arranged to engage the teeth upon said gear, whereby as said key is inserted into the lock with a sliding' motion IOO ITO

said gear is turned upon its axis and said bolt is moved.

et. In a lock, the combination, with a sliding bolt, of a pivoted cam engaging therewith and adapted as it is turned upon its axis to move said bolt, a gear connecting with 'said cam, a pivoted dog forming a stop for said cam, and a sliding key provided With a series of teeth adapted to engage the teeth upon said gear, whereby as said key is inserted into the lock said dog is first moved out ot" the path of said caln and said gear is then turned upon its axis, substantially as described.

5. In a lock, the combination, With a sliding shackle-bolt and a shackle pivoted to said bolt, of a locking-bolt arranged to engage and lock said shackle-bolt, a gear provided With a suitable cam arranged to engage said lockingbolt, and a sliding key provided with a series of teeth corresponding With the teeth upon said gear, substantially as described. l

6. In a lock, the combination of the easing provided with the socket or opening` 9, the shackle-bolt ll, arranged within said casing, the shackle pivoted to said bolt at a point which is Within said socket when the lock is fastened and outside of said socket when the lock is unfastened, the locking-bolt arranged to engage said sliding bolt ll, a gear provided with a suitable cam arranged to move said sliding bolt as the gear is turned upon its axis, a guide-plate forlnin g the back of the key- Way, and a sliding gear provided with a series ot teeth corresponding With the teeth upon said gear, substantially as described.

7. In a lock, the combination, with a suitable casing provided with a circular opening or socket 9, having a beveled mouth or end, of the shackle-bolt 1l, arranged within said casing, having a 4slot 13, engaging a stop-pin 12, and the shackle 2, pivoted to said bolt and having a collar l0, adapted to make a tight lit with the bevel of said socket, substantially as described.

8. In a lock, the combination, With a locking-bolt and a cam arranged to engage said bolt, of a gear connected with said cani, a guide-plate arranged Within said casing at a distance from the center of said gear equal to the radius of said gear, and a sliding key u provided with a series of teeth corresponding with the teeth upon said gear. y

9. In a lock, the combination, with a casing provided with an opening or socket in its Wall, of a shackle, a shackle-bolt having a pivotal connection with said shackle and adapted to be moved so as to bring said pivotal connection outside of said casing or Within said socket, an indicating mechanism connected with said shackle-bolt, a locking-bolt adapted to engage said shackle-bolt, and a cam engaging said locking-bolt, substantially as described.

In testimony whereof I have hereunto set my hand this 15th day of April, 1889.

JOHN C. BARR. In presence of T. D. MERWIN, ARTHUR P. LoTHRoP.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7661278 *Oct 16, 2008Feb 16, 2010Yao-Kun YangLock assembly capable of counting the number of times of unlocking operation
US8201423Sep 17, 2010Jun 19, 2012The Eastern CompanyCombination and key operated locks with indicators
US8881558Jun 8, 2012Nov 11, 2014The Eastern CompanyCombination and key operated locks with indicators
US20090320539 *Oct 17, 2008Dec 31, 2009Yao-Kun YangLock assembly capable of recording the number of times of unlocking operation
USD674266Jun 8, 2012Jan 15, 2013The Eastern CompanyCable shackle padlock having a sidewall aperture for a status indicator
Cooperative ClassificationE05B39/04