US818362A - Alarm-latch. - Google Patents

Description

No. 818,362. PATENTED APR.17, 1906. 0. E. 0. EDEY. ALARM LATCH.

APPLICATION FILED FEB. 1, 1904.

4 SHEETS-SHEET l,

(fiz fi W X if I i No. 818,362. PATENTBD APR. 17, 1906. 0. 5.0. EDEY.

ALARM LATCH.

APPLICATION FILED PIS-8.1.1904.

4 SHEETS-SHEET 2.

No. 818,362. PATENTED APB.1'7, 1906. O. B. G. EDEY.

ALARM LATCH.

APPLICATION FILED FEB.1, 1904.

4 SHEETS SHEET 3 No. 818,862. PATENTED APR. 1'7, 1906.

C. E. O. BDEY. ALARM LATCH.

APPLICATION FILED FEB. 1, 1904.

4 SHEETSSHEET 4v attozwm i.

p'nrrnn STATES PATENT oFFion.

ALARM-LATCH Specification of Letters Patent.

Patented April 17', 1906.

Application filed February 1, 1904. Serial No. 191,542.

To aZZ whom it may concern:

Be it known that I, CHARLES E. C. EDEY, a subject of the King of Great Britain, residing at Tacoma, in the county of Pierce and State of Washington, have invented certain new and useful Improvements in Alarm- Latches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in door looks or latches, and has particular relation to latches which maybe made operable from one or both sides of the door, as desired, or may be locked against operation from either side of the door and which are also provided. with a safety alarm mechanism.

The invention consists in certain novel features in the construction and arrangement of parts, as will be hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a partial vertical sectional view of my invention, some portions thereof being shown in elevation, a portion of the door to which the same is attached being shown in section. Fig. 2 is a broken face view of the exterior side of the door to which the mechanism is attached. Fig. 3 is a view, partially in elevation and partially in section, of the lock mechanism, the parts being broken away. Fig. 4 is a sectional view upon the line 4 4 of Fig. 3. Fig. 5 is a detail view showing the alarm-actuating mechanism. Fig. 6 is a detail view illustrating the formation of the connection for the interior end of the knob-shaft. Fig. 7 is a detail view of the interior knob-shaft, partially broken away to show the recesses. Fig. 8 is a detail sectional view showing the rockshaft and the sleeve-shaft surrounding the same, together with the adjacent parts of the mechanism. Fig. 9 is a similar view, but showing the parts with the knobs connected, so as to operate simultaneously. Fig. 10 is a detail view showing the latch-locking device.

The structure of the lock or latch mech anism constituting the present invention is such that it may be made so as to be operable by means of the handles on each side of the door or by means of one handle only, or it may be so adjusted that it cannot be operated from either side of the door. Operating in conjunction with the latch mechanism is a safety alarm mechanism for indicating any unauthorized operation of the latch and attracting attention thereto. In the drawings I have illustrated the lock mechanism as mounted in a door 1, the door being provided with suitable recesses in its edge for accommodating all the parts of the lock and the alarm device.

For the purpose of describing the invention a manually-operated alarm mechanism 2 is shown in proper position to cooperate with the latch mechanism, although other types of alarm mechanism may be employed. The major part of the lock mechanism is carried by a plate 3, secured to the inner side of the door, and a knob 4 is provided upon the same side of the door for operating the latch mechanism. The knob 4, which upon an outside door would be the inner knob, is secured to a shaft 5, the said shaft 5 extending through the lock mechanism a suflicient distance to make it possible to connect the same with a knob 4* upon the outside of the door when desired. of a limited reciprocating movement within the lock mechanism and extends through a sleeve 6, which sleeve has a bearing in central apertures formed in the plates of the lock-housing. The outer end of the sleeve 6 is formed with oppositely-arranged shallow recesses 7 and oppositely-arranged relatively deeper recesses 8, the plane of the deep recesses being at right angles to the plane of the shallow recesses 7. A pin 9, carried by the end of the shaft 5, projects a suflicient distance beyond the periphery of the shaft to .be capable of engaging either the shallow recesses or the deep recesses, according as they are brought opposite one set of recesses or the other. The inner knob 4 is secured to the inner end of the shaft 5, and the pin 9 projects sufficiently beyond the periphery of the knob-stem to engage the said recesses 7 and 8. The pin 9 is normally drawn against the end of the sleeve 6 by means of a spring 12, which surrounds the shaft 5 and bears at one end against the inner end of the sleeve 6, while at its other end it bears against the collar 13, secured to the said shaft. The outer end of the shaft 5 extends into the hollow shank or The said shaft 5 is capable stem of the outer knob 4 and is provided g with a pin extending transversely-through the same and projecting at its ends a sufficient distance to engage oppositely-arranged recesses or notches l1,formed within the said stem. It will be apparent that when the ends of the pin engage the said recesses 11 IIO ' the door.

that the shaft may be turned by rotating the outer knob. If the shaft 5, however, is drawn inwardly a sufficient distance to permit the ends of the pin 10 to escape the notches 11, the outer knob may be rotated in either direction without affecting the shaft,

and therefore without operating the lock mechanism. When it is desired to set the mechanism so that the latch may be operated from each side of the door, the inner knob is operated so as to permit the pin 9 to engage the deep recesses or notches 8 of the sleeve 6. The spring 12 will force the shaft 5 outwardly until the pin 10 carried thereby engages the recesses 11 in the stem of the outer knob. The engagement of the pin 9 with either of the recesses 7 or the recesses 8 is suflicient to make it possible to turn the latch-actuating sleeve 6 by means of the rotation of the shaft 5, so that when the pin 9 engages the deep slots 8 the said sleeve may be positively turned by either handle. When it is desired to render the outer handle inoperative as far as actuating the lock mechanism is concerned, the inner knob is drawn inwardly, pulling the shaft 5 inwardly against the tension of the spring 12, and as soon as the ends of the pin 9 are clear of the recesses 8 the shaft 5 is given a quarter of a turn and the ends of the pin 9 are permitted to be drawn by the spring 12 into the shallow recesses 7. The recesses 7 are sufficiently shallow to prevent the shaft from extending far enough into the hollow stem of the outer knob to bring the ends of the pin 10 into engagement with the recesses 11. The outer knob is thus left free to rotate with respect to shaft 5.

The latch mechanism is provided with a re ciprocating locking member 15, which projects through openings formed in the housing of the mechanism and through the portion of the plate 3 which is turned over the edge of The inner portion of the reciproeating latch 15 is provided with an elongated opening surrounding the inner end of the col lar 6. A spring 16, secured to the inner wall of the latch-housing, bears with its free end against the inner rounded end of the reciprocating latch, tending to force it normally into its outermost position. The latch 15 is made reversible-that is to say, both sides of the latch with the exception of its outer end are made alike, so that the beveled outer end may be turned in either direction, according to the direction in which the door is to swing and it is thus made effective for use on any door. Projecting from each edge of the latch are arms 17, which coiiperate with the actuating-arm of a key lock-stop 19. The lockstop 19 is operable by means of a key inserted through an opening 20. The key engages the barrel of the lock-operating stop 19, the

said stop projecting laterally therefrom, as clearly shown in Fig. 3. The arm 17 on one edge of the latch is preferably arranged adj acent at one face thereof, as shown in Fig. 4, while the other arm 17 upon the opposite edge of the latch is arranged near the other face of said latch, so that either arm will be engaged by the stop 19 no matter What the position of the latch 15. The use of the key lock-stop 19 makes it possible to open the door from the outside by means of a properly authorized key when the outer knob is dis connected from the operating mechanism. The opposite faces of the latch are provided with depressions or recesses 21, which accommodate the actuating-cam ends 22, which project from the sleeve 6. The said cams 22 when moved by the operation of the doorknobs press against the ends of the recesses 21, forcing the latch inwardly against the ac tion of the spring 16. The recesses 21. on each side of the latch are made exactly alike, so as to not interfere with the reversible feature of the latch. It will be evident that the location of the recesses 21 with respect to the actuating-arms 22 is such that the sleeve 6 may only have a limited rotation within the locking mechanism. This, however, is sufiicient for the purpose of retracting the latch 15 until it is disengaged from the j amb-plate of the door when it is desired to open the said door. For smoothly and properly guiding the inner ends of the latch the said latch is provided at its inner end and upon opposite sides with slots 23, which engage a guidingrib 24, mounted within the latch-housing. In this simple manner any binding of the parts within the latch mechanism is obviated and the latch is prevented from being twisted from its normal and proper position. The notches are formed upon both sides of the latch in order to accommodate the reversal thereof. Upon the opposite faces of the latch at a point near the opening through which the latch passes out of the latch-housing are formed shoulders 25, which shoulders project rearwardly from the end portion of the latch. One of the shoulders will always project through an aperture formed in the inner face-plate of the door, so that it may be engaged by the shouldered end 26 of a pivot ed bar 27. The bar 27 is pivoted upon the central portion of the sleeve 6, a collar on said sleeve holding the arm in place. The bar 27 is thus loosely mounted on the sleeve 6 and may be permitted to fall into a vertical position, as shown in Figs. 8 and 9, so that the shoulder 26 carried thereby will not look the latch 15 against movement, or the said arm may be turned upwardly to a horizontal position so as to'extend longitudinally of the latch 15, as shown in Fig. 10, so as to oppose the shoulder 26 to the projection or shoulder 25 and prevent the inward movement of the said latch. A finger-engaging extension 28 projects from the shoulder 26, whereby the pivoted bar 27 may be shifted into and out of the path of the shoulder 25 upon the latch.

When the bar 27 is moved opposite the shoul-" which is guided in its movement upon the plate 32 of the lock-housing by means of pins engaging an elongated slot 34, formed in the said slide 31. The end 30 of the slide which bears against the cam 29 is turned at right angles to the body portion of the slide, as clearly shown in Fig. 5. The said end 30 is normally forced against the cam 29 by means of a spring 41, which is interposed between it and the projecting end of one of the slot-engaging pins 33.

nected withit an actuating-slide 36.

which rides upon the shank of the screw 38,

which connects the inner and outer plates of 1 the lock mechanism. Projecting from the:

end of the slide 36 is a shoulder or extension 39, which engages the push-rod 40 of thealarm-bell mechanism 2. A complete rotation of the cam 29, caused by turning the outer knob, will force the slide 31 upwardly, as well as the slide 36 and the shoulder or projection 39, setting the alarm mechanism in operation and calling attention to the fact that some unauthorized attempt at operating the latch mechanism is being made. The shaft of the cam 29 is such that a quarter of a turn of the outer door-knob willaifect the operation of the alarm mechanism. The arrangement of the notches or recesses 11 in the outer knob is such that the alarm mechanism cannot be actuated by the cam 29 when the knob is connected with the inner knob and in position for actuating the latchshaft 5 and retracting the latch 15. This results from the fact that the cams 22 are limited in their movement by the extent to which the latch can be moved, and this is not sufiicient to permit the cam 29 to be rotated enough to operate the alarm.

The construction of the alarm-bell 2 (indicated in the drawings) forms no part of the present invention and does not, therefore, need particular description at this point. It may be preferable at times to employ an electrical alarm mechanism in place of the mechanical alarm, (shown at 2'in the drawings.) In such a case an electrically-operated bell or signal device is substituted therefor, and a battery 43 for said plate may be located at any convenient point, with the terminal 14: extending to the spring-plate 45 and the other The outer end of the slide 31 is also bent at right angles and has con- The slide 36 is provided with an elongated slot 37,

terminal connected to the member or plate 35. The circuit through the parts is completed by wires 46 and 48. The operation of the electrical device is substantially the same as the operation of the mechanical device, with the exception that the slide 36 and the projection 39 may be omitted.

From the above description it will be evident that when the parts occupy the position shown in Figs. 1 and 8 the outer knob 4 may be rotated in either direction and may be given a complete rotation without retracting the latch 15, because of the fact that the pin 10 does not engage the recesses 11. When the knob 4" is thus capable of rotation, it will carry the cam 29 around with it sufficiently to press against the projection 30 of the alarm mechanism and operate the same, giving an audible signal.

When it is desired to use the latch mechanism as a day-latch, the knob 4 is drawn inwardly sufficiently to release the pin 9 from its engagement with the shallow recesses 7 and given a quarter of a turn, so that the said pin 9 may enter the recesses 8, as shown in Fig. 9. The action of the spring 12 will then cause the reciprocation of the shaft 5 sufficiently to bring the pin 10 into engagement with the recesses 11 in the shank of the outer knob 4 The outer knob is thus looked upon the shaft 5, and the said shaft may be turned by the actuation of either of said knobs.

It is convenient and desirable at times to lock the latch 15, so as to prevent its operation by the use of the ordinary key or by the operation of either knob, in which event the pivoted piece or bar 27 is swung into the position indicated in dotted lines in Fig. 3, the shouldered portion 26 thereof being brought 0 posite the shoulder 25upon the latch, and t us preventing the inward movement of the said latch.

It will be evident that the minor details of construction of the mechanism above described may be altered without departing from the spirit of the invention.

Having now describedmy invention, What I claim as new, and desire to secure by Letters Patent, is

1. An alarm-latch mechanism, comprising a rock-shaft, a revoluble hollow latch, actuating sleeve-shaft coperating therewith. a cam capable of being connected to and disconnected from said rock-shaft and an alarm operable by said cam when it is disconnected from said rock-shaft.

2. An alarm-latch mechanism having a erable by the actuation of the cam when the movable knob is disconnected from the said revoluble shaft.

3. A latch mechanism provided with a rock-shaft, a cam mounted in said latch mechanism, means for moving the shaft longitudinally and thereby connecting it with the cam, and an alarm mechanism operable by the action of the cam.

4. An alarm-latch mechanism comprising a plurality of rotatable knob-shafts, one of which shafts is fixed against longitudinal movement while the other is capable of longitudinal movement, a cam on the fixed knob-shaft, and an alarm-actuating mechanism operable thereby.

5. An alarm mechanism comprising a plurality of revoluble knob-shafts, an intermediate shaft rigidly connected with one knobshaft and capable of being connected or disconnected from the other knob-shaft, a cam carried by the said latter knob-shaft and an alarm mechanism capable of actuation by the movement of the cam when the knob which carries the same is disconnected from the said-intermediate shaft, the connection of the knob carrying said cam, with the intermediate shaft operating to prevent the actuation of the alarm mechanism.

6. An alarm-latch mechanism having a rockable shaft, a sleeve surrounding the same, a cam adjacent to one end of said sleeve, means capable of operation for connecting or disconnecting the sleeve, a knob for turning the cam with the said knob and cam, and an alarm mechanism operable by the cam.

7. An alarm-latch mechanism comprising a rock-shaft, a knob-shaft capable of movably receiving one end of the rockshaft, a cam carried by the knob-shaft, the said cam being operable by the shaft or by the rockshaft'when connected with the knob-shaft, means operable for connecting or disconnecting the knob-shaft with the rock-shaft, and an alarm mechanism operable by the said cam upon the disengagement of the knob-shaft from the rock-shaft.

8. An alarm-latch comprising a rock-shaft, a rotatable knob-shaft, a cam carried thereby, an alarm mechanism operable by the cam, a latch. operable by either the said rockshaft or the knob-shaft, and an abutment member upon said latch and a member carried by the rock-shaft adapted to be projected into the path of said abutment member.

9. An alarm-latch mechanism comprising a plurality of knob-shafts, both of which are capable of a rocking movement while one of them is capable of rotation, means operable for connecting or disconnecting the shafts, a latch operable by either of said shafts when locked together, a cam upon one of said knobshafts, and an alarm operable by said cam.

10. An alarm mechanism having a non-reciprocable shaft, a cam carried thereby, a reciprocating shaft adapted to engage the nonreciprocable one, means for moving the reciprocating shaft in position to hold the rotating shaft, a latch operable by either shaft when they are connected, and an alarm mechanism operable by the cam when the shafts occupy a disengaged position.

11. An alarm-latch provided with a rockshaft, and a rotatable shaft, means for rocking said shaft, a cam on the rotatable shaft, s ring-actuated sliding members operable by the cam, and an alarm mechanism actuated by the sliding members.

12. An alarm-latch mechanism comprising a reversible latch formed with a beveled projection portion, an integral shoulder formed thereon, a movable stop cooperating therewith, the said latch having a guide-groove formed thereon, and a guiding-rib engaging the said groove for directing the reciprocating movement of the latch.

13. An alarm-latch mechanism comprising a casing, a latch-actuating sleeve mounted therein, a reciprocating rock-shaft having a bearing in the sleeve, an alarm actuating cam mounted adjacent to the said sleeve, and means for connecting the reciprocating rockshaft with the said cam, the sleeve being capable of controlling the engagement of the rock-shaft with the said cam.

14. An alarm-latch mechanism comprising a housing, a sleeve mounted therein, a reciprocating rock-shaft extending through the sleeve, the said sleeve having recesses of different depths formed in one end thereof, a cam for actuating an alarm, and a spring tending normally to force the rock-shaft into engagement with the cam, the recesses of the sleeve affording means for permitting or preventing the engagement of the rock shaft with the said cam.

15. A lock mechanism comprising a reciprocating latch, a rocking sleeve for actuating the same, a reciprocating shaft extending through the said sleeve having actuatingpins in the ends thereof, a knob or handle secured to one end of said shaft, an alarm-actuating handle movably engaging the other end of said shaft, the pin at that end of said shaft being capable of connecting the shaft with the alarm-actuating handle, a spring tending to force the pin into engagement with the said handle, and means carried by the latchactuating sleeve for preventing or permitting of the said engagement.

16. A latch mechanism comprising a housing, a latch-actuating sleeve mounted therein and having shallow and deep notches formed in its edge, a reciprocating shaft extending through the sleeve and having a pin secured thereto capable of engaging either the shallow or the deep notches, a spring interposed between a collar on the shaft and the sleeve, tending to draw the pin into engagement with the notched end of the sleeve, an outer handle ca able of movement with respect to the sha t, means carried by the shaft for connecting it with the outer handle when the in is in engagement with the deep notches 0 the sleeve, the said shaft not being connected with the outer handle when the pin is in the shallow notches and an alarm mechanism operable by the said outer handle when it is movable on the shaft.

17. A latch mechanism comprising a reciprocating latch, an actuating sleeve for moving the same, and an outer and inner knob, a reciprocating shaft secured to one of said knobs and extending through the sleeve, the said shaft being capable of a reciprocating movement, an alarm mechanism and means for holding the shaft out of engagement with one of said knobs for rendering the said knob incapable of operating the latch 20 mechanism but capable of operating the alarm mechanism.

18. An alarm-latch mechanism comprising a reciprocating latch, a sleeve for o erating the same, cams projecting from the sleeve for retracting the latch, arms projecting from the edges of the latch, a lock-stop member engaging one of said arms, the said member being capable of operation by a key, an alarm device and means latch-operating mechanism inoperatlve.

In testimony whereof I hereunto affiX my signature in presence of two witnesses.

CHARLES E. C. EDEY.

Witnesses:

ALFRED S. EDEY, FRANK J. MILLER.

for rendering the 0.

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