US1373301A - Lock - Google Patents

Description

I. CANNON, In.

LOCK.

APPLICATION FILED FEB. 4. 1919.

Patented Mar. 29, 1921.

3 SHEETS-SHEEI l.

T. CANNON, IR.

LOCK.

APPLICATION FILED FEB. 4, I9I9.

Patented. Maf. 29, 1921..

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T. CANNON, JR.

LOCK.

APPLICATION FILED F5354, 1919.

1,373,301 Eatented Mar. y29, 192l.

Suva/whoa N mm-Jil unirse stares THOMAS CANNON, JR., OF WEST DURHAM, NORTH CAROLINA.

LOCK.

Application filed February 4, 1919.

To all fai/wm it may concern.'

Be it known that l, THOMAS CANNON, Jr., a citizen of the United States of America, residing at West Durham, in the county or Durham and State of North Carolina, have invented new and useful Improvements in Locks, of which the following is a specification.

rlhe purpose of the invention is to provide a new and novel form of mortise lock. The lock is constructed with a relatively wide but thin casing which carries a spring operated latch for engagement with the usual form of keeper. The casing is designed to be set in a door with which the lock is used and the latch is operable from either side or" the door, may be locked from either side so that it not be unlocked from the opposits side, and may be made to operate a doorbell or other alarm each time it is unlocked. In connection with the alarm, provision is made for having theV same operate only at the time of operating the latch or for operating the alarm continuously after the latch has been operated.

Other and further purposes of the invention reside vin the details of construction and are made to appear as the following description progresses.

To the eXact construction in which it is shown and described, the invention is not to be restricted. The right is claimed to make such changes or alterations as the actual reduction to practice may suggest, provided the changes or alterations are compatible with the scope of the annexed claims.

The same numerals of reference designate the same parts throughout the several {ig-V ures of the drawings, wherein:

Figure l is a view partly in section, showing the improved lock in plan and its manner of use in connection with a swinging door. Y i

Fig. 2 is an edge elevation of a portion o the door shown in Fig. 1. This figure shows the improved lock in edge elevation.

Fig. 3 is a View fin side elevation looking` at that side of the lock on which `the alarm mechanism is carried.

Fig. 4 is a plan view of the internal mech anism of the lock, the top of the casing being removed therefrom.

Fig. 5 is a section on the line 5 5 of Fig. 4, this section showing the stem for operating the locking pawl and the tubular shank for operating the latch.

Specification of Letters Patent.

Patented ltlar. 29, i921.

serial No. 274,987.

Fig. 6 is a section on the line 6 6 of Fig. et, showing the operating' lever for the latch.

Fig. 7 is a section on the line 7--7 of Fig. l, an intermediate transverse sectional view through the whole lock structure.

Fig. 8 is a perspective view of one of the handles carrying one of the elements of the alarm operating device.

Fig. 9 is a perspective view showing the element cooperating with that carried by the handle in Fig. 8.

Fig. l0 is a perspective view of an exteni sion used in conjunction with the latch shank so that the latter may be increased in length to -permit the attachment of the lock to doors of greater thickness than the ordi nary.

Fig. 11 is a perspective view of the key for locking or unlocking the improved lock.

Figs. 12 and 13 are detail perspective views respectively of dierent forms ot' latch members.

Fig. 14 is a detail perspective view of the stem for engagement by the key to effect the operation of the device.

The invention is shown applied to the door A., the jamb B of which carries the striking plate or keeper 1 with which the latch 2 engages to retain the door in closed position.

The latch 2 is carried in the casing 3 comprising two sections suitably secured together by the screws il. The door A is mor tised to receive this casing 3 and on the inside carries a plate 5 to which there is attached a handle 6. The plate 5 carries on its inner face a lateral extension 7 formed with a longitudinal slot 8 through which there is passed a screw 9 entering the casing 3. VThe casing is thus secured to the plate 5 and the longitudinal slot 8' provides for the adjustment of the plate 5 relative -to the casing, so that when the casingis placed. in doors of various thicknesses, the plate 5 may he adjusted relative to the casing to permit the plate 5 to lie snugly against the side of the door.

On the outside oi' the door there is carried a plate 10 similar to plate 8, this plate having a handle il vbut being provided with two lateral projections l2 which are likewise Y formed with longitudinal slots 13 through which pass the screws 14 to secure the'plate 10 to the casing. These two lateral projections 12-are disposed vone on either side of the projection 7. Thus the two plates may be adjusted toward and away from each other, always leaving the casing 3 disposed intermediate between them.

01 course the door is provided with slots on `opposite sides, which slots communicate with the mortise in which the casing 3 sets, these slots providing space for the projections 7 and 12 to enter to attach to the casing.

The latch 2 is of the conformation of a bell-crank lever, being` pivotally mounted on the stud 15 set in one oit the sections of the casing 3. A nut 16 attaches to this stud and serves to retain the latch thereon. i spring 17 tensioned between appropriate pins, one by the latch and the other by one section of the casing l, serves to normally but yieldingly hold the latch projecting from the casing so that it may engage the keeper 1 when the door is closed. ik stud 18 carried by one section ot the casing retains in position for oscillating movement thereon the lever 19 to one end ot which there is pivotally connected a link 2O whose other end is pivotally attached to that end of the latch remote from that which engages the keeper. The lever 19 is pivoted at a point central both with respectto its length and width and at each end there is pivotally attached to this lever a hollow shank 21 both oi? which project in opposite directions through the sides of the casing 3, through the sides of the door and through the plates 5 and 1()7 that shank projecting through the plate 5 detachably receiving a knurled head or handle 22' and that projecting through the plate 10 receiving a similar handle 23. It is obvious that pressing either one of these handles toward its respective plate will rock the lever 19 which will, by means of the connecting link 20, rock the latch so that that end which engaees the keeper 1 will be moved into the casing against the tension of the spring 17. As soon as pressure is removed from the handles, however, the spring- 17 will return the latch to its looking positionand it is apparent that it the door be swung` to, the striking plate will engage the projecting end ot the latch and torce the latter inward until it may engageV in' the keeper.

Provision is made for locking the lever 19 against rocking movement and to this end the said lever on opposite edges and on opposite sides ot the stud 18 is recessed as shown. at 24. so that projections 25.1nay be provided. For engagement with one of these projections 25 there is provided a pawl 26 pivotally mounted on the stud 27 and the hook nose of this pawl may engage the adjacent projection 25 when the 'lever 19 is in its normal position-that is when the latch 2 is in engagementwith the keeper. Bearing upon the pawl 26 there is a iiat spring 28 and, that edge of the pawl opposite the hook nose being provided with two flat portions as shown, the spring may bear against either one or the other oi' these iat portions to hold the nose in engagement with the projection 25 or to hold the pawl in such a position that it may be precluded from engagement with the said projection. rl`he pawl 26 is formed with anarm 29 on the opposite side of the stud 27 from the hook nose and at the end of this arm there is pivotally connected one end ot a stem 30, this stem slidably entering the hollow shank 2l pivoted to that end` of the lever 19 to which the shank 2O is'connected. .Adjacent the free end of this stem 30 there is formed a transverse recess 31, the stem being cut away as indicated at 32 to provide a longitudinal recess extending from the -tree end ot the stem to the recess 31. This recessing of the stem 30 is :tor the purpose of permitting the pawl 26 to be thrown into or out of engagement with the lever 19 by means ot the key 33. This key is formed with a long straight round shank, as shown, from the tree end ot' which there projectsan eXtension 34, this extension being substantially round in cross-section and offset from the center ot the 'shank et the key. This eXtension 34 terminates at its free end in an enlargement 35 Vthe nose ot which may slide in the recessV 32 whenthe shank ofthe key is inserted in the hollow shank 37. Then the key-shank has been inserted a sufficient length, this enlargement 35 is designed to engage in the recess 31 by a slight angular movement imparted to the key shank. Thus the key becomes hooked to the stem 26 and the latter may be moved longitudinally in either direction through the hollow shank 21 to shift` the pawl 26 into or out of engagement with the lever 19 as aforesaid.

ln addition to the pawl there is also i'novided a pawl `36, likewise provided with a. hook nose 'for cooperation with the other projection and the lever 19. This pawl 36 is pivotally mounted on the stud 37 and a iiat spring mounted in the casing and bearing upon thepawl serves to keep it in positions oit engagement or disengagement with the lever 19'. A stem 39 has its one end pivotally connected with this pawl 36 at the end remote from the hook nose and this stein slidinpjly enters the hollow shank 21 opposite that which the'` stein BO enters. This stein 39 is likewise provided with transverse and longitudinal recesses indentical with Ythose formed from the stern 30, so that the key 33 may be engaged with this stem tooperate the pawl 36 in the same'way the pawl 26. i

Provision is made, for attaching the lock to doors of various thicknesses by the adlinstment ott-he plates 5 and 10 relative to thev casing. VTherefore it is essential that some means be providedA for vadjusting the that it operates length of the hollow shank 2l and this means is comprised in the hollouT extensible members 40 (one of which is lshown in Fig. 10) which, when the handles 22 and 23 are removed from the shank 21, may be screwed on to the Shanks and the said handles atis not insulated from the plate 5 and therefore the wire 42 has electrical connection with the latter.

Carried upon the handle 22 there is a lever 48 pivotally attached to the handle yat an intermediate point, so that it may be turned on the pivot but not freely thereon, thus assuring' this lever maintaining any position at which it isset on the handle. he lever 48 is formed at one end with a hooked extension which, when the le 7er is set in a certain position and the handle 22 pressed toward the annular portion 47 of the plate 46, will hook under the said annular portion, the latter springinp aside to permit this hooking engagement. lNhen the lever 48 is so set, however, that this hooked portion may not engage, as aforesaid, the said part of the lever will contact with the annular portion when the handle 42 is pressed toward the plate 46. lt is intended that normal position of the lever 46 shall be such that the hooked end 49 will'not engage the annular portion 47. Therefore when the door is opened by pressing either one of the handles 22 or 23 toward their respective plate, the lever 4G will contact with the annular portion 47 and establish a circuit on the bell 43, thus putting the same in operation and indicating the fact that the lock has been opened. lf it is desired to make this alarm continuous, however, the lever 48 should be so positioned that the hooked end 49 will engage the annular portion 47 on the depression of either of the handles 22 or 23, and this engagement having been once effected, the circuit will remain established until the lever 48 is shifted so that it may disengaefe the annular portion 47.

The lock is. of course. intended for attachment to a door so that the handle 22 will be on the inside thereof, thus making it impossible for anybody on the outside to manipulate the mechanism b v which the alarm is operated and, it is obvious that this alarm may be made the door bell, the necessary connection being taken from the ordinarv push button. It has been shown how the key is used to operate the two locking paxvls attendant on the lever operating the latch and since these two pawls are independent one of the other, it is obvious that the door, having, once been locked may not be unlocked except from that side on which it was locked.

The invention has been illustrated and described as applied to a. swinging door, but it is obvious that it may be made to work with equal effectiveness on a sliding door, the only change made necessary by the latter applic-ation being` to so construct the latching member that it moves in a plane at right angles to the plane of movement of the latching` member, as shown.

The invention having been. described, what is claimed as new and useful is:

l. In a lock, a casing, a bellfcrank latch member pivotally mounted in the casing, a spring` tensioned between said latch member and a point on the casing to cause the latch member to project normally7 from the casing', a lever pivotally mounted in the casing at an intermediate point in its length, a link connectingone end of said lever with one end of said latch member, shanks connected with the lever at opposite ends thereof and projecting slidably through opposite sides of the casing, handles attached to the projecting ends of said shanks, and means for locking,` said lever to preclude its operation by the said shanks.

2. ln a lock, a casing, a bell-crank latch member pivctally mounted in the casing, a. spring tensioned between said latch member and a point on the casing to cause the latch member to project normally from the casing', a lever pivotally mounted in the casing at an intermediate point in its length, a link connecting' one end of said lever with one end of said latch member, and hollow shanks pivotally connected to opposite ends of said lever and projecting` through opposite sides ofthe casing, handles mounted on said proj ectinp; ends of said Shanks, means for locking said lever against movement, and a kei.y insertible through the shanks and engageable with'the last said means for operating the same.

3. ln a lock, a casing, a bell-crank latch member pivotally mounted in the casing, a spring; tensioned between said latch member and a point on the casing to cause the latch member to project normally from the casing, a lever pivotally mounted in the casing at an intermediate point in its length, a link connecting,` one end of said lever with one end of said latch member, pawls pivotalljv mounted in the casing` and provided with hook noses, the said lever being recessed to provide projections engageable with the noses of the pawl, and means insertible through either of the hollow Shanks for out of locking engagement with the lever.

et, In a lock, a casing, a bell-crank latch member pivotally mounted in the casing, a. spring tensioned between said latch member and a point on the casing to cause the latch member to project normally from the casing, a lever pivotally mounted in the casing at an intermediate point in its length, a link connecting one end of said lever with one end of said latch member, pawls pivotally mounted in the casing and provided with hook noses, the said lever being recessed to provide projections engageable with the noses of the pawl, stems pivotally connected with the pawls and slidably entering the hollow Shanks, and means tor shifting either et the said stems longitudinally in its respective shank to throw either of the said pawls into or out of locking engagement with the said lever.

5. In a lock, a casing, a bell-crank latch member pivotally mounted `in the casing, a spring tensioned between said latch member and a point on'tho casing to cause the latch member to project normally from the casing, a lever pivotally mounted in the casing at an intermediate point in its length, a link .connecting one end of said lever with one end of said latch member, pawls pivotally mounted in the casing and provided with hook noses, the said lever being recessed to provide projections engageable with the noses oi' the pawl, stems pivotally connected with the pawls and slidably entering the hollou`- shanks, and a key for insertion in either oi the hollow Shanks, both the key and the stems being provided with inter-engaging means whereby either ofthe pawls may be operated to throw it into or out of locking engaffement with the said lever.

6. n a lock, a pivotally mounted bellcrank latch member, a pivotally mounted lever operatively connected with the latch member, a tubular operating means for the `said lever, and locking elements for the lever provided with operating means slidably carried in said tubular operative members, but termin ating short of the outer ends thereof.

7. In a lock, a pivotally mounted bellcrank latch member, a pivotally mounted lever operatively connected with the latch member, oppositely disposed tubular operatingmeans engaged with opposite ends of said lever, locking pawls for operative engagement with the lever to preclude rocking of the same, stems slidably mounted in the tubular members and pivotally connecting` with the pawls, the stems terminating short of the outer ends of the tubular members, and a key insertible in either of the tubular members for operative engagement with the stems to effect the release oi' the pawls from the lever for the purpose specified.

In testimony whereof I atliX my signature.

THOMAS CANNON, JR.

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