US1557581A - Combined latch and lock for doors - Google Patents

Description

WZS- 1,5575% HARRINGTUN COMBINE]? LATCH AND LOCK FOR DQORS Filed Feb. 1923 INVENTOR' 1147/10/71). fivrrinyfo/z BY J, 4

A TT RNEY reamed Oct. 20,1925.

PATENT OFFICE.

WILLIAM F. HARRINGTON, F TOLEDQOHIO.

COMBINED LATCH AND LOOK FOR DOORS.

Application filed Febrrary To all whom it may concern:

Be itknown that I, WVILLIAM F HAR RINGTON, a citizen of the UnitedStates, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Combined Latches and Locks for Doors, of which I declare the following to be a full, clear, and exact description.

This invention relates to improvements in combined latches and locks for doors, particularly vehicle doors.

One object of the invention is the provision of a simpleform of rotating lever for retracting the latch. 7

Another object isthe provision of a latch with locking means, in which the parts are all interchangeable for right or left hand opening doors.

A further object is the provision of means for holding the rotatable lever still while the latch bolt is being actuated by the door handle. I

Still another object is the provision of an internal crank actuated lock, which shall require movement through a large angle in order to efiect the locking or unlocking operation, and also one .in which'the lock- .ingis effected long before the crank reaches its limit of motiomthus reducing the chance of failure to lock uie door even when carelessly operated. I

Other objects, and objects relating to details of construction and'econol'nies of manu- 36 facture, will appear as I proceecl'with the description of that embodiment of the invention, which, for the purposes of the present application, I have illustrated in the accompanying drawing, in which Figure I represents a side elevational view of a combined latch and lock embodying my invention.

Fig. 11 s a vertical, sectional view, taken substantially on the line II-II of Fig. I.

Fig. III is a horizontal, sectional View, taken substantially on the line III-II1 of Fig.1.

Fig. IV is a fragmentary, taken substantially on the line IVIV of sectional. View,

7, 1923. Serial No. 617,437.

Fig. 1, but with the actuating crank moved into locking position, and Fig. V is a fragmentary, elevational View of the internal lock from the side opposite that shown in Fig. I.

Similar reference characters refer to like parts throughout the several views.

In the drawing, 10 represents the main casing plate or base plate. At one vertical edge, it is bent at a suitable angle to form the front or face plate 11, in which is formed an opening in order that the latch bolt l2'may protrude therethrough. The latter slides upon the face of the plate 10, being guided by the walls of the opening in the face plate 11 and between lips 13 struck up out of the base plate 10. vAt the rear end of the bolt, there is an offset portion 14 which slides in upper and lower tracks 15 having vertical flanges 16. These tracks and flanges are bent upout of a second smaller casing plate 17, which "isfastened'to the plate 10 by suitable means, preferably by tongues 18 set into slots in the face plate 11, and by screws 19 extending through spacers 20 and threaded into holes in the base plate 10.

The plates 10 and 17 are metal stampings, and are symmetrically formed so as to be capable of assembly foruse either upon right hand opening doors, so

or left hand opening doors. To this end, both plates have circular openings, 21 in 10 and 22 in 17, similarly located upon opposite sides of the bolt 12. Corresponding openings 21 and 22 upon each side of the bolt form a bearing of \dimensions equal to that formed by the similar openings upon the other-side. Either of these hearings is adapted to receive the journal 23 of a latch bolt actuator, 01 the journal 24 of an external lock. These journals are formed as shown, with square openings to receive the squared shank of a door handle, or the squared end of a lock barrel respectively, all of well known construction, and therefore not illustrated herein.

The latch bolt 12 is provided with oppositely extending wings 25. On the jour- -preferably sheet I nal 23 there is integrally formed an arm 26 having a cam surface adapted to bear against the end of the adjacent wing 25, and to move the sameto the left as viewed a Fig. I, when the door .handle. is rotated 111 the proper direction, thus retracting the latch bolt.12. Obviously, when the journal 23 is mounted in'the other bearing,-it may be operated to act against the other wing with the-same effect. The journal 24 has integral therewith, a projection 27 which may be rotated into the path of movementof a shoulder on the forward portion of the latch bolt, as shown in Fig. I, and thus pre vent the retracting of the same.

the journal 24 may be mounted in the other bearing, and similarly operated to produce the same effect. 1 p .The latchbolt 12 is normally urged toto ward operative position by a coil spring 28,

the inner end of which is mounted between two lugs 29 struck up from'the base platelO,

' and the outer end of which has a straight portion 30 bearing'against the curved inner end of the main portion of .the bolt. .A

groove 01' trough 31 is formed in the plate H open,towards the plate 17 and running at right angles to the bolt '12. This trough -extends entirely through the plate '10 from 9 one edge to the other, except that it is cut away at the center to form a slot 9, as-

' clearly shown in Figs. II and III. In this trough 31 are laid a pairof bushings. 32

bothprovided with external slots or grooves J 33 which may extend entirely around the bushin s, if desired. Projections 34 on the plate 1 extend into the grooves 33, and in co mbinationwith the trough, serve to hold the bushings properly positioned without any other means of fastening. This construction forms'a sufiiciently rigid mounting for the bushing, while at the same time it I permits ofthe slight motion necessary to 'automaticallybring thejbushings into accu- 46 rate alignment when the shaft or rod 35-is passed through-them.- Y

At one'end of the rod 35 is an operating handle 36, while a crank arm 37 with a cam .end 38 is secured to the rodnear its opposite end, preferably by a pin 39 extending through aligning holes in the rod and crank arm. The hub of this crank arm extends through'the slot 9 in the trough 31, and by engaging the walls of the slot, properly the same longitudinally. The cam end 38 of the crank arm extends into a slot 40 inthe offset portion 14 of the latch bolt 12.- The end wall of this slot is preferably I Founded, as shown at 41 inFig. 111. As the linthe hub ofthe crank arm-37 are cut two notches 42. A flat spring 43 secured inoperative position.

Obviously,

positions the rod and prevents motion of" to the back of the base plate 10, has an angular extremity adapted to catch in one of the notches 42 when the rod is in its normal When the parts-are assembled with'the rod extending into the casing from the opposite direction, the end 1 of the spring 43- will engage the other notch.

Provision is made for locking the door from the inside bythe following means. The bolt actuating arm 26 is notched out at the top, as indicated at 44. A locking pawl 45 is pivoted at46 to the base plate 10, and the opposite or free end is adapted to engage the notch44 so as to prevent motion of the arm 26, and consequently to prevent the re traction of the latch bolt by the door handle. In Fig. I, the locking pawl is shown at the-upward limit of its motion where it clears the notch 44 by only a small distance,

and where" it still lies entirely below the upper edge of the plate 10. The pawl is rockedv upon itspivot by means of a small eccentric 47 extending into a sl0tj48 in the pawl. This eccentric is on the end of a smallrock shaft 49, having a bearing in the plate 10, and prevented from having longitudinal movement by any suitable means, such as a shoulder 50 -on one side of the plate, and a; pin 51 projected through a hole inthe shaft onthe other side of the plate. On'the outer squared end of the shaft 49 is mounted acrank 52 held on to the shaft by suitable means, such as a set-screw 53.

The parts are shownin the drawing as sembled for use upon a right hand opening door, as viewed from the outside. When a lock is to be assembled for use upon a left hand opening door, the latch bolt actuator 23, 26, and the external lock 24, 27 are a plane normal to their surfaces, andincluding' the axis'of the latch bolt, except for the lugs 29. A second set of these lugs is unnecessary, because it is immaterial whether the spring 28 be located above or ,below the sliding bolt.

The operation of the device will be obviousfrom the above description of its parts.

Before the-bolt 12 can be retracted so as to permit the opening of the door,-the pixie-- jection 27 constituting part of the external lock, must be revolved from the position iii which it'isshown in Fig. I so as not to en- I.

the shoulder on the bolt. bolt may ,be. retracted by the actuator 23, 26, or by the oscillatable rod 35. If the actuator 23, 26 is employed, the oscillatable' rod remains stationary, being held in the position shown in the drawing by means of Then the wearer the flat spring 43, with its extremity in the.

notch 42, as shown in Fig. Hi. When the rod is moved from its inoperative position shown in the drawing, by means of rotative eliort applied to the handle 36, the end of the spring 43 is disengaged from the notch 42 and the crank arm 37, 38 acts to retract the bolt 12 by applying pressure to the vertical curved surface 41 on the ofl'- set portion of the bolt. part of this motion, the crank tends to force the offset portion away from plate 10, as well as toslide it to the left. This tendency is counteracted, however, by the vertical flanges 16 on the tracks 15. in order to 100K the door from the inside, it is only necessary to move the small crank 52 from the position shown in Fig. l to substantially the position shown in Figs. IV and V, after which it is impossible to turn the door handle (not shown) mounted in the journal 23 and extending outside the vehicle. When locking from the outside of the vehicle is desire a key operated locking barrel (not "shown) is actuated to turn th journal 24 so as to bring the projection 27 into the position shown inFig. l.

l claim as my invention:

1. In a lock for vehicledoors, a pair of easing plates arranged in spaced parallel relation, one of said plates being shaped to form a trough open towards the second plate, a bushing fitting said trough, interengaging means between the bushing and the second plate for holding said bushing against'Inoveme'nt in the trough, and a rod mounted within said bushing.

.2. ln'a loci; for vehicle doors, a pair of easing plates arranged in spaced parallel relation, one of said plates having a trough therein open towards the second plate, a bushing fitting said trough, said bushing having a small groove in its exterior surface at right angles to the trough, a pro jec-- tion upon said second plate taking into the groove to prevent the movement of the bushing bodily in said groove, and a rod mounted for movement in said bushing.

in a lock for vehicle doors, a pair of casing plates arranged in spaced parallel relation, a one-piece cylindrical bushing located between the plates, interengaging means between the bushing and one of the plates to prevent movement of the bushing in the direction of its axis, means upon the other plate to prevent movement of the bushing in a direction at right angles to its axis, and a rod mounted for movement in,

said bushing.

l. In combination, a vehicle door latch bolt, means tending to throw said bolt to operative position, a bolt retracting means, a pawl for preventing the operation of said retracting means, said pawl being pivoted at one end, and a pawl actuator located in- During the first.

. portions extending into proximity termediate the ends of the pawl and operable through a large angle to move the free end.

of said pawl through a small angle.

5. In combination, a vehicle door latch pivot, saidactuator being arranged to re .quire a large movement in'order to produce a small movement of the free end of the pawl.

'6. in a loclr for vehicle doors, a casing plate formed with a trough therein, a bushing fitting said trou h, an external groove in the bushing atrig 1t angles to the trough, a bushing retainer attached to said plate and taking into said groove, and a rod mounted for movementwithinsaid bushing.

.7. In a lock for vehicle doors,-a casing plate formed with a trough therein, oi bushings fitting said trough and arranged therein in spaced relation, each of said bushings having'a groove in its/periphery at right angles to the axis of the trough, a bushing retaining means attached to, said plate and having portions adapted to take into said grooves, said last named means permitting slight motion of the bush ings whereby they may automatically align themselves when a rod or shaft is mounted within them,

8. in a lock for vehicle doors, a casing, a

latch bolt mounted to slide in said casing,

bearings of equal dimensions arranged upon opposite sides of said bolt, said bolt having of said bearings, and a bolt lock and a bolt actuator having journals of equal dimensions adapted to fit in either of said bearings.

9. In a lock for vehicle doors, a-casing plate, a bolt mounted to slide horizontally thereon, said plate being shaped to form a trough extending vertically therethrough from edge to edge, a bolt actuating rod having a handle at one end, means for oscillata pair with both llll ably mounting the rod in said trough with the handle end extending beyond either edge of the plate, a spring for releasably holding the rod in inoperative position, and means upon the rod for co-operating with said spring in either arrangement of the rod within the trough.

10. in a lock for vehicle doors, a casing,

a latch bolt mounted to slide in said casing, bearings of equal dimensions arranged upon opposite sides ofsaid bolt, said bolt having portions. extending into proximity with both of said bearings, and a bolt lock adapted to fit in either of said bearings.

11. In a lock for vehicle doors, a casing, a. latch bolt mounted to slide in said casing; bearings of equal dimensions arranged upon I 5 12. In a lock for vehicledoors, a casing, a

"opposite sides ofsaid bolt, said bolt having i portions extending into proximity with both portions extendinginto proximity with both of 'said'bearings, a bolt actuator adapted to 10 'of'said bearings; and a bolt actuator adapted be journaled ineither of said bearings, a

to be journaled in either of said bearingslocking pawl for said actuator, and means formounting said pawl upon said casing latch .bolt -mounted to slide in said casing, near either one of said two bearings.

bearings of equal dimensions arranged upon In testimony 'whereoffl aflix my signaturel opposite sides of said bolt; said bolthaving lVILLIAM F. HARRINGTON.

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