US1627420A

US1627420A - Reversible door latch and lock

Info

Publication number: US1627420A
Application number: US714777A
Authority: US
Inventors: Thomas Albert Jackson
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-05-21
Filing date: 1924-05-21
Publication date: 1927-05-03
Anticipated expiration: 1944-05-03

Description

1,627,420 May 3 1927f A. J. THOMAS REVERSIBLE DOOR LATCH AND LOCK Filed May 2]., 1924 ATTURNEY.

Patented May 3, `1927. p

1,627,420 PATENT OFFICE.

yernannte QIACKSON TIIoMAs, ory CLINTON, INDIANA.

REVERSIBLE DOOR LATCH AND LOCK.

Application aieauay 21, 1924. serial No. 714,777.

This invention relates to the type of appliance that is commonly known as a mortise-lock or bolt, theinvention having reference more particularly to a combined latch and lock for Idoors that is adapted to be quickly and inexpensively applied.

An object of the invention is to provide a door latch and lock that may be com? pactly constructedof .l simple and inexpensive parts and of such form as to be adapted to beapplied in a hole bored in a door and obviate the cost .commonly entailed in the making of chisled mortises required for rectangular lock cases.

Another object is to provide a reversible door latch and lock that shall be adapted to be applied for usein a simple manner withoutrequiring expert workmanship and extremely accurate. fitting ofvarious parts together, and which. shall have strong yet inexpensive parts essentialto, lock structure. A further object is to `provide a reversible door latch and lock which may be constructed of simple parts adapted to be produced with small cost for. machine work or fine finishing operations, and which shall be strong, durable and economical `in use.

With the above-mentioned and otherv objects in view, the invention consists in a vnovel apparatus forv latching and locking 'doors provided with a cylindrical casing adapted to be applied reversibly as mayy be required on different doors; and the invention consists also further in the parts and combinations and arrangements 4of parts as hereinafter particularly described and further defined in the appended claims.

Referring to thedrawings, Figure 1 is i a fragmentary elevation of a door and its casing having the inventionapplied thereto;

Fig. 2 is a fragmentary elevation of the door frame showing the front of the keeper plate thereon; Fig. Sis a fragmentary elevation showing the edge of the door andthe inf vention applied thereto; Fig. 4 is aperspective view of a lock key on an enlarged scale, suitable lfor operating the improvedv door lock; Fig. 5 is a horizontal longitudinal secl tion of the latch and lock mechanism on an: enlarged scale, centrally of the lock case;

Fig. G is an Vend -view of an improved latch bolt retractor and controller yoke; LFig. 7 is a vertical central sectional view ofthe latch and lock mechanism; Fig. 8 is a transverse fragmentary section `approximately on theiline VIIIe-.VIII in Fig. 7 on a relatively smaller scale; Fig. 9 is a perspective view of the principal parts of the latch and lock l mechanism assembled separately from the c'asingthereof; and Fig. 10V is a fragmentary side view of the lock case.

Similar reference characters in the differentgures of the drawings indicate corresponding elements -or features of construction herein referred to in detail.

`In `the drawings the numeral 1 indicates a door frame which may be'variously constructed, and 2 indicates a door which may be variously constructed as desired and arranged to be latched and locked to the frame.l `An improved keeper is provided which comprises a plate adapted to be secured to the door frame and having a projecting striker plate 4 on one edge thereof, the middle por-` tion of the plate 3 having a' rectangular aperturet therein to receive a latch bolt, the plate havlng also recesses 6 and 6 extending from the upper and lower portions respec' tively of the aperture to receive the two bars of animproved-lock bolt. The latch and lock mechanism has a tubular or hollow cylindrical case 7 which is of suitable diameter so asto be inserted in a bore made by a standard woodboring bit, one endof the case having an end plate 8 fixed theretotobe seated on the edgeV of the door, the plate having a rectangular aperture 9 and recesses 10 and 10 extending from the upper and lower portions respectively of the aperture, similarly to that in the keeper, yin which to guide. the latch bolt and the lock bolt. rFheopposite end of the case 7 has a closure which preferably is a screw plug 11 removably secured therein. One side of the case has a key-hole 12 and the opposite side has a keyholelQ therein, the key-holes being arranged equal distances from the end plate 8, and eachone preferably `is circular. At a suitable distance fromv the -plug 11 thecasel 7 has also two

guide holes

13 and 13 in opposite portions,

of thecasing wall to receive a latch-operating spindle. The plate 8 is secured to the door `preferably bymeans of screws 14.

A novel hollow cylindrical ortubularlock bolt Abody 15.is provided which is of suitable diameter Vto freely slide within the lock case 7, and it has two

oppositelyarranged lock bars

16 and 17 fixed on the forward portion thereof that are guided in the recesses 10 and 110frespectively. The body 15 has a tension springr .18 suitably connected thereto and l tl normally pressing against the` wall of the case 7 to hold the body in place-exceptrwhen forcibly moved by a key, the spring` being arranged in a suitable recess 19. The opposite side portions of the wall of the body have longitudinal slots 2()` and `2O therein, one edge of the wall having rack bar teeth 21 thereon projecting towardsthe wall edge 22 on the opposite side of the slot, the edgey 22 constitutinga guide fora cylindrical key 23 that is tinted or shaped `as a ypinion to engage the teeth 21; the key being adapted to lit closely in the-kiey-hole 12 and being provided with an operating shank orv handle 24, whereby to move the loc-kbolt longitudinally in `the lock case.

A novel latch bolt is provided which com.F prises a bolt head 25 that ismovably guided in the apertureI 9 and has a beveled outer end 26, the upper and lower portions of lthe head that areusually'horizontal having lonF gitudinal grooves 27 and `28 respectively to receive portionsoff'the lock bars16- and 17, the grooves being opposite to thel recesses 6 and Gv. The lock boltincludes also a shank 29 fixed to the back of the bolt-head and extending partially through the body part 15, the shank havinga.crossbai-' to constitute ai'l'ehead30` on-its/inner end.v Preferably theinner side of the bodyv part 15 has longitudinal grooves 31 at opposite sides of the lock bars to receiveV the cornerportions of the latch bar head, to guide the head through the body 15 whenlvassembling the parts. A novel yoperatingfand controlling frame or yoke v32 is provided which is mova-bly guided in `the casing 7 rearward of the tubular body 15, the forward Vportion of the frame being sutliciently narrow-to enter the tubularbody, the

frame having shoulders

33 and 33" to engage the inner end of the body. A disk plate 34 is Vfixed on the forward end of the :trame and it has a slot 35 extending from the edge thereof to removably receive` the neck ofi the T-head 30, whereby the shank 29 is connected to the frame to permit the latch bolt to befretracted partially into an opening 36 provided in the frame 32. A coil spring 37 is arranged on the shank 29 and seated against the head 25 and the disk plate 35 for yieldingly holding the lat-ch bolt in projected position. The rear end of the frame 32 has aicircular guide plate 38 fixed thereto that assists .in guiding the frame in` thecasing 7, and acoil spring 39 is seated against the plate 38 and the plug 11, for yieldingly holding` the controlling frame in bolt-projecting. position. The spring -39' is rstronger than` the spring 37. The frame 32 has a longitudinal slot 40 therein and gear teeth41 to, constitute a rack-bar at one side oftheslot. Two identica-l face plates 42-and 43 are provided to besuitably secured to the opposite sides of a door, each being adapted to serve as an escutcheon plate which has a key-hole 44 therein in lalinement with the key-holes in the lock case to assist in rotatively guiding the key 23. For manually retracting the latch bolt a Vspindle 45 is arranged in the holes 13 and- 13... and extends through the slot 40, the spindle being luted or provided with gear teeth :46, that are in engagement with the teeth 41, the spindle extending through the faceplates -in which it may be suitably guided, the spindle beingprovided with knobs or handles 47 and 47/ as is customary.

T he apparatus maybe quickly mounted on a door after simply boring a hole for the lock case T and also small holes for the lock key and the spindle, the several parts being secured in place bymeansof screws. As is apparent,l the lockcase may be arranged in `relatively inverted order for attaining re.-

versibility asmay be. required -on different doors, some swinging inwardly and others outwardly while some are hinged at one side and other-son the-opposite side of a. door frame-orvcasing, or the latchingand locking apparatus maybe inverted in the lock casing; also, the latch bolt maybe inverted relatively to yth'e lock bolt and the frame 32 asappears in Figure 9.

The invention is intended to be variously modified to suit conditions and especially to lessen the cost when required for very inexpensive buildings, ythe structure permitting the omission of either the latch bolt or the lock bolt and either one or both ofthe coil springs. A

In. practical use, when the apparatus is constructed and mounted as described7 the springl 39 holds that portion ofthe frame 32 that isrearward ofthe spindle 45 so as to bestopped against the spindle, permitting the striker plate 4to force the latch bolt back against.` the pressure of the weaker spring 37 while the door is being forcibly closed the spring automatically projecting the bolt into the keeper when the door is fully closed. The spindle 45 is to be turned so as to operate the frame 32 and retract the latch bolt to permit the door to be opened, thespring 39 forcing'. thefspring 32 forward when the spindle knob is released. The key 23 is inserted in one of the key-holes and into engagement with the teeth 21 and rotatedvin order to project -or to retract the lock bolt.

that -is claimed as new is z,

1. Ay door latch and lock including a tubular case having-a front plate on one end and a Aplug' in the opposite end thereof, the front'plate having an aperture therein, a beveled latch bolt and -a lock bolt arranged togetherf and guided in said aperture for relatively independent longitudinal movement, .theilatchbolt being provid-ed onits innerend with a yoke having lgear teeth, a

spindle rotatively guided in the tubular case and having gear teeth engaging the gear teeth on the yoke, a coil spring seated on said plug and the yoke, and a key to engage and move the lock bolt.

2. In a door latch, the` combination With a tubular latch case With a front end, of a latch bolt comprising a bolt head and a shank fixed to the head, the head being movably guided in said front end, the shank having a cross-bar on its inner end, a yoke movably guided in the latch case and having a front plate on one end and a back plate on the opposite end thereof, said front plate having a slot therein loosely receiving said shank sideWise and permitting said cross-bar to engage the back of the plate, said yoke being provided With a toothed rack bar, a coil spring on said shank seated against said bolt head and the front plate of said yoke, a coil spring seated in the latch case and againstl the back plate of said yoke, and a spindle guided by the latch case and having gear teeth engaging said rack bar.

3. In a door latch and lock, the combination of a tubular case having a front plate fixed on one end and a plug removably secured in the opposite end thereof, the case having a key-hole and a bearing aperture to receive a spindle in the Wall thereof, said front plate having a guide aperture therein and recesses extending from opposite sides of the aperture, a latch bolt movably arranged in the guide aperture and having grooves opposite to the grooves in the front plate, a yoke connected to the latch bolt, a spindle arranged in said bearing aperture and having connection With said yoke, and a lock bolt comprising a body-movably guided in the tubular case and two lock bars guided in said recesses and in said grooves, said body having devices to be engaged by a key to be inserted in said key-hole to move the lock bolt.

In testimony whereof, I aix my signature on the 6th day of May 1924.

ALBERT JACKSON THOMAS.