US1755832A - Door latch - Google Patents

Description

R. MARPLE DOOR LATCH April 22, 1930.

Filed March 26, 1926- if! el Patterned Apr. 22, 1930 entrenar-Aras ATE NT Retro MARBLE., or CHARLOTTE., MiO-riser, Assieme mo. HANCOCK. MEG.. or

` CHARLOTTE, niemeer, e OOrrOrlarIoN Or vMicanaar noon LATCH application rfiled March 2e, ieee. l mai No. l97,5229.

The presentinvention relates to :improvements in latches forvehicleadoors x'and has particular.y 4reference to latches-.ofthe type..

which maybe @actuated from the outside or from theinside of the vehicle and which may be :dogged from the inside .against being actuated from Vthe-"outside, vsozthat .the occupant ofthe .closed vehicle may .dog-'the latchesof all the doors'encept one from the inside and then lock 'the remaining Idoor afterleaving the vehicle bymeans o-ithe nsu al lockingliey.. vThe prima@7 lobject odi the invention isto provide ra new .and .improved latch .of the above l.type which is simple.,'inexpensive `and capableof easy andcertain operation.

A further object is to provideanovel .door

latch in which a single' means is employedv foractuating the. latch .from the inside andA t f direction from yits normal posi-.tion to dog for actuating doggingl-Inegans adapted to prevent opening .of the door from the outside of the vehicle.l li

A more specificV .object Yis :to provide :a

movable operating member for lthe inside yof the door which lin .operating `in one direction from normal position nnlatches the door and which upon actuation inthe .otherdirection fromnormal position )serves to lock the door against un'latehing .by the .outside operator.kr

Another .object .is to provide a lever construction which directly nnlatches .the door l and directly `dogs the latch parte..

Another object is` to provide a detent inechanisniassoci-ated with theinside 'lever to`-aid in determining the normal or'nonclogging position `of the lever whereby' to prevent the lever passing readily vinto 'dog-f gingposition.V e l Further objects and" advantages will becorne apparentas the description proceeds.

,In the accompanyingdraving'sv, Figure l is an inside view in vele'xvation oit a latch con- StruOted .according tO my nventionithevparts being shown innormal position.` l

Fg-L Q'is a View Similar .tO Eig.. l wrt-h the cover plate removed yshowing the latch in dogged position. v e Fig. `3 is a fcross sectional view on the line a-.s of rig. 1.

vFig. 4 `is ,a fragmentary viewavithnthe ycover relnoved of the latch in unlatched position.

flthough the invention is susceptible of various modifications and .alternative .con`` stiriictions l have shown in the drawings .and will heneinzdescribe in ydetail the preferred embodiment, and it is to be understood *that` the mechanism againstopera-tion l.of the outsid-e operator. The plate .or lever itseliu-ne-l tions dlrectly l,as Ea dog for thelateh mechaA` nisin. VFor .determining the normal position of .the operating lever, means .is provi-ded` which .exerts obstructing force to be ove-r.-

coine inpassing into the lclogging `position from the normal position.

Referring tO the .exemple-,rvembodiment@ the invention, the :above .cond ons areeiff-ect-ved by providing an operating-lever with a vhai-,Mile which is mOVablO with respect tO. the

lever, lpreferably in a ,pivotal relation, so thatwhen aOtuated One direetien from normal position .the lever and hand-le have One. pOstOn and when actraid :in the-other direction the lever and the hand-1e have another relation,v e In .theldevc ofthe drawings the .latch comprises a .flt base plate l0v and ...a .side 1l. .Sorrent the working parts are enclosed Within a space between the base 'plateflO and a cover 'plate'll'x 'The coverpl'ate is rigidly. secured to `and 'spaced from the hase by. kl.;-A yshaped. lugs 13 `formed on the vcover 4plate which Ain part abutthe base plate and i-n part pass therethrough and which are turned 4over ont'li'e opposite side of the base.v A latch bolt vceinprising a relatively thin strip lli and a thicker attached beveled head l5 is mounted to slide ,onthe -base plate, .the head 15 projecting through an aperture inthe flange 11. Lugs 16 and 17 struck inwardly from the base provide guides for the latch bolt. A spring 18 secured to the base urges- The roll-back 20 also has another arml V which has a shoulder 26 acted upon by an inside operator to unlatch the bolt and also asecond shoulder 27 against which a dogging obstruction is placed to prevent operation of the roll-back and hence to prevent un' latching of the door from the outside. A coiled contractile spring 28 is suitably arrangedl to urge the roll-back into the position shown in Figs. 1 and 2. v

A movable member is provided to serve as the inside operator which is so arranged that stopmeans operates to arrest its motion in a sc -c'alled normal position. A movable element associated `with said member can be moved relativev thereto to clear the stop means, thus permitting further movement of the inside operatorbeyond normal position. In the present instance, the inside operator comprises a rocking or lever plate designated generally as 30 which isfpivoted at to the base 10. The plate has ngers or projections which loosely encompass one arm ot the rollback 20 so as to permit a limited rocking of the plate Without aecting the roll-back.

One linger 32 acts on the roll-back shoulderV 26 to unlatch the bolt, the parts moving from the normal position of Fig. 2 into the unlatched position shown in Fig. 4. The other tinger 33 of the lever plate is arranged to be positioned out of the path of the roll-back during the above described unlatching operation'but it is further arranged to be moved into Vthe path of the roll-back for cloggingV the same.

These two positions are shown respectively in Figs. 1 and 2. Theinger 33 is provided with a straight nedge 34 which cooperates with the shoulder 27 of the rollback 20, said edge 34 being substantially perpendicular to an intersecting radius through the pivot 31. By this construction the force Vof the roll-back when vexerted on the lever plate 30 is radial and hence the plateserves,

to unlatchor to dog the bolt according to 1 which direction it is moved from its normal position of Fig. 1.

In the present instance, the lever plate 30 is provided with a handle 35 carried on an arm 36 pivoted to the plate 30 at a point 37 intermediate the ends of the arm 36. The pivoted arm has a limited range of movement relative to the plate. The end 38 of said arm passes close to pivot 31 of the lever plate thus limiting Vits motionV in one direction, and the end oi' the arm is arranged normally to abut the upper side of the base lug 16 (Fig. 1). The arm 36 Vhas a normal relation with the platepdetermined in part by providing an obstructing lug 39 on the plate so that when moved to unlatch the bolt the arm and lever are rigid. The rnormal position is further determined by a detent mechanism' (Fig. 3) comprising a recess 4() in the plate'7 a hole 41 in the arm, a steel ball 42 to cause the hole and recess :to register and a spring 43 pressing the ball into the recess. The spring 43 is a wide leaf `anchored in the cover-'plate 12 as shown at 44 (Figs. 1 and-3).

' As a result of the above construction the control handle andarm are movable clockwise from normal positionrelative to the plate 30 byy exerting sufficient torce on the handle to move the ball 42 out of its recess against spring 43. YThis movement is limited by thearm striking the pivot 31. At'the same timefwliile in this limiting abnormal position the arm is so arranged that it renders the stop means ineffective toholdthe lever plate from entering its clogging position. In the present instance, since the end 38 of theV arm has moved to a position to the left of the lug 16 (Fig. 2) ,the arm is thus free ofthe lug and the latter no longer serves to limit the clock-V wise rotation of the combined lever plate and handle. This permits the plate 30? to rock further in a clockwise direction to bring its inger33 in a position to dog the r-oll-back 30.

The spring 28 above described is attached so as to urge the lever clockwise and is preferably secured to the arm 36.- Arfhus the spring acting through the arm at all times urges the lever plate 30 in a clockwise direction, at one time limitedby the abutment of arm 36 on lug 16 and at another time by the interlocking engagement of the clogging finger 33 or' the lever plate 30 and the shoulder 2T of the roll-back 20. c When the spring is so attached to the arm, the detent ball mechanism can be omitted, but it is preferably retained, since it assists in determining the normal position of the parts and provides a given force to be overcome in moving the inside control to dogging position.

' The device in loperation normally occupies the position shown in Fig. 1, the control handle arm extending vertically, clogging finger 33 being positioned out of the path of shoulder 27 of the roll-back 20, and the shoulder 32 on the lever plate being in conthe top of vnormal relation. In of the arm 36 about its pivot 37 `the en for limitedmovemenIA said rigid structure if' mechanism operative stretches the spring 28 w `ich automatically returns the lever .to its normal position. TheV lever comes to rest in its normal position by the engagement of the lend 38 of arm'36 on the stop lug 16 of the base plate. yWhen it is desired to dog the mechanism against operation from the outside the handle 35 is moved in a clockwise direction f from its normal vertical position. In so moving the .handle 35 the arm 36 does not at first move about pivot 31 because it rests upon the stop lug 16 which thereby prevents such rotation. In consequence the arm 36 moves pivotally about its pivot 37 .onthe plate 30.

. This movement takes place against the spring 28' and also against the spring 43 which normally holds the cause the arm and ball 42 in a position to plate to maintain the the clockwise rotation 38 of said arm slides along the lug 16 and near the limit of its motion it slips oil the lug 16 permitting the lever and plate to move again as an integral body about the lf plate or lever pivot 31. This motion carries into clogging relation he dogging finger 33 of the -roll-back and with the shoulder 27 thus holds they latter in a. fixed positionagainst operation from the outside.

' It will thus be seen that I have provided a latch construction which is not only simple f in operation but as well, `simple in construction. It is clear that other constructions and modifications of the parts may be made f which are within the contemplation of the invention, as expressed claims. c

I claim as my invention: l )l v 1.A A door latch comprising, in combinalatch bolt, a springin the appended actuated roll-back bolt, means arranged for actuation by an outside operator to actuate the roll-back, a

' rocking member actuated Jfrom the inside and arranged to be moved in one direction from position, said stop and said arm being arranged to clear each other on moving the arm relative to the rocking member whereby to permit moving the rocking member into a position to dog the roll-back, and detent "01;1 'the fallback-.

This ymovement L dle-arm on 'said lever "member comprising a rockingv 6. In a device of the character to hold the arm and rockingy member normally in said rigid 2. A door latch comprising., in combinatipn, a spring-pressed latch bolt, a springactuated roll-back arranged to `unlatch said bolt, meansy arranged for actuation by an outside operator to actuate the roll-back, a rocking member .actuated from the inside and arranged to be moved in 'one direction from a normal position'to actuate the rollbacl; and in the other direction from said normal position to dog the roll-back, a handle-arm pivoted intermediate its ends on said rocking member for limited movement, said arm land rocking member acting asa rigid structure in one limiting position when moved to unlatchl the bolt, a stop in arm to prevent the rocking of the plate into dogging position, ksaid stop and said arm bewhereby to permit moving the rocking memthe path of said i ber into a position to dog the roll-back, and n a spring tending to hold said arm in a posid` tion to strike the stop.

3. In a .do-or latch of the character de:- scribed, having a roll-back to unlatch a bolt, an inside operator comprising, in combination, a rocking platehaving one part to move the roll-back when rocked in one direction from a normal positionfand another part ,tov fdog the roll-back when rocked in the ,other direction from said normal position, a hanpla-te for-rocking the plate, said arm being pivoted intermediate its ends a spring betweenl tion, stop means larranged to act on the arm at said position to prevent rocking the plate into clogging position, said meaIlS being arranged tovclear the arm when said arm is moved into itsother limiting position, whereby. said spring draws the arm and rocking plate into dogging position. c f 4. yInV a latch ofthe character described having a latch plate pivoted for motion in one direction to dog the mechanism and in the V to actuate the mechanism, vsaid plate being formed to act directly on said mechanism to` actuate itandfto dog it.

fk5. In la latch ot the `character described, a plate and a handle member pivoted to said plate :tor limited motion relativeto the plate, and a stop lmea-ns for said plate actuated by the pivotal movement of said handle member to .engageand disengage said plate. Y v

described, yamovable member', an element carried by said member having a limit-ed pivotal connection therewith, a spring acting on said ,element to move the member, stop means'in the path ,of the movable member arranged for engage- IHOVHg Inehansm, a rocking other direction.

Vico

to said plate for alimited pivotal movement, e

the arm and the roll-back c, tending to hold the varm in one limit-'ingposi- .into the dogging ment With said element to limit the motion of the member, said element being arranged upon pivotal motion to clear the stop means to permit further motion of the member un;

y der'theinuence of said spring.

7. In a device of the character described, a movable member, an element associated Vwith said member and arranged to have a limited 10Q a spring tending to move the member, stop movement relative'to said member,

means 'positioned to prevent motion of vthe member under the iniuence. of said spring, said element being so related to said member vand said stop means that relative motion of said dogging position is initiated.

9. A door latch having, in combination, a

- spring pressed bolt, a roll-back, an outside Voperator for actuating the rolleback and thereby the bolt, and an inside operator comprising an operating arm, a member movable in the operation of said arm and having Va part adapted inthe movement of said armV in kone `direction to actuate the roll-back and having a dog adapted in the movement of the arm in the opposite direction to engage said roll-back to hold` it against operation by the outside operator, and means acting upon said arm to hold said dog in operative position against movement by the outside operator.

l0. A door latch having, in combination, aspring'pressed bolt,-a roll-back, an outside operator for actuating the roll-back an'd thereby the bolt, and an inside operator comprising an operating arm, a member movable in the operation of said arm and having Y a part adapted in the movement of said arm in one direction to actuate the roll-back and -having a dog adapted in the movement of the arm in the opposite direction toV engage said roll-back to hold by the outside operator, and a stop with which said arm is adapted to engage in the `operative position of the dog to hold the latter against movement by the roll-back.

11. A door latch having, in combination, a spring pressed bolt, a roll-back, an outside operator for actuating the roll-back to Withdraw said bolt, and an inside'operator comprising a member having an actuating part and a clogging part, said actuating part being adapted in the movement of the member in one direction to operate the roll-back andV said dogging part being operable in the it against operation movement of the member in the opposite direction to engage and hold the roll-back against movement by the outside operator, said member also Ahaving positively act-ing means associated therewith to hold the dogging part in operative position.

In testimony whereof, I have hereunto afiixed my signature.

ROLLO MARPLE.

Images