US2589405A

US2589405A - Latch

Info

Publication number: US2589405A
Authority: US
Inventors: Charles W Lang
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-09-03
Filing date: 1948-09-03
Publication date: 1952-03-18
Anticipated expiration: 1969-03-18

Description

March 18, Y 1952 2,589,405

C. W. LANG LATCH Filed Sept. 5, 1948 2 SPEETS--SHEET l /a FLE'. L 4/ 7415:' I l INVENTOR.

Char/es W ang HTTOR/VE Y Patented Mar. 18, 1952 UNITED STATES PATENT OFFICE LATCH Charles W. Lang, San Francisco, Calif. Application September 3, 1948, Serial No. 47,623 s claims. (o1. ce2- 170) This invention relates to a door lock or latch set construction wherein a spindleis moved slidably back and forth along its longitudinal axis to open and close a latch bolt. 'Locks or latch sets of this general character are known. The present invention provides a rugged lock construction Which is relatively inexpensive tomanufacture.

It is in general a broad object of the present invention to provide a novel and improved construction for a door lock or latch set of the character described.

A furtherV object of the present invention is to provide a novel form of spindle construction for a door lock which is'adapted to movealatch bolt upon longitudinal sliding movement of the spindle.

The invention includes other objects and featuresof advantage,some of which, together with .the foregoing, will appear hereinafter wherein the present preferred forms of door lock are set forth.

In the drawings accompanyingand forming a part hereof, Figure l is a transverse vertical section taken through a latch set embodying the invention, the view being taken more particularly along the line I-I in Figure :2.

Figure 2 is a section'taken horizontally through a device embodying the present invention, the view being more particularly along the line 2.-.;2 in Figure l.

Figures 3 and 4 arerespectively sections-taken along the lines 3--3 and 4-4 in Figure 2 and illustrating the relation of the spindle, the latch bolt and the locking means employed.

Figure 5 illustrates a modied form of the invention wherein separate locking means for the latch bolt-are provided at each end of the spindle.

Figure 6 is a section taken along the lineV 6.-6 in Figure 5 and illustrating the spindle, latch bolt and lock in the latch bolt unlocked position.

Figure 7 is a view similar to Figure .but showing the same parts in locked position.

Figure 8 is a section taken along the line 8--8 of Figure 5 and illustrating the relation of the latch bolt, spindle and locking means in their respective unlocked position.

Figure 9 is a view similar tov Figure- 8 illustrating the spindle, latch boltand locking means in their respective lockedpositions.

Figure l0 is a fragmentary View illustrating the construction of the spindle and the operatins means provided for thev latch bolt. and teken, along the line Ill- I0 in Figure 5.

Figure 1l is a section taken along Y*timeline Il-,Il in Figure 5 and showing the parts in unlocked position While Figure 12 is a similar section but with the parts in locked position.

Figure 13 is a View generally similar to Figure 10 but wherein the latch bolt can be locked `as well as the spindle.

Referring to the embodiment particularly shown in Figures 1 4, the structure includes a latch bolt generally indicated at I6 and which is adapted to be moved back `andforth to release or to engage the usual keeper plate (not shown), this movement being accomplished by the spindle structure generally indicated at I1. The latch bolt is shown as mounted in a typical support as Wooden door l, the bolt being 'guided'and restrained by a plate I9 secured by screws (not shown) in the door. The plate includes a c ircular extension 2! acting as a guide for the latch bolt. l

The latch bolt I6 includes an end member 26 having a flat face 23 therein parallel to the axis of the latch bolt and an angular face 21 thereon, adapted to ride over a keeper plate provided in a door frame and lock yagainst such a keeper plate in the usual manner. Flat face 23 rides against a flat side of the aperture in the keeper-plate to position the bolt non-rotatably. Latch bolt I6 includes a latch plategenerally indicated at 28 and having an H-shaped slot 29 formed therein to receive spring 3|,"the latter being positioned by legs 32 and 33 defining the H -shaped slot.

Mounted in aV suitable aperture 4linthe door is a housing structure, generally indicated at 42 and having an opening 43 therein through-Which theY latch bar i6 projects With spring A3| resting against the casing, so that any movement of the latch bar from that position in which it is shown in Figure 2 is resisted by compression of spring 3| between the casing and member 26.

Casing 42 includes a first dished member 44 generally cylindrical in outline and having a at or base portion provided thereon so that the member can be readily mounted in any circular aperture. Mounted upon the member 44 is a second dished member 46, this member being somewhat deeper than dished member 44 and having a flat or base portion 4l spaced from base portion 45 by the Width of latch plate 28, as appears in Figure 2, to provide a slidable support therefor. The outer peripheral rim portions 'te and 49 are received within a rim portion' and a cover plate 5I, the three being suitably ysecured togetheras by soldering, brazingor the like.

A tubular extension 53 mounted vupon the second dished member 46, the two being secured together as by turning over a portion of plate 53, as indicated at 54, in suitable apertures in plate 41. A cover plate 56 is secured in position by screws 51, the latter engaging threaded holes 58 formed integrallyV in plate 45; the cover plate engages that side of the door opposite to the

flanges

48 and 49 so that the casing 42 is securely held in position. A spring cover` plate 59 is provided, the latter having a rim 60 fitting snugly over the peripheral edge of cover plate 56.

The extending ends and 52 provided respectively upon cover plate 5| and tubular extension 53 are bent inwardly to provide bearing structures supporting a spindle structure generally indicated at |1 for sliding along its longitudinal axis.

The spindle structure includes a tubular member 1| having slots 68 on opposite sides thereof to pass slidably the latch bolt 28. This member can be formed of a nat plate from which one or" Y the slots is cut, while the plate is at; thereafter the plate is bent into cylindrical shape with the edges spaced apart to provide the other opposite slot. Mounted within and secured to the tubular member 'H is a tubular member 61, the latter being held in position by a pin 16 which extends through Vtubular member 69, the latter having slots corresponding to slots 68.

Mounted `upon the pin 16 is a roller 12, the latter being engaged in a cam generally indicated at 13 and which is made in the form of a right angle triangle, generally an equilateral triangle in which one side 14 is parallel to the longitudinal axis of the latch bolt, one side 15 is transverse to the longitudinal axis while the base 15 is at an angle of about 45 to this axis. The normal position of the pin and roller in the cam is as appears in Figure 2 wherein the pin and roller are adjacent the rear of the bolt. In this position, the latch bolt can be moved rearwardly against the resistance provided by spring 3| without movement of the spindle. This type of motion is required, for example, to permit a door to swing into closed position without operating the look. When the spindle is moved to the right in Figure 2 in the bearings provided by portions 6| and 62, pin and roller 12 will move across the angular cam face 16 and will move the latch bolt rearwardly, thus serving to retract the latch bolt from engagement with a keeper plate and permit the door to open.

To provide a lock for the spindle, a sleeve 69 is rotatably mounted upon tubular member 61; this member likewise can be formed initially from a at piece, the various cut-outs made, the piece then rolled into cylindrical form. Sleeve 59 includes a slot 82 at one mid thereof in which an extensionY 83 is slidable, the extension being carried upon a tubular member 34 having a plurality of teeth 86 formed thereon. A spring 81 is positioned between door knob 88 and plate 89, provided in the tubular member 84 to bias the latter into engagement with cooperating and corresponding teeth 9B formed upon an end of the tubular member 61. The sleeve 69 and the tubular member 61 are locked in position by a tongue 9| in the sleeve 69 fitting into a slot 92 on the tubular member 6l. The sleeve 89 includes an extension 55 thereon,fhaving a slot 99 formed therein to receive and retain tonguelll at the rear of the latch plate 28. Thus, to lock the spindle in the position shown in Figure 2, it is only necessary to rotate knob 88 approximately 45 and sufliciently to move teeth 8B and 98 relative to one another one tooth. Rotation in the op- F posite direction is effective to release the lock. The rear end of the latch plate 28 includes, in addition to tongue IUI, a cam face |92 (Figures 2 and 3) which, when the spindle is locked, rides against a cooperating cam face |83 on extension 96. If the latch plate s moved rearwardly, the lock on the spindle is released, cam face |62 on the latch plate engaging cam face |63 on the extension 96 and rotating' this to permit the latch plate to move past the extension and so releasing the spindle from engagement with extension |0| this can occur, for example, when, inadvertently, the spindle has been locked against sliding while the door is open and the door is then moved toward and into closed position.

Knob 88 is usually suitably fixedly secured to sleeve 69 in Figure l, one or more ears 33 are bent into a cooperatively positioned notch in the shank of the knob.

At its opposite end, member 1| includes a plate |01 positioned therein and serving as a rest for a spring |88 which biases a ball |89 into engagement with an aperture in a slidable plate ||2, the latter including a tongue ||3 movable through an aperture in member 1| and into engagement with a like aperture in the tubular ex tension H4 on the second knob H6. This permits the second knob ||6 to be placed in position so that the lock can be readily assembled or disassembled.

In that modification shown in Figure 5, the slidable spindle can be locked selectively by either one of buttons |3| and |32 provided in the knobs ||6 and |33. In this modication, knob |33 is mounted directly upon slidable spindle |31 and retains a rotatable button |3| in position in a recess |35` in slidable spindle |31. The button |3| carries'a tubular extension |4| which is rotatable in a sleeve |42, the latter in turn being slidable in spindle |31 and having a tongue |43 fitting in a slot |48 in spindle |31. The end of sleeve |42 has a plurality of notches |44 therein engaging like notches |45 in sleeve |46. A blade |41 (Figures 5, 6 and '1) ts across the recessed ends of extension |4| and sleeve |46 and is notched to receive these; plate 45 carries a notch |48 therein to permit the blade |41 to pass to the left (Figure 5) in that position of the button shown in Figure 5. When the buttonis rotated and the blade is moved out of registry with the notch (Figure '1), then the spindle cannot be moved axially; plate 45 is provided with a recessed portion |49 to permit the blade to move out of registry and retain it against sliding. At the same time, tongue |5| on extension |4| is rotated into a position in which it rests against cam portion |52 on the end of the latch plate 28 so that, if the spindle is locked against sliding when the door is open, the latch plate can release the spindle and the door can be closed.

Knob I6 is removably mounted in the spindle by a disc member |16 having a tongue |11 fitting into an aperture in the knob shank. The disc is forced into the position in which it is shown in Figure 5 by cylinder |18, the latter having a conical end |19 fitting into a conical receptacle |8| in the disc |16. A spring |82 is positioned between the cross piece IEA-andv the conical end |19. When it is desired to remove the knob, tongue |11 is pressed inwardly to force the disc transversely and compress spring 02, whereupon the knob can be removed..

In that form of device shown in Figure 13, the sleeve |6| includes an extension IBIA which, when the sleeve is rotated as by manipulation of button |32 into that position wherein the spindle cannot move axially, extension |6|A is moved into position wherein it extends across the back of the latch plate; the latter is notched as at |04 for this purpose and one of spacers |10 is made shorter than the other to permit rotation of the extension ISIA. Thus, the latch plate, as well as the spindle, can be locked against sliding.

From the foregoing I believe it will be apparent that I have provided a novel, rugged and simple form of lock which can be manufactured relatively inexpensively, utilizing sheet steel and brass and employing punch presses to form most of the parts.

I claim:

l. In a latch of the character described, a latch bolt slidably mounted in the latch and having a flat end thereon, a cam slot formed in said at end, said slot being generally in the form of a triangle having its base extending substantially at 45 to the axis of the bolt and one side extending parallel to the axis of the bolt and the other side at 90 to said axis, a spindle slidably mounted in the latch and having a slot formed therein to receive said latch bolt flat end,` a pin carried by the spindle and engaged with said cam slot to move the latch bolt axially upon axial sliding movement o f the spindle, an extension on the end of said latch bolt iiat end, and means rotatably supported on the spindle for engaging said extension to hold said spindle against sliding.

2. In a latch of the character described, a latch bolt slidably mounted in the latch and having a flat end thereon, a cam slot formed in said fiat end, a spindle slidably mounted in the latch and having a slot formed therein to receive said latch bolt fiat end, a pin carried by the spindle and'engaged with said cam slot to move the latch bolt axially upon axial sliding movement of the spindle, an extension on the end of said latch boltl fiat end, and means rotatably supported on the spindle for engaging said extension to hold said spindle against sliding.

3. In a latch of the character described, a

6. side-extending parallel to the axis fof the bolt. and the otherside at 90- to said axis, alspindle slidably mounted in the. latch, said spindle beingtubular in section and having a continuous slot along one side thereof to receive saidflatch bolt flat end, a pin carried .by the spindle and engaged with'said cam slot to move the latch bolt'axially upon axial sliding movement of the spindle, an

extension on the end of said latch bolt at end, and means rotatably supported on the spindle for engaging said extension to hold said spindle latch bolt slidably mountedv in the latch and having a flat end thereon, a cam slot formed in v.

said flat end, said slot being generally in the form of a triangle having its base extending substantially at 45 to the axis of the bolt and one against sliding.

4. In a latch of the character described, a latch bolt slidably mounted for movement back and. forth along a first axis, a spindle-slidably mounted for movement back and forth along a second axis at to the first axis to move 'the latch bolt; a casing mounting the spindle 'and meansV for latching the spindle against sliding movement including Ia button having an 'extension thereon, a sleeve slidable in the spindle and supporting said extension for rotation, a blade extending tranversely of the spindle and mounted Y on the extension for rotation between a'spindlesliding position wherein the blade is movable through an aperture in the casing and a spindlelocking position wherein the blade engages the casing.

5. In a latch of the character described, a latch bolt slidably mounted for movement back and forth along a first axis, a Aspindle slidably mounted for movement back and forth along a second axis at 90 to the first axis to move the latch bolt; and means for latching the spindle against sliding movement including a button mounted for rotation on the spindle and having a toothed extension thereon, a sleeve having a toothed end thereon engaged cooperatively with the toothed extension, a spring pressing said toothed end and toothed extension into engagement, a sleeve within said spindle and rotatable therewith, said sleeve having a notch adapted to fit over and pass the latch bolt. y

6. In a latch of the character described, a latch bolt slidably mounted for movement back and forth along a first axis and having one end adapted to engage a keeper plate and its other end formed with a projecting tongue and with a cam; a spindle slidably mounted for movement back and forth along a second axis at 90 to the first axis to move the latch bolt; means for locking the spindle against sliding movement including a sleeve rotatably supported by the spindle and having a notch formed therein cooperatively adjacent said projecting tongue and a terminal face thereon cooperatively adjacent said cam, said sleeve being rotatable selectively between a position in which the spindle is free to slide and another position in which the notch in the sleeve is engaged with the tongue on the other end of the latch bolt to prevent the spindle from sliding axially and the terminal face is engaged with the cam for movement thereby.

7.111 a latch cf the character described, a latch bolt slidably mounted for movement back and forth along a first axis and having one end adapted to engage a keeper plate and its other end formed with a locking means, a spindle slidably mounted for movement back and forth along a second axis at 90 to the first axis to move the latch bolt; means for locking the spindle against sliding movement including a sleeve rotatably mounted within the spindle and rotatable selectively between one position in which the sleeve is engaged with the locking means on the other end of the latch bolt to prevent the spindle from sliding axially and another position in which the spindle is free to slide; a cam on an end of the latch bolt, and a cooperating cam on said sleeve and engagedwith the cam on the latch bolt when the sleeve is in latch bolt locking position, said cams being effective to rotate the sleeve upon sliding of the latch bolt.

8. In a latch of the character described, a latch bolt slidably mounted for movement back and forth along a first axis and having one end adapted to engage a keeper plate and its other end formed with an extension to provide a locking means; a spindle slidably mounted for movement back and forth along a second axis at 90 to the iirst axis to move the latch bolt; means for locking the spindle against'sliding movement including a sleeve rotatably mounted on and;

engaged with the extension on the end of the latch bolt to prevent the spindle from sliding axially; and cam means provided on the end of the latch bolt and on the sleeve for rotating the sleeve from the second position to the rst position vupon sliding of the latch bolt when the spindle 'is locked.

CHARLES W. LANG.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS