US3161036A - Latch - Google Patents

Description

Dec. 15, 1964 J. M. HIMES r-:TAL 3,161,036

LATCH Filed May 14, 1962 2 Sheets-Sheet 1 l A afgfpvm:

Ty, 35 35% s INVENTORS Hmes RALPH ARMS Fm l Fler. M-

TTORNEY JOHN Dec. l5, 1964 J. M. HlMEs ETAL LATCH F`\ ca. q

INVENTRs Jos-m M. HMES RALPH F. GARMS HUM. 'ATToRNeY Filed May 14, 1962 United States Patent O 3,161,036 LATCH John M. Himes, Hartford, and Ralph F. Garnis, Brookfield, Wis., assignors to E. R. Wagner Manufacturing Company, Milwaukee, Wis., a corporation of Wisconsin Filed May 14, '1962, Ser. No. 194,396 '15 Claims. (Cl. '7d-150) This invention relates to door latches and particularly latches for temporary type doors such as screen and storm doors. i

Handles for doors of this type are generally latched on the inside and interconnected through a solid connection so that they can be opened by a push yor pull motion from the inside or outside of the door. A l-ock is provided on the inside handle which can be locked and released only from the inside. When excessive force is applied to the outside handle, there is a tendency through the solid connection between the inside and outside handles to damage the handle and the lock.

The principal object of this invention is to provide a latch and lock for a temporary type door which overcornes these objections. Another object of this invention is to provide a latch that can be sold as a do-it-yourself type item.

A further object is to provide a latch and lock that is substantially tamper-proof.

A still further object is to provide a latch and lock arrangement that cannot be overstressed.

These objects are accomplished by interconnecting the inside and outside handles by means of a loop type Wire spring. The spring has its free ends bent to engage a manually rotatable lock cylinder in the inside handle and the looped end encircles a freely movable pin in the base for the outside handle. The pin is retained in the base by a semi-cylindrical pin retainer that cannot be removed from the outside handle when the latch is locked. The manually rotatable lock cylinder is rotated in the inside handle to lock the latch and is axially movable to relieve any stress on the spring link when the inside handle is pushed and the outside handle is prevented from moving. The latch can be adapted to be locked from the outside by mounting a key lock cylinder Within the outside handle which engages the lpin in the looped end of the wire spring. Rotary motion of the key lock cylinder is transferred to the manually rotatable cylinder by the spring. The latch and lock can then be locked and unlocked from both the inside and outside of the door.

Other objects and advantages will be pointed out in or be apparent from the speciiication and claims, as will obvious modilications of the two embodiments shown in the drawings in which:

FIG. 1 is a front view of the outside handle;

FIG. 2 is a view taken on line 2 2 of FIG. l showing the connection between the inside and outside handles;

FIG. 3 is a View taken on line 3*-3 of FIG. l showing the mounting of the inside and outside bases and the connection between the inside and outside handles;

FIG. 4 is a view of the inside handle;

FIG. 5 is a view showing the actuation of the inside and outside handles when the door is to be opened;

FIG. 6 -is a view showing the action of the manual lock cylinder in the inside handle when the outside handle is prevented from moving;

FIG. 7 is a side view of the lock cylinder and lock tab in a neutral position;

FIG. 8v is a view taken on line 8-8 of FIG. 7 showing the lock tab in the neutral position;

FIG. 9 is a view similar to FIG. 8 showing the lock tab turned to the lock position;

FIG. 10 is a view taken on line itl-1d of FIG. 6 show- ICC ing the web and pin retainer holding the spring link pin in position in the outside handle;

FIG. 11 is a view of an alternative type of spring retainer holding the pin in position;

FIG. l2 is a side view of a key lock cylinder in the outside handle;

FIG. 13 is a view taken on line 13-13 of FIG. 12;

FIG. 14 is a view taken on line 1li-14 of FIG. 12; and

FIG. 15 is a view of the adaptor.

Referring speciiically to the drawings, the handle and lock arrangement contemplated herein includes an inside base 10 and an outside base 12 interconnected through door 14 by bolts 16 mounted from the inside of the door. An inside or push handle 18 is pivoted on pin 20 in the inside base and has a front cam surface 21 which acts against spring biased pin 22 mounted in bracket 24 on door frame 26 when the door is closed and a catch surface 28 which engages the pin to hold the door closed.

A manually rotatable lock cylinder 30 is inserted into hole 32 in the inside handle with actuator tab 36 aligned with the outer surface of the handle. The tab is contoured to form a continuation of the handle when in the unlocked position and is used to rotate the cylinder lto the locked position. An inside lock tab 34 is provided at the inner end of the lock cylinder and engages slot 35 in the inside base member when the cylinder is rotated to the locked position. The lock cylinder is inserted into the push handle by aligning the lock tab with groove 38 and inserting the cylinder through the handle until it engages edge 40 in the push handle.

The push handle is connected to an outside or pull handle 42 pivoted on pin 44 in the outside base member by means of a spring link 46 that extends through holes 48 in the door. The free ends 50 of the spring link are aligned within slot 52 in the cylinder and are bent to engage groove 55 in the cylinder. With this arrangement'the spring link cannot be pulled axially out of the cylinder but can be rotated around surface 54 and removed from the cylinder. Normally the spring link will be permanently mounted in the cylinder by swedging the inside surfaces of the slot, generally shown at 56, against the free ends of the spring.

The looped end 58 of the spring link extends into hole 6i) in the pull handle and is held therein by dropping pin 62 into the loop. A web 64 is provided on the end of the hole to prevent the pin from being pulled out of the hole. The pin is dropped into the loop through a semi-circular opening in the end of the hole in the push handle and is retained in the handle by a pin retainer 68 mounted on the handle by screw 70. A leaf spring 72 (FIG. ll) which is bent at its ends to snap into grooves 74 in the sides of the handle could also be used to hold the pin in position if desired. The pin is therefore free to rotate to a lock position with the spring link when the manually rotatable cylinder is rotated to a locked position but cannot be moved axially in the hole in the handle.

The spring link provides the bias for holding and returning the handles to the initial or at rest position. As seen in comparing FIGS. 2 and 5, the spring link is normally bent slightly on contoured surface 76 to provide a slight return force on the handles. When the handles are moved to open the door, the bend in the spring will increase thereby increasing the return force on the handles. Surface 76 relieves the bending force on the spring so that it will not be overstressed when the handles are pushed to a fully open position.

Referring to FIG. 6, if the outside handle should be prevented from rotating for any reason, depressing of the push handle will not overstress the spring link since the manually rotatable cylinder is free to move axially in the hole inthe push handle.

If the latch and lock is to be used without a lock, a plug 7S is supplied which tits loosely in groove 80 on the outer end of hole 60. The plug is set rigidly in position by striking the outer domed surface of the plug with a hammer or blunt instrument which will cause the plug to expand and seat in the groove. If an outside lock is to be used (FIGS. 12-15), a lock plug adaptor 82 is inserted into the hole in the outside handle until pin 62 is aligned in groove 84 in the adaptor. A conventional lock cylinder 86 is inserted into the hole in the push handle with pin 96 inserted into arcuate slot 98 in the adaptor and spring biased disc 88 seated on surface 90 in the handle. The normal lock tabs 92 are aligned in grooves 94 and are drawn into the lock cylinder when a key is inserted into the lock for rotating the lock in the handle.

The motion of the lock cylinder is transferred to the adaptor by pin 96 which engages the ends of the arcuate slot 98 to rotate the pin and spring link. Rotation of the spring link will also rotate the manually rotatable cylinder locking the push handle to the hase. The push handle can be released from the inside base by rotating either one of the cylinders. Since the lock cylinder is locked in position when the key is removed, the arcuate slot inthe adaptor is made long enough to allow the adaptor 'to rotate freely with respect to the lock cylinder when the spring link is rotated. If this were not provided for, the spring link would return the lock cylinder to the neutral position whenever it was rotated by the manually rotatable lock cylinder.

The outside lock assembly is completely tamper-proof. The pin retainer which is held in position by an exposed screw is provided with semi-cylindrical sections 100 which engage the edges of recess 102 in the outside base when the push handle is locked in the neutral position. If the latch is locked it will be impossible to remove the pin retainer from the handle. The same relationship is also provided by the spring type retainer of FIG. 11. A detent action is built into the manual lock cylinder by providing bead 104 in the hole in the push handle and grooves 166 in the manual lock cylinder. A deni'te click feeling will occur when the cylinder is turned in either direction thereby defining the limits of motion in both directions.

In assembling the latch and lock device the push and pull handles generally are pivotally mounted on 4the bases at the factory. The bases are mounted on the door by inserting screw bolts 16 through holes in the inside base and into threaded holes 114 in the outside base. The manually rotatable lock cylinder with the spring link mounted therein is then inserted into the push handle with the looped end of the spring link passing through the door and into the pull handle. The spring link pin is dropped into the loop at the end of the spring link behind web 64 in the push handle to hold the spring link in position. The spring retainer is mounted on the pull handle to hold the pin in position for free rotation within the handle. Depending on whether an outside lock is to be used on the door or not, the hole in the handle is then closed by either the plug or the lock cylinder arrangement.

Although only two embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various changes and modilications may be made therein without departing from the spirit of the invention or from the scope of the appended claims.

We claim:

l. A lock for a temporary type door comprising,

an inside base and an outside base adapted to be mounted on the door,

a push handle pivotally mounted on the inside base,

a pull handle pivotally mounted on the outside base,

a manually rotatable lock cylinder mounted in said push handle,

a lock actuator rotatably mounted in the pull handle,

and spring means connected through the door to the lock cylinder and lock actuator and providing a bias to an initial position for both handles.

2. A lock according to claim 1 wherein said lock cylinder includes means for engaging the inside base -to lock the push handle to the inside base.

3. A lock according to claim 2 wherein said lock actuator is key operated, the motion of the actuator being transferred to the lock cylinder by the spring means to lock and unlock the lock cylinder with respect to the base.

4. A lock according to claim 1 wherein said lock cylinder is free to move axially within the push handle and is limited only by the spring means whereby actuation of the push handle when the pull handle is restrained from movement will not overstress the spring means.

5. A lock for a temporary type door comprising,

an inside base and an outside base adapted to be interconnected through the door,

a push handle pivotally mounted on the inside base,

a pull handle pivotally mounted on the outside base,

a looped type spring link for biasing the handles to a normal position,

manually krotatable lock means mounted in the push handle and connected to one end of the spring link,

and rotatable means for holding the other end of the spring link in the pull handle so that the motion of the pull handle is transferred to the push handle.

6. A lock according to claim 5 wherein said rotatable means comprises a pin inserted through a hole in the pull handle and passing through the spring link and cylindrical means mounted on the pull handle for retaining the pin in the pull handle.

7. A lock according to claim 6 wherein said outside base includes a recessed portion which cooperates with the cylindrical means to prevent the removal of said cylindrical means from the pull handle when the push handle is locked to the inside base.

8. A lock according to claim 7 wherein said cylindrical means comprises, a pin retainer having a cylindrical section shaped to close the pin receiving hole in the pull handle and secured to the pull handle by a screw.

9. A lock according to claim 7 wherein said cylindrical means comprises an arcuate spring biased to engage the pull handle and positioned to close the pin receiving hole in the pull handle.

10. A door latch comprising,

a rst handle adapted to be mounted on one side of the door and movable between door unlatching and door latching positions,

a second handle adapted to be mounted on the other side of the door and movable between door latching and door unlatching positions,

means operable to engage a catch and to thereby latch the door, said means being responsive to the movement of said rst handle to its door unlatching position to thereby disengage the catch,

and a resilient link connected to said iirst and second handles to move said first handle to its door unlatching position in response to movement of said second handle to its door unlatching position, said resilient link also biasing said irst and second handles to their respective door latching positions.

11. A door latch comprising,

a first handle adapted to be mounted on one side of the door and movable between door unlatching and door latching positions,

a second handle adapted to be mounted in the other side of the door and movable between door latching and door unlatching positions,

means operable to engage a catch and to thereby latch the door, said means being responsive to the movement of said first handle to its door unlatching position to thereby disengage the catch,

and a resilient link connected to said first and second handles to move said first handle to its door unlatching position in response to movement of said second handle to its door unlatching position, said resilient link also biasing one of said handles to its door latching position.

12. A door latch comprising, Y

a Erst handle adapted to be mounted on one side o the door and movable between door unlatching and door latching positions,

a second handle adapted to be mounted on the other side of the door and movable between door latching and door unlatching positions, Y

catch engaging means operable to engage a catch and to thereby latch the door, said means being responsive to the movement of said irst handle to its door unlatching position to thereby disengage the catch,

and a resilient link connected to said first and second handles to move said first handle to its door unlatching position in response to movement of said second handle to its door unlatching position, said resilient link also biasing said catch engaging means to a catch engaging position.

13. The subject matter of claim 12 wherein both of 5 one of said handles being pivotable towardlthe door to move in its latching position, and the other of said handles being pivotable away from the door to moveV in its latching position.

14. The subject matter of claim 13 including rotatable lockmeans mounted in one of said handles and operable to lock said catch engaging means in said catch engaging position, and rotatable lock actuating means mounted in the other of said handles, said resilient link -being operable to transfer the rotary motion of said lock actuating means to said lock means to thereby permit actuation of said lock means.

ing a loop at one end thereof, and wherein said member,

is connected to one of said handles by a pin inserted in said loop and rotatably carried by said one of said handles.

said-handles are adapted to pivot toward and away from References Cited in the tile of this patent UNITED STATES PATENTS Stettner Feb. 12, 1924 1,483,490 2,726,533 Quinn Dec. 13, 1955 2,772,107 Youngberg Nov. 27, 1956

Claims (1)

10. A DOOR LATCH COMPRISING, A FIRST HANDLE ADAPTED TO BE MOUNTED ON ONE SIDE OF THE DOOR AND MOVABLE BETWEEN DOOR UNLATCHING AND DOOR LATCHING POSITIONS, A SECOND HANDLE ADAPTED TO BE MOUNTED ON THE OTHER SIDE OF THE DOOR AND MOVABLE BETWEEN DOOR LATCHING AND DOOR UNLATCHING POSITIONS, MEANS OPERABLE TO ENGAGE A CATCH AND TO THEREBY LATCH THE DOOR, SAID MEANS BEING RESPONSIVE TO THE MOVEMENT OF SAID FIRST HANDLE TO ITS DOOR UNLATCHING POSITION TO THEREBY DISENGAGE THE CATCH, AND A RESILIENT LINK CONNECTED TO SAID FIRST AND SECOND HANDLES TO MOVE SAID FIRST HANDLE TO ITS DOOR UNLATCHING POSITION IN RESPONSE TO MOVEMENT OF SAID SECOND HANDLE TO ITS DOOR UNLATCHING POSITION, SAID RESILIENT LINK ALSO BIASING SAID FIRST AND SECOND HANDLES TO THEIR RESPECTIVE DOOR LATCHING POSITIONS.

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