US3157041A

US3157041A - Lock construction for lock sets

Info

Publication number: US3157041A
Authority: US
Inventors: Alma M Fryer
Original assignee: Newfrey LLC
Current assignee: Newfrey LLC
Priority date: 1961-11-27
Filing date: 1961-11-27
Publication date: 1964-11-17
Anticipated expiration: 1981-11-17

Description

K. F. FRYER LOCK CONSTRUCTION FOR LOCK SETS Nov. 17, 1964 2 Sheets-Sheet 2 Filed Nov. 2'7, 1961 INVENTOR. KENNETH Ffierse, QECEASEQ. By ALMA M Hem-2, EXECUTE/X United States Patent 3,157,041 LOCK CONSTRUTION FOR LOCK SETS Kenneth F. Fryer, deceased, late of Anaheim, Calif., by Alina M. Fryer, executrix, Anaheim, Calif., assignor to Emhart Corporation, a corporation of Connecticut Filed Nov. 27, 1961, Ser. No. 156,192 Claims. (Cl. 70-216) This invention relates to a locking construction for lock sets and, more particularly, to a locking construction which is adapted to be utilized in conjunction with cylinder or other types of locks.

In conventional locking constructions utilized with cylinder locks it is necessary to rotate the plug of the cylinder a full 360 to lock or unlock the cylinder lock in order that the key may with Withdrawn from operative relationship with said plug. Therefore, the user of the lock is compelled to completely rotate the plug each time he locks or unlocks a door in which the cylinder lock is installed.

While the teachings of the invention are disclosed as utilized in conjunction with a cylinder lock, it will, of course, be obvious to those skilled in the art that analogous types of locks may be utilized in conjunction with the locking construction of the invention and it is not intended to limit the locking construction of the invention to any particular type of lock, as will become apparent hereinbelow.

It is, therefore, an object of my invention to provide a locking construction for a lock set which is characterized by the fact that, when the locking construction is operated to cause the looking or unlocking of the door, it is only necessary to rotate the key and the associated plug of the cylinder lock 90 in the desired direction to lock or unlock the door. After 90 rotation, reverse rotation of 90 will permit the key to be withdrawn from the associated plug thus eliminating the necessity for 360 rotation characteristic of conventional locking constructions.

In lock sets which must be positively locked or unlocked from the exterior side thereof, such as schoolroom lock sets, the necessity for 360 rotation of the plug of the cylinder lock to lock or unlock the associated locking construction results in an undue expenditure of time to accomplish the locking or unlocking operations.

Another object of my invention is the provision of a locking construction particularly adapted for utilization in locks such as schoolroom locks, which must be positively locked to avoid the possibility that the schoolroom door may be inadvertantly locked by a child or other user of the room. An associated object of my invention is the provision of a locking construction of the aforementioned character which eliminates the necessity for the complete rotation of the cylinder plug each time the schoolroom lock is locked or unlocked in order that the key may be withdrawn from operative association with said plug.

A further object of my invention is a locking construction for lock sets which is adapted to be mounted in the hollow spindle of the lock set and which includes a locking dog and a cam actuator for said dog adapted to engage or release said dog from a mount for said spindle to accomplish the looking or unlocking, respectively, of the lock set with which the locking construction is associated.

Another object of my invention is a locking construction of the aforementioned character which is adapted to be utilized in conjunction with a cylinder lock and which incorporates a lost motion connection which permits the locking construction to be locked or unlocked by 90 rotation of the cylinder lock plug and which permits withdrawal of the key from said plug by reverse 90 3,157,041 Patented Nov. 17, 1964 rotation. Thus, the necessity for 360 rotation of the plug to withdraw the key therefrom is eliminated.

Other objects and advantages of the invention will be apparent from the following specification and the accompanying drawings which are for the purpose of illustration only, and in which:

FIG. 1 is a perspective view of a section of a schoolroom lock set incorporating the locking construction of the invention;

FIG. 2 is a longitudinal, sectional view taken on the broken line 22 of FIG. 1;

FIG. 3 is a fragmentary, sectional view showing the locking construction in its inoperative, unlocked condition;

FIG. 4 is a view similar to FIG. 3 showing the locking construction in its locked, operative position;

FIG. 5 is a vertical, sectional view taken on the broken line 5-5 of FIG. 3;

FIG. 6 is a vertical, sectional view taken on the broken line 66 of FIG. 4;

FIG. 7 is a vertical, sectional view similar to FIG. 5 but showing the cam actuator in a different position;

FIG. 8 is an exploded view showing the major components of the locking construction;

FIG. 9 is a perspective view showing the positions of the components when the locking structure is inoperative; and

FIG. 10 is a view similar to FIG. 9 showing the components in operative positions.

. Referring to the drawings and particularly to FIGS. l4 thereof, I show a schoolroom lock set 10 which includes a bolt case 12 incorporating a bolt 14, said bolt case being connected to a retractor slide housing 16. The retractor slide housing 16 incorporates spindle bearing plates 20, one of which is adapted to mount an exterior, tubular spindle 22 in a bearing 24 provided upon the bearing plate 20. The tubular spindle 22 has an exterior knob 26 mounted upon the outer extremity thereof and is provided with a rollback 28 adapted to engage a retractor slide 30 and, upon rotation of said spindle to retract said slide against the bias of a compression spring 32, to cause the retraction of the bolt 14 in a manner well-known to those skilled in the art.

A cylinder lock 40 of substantially standard construction is mounted in the outer extremity of the spindle 22 and includes a rotatable plug 42 supported in a housing 44 and having a face plate 46 mounted thereupon. The plug 42 is adapted to receive a key 48 in a keyway 52 in order that rotation of said plug and an actuator blade 54 connected thereto may be accomplished, in a manner to be described in greater detail below.

Located within the spindle 22 is a locking construction 60 which is adapted, upon proper rotation of the plug 42, to lock or unlock the spindle 22 to respectively prevent or permit retraction of the bolt 14. The locking construction 60 includes a mounting cage 62 which is adapted to be slide into the spindle 22. The cage 62 incorporates substantially

circular end plates

64 and 66 maintained in operative relationship with each other by a connector bar 68. The end plate 64 is provided with a tab 72 which is engageable in a corresponding slot 74 in the spindle 22 to prevent relative rotation between said mounting cage and said spindle. The end plate 64 also includes an opening 76 having stop lobes 78 for a purpose which will be described in greater detail below. A guide aperture 62 is incorporated in the end plate 66 and a radial slot 64 is also provided therein.

Mounted for rotation in the mounting cage 62 is a cam 86 which has an elongated shank 38 thereupon located in the opening 76 and aperture 32. The extremity of the shank 38 projecting through the aperture 82. is retained in operative relationship with the end plate 66 by means of a cotter pin 92 or a similar fastener.

The cam 86 includes an arcuately formed cam surface 04 and a slot 06 adapted to receive the actuator 54 mounted in the inner extremity of the plug 42. Supported between the

end plates

64 and 66 upon the shank 88 of the cam 66 is a locking dog 102 which includes a dogging lever 104 disposed in the slot 84- and a cam follower 106. The cam follower 106 is located for movement in a slot 108 and the extremity thereof is engageable by the cam surface 94 on the cam 86, in a manner to be described in greater detail below.

A compression spring 110 is seated between the end plate 66 and a seat 112 on the locking dog 102 and is adapted to urge the locking dog 102 downwardly into the unlocked position in which the dogging lever 104 lies within the radial slot 84. An opening 114 in the seat 112 of the locking dog 102 receives the shank S3 of the cam 86 and, thus, the locking dog 102 is supported upon the shank 88 of said cam. It should be noted that the cam surface 94 terminates in a detent 114 adapted to receive the corresponding extremity of the cam follower 106.

Therefore, when the cam surface 94 is rotated to urge the dogging lever 104 outwardly into its locking position, the extremity of the cam follower 106 will drop into the detent 114 on the cam surface 94 to retain the dogging lever 104 in its locking position. If the cam follower 106 were not so retained, the bias of the compression spring 110 against the seat 112 would force the extremity of the cam follower 106 against the curvilinear cam surface 94 and return the cam to a position in which the dogging lever 104 would drop into its unlocked position within the slot 84 in the end plate 66.

The right-singularly bent extremity of the dogging lever 104 is, as best shown in FIGS. 3 and 4 of the drawings, located in a corresponding notch 11% provided in the inner extremity of the tubular spindle 22. A corresponding slot 122 is formed in the bearing 24 for the reception of the extremity of the dogging lever 104.

The assembly of the locking construction 60 in operative relationship with the hollow spindle 22 merely entails the insertion of the locking construction 60 into the outer extremity of said spindle with the tab 72 on the end plate 64 located in the slot 74 of the spindle 22. The curvilinear portions of the

end plates

64 and 66 engages the corresponding cylindrical interior wall of the spindle 22 and facilitate the sliding insertion of the locking construction 60 into the spindle 22. When the tab 72 reaches the end of the slot '74 the right-angularly bent extremity of the dogging lever 104 is urged upwardly into the notch 118 by the action of the compression spring 110.

After installation of the locking construction 60 has been completed, the cylinder lock 40 is installed in the outer end of the spindle 22 and the actuator blade 54 located in the corresponding slot 96 of the cam 36. It will be noted that, as best shown in FIGS. -7 of the drawings, the blade 54 does not fit snugly or tightly within the slot 96 in the cam 86. Therefore, as will become apparent hereinbelow, the connection between the actuator blade 54 and the cam 86 constitutes a lost motion connection which permits the blade 54 to rotate the cam 86 but which also permits relative rotation between the blade 54 and the cam 86.

The locking construction 60 is shown in its disengaged or unlocked position in FIGS. 3, 5, 7 and 9 of the drawings with the cam follower 106 located adjacent the extremity of the cam surface 94 and the dogging lever 104 disposed in the slots 84 in the end plate 66 and the slot 118 in the spindle 22. The compression spring 110 maintains the dogging lever 104 in the disengaged, unlocked position by biasing the cam follower 106 into the slot 108 in the end plate 64.

However, when the key 48 is inserted in the keyway 52 of the plug 42, and rotated counterclockwise in the direction of the arrow 124 of FIG. 5, corresponding counterclockwise rotation of the actuator blade 54 will occur causing the actuator blade 54 to impinge on the opposite edges of the slot 96 and to correspondingly rotate the cam 86 to urge the cam surface 94 against the cam follower 106. When 90 rotation of the cam surface 94 has been accomplished, the right-angularly bent cxtremity of the dogging lever 104 will be located in the slot 122 in the bearing 24 thus locking the spindle 22 to the bearing 24 and preventing relative rotation between said spindle and said bearing to prevent the bolt 14 from being drawn into the bolt case 12 and locking the associated door.

Completion of the 90 rotation of the cam surface 94' is indicated by the impingement of the shank of the cam 86 upon the left-hand stop lobe '78. When the cam surface 94 reaches the extreme limit of its locking movement the cam follower 106 drops into the detent 114 in said surface and retains the cam surface 04 in its locking position against the bias of the spring 110.

Removal of the key 43 from the corresponding keyway 52 of the plug 42 is accomplished by reverse rotation of the plug 42 and the actuator blade 5'4 in a clockwise direction, as indicated by the arrow 126 in FIG. 6 of the drawings. The lost motion relationship between the actuator blade 54 and the slot 96 of the cam 06 permits relative reverse rotation of the blade 54 into its initial position and removal of the key 48 from the keyway 52 without the necessity for 360 rotation thereof.

In order to accomplish the unlocking of the locking construction 60, the key 48 is inserted into the keyway 52 of the plug 42 with the actuator blade 54 located in the phantom position of FIG. 6 of the drawings. The plug 42 and key 43 are then rotated in a clockwise direction as indicated by the arrow 128 and in FIG. 7, to engage the actuator blade 54 on the opposite edges of the cam slot 96 and cause clockwise rotation of the cam surface 94. Clockwise rotation of the cam surface 94 initially disengages the extremity of the cam follower 106 from the associated detent 114 in said surface and subsequently rotates said cam surface into the position of FIG. 7 wherein the cam follower 106 is once again located within the slot 108 in the end plate 64 and the dogging lever 104 withdrawn from operative engagement with the slot 122 in the bearing 94.

Clockwise rotation of the cam 86 in the above described manner is limited by ultimate impingement on the side of the shank 83 of the cam 86 on the right-hand stop lobe 78. Completion of the unlocking cycle having been accomplished, the key 48 and plug 42 may be rotated in a counterclockwise direction to locate the blade 54 in the position of FIG. 5 of the drawings and permit withdrawal of the key 48 from the keyway 52 by only of reverse rotation.

Once the right-angularly bent extremity of the clogging lever 104 has been withdrawn from the slot 122 in the bearing 24, the spindle 22 may be freely rotated to permit the rollback 28 to urge the retractor slide 30 rearwardly in the retraction slide housing 16 against the bias of the spring 32. Rearward movement of the retractor slide 30 draws the bolt 14 into the bolt cage 12 and permits the door with which the lock set 10 is associated to be opened.

I thus provide a locking construction for utilization with lock sets which must be positively locked and unlocked, said locking construction being characterized by the fact that 360 rotation of the key in the lock associated with said locking construction is not necessary, withdrawal of the key being accomplished by 90 reverse rotation of the key after 90 rotation thereof to accomplish either locking or unlocking of the locking construction. Moreover, the locking construction of the invention is characterized by the fact that it may be readily installed as a unit in a slightly modified exterior, tubular spindle and, thus, the necessity for complex locking construction characteristic of the prior art is eliminated.

I claim:

1. In a locking construction, the combination of: a

housing; a knob actuating spindle in said housing; a mount located in said spindle having end plates at its opposite extremities incorporating coincident openings; a rotatable cam supported externally of one of said end plates having a shank extending through said openings and a slot on said cam engageable by a key plug; and a dog pivotally mounted upon said shank and having an end engageable by said cam and its opposite end engageable with said spindle and said housing for locking said spindle against rotation with respect to said housing.

2. In a locking construction, the combination of: a housing; a knob actuating spindle in said housing; a mount located in said spindle having end plates at its opposite extremities incorporating coincident openings; a rotatable cam supported externally of one of said end plates having a shank extending through said openings and a slot on said cam engageable by a key plug; a dog pivotally mounted upon said shank and having an end engageable by said cam and its opposite end engageable with said spindle and said housing for locking said spindle against rotation with respect to said housing, said dog having a spring seat thereupon; and a spring encompassing said shank and interposed between one of said end plates and said seat for biasing said other end out of engagement with said housing.

3. In a lock construction, the combination of: a housing; an elongated hollow spindle; a lock in said spindle having a key plug; a support mounting said spindle for rotation; a mount in said spindle having spaced openings therein; a cam having a key plug engageable opening and an elongated shank mounted for rotation in said openings; and a dogging lever mounted on said shank having one end engageable by said cam and the other end engageable with said support to lock said spindle against rotation with respect to said support.

4. In a lock construction, the combination of: a housing; an elongated hollow spindle; a lock in said spindle having a key plug; a support mounting said spindle for rotation; a mount in said spindle having spaced openings therein; a cam having a key plug engageable opening and an elongated shank mounted for rotation in said openings; a dogging lever mounted on said shank having one end engageable by said cam and the other end engageable with said support to lock said spindle against rotation with respect to said support; and a spring encompassing said shank and engageable with said lever to withdraw said one end of said lever from locking engagement with said support.

5. In a lock construction, the combination of: an elongated hollow spindle; a support mounting said spindle for rotation; a mount in said spindle having spaced end plates thereupon incorporating coincident openings; a cam rotatable upon one of said end plates having a key plug engageable opening and a shank extending through said openings; and a dogging lever having an opening therein through which said shank extends to mount said lever between said plates, said dogging lever having a cam lobe thereupon engageable by said cam and having an extremity engageable with said support to lock said spindle against rotation with respect to said support.

References Cited in the file of this patent UNITED STATES PATENTS 1,060,251 Hagstrorn Apr. 29, 1913 1,446,085 Falk Feb. 20, 1923 2,694,919 Fisler et al Nov. 23, 1954 2,738,666 Tornoe Mar. 20, 1956 2,976,714 Hofgesang Mar. 28, 1961

Claims

3. IN A LOCK CONSTRUCTION, THE COMBINATION OF: A HOUSING; AN ELONGATED HOLLOW SPINDLE; A LOCK IN SAID SPINDLE HAVING A KEY PLUG; A SUPPORT MOUNTING SAID SPINDLE FOR ROTATION; A MOUNT IN SAID SPINDLE HAVING SPACED OPENINGS THEREIN; A CAM HAVING A KEY PLUG ENGAGEABLE OPENING AND AN ELONGATED SHANK MOUNTED FOR ROTATION IN SAID