US3751951A - Push-button door lock - Google Patents

Abstract

A lock device consisting primarily of three push-buttons with a projection for resetting the lock, and another button on the inside of the door that serves to release the lock with one punch.

Description

United States Patent 1191 11] 3,751,951 Gridley Aug. 14, 1973 PUSH-BUTTON DOOR LOCK 2,536,429 1/1951 Dury 70/313 1761 Invent James Robert w Andrews iiii'ili 15/132; 2211111121111 3111138153 lywaldeniN-Y- 12586 3,412,587 11/1968 Sanowskis 70/313 [22] Filed: Mar. 10, 1972 Primary Examiner-Albert G. Craig, Jr. [211 App! l88665 Attorney-Robert R. Strack and James A. Eisenman [52] US. Cl. 70/313 57 ABS C [51] lnt.Cl E051) 37/16 1 TR 58 Field of Search 70/313 A lock de Consisting Primarily of three P buttons with a projection for resetting the lock, and an- 56] References Cited other button on the inside of the door that serves to re- UNITED STATES PATENTS lease the lock with one punch. 2,029,080 1/1936 Mills 70/214 6 Claims, 10 Drawing Figures Z T 26 3/ 4 53 1/ 1 1 I I I 1 l 32 /2 Z2 1 5 Z 9 /3 PAIENIEUM 4W5 3.751.951

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sum 5 OF 5 INVENTOR. J. ROBERT GR/DLE Y PUSH-BUTTON DOOR LOCK This invention relates to door locks, and more particularly to a push-button door lock.

It is therefore the primary purpose of this invention to provide a push-button door lock which will have the unique and novel feature of having a trigger bar that will be movable laterally by consecutive correct punches until it releases the bolt which will then be moved into the open-door position by an internal spring arrangement.

Another object of this invention is to provide a pushbutton lock of the type described which will utilize three push-buttons, plus a knob that will serve as a rest, the device also including another button on the inside of the door that will release the lock with one punch.

Another object of this invention is to provide a lock of the type described which will be of such construction that in the event an incorrect punch has been effected, the lock may not be unlocked without first actuating a reset knob.

A further object of this invention is to provide a lock of the type described which will be of such inherent structure, that the lock may be placed in the full lock position from either side of the door.

A still further object of this invention is to provide a lock of the type described which will be of such structure as to render it extremely unlikely that a person not familiar with the double purpose of the reset bolt projecting knob, could solve the combination and a person knowing this double purpose will still find the combination exremely difficult to solve.

An even further object of this invention is to provide a lock of the type described which, by having only three buttons, may be readily opened in the dark. The combination is easy to remember and there are thirty-six feasible combinations, thus rendering it quite adequate for ordinary door use.

Other objects of the present invention are to provide a push-button door lock which is simple in design, inexpensive to manufacture, rugged in construction, easy to use and efficient in operation.

These and other objects will be readily evident upon a study of the following specification and the accompanying drawing wherein:

FIG. 1 is a cut-away side view of the present invention shown in a vertical section substantially through the center of the lock;

FIG. 2 is a horizontal section taken substantially through the center of the lock and showing details of the bolt control mechanisms;

FIG. 3 is a diagramatic face view of the lock comprising the present invention;

FIG. 4 is a horizontal view showing a portion of the mechanism of FIG. I, the pins being shown in phantom lines;

FIG. 5 is an end view of FIG. 4, showing the neutral position of one of the pins;

FIG. 6 is similar to FIG. 5, but showing the pin position after a mis-punch occurs;

FIG. 7 is a side view of the bolt trigger release mechanism shown enlarged;

FIG'. 8 is similar to FIG. 7 but showing the bar member moved to released position;

FIG. 9 is a horizontal view of the knob and latch member with, the extreme position being shown in phantom lines; and

FIG. 10 is a diagramatic view showing how the pins move the trigger bar to the release position.

According to this invention, in order to lock the door 11 upon which the lock 10 is secured from a position outside, knob 16 is rotated in a clockwise direction by approximately 30. Lock I0 is mounted to door ll which aligns with jamb 12 in a well known manner. Lock 1% includes a rectangular configurated face plate I3 which aligns with the lock casing 14 on a opposite side of door- 11 and casing 14 is secured to face plate 13 by means of a plurality of bolt fasteners 15 which extend through door 11.

In order to lock the door 11 from the interior of a dwelling or the like, the knob 17 is secured to the same shaft 18 as that of the knob 16, lever 19 is operatively associated with said shaft and is received in a notch on the underside of bolt 20 and serves to move the bolt 20 into the closed position, the bolt 20 being held in a closed position by means of catches 21 and 22. Bolt 20 has its outer end inserted into the receptacle 23 secured fixedly to the door jamb l2. Catch 22 being under spring tension, engages catch 21 which is attached to bolt 20 by flat spring 24. Catch 22 is biased by spring 39 and is secured to the bolt casing by means of lug 26.

In order to unlock the door 11, push- buttons 27, 28, and 29 are pushed inwards in the correct order. The combination used in the present embodyment, is 3-222l. When a correct punch is made by the user, the corresponding pin 30, 31 or 32, contacts bar 33 which is provided with beveled notches 34, and forces bar 33 to slide a part of the way to the open position. Each punch by the user in the proper sequence, serves to move the bar 33 incrementally until catch 21 disengages the catch or latch 22 as it is allowed to move as the end of the bar is moved past the distal end of spring 24, and the bolt 20 is then moved into the unlocked position by means of spring 40 which is more clearly illustrated in FIGS. 7 and 8 of the drawing.

When a incorrect punch is made, the pins 30, 31, or 32 as the case may be, will force bar 33 downwards, rather than toward the open position, and any further punches will not result in a desired movement of bar 33, because the pins 30, 31, or 32 will not align with the beveled slots 34 in bar 33.

It is quite unlikely that any user trying to slove the combination, could make five consecutive correct punches, and he will not be aware of how to bring the bar 33 back into position for proper operation of lock 10.

Bar 33 is held in position by sufficiently firm pressure from the spring 24 of catch 21. Bar 33 is placed in correct position for unlocking at the time of locking by the action of cocking lever 19.

In the event that an incorrect punch is made causing bar 33to be in an inoperative position, a clock-wise turn of knob 16 will cause cocking lever 19 to move upwards towards bolt 20 and thus move bar 33 into the operating position. The afore mentioned movement is brought about by means of lever 19 being in contact with stop pin 36 which is rigid with casing 14, and by being slotted to loosely receive shaft 18, this resulting in upward movement when clock-wise torque is applied thereto by turning of shaft 18 by knob 16.

The above described will be more clearly seen in FIG. 3 of the drawings.

When bolt 20 moves into the unlocked position, bar 33 is forced back to the door jamb 12 end of its slot in bolt 20 by making contact with stop 37 which is readily seen in H6. 3 of the drawings. This forcing of bar 33 causes the catch 21 to assume its position for interlocking engagement with catch 22, the distal end of spring 24 being deflected by the adjacent end of bar 33 until this spring end rides over said end of bar 33. Lock may be opened from the inside of the dwelling or the like, by depressing push-button 38 which will cause catches 21 and 22 to disengage. The lock 10 may be put into lock position from the inside of a dwelling in the same manner as the outside, as knob 16 and 17 are on the same shaft 18. Knobs l6 and 17 cannot move bar 33 laterally towards the open position, because lever 19 does not contact the bar when the shaft 18 is turned counter-clock-wise as observed from the outside. It may contact bar 33 only when turned clockwise from the outside of the room position as it is in contact with stop pin 36 which causes lever 19 to move upwards.

It shall be noted that lock 10 is capable of utilizing various number character combinations by modifying the structure of bar 33.

lt will also be noted that the cam pins 30, 31, and 32 are returnable by means of coil spring 32' and latch 22 is returnable by means of spring 26 after pressure has been released from button 38.

It shall further be recognized, that lock 10 as shown in the embodyment herein, is not purposed as a highsecurity lock, but rather its structure will fill the need for a simple, and inexpensive lock that is secure from a thief who will not make a forceable entry by structural damage to the lock, door jamb and door.

What l now claim is:

l. A push-button lock for mounting on a door comprising, a bolt mounted for longitudinal translation and having a longitudinal slot therein, said bolt being biased to a retracted position, latching means for securing said bolt in an advanced position, a perforated bar disposed within said slot, and push button means operative in a direction transverse to the direction of said bolt translation to selectively engage the perforations in said perforated barand effect translation of said bar toward said retracted position, said latching means being controlled by said bar to release said bolt when said bar is moved to a preselected position.

2. A push-button lock as defined in claim 1, wherein said push button means includes a plurality of manually operable buttons having camming means projecting from the remote end thereof, and the perforations in said bar have camming surfaces selectively disposed for engagement with said camming means when operated in a predetermined sequence, to effect translation of the bar.

3. A push-button lock as defined in claim 2, wherein said perforated bar includes further camming surfaces enga'geable by said camming means when operated in other than said predetermined sequence, to laterally displace said bar.

4. A push-button lock as defined in claim 3, including lever means operative from either side of said door, coupled to said bolt to move said bolt to said advanced position.

5. A push-button lock as defined in claim 4, wherein said lever means also laterally shifts said bar back to its original position if it has previously been displaced.

6. A push-button lock as defined in claim 3, including additional push-button means on the inside of said door coupled to said latching means and operative to control said latching means to release said bolt.

Claims (6)

1. A push-button lock for mounting on a door comprising, a bolt mounted for longitudinal translation and having a longitudinal slot therein, said bolt being biased to a retracted position, latching means for securing said bolt in an advanced position, a perforated bar disposed within said slot, and push button means operative in a direction transverse to the direction of said bolt translation to selectively engage the perforations in said perforated bar and effect translation of said bar toward said retracted position, said latching means being controlled by said bar to release said bolt when said bar is moved to a preselected position.

2. A push-button lock as defined in claim 1, wherein said push button means includes a plurality of manually operable buttons having camming means projecting from the remote end thereof, and the perforations in said bar have camming surfaces selectively disposed for engagement with said camming means when operated in a predetermined sequence, to effect translation of the bar.

3. A push-button lock as defined in claim 2, wherein said perforated bar includes further camming surfaces engageable by said camming means when operated in other than said predetermined sequence, to laterally displace said bar.

4. A push-button lock as defined in claim 3, including lever means operative from either side of said door, coupled to said bolt to move said bolt to said advanced position.

5. A push-button lock as defined in claim 4, wherein said lever means also laterally shifts said bar back to its original position if it has previously been displaced.

6. A push-button lock as defined in claim 3, including additional push-button means on the inside of said door coupled to said latching means and operative to control said latching means to release said bolt.

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