US3866269A

US3866269A - Door security lock

Info

Publication number: US3866269A
Application number: US379420A
Authority: US
Inventors: Earnest C Hudgins
Original assignee: Individual
Current assignee: Individual
Priority date: 1973-07-16
Filing date: 1973-07-16
Publication date: 1975-02-18
Anticipated expiration: 1992-02-18

Abstract

A security lock for attachment to an outwardly opening hinged door to prevent opening of the door from the hinged side by removing the hinge pins. The lock comprises two separate interlocking members, one being an elongated tubular member which is inserted in a hole drilled in the door jamb, and the other being a fixed projecting pin mounted on an angled support plate attached to the door adjacent the hinged side thereof, in a position in which the outer end of the pin is received within the tubular member when the door is in its closed position, and removed therefrom when the door is opened.

Description

United States Patent 11 1 Hudgins DOOR SECURITY LOCK [76] Inventor: Earnest C. Hudgins, 1050 NW.

First Ave., Boca Raton, Fla. 33432 22 Filed: July 16, 1973 21 Appl. No.: 379,420

[52] US. Cl. 16/128 [51] Int. Cl E05d 9/00 [58] Field of Search 16/137, 135

[56] References Cited UNITED STATES PATENTS 167,576 9/1875 Skidmore 16/137 1,111,135 2/1914 Carlson ..16/137 1,442,731 l/l923 Ohnstrand 16/135 1,770,612 7/1930 Gullicksen 16/191 2,664,601 1/1954 Meinol 16/137 1 Feb. 18,1975

Primary ExaminerPaul R. Gilliam Assistant ExaminerDoris L. Troutman Attorney, Agent, or Firm-Harry N. Schofer [57] ABSTRACT A security lock for attachment to an outwardly opening hinged door to prevent opening of the door from the hinged side by removing the hinge pins. The lock comprises two separate interlocking members, one being an elongated tubular member which is inserted in a hole drilled in the door jamb, and the other being a fixed projecting pin mounted on an angled support plate attached to the door adjacent the hinged side thereof, in a position in which the outer end of the pin is received within the tubular member when the door is in its closed position, and removed therefrom when the door is opened.

4-Claims, 9 Drawing Figures 1 DOOR SECURITY LOCK BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a door security lock, and more particularly to a security lock for attachment to an outwardly opening hinged door to prevent opening of the door from the outside merely by removing the hinge pins.

In some areas of the-country, especially in those areas subject to hurricanes, it is a common practice to mount the hinges on outside doors to open outwardly,-to prevent the hurricane winds from blowing the door inwardly. Such a door mounting places the hinge pins on the outside, in a position in which the pins can readily be removed, and the door can be easily swung open at the hinged end in spite of the usual locking devices at the other end of the door.

2. Description of the Prior Art The prior art, in the most part, seeks to solve this problem by providing interlocking means between the two plates of the hinge, Attempts have also been made to apply interlocking members on the door and on the door jamb, but as a rule they are cumbersome and complex.

SUMMARY OF THE INVENTION It is an object of this invention to provide a novel security lock for a hinged door that can be applied to existing installations and does not call for the removal and replacement of the existing conventional hinges.

It is a further object of this invention to provide a novel security lock for a hinged door that is simple in construction, economical to manufacture, efficient in operation, and which'can readily be installed by unskilled workers.

The attainment of the above objects, as well as additional objects and advantages, is accomplished by a pair of separate interlocking members, one member being attached to the door adjacent the hinged end and including a projecting pin, and the other member including an elongated tubular sleeve adapted to be received within a hole formed in the door jamb, the two parts being so mounted that the projecting end of the pin is received within the tubular sleeve when the door is in itsclosed position, and removed therefrom when the door is opened.

Four preferred forms of the invention are disclosed in this specification. In the first form, a fixed projecting pin is mounted on the end of one section of an angled support plate, another section of the support plate having attachment receiving means in the form of openings to receive screws to attach the plate to a door. In all forms of the invention, an elongated tubular sleeve is received within a hole formed in the door jamb to receive the projecting end of the pin when the door is in its closed position.

In a second form of the invention, the angled support plate has three 90 angles forming four sections. The projecting pin is mounted on the face of one of said sections, said one section joining a second section extending at an angle of 90 from the face thereof serving as a support base, and joining a third section also extending at 90 from the face thereof, adapted to contact the door, functioning as a reinforcing means. The second section joins with a fourth section, extending at an angle of 90 from the face of the second section and parallel with the first section, the second and fourth sections adapted to engage the inside face and the edge of the door, respectively, the fourth section having attachment receiving means in the form of holes for receiving screws for attachment of the plate to the door.

A third form of the invention comprises a plate having a pair of parallel spaced angles, forming a middle section and a pair of parallel end sections, disposed at 90 angles relative to the middle section and extending in opposite directions, forming generally a Z in cross section. A locking pin projects from the face of one of the end sections, while the other end section and the middle section are adapted to engage the edge and inside face of the door, respectively, the other end section having attachment receiving means in the form of holes for receiving screws for attachment of the plate to the door.

A fourth form of the invention comprises an elongated pin having a coaxial bore to receive a screw for attachment of the pin to the edge of the door.

BRIEF DESCRIPTION OF THE DRAWINGS For a clearer understanding of the construction and operation of the invention, reference is made to the following detailed description of four preferred embodiments in conjunction with the annexed drawings, in which: I

FIG. 1 is a top plan view of a first embodiment of the invention;

FIG. 2 is an elevation view of said first embodiment attached to be a hinged door with the projecting end of the pin engaging a tubular sleeve inserted in the door jamb;

FIG. 3 is a cross section takenon the line 3-3 of FIG. 2 looking in the direction of the arrows;

FIG. 4 is a side view of a second embodiment;

,FIG. 5 is an elevation view of the embodiment shown in FIG. 4;

FIG. 6 is a top plan view of the embodiment of FIG.

FIG. 7 is an elevation of a third embodiment;

FIG. 8 is a side view of a fourth embodiment; and

FIG. 9 is an end-view of the embodiment of FIG. 8 as seen on the 9-9 of FIG. 8, looking in the direction of the arrows.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the annexed drawings, and particularly to FIGS. 1, 2 and 3 illustrating a first embodiment of the invention, the security lock is designated in its entirety by the numeral 10, and comprises a first interlocking member 12 adapted for attachment to the inside face of the door adjacent the hinged end, as shown in FIG. 2, and a second interlocking member 14 adapted for attachment to the door jamb as shown in FIG. 2.

The first interlocking member 12 comprises an angled support plate 16 having a angle 18 formed therein defining a first section 20 and a second section 22. An elongated pin 24 is attached by welds 26 to the outer edge 28 of the firstsection 20, one end of the pin projecting well beyond the end of the plate 16. The second section 22 includes attachment receiving means in the form of a pair of spaced counterbored holes 30 to receive a pair of screws for attaching the first interlocking member 12 to the inside face of a door 32 adjacent the hinged end thereof in such a position that the projecting end of the pin 24 extends beyond the door as shown in FIG. 2. The door 32 is mounted on hinge means 34 to swing outwardly as indicated by the arrow in FIG. 2, which arrangement disposes the hinge pins on the outside of the door in a position where the pins can easily be removed.

The second interlocking member 14 comprises an elongated tubular sleeve 36 adapted to be received within a drilled hole 38 in the door jamb 40 in a position to receive the projecting end of the pin 24 when the door is in its closed position as shown in FIG. 2.

It will be noted, from an inspection of FIG. 2, that the projecting end of the pin 24 is received within the tubular sleeve 36 when the door is closed, thus preventing the outward swinging of the hinged end of the door 32 when the hinge pins of the hinges 34 are removed from the outside, yet permitting the end of the pin 24 to swing in a circle out of engagement with the sleeve 36 when the door is opened.

A second embodiment of the invention is illustrated in FIGS. 4, and 6, in which the security lock is designated in its entirety by the numeral 42 and comprises a first interlocking member 44 and a second interlocking member 46. y

The first interlocking member 44 comprises an angled support plate 48, having a first 90 angle 50, a second 90 angle 52 parallel with and spaced from the angle 50, and a third 90 angle 54 disposed at right angles with the angle 50, the angles forming a first section 56, a second section 58, a third section .60, and a fourth section 62. The angles '50 and 54 are contiguous to the first section 56, wherebythe

sections

58 and 62 join directly with the section 56, and the angle 52 is contiguous with the section 58, whereby the

sections

58 and 62 are directly joined.

As seen in FIG. 5, the section 62 includes attachment receiving means in the form of a pair of spaced, countersunk, holes 64 to accommodate a pair of screws for attachment of the support plate 48 to the hinged end of a door 68, the section 58 being adapted to be received in a rabbeted portion of the face of the door adjacent the hinged end as seen in FIG. 4. A pin 66 is secured, at one end, to the face of the section 56, the pin being elongated to project beyond the outer extremity of the section 58 and the hinge 70 when attached to the door as described above. The section 60, as seen in FIG. 4, is in the form of a truncated right triangle with the base thereof in contact with the face of the door 68 when attached as described. In this position, the section 60 serves as a brace or reinforcing means to prevent the pin carrying section 56 from bending backwards if someone should remove the hinge pins and attempt to force the hinge end of the door 68 outwardly in the direction indicated by the arrow in FIG. 4.

The second interlocking member 46 comprises an elongated tubular sleeve 72 adapted to be inserted within a hole 74 drilled in the door jamb. 76 in a position to receive the projecting end of the pin 66 when the door 68 is in its closed position as shown in FIG. 4.

FIG. 7 illustrates a third embodiment of the invention in which the first interlocking member 78 comprises an angled support plate 80 having a pair of spaced, parallel,

angles

82 and 84, each angle being 90 with reference to the three sections so formed, that is, a first or end section 86, a second or a middle section 88, and a third or end section 90, the

sections

86 and 90 being parallel and extending in opposite directions from the second section 88, whereby the plate may be generally termed a Z in cross section. The first or end section 86 carries a projecting pin 92, which pin, similar to the projecting pins in the previously described modifications, projects beyond the outer end of the middle or second section 88 to a position to be received within an elongated tubular sleeve. The third section 90 is pierced with attachment receiving means in the form of g a pair of spaced countersunk holes 94 adapted to receive screws for attachment of the interlocking member 78 to the hinged edge of a door 96.

FIGS. 8 and 9 illustrate a fourth embodiment of the invention in which the security lock is designated in its entirety by the numeral 98 and comprises a first interlocking member 100 and a second interlocking member 102.

The first interlocking member 100 comprises an elongated projecting pin 104 having attachment receiving means in the form of a coaxial bore 106 adapted to receive an attaching screw 108 for fastening the pin 104 to the hinged end of an outwardly opening door 110 hinged at,112 for swinging outwardly in the direction indicated by the arrow in FIG. 8.

The second interlocking member 102 comprises an elongated tubular sleeve 114 adapted to be received within a drilled hole 116 in the door jamb 118, in such a position as to receive the projecting pin 104 when the door is in its closed position as shown.

It is evident, from the construction illustrated in FIG. 8, that itis impossible to open the door from the hinged end when the door is closed, merely by removing the hinge pins.

I claim:

1. A security lock for a hinged door, comprising: a pair of separate interlocking members for separate attachment to a door and to a door jamb, respectively, one of said members having a fixed projecting pin and attachment receiving means for attaching said member to the hinged end of a hinged door, and the other member comprising an elongated tubular sleeve adapted to be received within a hole, in the door jamb to receive the end of said pin when the door is in its closed position, said one member including an angled support plate having at least two sections, each section disposed at 90 relative to an adjoining section, said pin being attached to one of said sections, and another section including said attachment receiving means, and a third section extending at a 90 angle from said pin carrying section and contacting the door when the said one of said interlocking members is secured thereto, whereby said third section serves as a reinforcing section for said pin carrying section, said third section lying in a plane disposed at right angles to said other sections.

2. A security lock for a hinged door as defined in claim 1, in which said projecting pin is attached to an end of one of said sections remote from the angle I therein.

3. A security lock for'a hinged door as defined in claim 1, in which two of said sections are connected with said pin receiving section, each of said pin receiving sectionand said two sections connected therewith being mutually disposed at angles with each other,

and the fourth of said sections being connected with the end of one of said two sections remote from said pin receiving section and disposed parallel with said pin receiving section.

6 ing from the middle section, said pin being attached to the face of one of said end sections, and the other end section including said attachment receiving means.

Claims

1. A security lock for a hinged door, comprising: a pair of separate interlocking members for separate attachment to a door and to a door jamb, respectively, one of said members having a fixed projecting pin and attachment receiving means for attaching said member to the hinged end of a hinged door, and the other member comprising an elongated tubular sleeve adapted to be received within a hole, in the door jamb to receive the end of said pin when the door is in its closed position, said one member including an angled support plate having at least two sections, each section disposed at 90* relative to an adjoining section, said pin being attached to one of said sections, and another section including said attachment receiving means, and a third section extending at a 90* angle from said pin carrying section and contacting the door when the said one of said interlocking members is secured thereto, whereby said third section serves as a reinforcing section for said pin carrying section, said third section lying in a plane disposed at right angles to said other sections.

2. A security lock for a hinged door as defined in claim 1, in which said projecting pin is attached to an end of one of said sections remote from the angle therein.

3. A security lock for a hinged door as defined in claim 1, in which two of said sections are connected with said pin receiving section, each of said pin receiving section and said two sections connected therewith being mutually disposed at 90* angles with each other, and the fourth of said sections being connected with the end of one of said two sections remote from said pin receiving section and disposed parallel with said pin receiving section.

4. A security lock for a hinged door as defined in claim 1, in which said angled support plate includes two parallel angles forming three sections, one being a middle section and two end sections, the two end sections being parallel with one another and oppositely extending from the middle section, said pin being attached to the face of one of said end sections, and the other end section including said attachment receiving means.