GB1576485A - Door hinge - Google Patents

Description

(54) DOOR HINGE (71) We, STANMORE SPRINGS LIMITED, a British Company, of 2, Glebe Road, Hackney, London E8. 4BD, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates generally to a hinge for a door, and more particularly to a hinge of the kind used as the upper hinge for a heavy swing door.

Such hinges are known and comprise two elements, one of which is designated for attachment to the upper part of the door frame, and the other of which is in the form of a plate to be mounted on, or let into, the upper part of the door. In some hinges adjusting means are provided by which the axis about which the door swings may be moved in a direction parallel to the plane of the door when closed. The invention relates to this type of hinge, its main aim being to provide a hinge of this type which is very simple in design and construction, which lends itself easily to production by modern methods, and which is exceptionally robust and suitable for use with very heavy doors.

With this aim in mind, the invention is directed to an upper hinge for a door, comprising a body in the form of an elongate flat plate of dovetail cross-section having an integral circular boss at one corner, the axis of the boss being perpendicular to the plane of the plate, a cylindrical co-axial pin projecting from the boss, a casing of extruded section having a channel of mating dovetail shape in which the dovetail cross-section of the body is a tight sliding fit, an aperture inside and adjacent one end of the channel, a turrethead adjusting screw screwed into a tapped hole in the end of the body with its head accessible at the aperture, a dovetail-shaped block pressed into the end of the channel in the casing adjacent the head of the turrethead screw to prevent the screw-head from jumping out of the channel, the body, the casing, the adjusting screw and the block forming one element of the hinge for attachment to the upper part of the door frame, a top centre strap for fixing to the top of the door and having a circular boss depending from one corner, the axis of the depending boss being perpendicular to the plane of the top centre strap, and an outer race of a rolling bearing within the depending boss, the pin forming the inner race of the rolling bearing.

The body is preferably in the form of a metal die casting or a moulding of a synthetic plastics material, the casing being a length cut froman extruded metal or synthetic plastics section, the aperture being punched out. The rolling bearing is preferably a needle roller bearing.

A preferred embodiment of the invention will now be described by way of example with reference to the drawings accompanying the Provisional Specification, in which: Figure 1 is a part-sectional elevation of a door hinge according to the invention; and Figure 2 is an exploded pictorial view showing the five components which are to make up the hinge assembly.

Referring to the drawings, the hinge according to the invention comprises a body 11 in the form of an elongate flat plate.

The side edges 13 of the body are tapered so that the cross-section of the body is of dovetail shape. An integral circular boss 14 is formed at one corner of the body, the axis 15 of the boss being perpendicular to the plane of the body. A cylindrical pin 16 projects downwardly from the boss 14.

The body 11 is preferably in the form of a die casting or a moulding of a hard synthetic plastics material and the pin 16 is preferably of hardened and ground steel and is cast or moulded into the body so that it is firmly and accurately fixed, since it will form the inner race of a rolling bearing. A tapped hole 17 is formed in the end of the body and a slot 18 passes through the body. The purpose of these will be explained later.

A casing 19 is made from a length of extruded metal or hard synthetic plastics material. It has a flat bottom from which two strips 20 and 21 project upwardly. These have inwardly sloping sides 22 so that they form a channel of dovetail shape, in which the dovetail cross-section of the body is a tight sliding fit. The end of the channel is cut away at 23 to clear the boss 14. A rectangular aperture 24 is punched out of the floor of the channel. When assembled the dovetailshaped portion of the body is pushed into the channel in the casing and a turret-head screw 25 is screwed into the tapped hole 17, the head of the screw 25 projecting into the rectangular aperture 24. By means of a pin which can engage in holes 26 in the turret head of the screw 25 the screw may be rotated to move the body 11 with respect to the casing 19.A block 27 is of dovetail cross-section and is a press fit in the end of the dovetail-shaped channel in the casing. When it has been forced into position it is close to the turret head of the screw 25 and serves to prevent any possibility of the screw releasing itself from the aperture 24 and the channel.

The components 11, 19, 25 and 27 when assembled constitute the upper element of the hinge which is to be fitted into the upper part of the door frame. The second element of the hinge is a top centre strap 28 which is to be fitted to the top of the door. It comprises a flat plate 29 having a circular boss 30 depending from one corner. The top centre strap may also be in the form of a metal die casting or a moulding in a hard synthetic plastics material. It contains the outer race 31 of a rolling bearing containing needle rollers 32. The bearing may be packed with grease when the hinge is assembled.

The casing 19 contains four fixing screw holes 32, 33, 34 and 35. The screw which passes through the hole 34 also passes through the slot 18 and the screw which passes through the hole 35 also passes through a hole 36 in the block 27. The top centre strap 28 has three screw holes 37, 38 and 39.

From the foregoing description it will be evident that the invention provides an upper hinge for a door which is very simple in design and construction, which lends itself to modern methods of production and which is suitable for use with very heavy doors.

WHAT WE CLAIM IS 1. An upper hinge for a door, comprising a body in the form of an elongate flat plate of dovetail cross-section having an integral circular boss at one corner, the axis of the boss being perpendicular to the plane of the plate, a cylindrical co-axial pin projecting from the boss, a casing of extruded section having a channel of mating dovetail shape in which the dovetail cross-section of the body is a tight sliding fit, an aperture inside and adjacent one end of the channel, a turret-head adjusting screw screwed into a tapped hole in the end of the body with its head accessible at the aperture, a dovetailshaped block pressed into the end of the channel in the casing adjacent the head of the turret-head screw to prevent the screw-head from jumping out of the channel ,the body, the casing, the adjusting screw and the block forming one element of the hinge for attachment to the upper part of the door frame, a top centre strap for fixing to the top of the door and having a circular boss depending from one corner, the axis of the depending boss being perpendicular to the plane of the top centre strap, and an outer race of a rolling bearing within the depending boss, the pin forming the inner race of the rolling bearing.

2. A hinge as claimed in claim 1, in which the body is in the form of a metal die casting.

3. A hinge as claimed in claim 1, in which the body is in the form of a moulding in a synthetic plastics material.

4. A hinge as claimed in any preceding claim, in which the casing is in the form of a length cut from an extruded section in metal or a synthetic plastics material.

5. A hinge as claimed in any preceding claim, in which the pin is of hardened and ground steel and is cast or moulded into the body.

6. A hinge as -claimed in any preceding claim, in which the bearing is a needle roller bearing.

7. An upper hinge for a door, constructed and arranged substantially as herein described, with reference to and as illustrated in the drawings accompanying the Provisional Specification.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. dovetail cross-section of the body is a tight sliding fit. The end of the channel is cut away at 23 to clear the boss 14. A rectangular aperture 24 is punched out of the floor of the channel. When assembled the dovetailshaped portion of the body is pushed into the channel in the casing and a turret-head screw 25 is screwed into the tapped hole 17, the head of the screw 25 projecting into the rectangular aperture 24. By means of a pin which can engage in holes 26 in the turret head of the screw 25 the screw may be rotated to move the body 11 with respect to the casing 19. A block 27 is of dovetail cross-section and is a press fit in the end of the dovetail-shaped channel in the casing.When it has been forced into position it is close to the turret head of the screw 25 and serves to prevent any possibility of the screw releasing itself from the aperture 24 and the channel. The components 11, 19, 25 and 27 when assembled constitute the upper element of the hinge which is to be fitted into the upper part of the door frame. The second element of the hinge is a top centre strap 28 which is to be fitted to the top of the door. It comprises a flat plate 29 having a circular boss 30 depending from one corner. The top centre strap may also be in the form of a metal die casting or a moulding in a hard synthetic plastics material. It contains the outer race 31 of a rolling bearing containing needle rollers 32. The bearing may be packed with grease when the hinge is assembled. The casing 19 contains four fixing screw holes 32, 33, 34 and 35. The screw which passes through the hole 34 also passes through the slot 18 and the screw which passes through the hole 35 also passes through a hole 36 in the block 27. The top centre strap 28 has three screw holes 37, 38 and 39. From the foregoing description it will be evident that the invention provides an upper hinge for a door which is very simple in design and construction, which lends itself to modern methods of production and which is suitable for use with very heavy doors. WHAT WE CLAIM IS

1. An upper hinge for a door, comprising a body in the form of an elongate flat plate of dovetail cross-section having an integral circular boss at one corner, the axis of the boss being perpendicular to the plane of the plate, a cylindrical co-axial pin projecting from the boss, a casing of extruded section having a channel of mating dovetail shape in which the dovetail cross-section of the body is a tight sliding fit, an aperture inside and adjacent one end of the channel, a turret-head adjusting screw screwed into a tapped hole in the end of the body with its head accessible at the aperture, a dovetailshaped block pressed into the end of the channel in the casing adjacent the head of the turret-head screw to prevent the screw-head from jumping out of the channel ,the body, the casing, the adjusting screw and the block forming one element of the hinge for attachment to the upper part of the door frame, a top centre strap for fixing to the top of the door and having a circular boss depending from one corner, the axis of the depending boss being perpendicular to the plane of the top centre strap, and an outer race of a rolling bearing within the depending boss, the pin forming the inner race of the rolling bearing.

2. A hinge as claimed in claim 1, in which the body is in the form of a metal die casting.

3. A hinge as claimed in claim 1, in which the body is in the form of a moulding in a synthetic plastics material.

4. A hinge as claimed in any preceding claim, in which the casing is in the form of a length cut from an extruded section in metal or a synthetic plastics material.

5. A hinge as claimed in any preceding claim, in which the pin is of hardened and ground steel and is cast or moulded into the body.

6. A hinge as -claimed in any preceding claim, in which the bearing is a needle roller bearing.

7. An upper hinge for a door, constructed and arranged substantially as herein described, with reference to and as illustrated in the drawings accompanying the Provisional Specification.