GB2136872A - Friction pivots - Google Patents

Abstract

A friction pivot to be mounted on a fixed window frame comprises a base 1 having a socket 6 to receive a pivot boss. The position of the socket 6 can be adjusted by an adjustment screw 13 received in a block 2 secured to the frame and acting on a socket half 6a. An adjustment screw 7 extends through an upper frame part 4a and is connected to a block 8 having an upper socket half 6b which complements a lower socket half 6a formed in the base 1. Both socket halves have a friction lining 9. <IMAGE>

Description

SPECIFICATION Window pivot The invention relates to a window pivot and in particular to a window friction pivot having independent and separate means for adjusting the friction applied to a pivot arm extending from the window and the position at which the arm is received in the pivot.

According to one aspect of the invention there is provided a friction pivot for mounting a window in a window frame, the pivot comprising a base having a socket to receive a pivot arm extending from the window, adjusting means being present to adjust the friction applied to a pivot arm received in the socket, characterised in that independent adjusting means are present to adjust the position of the socket within the base.

Preferably, the pivot includes a separate block to be fixed on the window frame a short distance from the base, an adjustment screw extending from the block to the base and arranged to vary the position of the socket within the base.

Most preferably the separate adjustment means for the friction and the socket position are each provided with means eg. a lock nut, to prevent accidental movement of the adjustment means.

Most preferably the base is arranged so that only a portion thereof need be removed to allow demounting of the window for any reason, the portion left behind on the window frame including the means for setting the position of the socket in the base. In this way, the height adjustment of the pivot is unaffected by removal of the window.

According to a more specific aspect of the invention there is provided a friction pivot for a window comprising a base and a block to be fixed to a support such as a window frame, the base having a socket for receiving an end portion of the window pivot arm, the socket comprising two socket halves, one of the halves being movable with respect to the other for adjustment of the friction, the block being fixed a short distance from the base with an adjustment screw extending between them, rotation of the adjustment screw being arranged to move the position of the adjacent socket half with respect to the block.

The invention further includes a method of pivotally mounting a window in a window frame by means of friction pivots according to the invention by securing a block to each of opposite sides of the frame, loosely placing the respective base on the frame and adjusting its position by means of the respective independent adjustment means and securing the base to the frame, receiving the pivot pins of a window in the socket of the respective bases and if necessary adjusting the friction.

In order that the invention may be well understood it will now be described by way of example with reference to the accompanying diagrammatic drawings, in which: Figure 1 is a front elevation of a pivot base and block of the invention, Figure 2 is a side elevation thereof; and Figure 3 is a plan view of the clamp plate for use therewith.

The pivot comprises a base 1, a block 2 and a clamp plate 3 which is to be secured to the moving window, not shown. The base 1 comprises a frame 4 formed of detachable upper and lower frame parts 4a and 4b. The inside surface of the upper frame part 4a has two screw-receiving adjustment slots 5 to receive screws 1 6 to hold the base to a window frame. The lower frame part 4b is shaped to form a lower socket half 6a. An adjustment screw 7 extends through the upper frame part 4a and is connected to a block 8 having an upper socket half 6b to complement the lower socket half 6a. Both socket halves have a friction lining 9. A lock nut 10 is present on the outside of the upper frame part 4a and the screw 7 has a screw-slotted head 11.

Rotation of the screw 7 moves the upper socket half 6b with respect to the lower socket half 6a to increase or decrease the friction applied to a pivot pin boss 1 5 not shown, received in the socket defined by the socket halves.

The block 2 is screwed to the window frame, not shown, by screws passed through holes 1 2. An adjusting screw 1 3 extends from the lower end of the base 1 through a hole in the block 2 and passes through a lock nut 14 below the block 2.

The clamp plate 3 comprises a plate to be secured to a frame of the window and having a boss 1 5 to be received in the socket defined by the socket halves 6a, 6b.

The screws 7 and 1 3 are preset at the factory to predetermined height positions and levels of friction.

To locate the pivot on the window frame, the block 2 is screwed to the frame at a predetermined position. The base 1 is then loosely fixed to the frame by means of screws 1 6 part screwed to the frame through the slots 5. The base is then adjusted to engage the free end of the screw 1 3 (which may be moved as determined on site). The screws 1 6 are then screwed home. The pivot boss 1 5 is received in the socket 6.

Any adjustments required on site can be made using the screws 7, 1 3. When the window is opened and closed, the lock nuts tend to prevent any change of a setting. If it is necessary to move the window away from the frame for any reason, the upper frame part 4a is removed, the remaining parts being left behind and the setting for height being unaffected. The upper frame part 4a can be replaced and if necessary any change in friction can easily be made, again without upsett ing the position of the base.

The invention may be applied to both vertically and horizontally pivoted windows.

CLAIWIS 1. A Ericiion pivot for mounting a window in a window frame, the pivot comprising a base having a socket to receive a pivot arm ewending from the window, adjusting means being present to adjust the amount of friction applied to a pivot arm received in the socket chamcterised in that independent adjusting means are present to adjust the position of the socket within the base.

2. A pivot according to Claim 1 characterised in that the independent adjustment means comprises an adjustment screw which extends from the base to a block spaced a short distance from the base and the screw is arranged to vary the position of the socket within the base.

3. A pivot according to Claim 1 or 2 characterised in that a locknut is present to prevent accidental movement of the adjustment means.

4. A pivot according to any preceding claim characterised in that the pivot includes a portion which may be detached, e.g. to ailow demounting of a window, without affecting the independent adjusting means.

5. A friction pivot according to any preceding Claim characterised in that the base is secured to the window frame by screws received in elongate adjustment slots whereby the base may first be held loosely to the frame and the position of the socket adjusted by the independent adjustment means and then the screws are tightened to secure the pivot in the desired position.

6. A friction pivot for a window, the pivot comprising a base and a block to be fixed to a support such as a window frame, the base having a socket for receiving an end portion of the window pivot arm, the socket comprising two socket halves, one of the halves being movable with respect to the other for adjustment of the friction, the block being fixed a short distance from the base with an adjustment screw extending between them, rotation of the screw being arranged to move the position of the adjacent socket half with respect to the block.

7. A friction pivot substantially as described with reference to the drawings.

8. A window comprising a window mounted in a frame by pivots according to any preceding Claim.

9. A method of pivotally mounting a window in a window frame by means of a friction pivot according to any of Claims 1 to 7 characterised by securing a block to each of opposite sides of the frame, loosely placing the respective base on the frame and adjusting the position of the base by means of the respective independent adjustment means, securing the bases to the frame, receiving the pivot pins of a window in the socket of the respective bases and if necessary adjusting the friction.

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

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. ing the position of the base. The invention may be applied to both vertically and horizontally pivoted windows. CLAIWIS

1. A Ericiion pivot for mounting a window in a window frame, the pivot comprising a base having a socket to receive a pivot arm ewending from the window, adjusting means being present to adjust the amount of friction applied to a pivot arm received in the socket chamcterised in that independent adjusting means are present to adjust the position of the socket within the base.

2. A pivot according to Claim 1 characterised in that the independent adjustment means comprises an adjustment screw which extends from the base to a block spaced a short distance from the base and the screw is arranged to vary the position of the socket within the base.

3. A pivot according to Claim 1 or 2 characterised in that a locknut is present to prevent accidental movement of the adjustment means.

4. A pivot according to any preceding claim characterised in that the pivot includes a portion which may be detached, e.g. to ailow demounting of a window, without affecting the independent adjusting means.

5. A friction pivot according to any preceding Claim characterised in that the base is secured to the window frame by screws received in elongate adjustment slots whereby the base may first be held loosely to the frame and the position of the socket adjusted by the independent adjustment means and then the screws are tightened to secure the pivot in the desired position.

6. A friction pivot for a window, the pivot comprising a base and a block to be fixed to a support such as a window frame, the base having a socket for receiving an end portion of the window pivot arm, the socket comprising two socket halves, one of the halves being movable with respect to the other for adjustment of the friction, the block being fixed a short distance from the base with an adjustment screw extending between them, rotation of the screw being arranged to move the position of the adjacent socket half with respect to the block.

7. A friction pivot substantially as described with reference to the drawings.

8. A window comprising a window mounted in a frame by pivots according to any preceding Claim.

9. A method of pivotally mounting a window in a window frame by means of a friction pivot according to any of Claims 1 to 7 characterised by securing a block to each of opposite sides of the frame, loosely placing the respective base on the frame and adjusting the position of the base by means of the respective independent adjustment means, securing the bases to the frame, receiving the pivot pins of a window in the socket of the respective bases and if necessary adjusting the friction.