GB2535480A

GB2535480A - Process

Info

Publication number: GB2535480A
Application number: GB1502630.5A
Authority: GB
Inventors: Morris David
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-02-17
Filing date: 2015-02-17
Publication date: 2016-08-24
Anticipated expiration: 2035-02-17
Also published as: GB2535480B; GB201502630D0

Abstract

The lead came 1 for a leaded window is H shaped and comprises at least one wedge shaped, hard metalled core 2. The H shape may be formed of two parallel leaf sections connected via a central heart portion. There may be a plurality of hard metalled cores which contact the heart and are comprised of steel. In use the came has reduced movement and increased life span and durability compared to traditional cames. The wedge core enables the glass pane 4 to go deeper within the lead while maintaining a core thickness comparable to traditional cames. Also claimed is a method of installing a leaded window comprising placing glass panes between the came. Further claimed is use of the came and wedge shaped core for installing leaded windows.

Description

Process

Field of the invention

The invention relates to leaded lights used for leaded windows. Background to the invention Leaded lights for use in leaded windows as traditionally constructed can require 10 additional strengthening. The most common way to add strength to these leaded cores are by the use of either: external bars or steel works, known variously as 'saddle bars', stanchion bar's, lerramenta' and 'armatures'; or by the use internal steel strips known as 'steel cores' and 'steels' or where formed as part of the lead H section itself (known as lead came) 'steel cored lead'.

However, steel cored lead is difficult to cut combining, as it does, both hard and soft material. It is also visually different to standard lead and inflexible in use by its very nature It would be of advantage to provide improved leaded lights having a strengthening component without such disadvantages. It would further be an advantage to provide a leaded light which reduces movement in use and/or increases the life span/durability of the leaded light in use.

Statements of the invention

According to the present invention there is provided a substantially H shaped leaded light comprising at least one wedge shaped, hard metaled core. Advantageously, in use the wedge core forces glass against the leaf of the lead, thereby reducing flex. 30 Further, the wedge core section may enable the glass to go deeper within the lead whilst advantageously maintaining a core thickness comparable to or greater than the traditional type of leaded light.

Suitably, the leaded light comprises an H shaped cross-section composed of lead. Suitably the H shaped cross section is comprised of two substantially parallel leaf sections connected via a centrally placed "heart" of lead which is substantially perpendicular to the leaves.

Suitably, the wedge shaped (in cross-section), hard metaled core contacts with the "heart" of the leaded light.

Suitably, a plurality of wedge shaped hard metalled cores could be used in the leaded 10 light of the present invention Suitably, the hard metalled core may be made out of steel.

In a further aspect of the present invention, there is provided a method of installing a leaded window, said method comprising placing glass planes between a leaded light of the present invention.

In another aspect of the present invention, there is provided the use of a leaded light in accordance with the present invention for installing leaded windows.

Brief description of the drawings

The accompanying drawings are as follows:-Reference Figure 1 is a cross-section of a known steel cored lead.

Reference Figure 2 is a cross section of a traditional standard lead form.

Reference Figure 3 shows the cross -section of a typical leaded light with 3mm glass 30 (red) and 4mm glass (blue) having a 3 5mm steel core for strength.

Reference Figure 4 shows a longitudinal side view of a typical leaded light with steel core.

Figure 5 shows a cross-section of the leaded light of the present invention comprising a wedge shaped hard metalled core in use with blue and red glass.

Figure 6 shows a cross-section of the leaded light of the present invention comprising two wedge shaped hard metalled cores used on one side of the heart of the lead.

Figure 7 shows a cross-section of the leaded light of the present invention comprising two wedge shaped hard metalled cores one each on either side of the heart of the lead.

Detailed description of the invention

The present invention will now be described, by way of example only, with reference to the accompanying drawings.

Referring to Reference Figure 1, the steel cored leaded light (R1) comprises a steel core (R2) within the heart of the leaded light.

Reference Figure 2 sows a typical standard lead form (R5) in which the width of the 20 leaf (R3) is approximately 9mm and the "heart" of the lead (R4) is approx. 4.5mm.

Reference Figure 3 shows a cross-section of a typical leaded light with 3mm glass (red -R6) and 4mm glass (blue -R7) having a 3 5mm steel core (R8) for strength. The spaces around the glass are filled with leaded light cement (R9) which is a type of thin black putty brushed in after manufacture and used to seal the light to make it water tight.

Traditional leaded lights as detailed above have numerous disadvantages. Due to the varying manufacturing techniques of both the lead manufacturers and the steel core makers, the steel core (R8_ is always substantially thinner than the heart (R5) of the lead and consequently allows a degree of movement to occur before adding any strength -this initial movement over time decreases the effectiveness of the core considerably -see Reference Figure 4).

This flexing can lead to the sealant used in the lead flaking, cracking and then admitting water. Hence, the window is then not water tight and the traditional core rusts or corrodes and this causes further damage.

Further, in the event of a combination of thin glass and wide heart lead tradition steel core can tilt thus rendering it useless for its intended purpose If steel core is made to be a tight fit in the lead it is difficult to use and can only be used with the specific lead it is designed for.

Carrying various stocks of differing widths of core is not practical, expensive and due to being undesirable, not normal practice.

Figure 5 shows a cross-section of the leaded light (1) of the present invention comprising a wedge shaped hard metalled core (2) in use with blue (3) and red glass (4). As can be seen, the traditional flat mild steel core is replaced with a wedge shaped hard metalled core preferably comprised of steel, preferably polished steel.

The core (2) wedge glass against a leaf of the lead (1) during the construction of a leaded window. This reduces the ability of the lead to flex.

Further, the shape of the core enables the glass to go deeper into the lead whilst at the same time maintaining a beneficial overall thickness of core similar to or greater than the traditional type.

Further, advantageously, the shape of the new core enables the cement used to seal leaded glass windows to flow more evenly around the edge of the glass and this greater bulk of material may ensure longer life and durability.

Figure 6 shows a cross-section of the leaded light of the present invention comprising two wedge shaped hard metalled cores (2) used on one side of the heart of the lead. When the distance of the heart of the core is longer this is useful as such placement enables the wedges to slide against one another to fill the length of the heart such that the combined the two wedge shaped cores jam against both leaves of the lead. This advantage can be also used in normal heart lead if it has sufficient cover for the glass In another embodiment of the present invention as shown in Figure 7 a wedge shaped ore can be placed on either side of the heart in opposite directions allowing each opposing leaf to be strengthened.

No special tooling is required to incorporate this core as it can be easily cut to length using hand tools. Additionally because it is made of stainless steel no rusting can occur and this enables its use in windows that are not cemented in the traditional manner.

Because the new design allows the glass pieces to sit deeper into the lead any Any and all types of lead can have the new material inserted as it will, use either singularly or doubled up, adjust to the width of the lead thus avoiding the need for 15 varying widths of steel core or the use of only specific combinations of lead and core.

tendency for the edges to show or 'shine' may be greatly reduced.

Claims

Claims 1. An H shaped leaded light comprising at least one wedge shaped, hard metalled core.
2. A leaded light in accordance with claim 1 wherein hard metaled core contacts with the "heart" of the leaded light.
3. A leaded light in accordance with claim 1 or claim 2 wherein the leaded light comprises a plurality of wedge shaped, hard metalled cores.
4. A leaded light in accordance with any one of claims 1 to 3 wherein the hard metalled core is comprised of steel.
5. A method of installing a leaded window, said method comprising placing glass planes between a leaded light of any one of claims 1 to 4.
6. Use of a leaded of any one of claims 1 to 4 for installing leaded windows.
7. Use of a wedge shaped hard metalled core for installing leaded windows.Amendment to the claims have been filed as follows Claims 1. An 1-1 shaped lead came comprising two substantially parallel leaf sections connected via a centrally placed heart of lead which is substantially perpendicular to the leaves wherein the lead came includes at least one wedge shaped, hard metalled core comprised of steel, said core having a short side, abutting one of the leaf sections, a long side substantially perpendicular to the short side and abutting the heart, and a hypotenuse.2. A lead came in accordance with claim 1 or claim 2 wherein the lead came comprises a plurality of the wedge shaped, hard metalled cores.3. A lead came as claimed in either one of claims 1 and 2 wherein the long side of the wedge extends along substantially the entire length of the heart.4. A method of installing a leaded window, said method comprising placing glass planes between a lead came of any one of claims 1 to 3.5. Use of a lead came of any one of claims 1 to 3 for installing leaded windows.CO 6. Use of a wedge shaped hard metalled core comprised of steel for installing leaded windowsCDthe core having a short side, abutting one of the leaf sections, a long side substantially perpendicular to the short side and abutting the heart, and a hypotenuse.