GB1564250A - Latch or lock set and method of manufacture thereof - Google Patents
Latch or lock set and method of manufacture thereof Download PDFInfo
- Publication number
- GB1564250A GB1564250A GB5440877A GB5440877A GB1564250A GB 1564250 A GB1564250 A GB 1564250A GB 5440877 A GB5440877 A GB 5440877A GB 5440877 A GB5440877 A GB 5440877A GB 1564250 A GB1564250 A GB 1564250A
- Authority
- GB
- United Kingdom
- Prior art keywords
- barrel
- back plate
- locking washer
- parallel
- latch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B3/00—Fastening knobs or handles to lock or latch parts
- E05B3/06—Fastening knobs or handles to lock or latch parts by means arranged in or on the rose or escutcheon
Description
(54) LATCH OR LOCK SET AND METHOD OF MANUFACTURE THEREOF
(71) I, GEOFFREY JAMES SUCK
LING, a British Subject, trading as DOR
TREND INTERNATIONAL, of Astral
Works, Wilden, Stourport-on-Severn, Worcestershire, DY13 9LH, do hereby declare the invention for which I pray that a patent may be granted to me and the method by which it is to be performed to be particularly described in and by the following statement:
This invention relates to a latch or lock set and a method of manufacture thereof.
For some applications or uses, the latch or lock set which is disclosed in United Kingdom Patent Specification No. 1,465,910 is too expensive and the principal object of the resent invention is to reduce the price of a latch or lock set to the purchaser without impairing the effectiveness of the article in performing the function for which it was designed.
According to a first aspect, the present invention consists in a latch or lock set which includes:
(a) a lever having a first portion comprising a barrel;
(b) a second portion of said lever, said second portion being connected by one of its ends to that end of said first portion which is remote from said barrel;
(c) a right-cylindrical recess formed in said lever and extending axially through the barrel;
(d) said barrel comprising oppositely and outwardly directed parallel flat faces and said barrel being interrupted at circumferentially spaced locations to provide two diametrically opposed slots which communicate with the recess and which extend axially of the barrel over at least a part of the axial length of the barrel, the median lines of said slots being contained in a plane which is parallel to said flat faces;
(e) said barrel extending through an aperture in a back plate;;
(f) a locking washer having an aperture therein, said aperture being defined in part by first peripheral portions of said washer which are parallel to one another and oppositely and inwardly directed; (g) inwardly extending lugs on said locking washer; and
(h) said first peripheral portions of said locking washer engaging the parallel flat faces of said barrel to secure the connected first and second portions to said back plate and to prevent any movement of said washer towards the free end of the said barrel, and the inwardly extending lugs on said locking washer extending into and through said diametrically opposed slots in the barrel to an extent such that the radially innermost free edges of said lugs lie in parallel planes which also contain parallel chords of the circle constituting the plan view of the right cylindrical recess.
According to a second aspect, the present invention consists in a latch or lock set which comprises, in combination:
(a) a back plate and a lever which has an integral barrel, the back plate being apertured to permit the extension therethrough of said barrel and the barrel extending through said aperture;
(b) a spring whose one end portion is connected to said barrel by snugly encircling the periphery of said barrel and whose other end portion engages a fixed anchorage;
(c) a right-cylindrical recess formed in said lever and extending axially through said barrel, and diametrically opposed slots interrupting the barrel at circumferentially spaced locations and which are so formed in the barrel as to communicate with said recess at their radially inner ends thereof and which extend axially of the barrel over at least a part of the axial length of the barrel;;
(d) a locking washer having lugs which project into and through said slots and having parallel edge portions in engagement with said barrel in such a manner as substantially to prevent any axial movement of said locking washer relative to said barrel after the lugs on the washer have been correctly positioned in said slots, the lugs projectng mto and through said slots to an extent such that the radially innermost free edges of said lugs lie in parallel planes which also contain parallel chords of the circular plan view of the right-cylindrical recess; and (e) said locking washer also incorporating angularly spaced abutments which coact one at a time with a stop which is associated with said back plate to limit the extent of angular movement of said lever about the axis of rotation of said barrel either against or under the influence of said spring.
In the latch or lock set as described in the preceding paragraph, both said stop and said fixed anchorage for the other end portion of the spring means may be provided by an apertured plate which is placed in said back plate and through which said barrel extends, said apertured plate being positioned between the back plate and the locking washer.Alternatively, said back plate may be channel-shaped and may have open ends which are closed by plugs, both said stop and said fixed anchorage for the other end portion of the spring means being provided by an apertured plate which is placed in the channel of said back plate and which is of a shape and dimensions such that it is unable to rotate in said channel about the axis of the aperture in said apertured plate, said spring being accommodated between facing surfaces of said back plate and said apertured plate and the barrel extending not only through the back plate but also through said apertured plate. In the case of said alternative, the apertured plate is preferably upset around the aperture therein, the respective portion of one face of the locking washer being in face-to-face contact with the upset part of the apertured plate.
According to a third aspect, the present invention consists in a method of making a latch or lock set, said method including the following steps, namely, cutting from an elongate extrusion one unit which is inherently suitable, dimensionally, for conversion into a door lever and which consists of integral first and second portions; reducing part of said first portion to form a protuberance and drilling a right-cylindrical recess extending axially through said protuberance, said reduction and said drilling creating a barrel which is integral with said first portion and which has diametrically opposed slots at least at its free end, said slots interrupting said barrel at circumferentially spaced locations and being in communication with the recess; causing said barrel to extend through an aperture therefor in a back plate; and applying a locking washer to said barrel in order to secure said door lever to said back plate and in order to position innermost free edges of lugs carried by said locking washer in such a manner that said free edges lie in parallel planes which also contain parallel chords of the circle constituting the plan view of the rightcylindrical recess.
Preferably, in said method, one end portion of a spring is connected to said barrel and the other end portion of said spring is brought into engagement with a fixed stop which is associated with the back plate, said connection and engagement of said end portions of said spring being effected before application of said locking washer to said barrel.
In the method described in either of the two preceding paragraphs, said locking washer may be applied to said barrel by bringing parallel first peripheral portions of said locking washer into alignment with parallel flat faces of said barrel, and causing said locking washer and said barrel to move relative to one another axially of the barrel from the free end of the barrel towards the back plate, whereby said parallel peripheral portions of the locking washer are made to slide along the parallel flat faces of said barrel and said lugs are caused to move axially of the barrel along said diametrically opposed slots.
The present invention will now be more particularly described with reference to the accompanying diagrammatic drawing, in which:
Figure 1 is a detail view, in plan, of a part of a latch or lock set; and
Figure 2 is a view looking at the end of the mechanism shown in Figure 1, the viewing direction being in the direction of the arrow
A in Figure 1.
In view of the state of the art disclosed in
Patent Specification No. 1,465,910, it is considered that a very brief description will be enough to make the present invention understood.
A back plate 10 has a lever 11 securely connected thereto by means of a locking washer 12 engaging a barrel 13 which is integral with said lever, said barrel 13 having parallel flat faces 14 which are positively gripped by the edges of springy portions 15 of the washer. The washer 12 has spaced abutments 16 which coact, one at a time, with a stop 17 which is upset out of an apertured plate 18. The washer 12 also has opposed lugs 19 which project into and through diametrically opposed slots 20 which are formed in the barrel 13 and which have medial lines contained in a plane which is parallel to the faces 14. One end 21 of a lever return spring is also shown in Figure 1, the disposition and action of said spring being known from said Patent Specification.
The barrel 13 has a right-cylindrical recess 22 formed therein for the accommodation of the respective end of the conventional square section rod which extends through the door and serves to connect the lever 11 to the releasable latch mechanism.
The free ends of the lugs 19 serve to engage the respective parallel faces of the square section rod to enable the latch mechanism to be released. This engagement is made possible by the fact that said free ends are straight edges which are contained in parallel planes which also contain chords of the circle which constitutes the plan view of the right-cylindrical recess 22.
A further feature of the present invention is that the locking washer 12 is prevented from digging into or binding against the respective surface of the plate 18 by an upset portion or portions 23 being formed in said plate 18. The washer 12 thus has a reduced surface contact with said plate 18.
WHAT I CLAIM IS:
1. A latch or lock set which includes:
(a) a lever having a first portion comprising a barrel;
(b) a second portion of said lever, said second portion being connected by one of its ends to that end of said first portion which is remote from said barrel;
(a) a right cylindrical recess formed in said lever and extending axially through the barrel;
(d) said barrel comprising oppositely and outwardly directed parallel flat faces and said barrel being interrupted at circumferentially spaced locations to provide two diametrically opposed slots which communicate with the recess and which extend axially of the barrel over at least a part of the axial length of the barrel, the median lines of said slots being contained in a plane which is parallel to said flat faces;
(e) said barrel extending through an aperture in a back plate;;
(f) a locking washer having an aperture therein, said aperture being defined in part by first peripheral portions of said washer which are parallel to one another and oppositely and inwardly directed; inwardly extending lugs on said locking washer; and
(h) said first peripheral portions of said locking washer engaging the parallel flat faces of said barrel to secure the connected first and second portions to said back plate and to prevent any movement of said washer towards the free end of the said barrel, and the inwardly extending lugs on said locking washer extending into and through said diametrically opposed slots in the barrel to an extent such that the radially innermost free edges of said lugs lie in parallel planes which also contain parallel chords of the circle constituting the plan view of the right cylindrical recess.
2. A latch or lock set which comprises, in combination: (a) a back plate and a lever which has an integral barrel, the back plate being aper- tured to permit the extension therethrough of said barrel and the barrel extending through said aperture;
(b) a spring whose one end portion is connected to said barrel by snugly encircling the periphery of said barrel and whose other end portion engages a fixed anchorage;
(c) a right-cylindrical recess formed in said lever and extending axially through said barrel, and diametrically opposed slots interrupting the barrel at circumferentially spaced locations and which are so formed in the barrel as to communicate with said recess at their radially inner ends and which extend axially of the barrel over at least a part of the axial length of the barrel;;
(d) a locking washer having lugs which project into and through said slots and having parallel edge portions in engagement with said barrel in such a manner as substantially to prevent any axial movement of said locking washer relative to said barrel after the lugs on the washer have been correctly positioned in said slots, the lugs projecting into and through said slots to an extent such that the radially innermost free edges of said lugs lie in parallel planes which also contain parallel chords of the circular plan view of the right-cylindrical recess; and (e) said locking washer also incorporating angularly spaced abutments which coact one at a time with a stop which is associated with said back plate to limit the extent of angular movement of said lever about the axis of rotation of said barrel either against or under the influence of said spring.
3. A latch or lock set as claimed in
Claim 2, wherein both said stop and said fixed anchorage for the other end portion of the spring means are provided by an apertured plate which is placed in said back plate and through which said barrel extends, said apertured plate being positioned between the back plate and the locking washer.
4. A latch or lockset as claimed in Claim 2, wherein said back plate is channel-shaped and has open ends which are closed by plugs, both said stop and said fixed anchorage for the other end portion of the spring means being provided by an apertured plate which is placed in the channel of said back plate and which is of a shape and dimensions such that it is unable to rotate in said channel about the axis of the aperture in said apertured plate, said spring being accommodated between facing surfaces of said back plate and said apertured plate and the barrel extending not only through the back plate but also through said apertured
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
1. A latch or lock set which includes:
(a) a lever having a first portion comprising a barrel;
(b) a second portion of said lever, said second portion being connected by one of its ends to that end of said first portion which is remote from said barrel;
(a) a right cylindrical recess formed in said lever and extending axially through the barrel;
(d) said barrel comprising oppositely and outwardly directed parallel flat faces and said barrel being interrupted at circumferentially spaced locations to provide two diametrically opposed slots which communicate with the recess and which extend axially of the barrel over at least a part of the axial length of the barrel, the median lines of said slots being contained in a plane which is parallel to said flat faces;
(e) said barrel extending through an aperture in a back plate;;
(f) a locking washer having an aperture therein, said aperture being defined in part by first peripheral portions of said washer which are parallel to one another and oppositely and inwardly directed; inwardly extending lugs on said locking washer; and
(h) said first peripheral portions of said locking washer engaging the parallel flat faces of said barrel to secure the connected first and second portions to said back plate and to prevent any movement of said washer towards the free end of the said barrel, and the inwardly extending lugs on said locking washer extending into and through said diametrically opposed slots in the barrel to an extent such that the radially innermost free edges of said lugs lie in parallel planes which also contain parallel chords of the circle constituting the plan view of the right cylindrical recess.
2. A latch or lock set which comprises, in combination: (a) a back plate and a lever which has an integral barrel, the back plate being aper- tured to permit the extension therethrough of said barrel and the barrel extending through said aperture;
(b) a spring whose one end portion is connected to said barrel by snugly encircling the periphery of said barrel and whose other end portion engages a fixed anchorage;
(c) a right-cylindrical recess formed in said lever and extending axially through said barrel, and diametrically opposed slots interrupting the barrel at circumferentially spaced locations and which are so formed in the barrel as to communicate with said recess at their radially inner ends and which extend axially of the barrel over at least a part of the axial length of the barrel;;
(d) a locking washer having lugs which project into and through said slots and having parallel edge portions in engagement with said barrel in such a manner as substantially to prevent any axial movement of said locking washer relative to said barrel after the lugs on the washer have been correctly positioned in said slots, the lugs projecting into and through said slots to an extent such that the radially innermost free edges of said lugs lie in parallel planes which also contain parallel chords of the circular plan view of the right-cylindrical recess; and (e) said locking washer also incorporating angularly spaced abutments which coact one at a time with a stop which is associated with said back plate to limit the extent of angular movement of said lever about the axis of rotation of said barrel either against or under the influence of said spring.
3. A latch or lock set as claimed in
Claim 2, wherein both said stop and said fixed anchorage for the other end portion of the spring means are provided by an apertured plate which is placed in said back plate and through which said barrel extends, said apertured plate being positioned between the back plate and the locking washer.
4. A latch or lockset as claimed in Claim 2, wherein said back plate is channel-shaped and has open ends which are closed by plugs, both said stop and said fixed anchorage for the other end portion of the spring means being provided by an apertured plate which is placed in the channel of said back plate and which is of a shape and dimensions such that it is unable to rotate in said channel about the axis of the aperture in said apertured plate, said spring being accommodated between facing surfaces of said back plate and said apertured plate and the barrel extending not only through the back plate but also through said apertured
plate.
5. A latch or lock set as claimed in
Claim 4, wherein the apertured plate is upset around the aperture therein and wherein the respective portion of one face of the locking washer is in face-to-face contact with the upset part of the apertured plate.
6. A method of making a latch or lock set, said method including the following steps, namely, cutting from an elongate extrusion one unit which is inherently suitable, dimensionally, for conversion into a door lever and which consists of integral first and second portions; reducing part of said first portion to form a protuberance and drilling a right-cylindrical recess extending axially through said protuberance, said reduction and said drilling creating a barrel which is integral with said first portion and which has diametrically opposed slots at least at its free end, said slots interrupting said barrel at circumferentially spaced locations and being in communication with the recess; causing said barrel to extend through an aperture therefor in a back plate; and applying a locking washer to said barrel in order to secure said door lever to said back plate and in order to position innermost free edges of lugs carried by said locking washer in such a manner that said free edges lie in parallel planes which also contain parallel chords of the circle constituting the plan view of the right-cylindrical recess.
7. A method as claimed in Claim 6, wherein one end portion of a spring is connected to said barrel and the other end portion of said spring is brought into engagement with a fixed stop which is associated with the back plate, said connection and engagement of said end portions of said spring being effected before application of said locking washer to said barrel.
8. A method as claimed in Claim 6 or
Claim 7, wherein said locking washer is applied to said barrel by bringing parallel first peripheral portions of said locking washer into alignment with parallel flat faces of said barrel, and causing said locking washer and said barrel to move relative to one another axially of the barrel from the free end of the barrel towards the back plate, whereby said parallel peripheral portions of the locking washer are made to slide along the parallel flat faces of said barrel and said lugs are caused to move axially of the barrel along said diametrically opposed slots.
9. A latch or lock set constructed.
arranged and operable substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
10. A method of making a latch or lock set substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5440877A GB1564250A (en) | 1977-12-31 | 1977-12-31 | Latch or lock set and method of manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5440877A GB1564250A (en) | 1977-12-31 | 1977-12-31 | Latch or lock set and method of manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1564250A true GB1564250A (en) | 1980-04-02 |
Family
ID=10470914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5440877A Expired GB1564250A (en) | 1977-12-31 | 1977-12-31 | Latch or lock set and method of manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1564250A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4784418A (en) * | 1981-10-01 | 1988-11-15 | George Salter & Co., Ltd. | Door latch handle fittings and retainers therefor |
-
1977
- 1977-12-31 GB GB5440877A patent/GB1564250A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4784418A (en) * | 1981-10-01 | 1988-11-15 | George Salter & Co., Ltd. | Door latch handle fittings and retainers therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |