US2805093A - Chain latch for doors and the like - Google Patents
Chain latch for doors and the like Download PDFInfo
- Publication number
- US2805093A US2805093A US53896455A US2805093A US 2805093 A US2805093 A US 2805093A US 53896455 A US53896455 A US 53896455A US 2805093 A US2805093 A US 2805093A
- Authority
- US
- United States
- Prior art keywords
- link
- chain
- door
- slot
- base plate
- 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 - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C17/00—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith
- E05C17/02—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means
- E05C17/04—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means with a movable bar or equivalent member extending between frame and wing
- E05C17/36—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means with a movable bar or equivalent member extending between frame and wing comprising a flexible member, e.g. chains
- E05C17/365—Security chains
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T292/00—Closure fasteners
- Y10T292/28—Extension link
- Y10T292/283—Chain
Definitions
- the present invention comprises a chain latch for doors and the like and more particularly a latch of the type in which a chain, having one end permanently affixed to the jamb of a door, is adapted to have its other end detachably secured to a fitting mounted on the door, with sufficient slack in the thus secured chain to permit the door to be opened slightly, and with disconnection of the chain from the fitting mounted on the door requiring the door to be completely closed.
- Important objects of the present invention are concerned with providing improvements in a device of the character indicated by which the device will be proof against disconnection at all times except when the door is fully closed, and which can be made economically by a simple stamping or other inexpensive manufacturing operation.
- Figure l is a front elevational view of portions of a door and door jamb, showing the door in fully closed position, with a preferred form of the chain latch pro-.
- Fig. 2 is a top plan view or the parts in the positions shown in Fig. 1;
- Fig. 3 is a bottom plan view of the keeper element of the combination comprising the invention.
- Fig. 4 is an end elevational view of the keeper element
- Fig. 5 is an end elevational view of the chain hanger element of the combination comprising the present invention
- v Fig. 6 is a bottom plan view of a modified form of keeper element.
- the reference numeral 1 designates a door, which may be of conventional wooden or metal construction common in living quarters such as dwelling houses, apartments, hotels and the like, and 2 designates a jamb against which'the door moves into flush alignment when com.- pletely' closed, as shown in Figs. 1 and 2.
- the invention provides a chain 3, formed of any convenient number of stout links of any conventional construction, such as the live similar links shown in the figures, comprising a length of some five inches, more or less, terminating at the outer end of the chain in a specially shaped link 4 which is of flat plate-like form and provided with an oblong fully enclosed slot 5 as best appears in Fig. l.
- the other end of the chain 3 is permanently secured to a hanger 6 which is mounted on the door jarnb, close to the door-receiving edge thereof, as by screws 7 passing through countersunk holes in a base portion 8.
- Permanent attachment of the chain to the hanger 6 may be effected by fitting the endmost of the similar links through an eye formed by a fully enclosed perforation 9 in an ear 10 outstanding from one edge of the base 8 of the hanger 6.
- a generally similar ear 11 may be formed at the opposite edge of the base of the hanger, symmetrically with and parallel to the ear 10, and the ear 11 may have a perforation 12 which is opened through the ear by a slot 13 so that the link 4 at the free end of the chain 3 may be hung in the perforation 12 by slipping the extreme outer end of the link which closes the slot 5 through the slot 13 in the car 11, to provide the hanging relationship shown in broken lines in Fig. 1.
- the chain is latched to the door 1 by engaging the terminal link 4 with the keeper generally designated 20 in Figs. 1, 2, 3 and 4.
- This keeper which, like the hanger 6 may be formed as a one-piece stamping, includes a base plate 21 drilled and countersunk to receive a pair of screws 22 by which the plate is secured permanently to the surface of the door 1.
- the base plate 21 is disposed in a vertical plane.
- a return bent hook structure generally designated 23, including a bottom plate portion 24 extending horizontally from the lower central edge of the base plate portion. The outer end of.
- this bottom plate portion is turned upwardly and reduced in width to form an upstanding neck 25, which is parallel to the base plate portion 21, and at its upper edge the neck is turned inwardly, in return bent relation to the bottom plate portion 24, to provide a top plate portion 26 which is longer than the width of the neck 25, longer than the length of the bottom plate portion 24, and longer than the length of the slot 5 in the terminal link 4 of the chain, all as shown inFigs. l and 2.
- the bottom plate portion 24 of the keeper is provided at its opposite ends with short slots 30 which are open to the front and rear edges of the bottom plate portion.
- the top edge of the base portion 21 is turned forward in the plane of the top plate portion 26 and its forward edge is curved, and the top plate portion 26 is complementally curved and spaced from the curved edge of the base portion to provide a generally arcuate slot as shown at 31 in Figs. 2 and 3.
- the proportions of the parts are such that the slot 5 in the terminal link/4 can be fitted over or around the top plate portion 26 if the link be inserted in the slot 31 oblique-ang'ularly to the length of the top plate portion 26, i. e., by turning the leading edge of the link along the curved path of the slot 31 while the link is held in a vertical plane. If then the link be turned down or twisted,
- the link 4 cannot be moved into disengagement from the keeper 26 when the slack is removed from the chain by any degree, even a very small degree, of movement of the door from fully closed position. The reason is that any such movement, which reduces the slack in the chain, makes it impossible to move the link 4 sufliciently to the right, as viewed in Fig. l, to permit the link to be twisted and turned about the neck 25 and over the top plate 26. Such movement requires the door to be in completely closed position.
- Fig. 6 shows a slight modification of the keeper of Figs. 1, 2 and 3 in which the-base plate portion 21a is not provided at its upper edge with the projections cooperating with adjacent edge of the top plate portion 26 to provide the slot 31.
- the top plate portion is curved in the same form as the top plate portion 26 of the keeper of Figs. 1, 2 and 3, and the same kind of twisting and turning movement is required for connection and disconnection of the link 4.
- the only difference in operation between the two forms of keeper is that the keeper of Fig. 6 locks the guiding feature of the slot 31 of the preferred form of keeper.
- a chain latch for doors and the like comprising a chain having a terminal link formed with a completely enclosed slot, in combination with a keeper therefor comprising a base plate adapted to be mounted in a vertical plane on a door or the like and a return bent hook outstanding from the base plate, said hook including a horizontal bottom having a slot open to one edge for penetration by the terminal link after the slot of the link has been passed over the hook and terminating in a top parallel to the bottom, extending over said slot of the horizontal bottom and having its free edge spaced from the base plate to admit said terminal link.
- a chain latch for doors and the like comprising a chain having a terminal link formed with a completely enclosed slot, in combination with a keeper for said chain comprising a base plate adapted to be mounted in a vertical plane on a door or the like and a return bent hook outstanding from the base plate and having a horizontal bottom plate portion connected to the base plate and having a pair of spaced slots each open to an opchain having a terminal link formed with a completely enclosed slot, in combination with a keeper for said chain comprising a base plate adapted to be mounted in a vertical plane on a door or the like and a return bent liook outstanding from the base plate and having vertically spaced horizontal bottom and top portions, said bottom portion being slotted inwardly from its opposite edges for penetration by the terminal link, with an edge of the link bearing against the under surface of the top portion of the hook, after the slot of the link has been passed over the hook.
- a chain latch for doors and the like comprising a chain having a terminal link formed with a completely enclosed slot, in combination with a keeper for said chain comprising a base plate adapted to be mounted ina vertical plane on a door or the like and a return bent hook outstanding from the base plate and having a bottom portion disposed in a horizontal plane and directly connected to the base plate and a parallel top portion connected to the bottom portion by a neck which is narrower than said top and bottom portions and is parallel to said base plate, said bottom portion being slotted inwardly from an edge for penetration by the terminal link after the slot of the link has been passed over the hook, and said top portion being disposed directly over the slot in the bottom portion and being longer than the slot in said terminal link, whereby passing the link over the top portion of the hook requires the link to be positioned obliquely to said top portion.
- a chain latch for doors and the like comprising a chain having a terminal link formed with a completely enclosed slot, in combination with a keeper for said chain comprising a base plate adapted to be mounted in a vertical plane on a door or the like, a horizontal bottom plate outstanding from the base plate and having a'slot penetrating from an edge thereof, a top plate parallel to the bottom plate and connected thereto by a neck portion parallel to the base plate, said top plate being longer than the slot in the terminal link whereby said link must be moved in a path oblique-angularly related to the length of the top plate in order for the slot in the link to be passed over said top plate, and the rear edge of said top plate and the adjacent surface of said base plate being complementally shaped to provide a curved slot adapted to admit the link and guide its movement into said oblique-angular path.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chain Conveyers (AREA)
Description
p 1957 A. VAN DEN THOORN 2,805,093
AND THE LIKE CHAIN LATCH FOR DOORS Filed 001:. 6, 1955 INVENTOR ATTORNEY rates The present invention comprises a chain latch for doors and the like and more particularly a latch of the type in which a chain, having one end permanently affixed to the jamb of a door, is adapted to have its other end detachably secured to a fitting mounted on the door, with sufficient slack in the thus secured chain to permit the door to be opened slightly, and with disconnection of the chain from the fitting mounted on the door requiring the door to be completely closed.
Important objects of the present invention are concerned with providing improvements in a device of the character indicated by which the device will be proof against disconnection at all times except when the door is fully closed, and which can be made economically by a simple stamping or other inexpensive manufacturing operation.
Other and further advantages of the invention will be evident to those skilled in the art from the following description of the preferred embodiments of the invention which are illustrated in the accompanying drawing, in which:
Figure l is a front elevational view of portions of a door and door jamb, showing the door in fully closed position, with a preferred form of the chain latch pro-.
vided by the present invention disposed in operative, latching position;
Fig. 2 is a top plan view or the parts in the positions shown in Fig. 1;
Fig. 3 is a bottom plan view of the keeper element of the combination comprising the invention;
Fig. 4 is an end elevational view of the keeper element;
Fig. 5 is an end elevational view of the chain hanger element of the combination comprising the present invention; and v Fig. 6 is a bottom plan view of a modified form of keeper element.
Referring now to these figures, and first to Figs. 1 and 2, the reference numeral 1 designates a door, which may be of conventional wooden or metal construction common in living quarters such as dwelling houses, apartments, hotels and the like, and 2 designates a jamb against which'the door moves into flush alignment when com.- pletely' closed, as shown in Figs. 1 and 2.
The invention provides a chain 3, formed of any convenient number of stout links of any conventional construction, such as the live similar links shown in the figures, comprising a length of some five inches, more or less, terminating at the outer end of the chain in a specially shaped link 4 which is of flat plate-like form and provided with an oblong fully enclosed slot 5 as best appears in Fig. l.
The other end of the chain 3 is permanently secured to a hanger 6 which is mounted on the door jarnb, close to the door-receiving edge thereof, as by screws 7 passing through countersunk holes in a base portion 8. Permanent attachment of the chain to the hanger 6 may be effected by fitting the endmost of the similar links through an eye formed by a fully enclosed perforation 9 in an ear 10 outstanding from one edge of the base 8 of the hanger 6.
A generally similar ear 11 may be formed at the opposite edge of the base of the hanger, symmetrically with and parallel to the ear 10, and the ear 11 may have a perforation 12 which is opened through the ear by a slot 13 so that the link 4 at the free end of the chain 3 may be hung in the perforation 12 by slipping the extreme outer end of the link which closes the slot 5 through the slot 13 in the car 11, to provide the hanging relationship shown in broken lines in Fig. 1.
It is in this position that the chain is disposed when not engaged in latching relation with the door 1.
The chain is latched to the door 1 by engaging the terminal link 4 with the keeper generally designated 20 in Figs. 1, 2, 3 and 4. This keeper which, like the hanger 6 may be formed as a one-piece stamping, includes a base plate 21 drilled and countersunk to receive a pair of screws 22 by which the plate is secured permanently to the surface of the door 1. Thus the base plate 21 is disposed in a vertical plane. Outstanding from the center of the bottom edge of the base plate is a return bent hook structure generally designated 23, including a bottom plate portion 24 extending horizontally from the lower central edge of the base plate portion. The outer end of. this bottom plate portion is turned upwardly and reduced in width to form an upstanding neck 25, which is parallel to the base plate portion 21, and at its upper edge the neck is turned inwardly, in return bent relation to the bottom plate portion 24, to provide a top plate portion 26 which is longer than the width of the neck 25, longer than the length of the bottom plate portion 24, and longer than the length of the slot 5 in the terminal link 4 of the chain, all as shown inFigs. l and 2.
The bottom plate portion 24 of the keeper is provided at its opposite ends with short slots 30 which are open to the front and rear edges of the bottom plate portion.
The top edge of the base portion 21 is turned forward in the plane of the top plate portion 26 and its forward edge is curved, and the top plate portion 26 is complementally curved and spaced from the curved edge of the base portion to provide a generally arcuate slot as shown at 31 in Figs. 2 and 3.
The proportions of the parts are such that the slot 5 in the terminal link/4 can be fitted over or around the top plate portion 26 if the link be inserted in the slot 31 oblique-ang'ularly to the length of the top plate portion 26, i. e., by turning the leading edge of the link along the curved path of the slot 31 while the link is held in a vertical plane. If then the link be turned down or twisted,
such that the permissible degree of opening of the door will provide suiiicient clearance between the door and iamb for a person on the inside to see and speak to a.
person on the outside. Moreover, as will be evident from the figures, the link 4 cannot be moved into disengagement from the keeper 26 when the slack is removed from the chain by any degree, even a very small degree, of movement of the door from fully closed position. The reason is that any such movement, which reduces the slack in the chain, makes it impossible to move the link 4 sufliciently to the right, as viewed in Fig. l, to permit the link to be twisted and turned about the neck 25 and over the top plate 26. Such movement requires the door to be in completely closed position.
It is thus impossible for a person on the outside of the door to unlatch the chain, even with the aid of an instrumentality inserted between the door and jamb.
In this respect the device provided by the present invention is deemed to be superior toall prior artvdevices of this general type with which I am acquainted. 7
. It willbe observed that, as showninFig. 1, in the latching position the link 4 hangs at a slight inclination to the horizontal.- This inclination brings the edges of the link Whichdefine the slot 5 into the two slots 30, with the uppermost corner of the link engaged with the under surface of the top plate portion 26. This provides a relatively rigid anchorage for the link from which it must be swung in order to free it from both'slots 30 preparatory to turning it and-twistingit about the neck 25 and upper plate portion 26 of the book 23.
Fig. 6 shows a slight modification of the keeper of Figs. 1, 2 and 3 in which the-base plate portion 21a is not provided at its upper edge with the projections cooperating with adjacent edge of the top plate portion 26 to provide the slot 31. However, in this form of keeper the top plate portion is curved in the same form as the top plate portion 26 of the keeper of Figs. 1, 2 and 3, and the same kind of twisting and turning movement is required for connection and disconnection of the link 4. The only difference in operation between the two forms of keeper is that the keeper of Fig. 6 locks the guiding feature of the slot 31 of the preferred form of keeper.
While the forms shown in the drawing constitute the preferred embodiments of the invention which have been tested in practice and found to give entirely satisfactory results, it is recognized that the invention may be embodied in other and further modified forms, and that not all of the features of the preferred embodiments need be used in order to attain some of the important novel advantages of the device. All such modified forms of the invention, to the extent that they embody any of the principles of the invention as defined by the appended claims, are therefore deemed to be within the scope and purview thereof.
I claim:
1. A chain latch for doors and the like comprising a chain having a terminal link formed with a completely enclosed slot, in combination with a keeper therefor comprising a base plate adapted to be mounted in a vertical plane on a door or the like and a return bent hook outstanding from the base plate, said hook including a horizontal bottom having a slot open to one edge for penetration by the terminal link after the slot of the link has been passed over the hook and terminating in a top parallel to the bottom, extending over said slot of the horizontal bottom and having its free edge spaced from the base plate to admit said terminal link.
2. A chain latch for doors and the like comprising a chain having a terminal link formed with a completely enclosed slot, in combination with a keeper for said chain comprising a base plate adapted to be mounted in a vertical plane on a door or the like and a return bent hook outstanding from the base plate and having a horizontal bottom plate portion connected to the base plate and having a pair of spaced slots each open to an opchain having a terminal link formed with a completely enclosed slot, in combination with a keeper for said chain comprising a base plate adapted to be mounted in a vertical plane on a door or the like and a return bent liook outstanding from the base plate and having vertically spaced horizontal bottom and top portions, said bottom portion being slotted inwardly from its opposite edges for penetration by the terminal link, with an edge of the link bearing against the under surface of the top portion of the hook, after the slot of the link has been passed over the hook.
4. A chain latch for doors and the like comprising a chain having a terminal link formed with a completely enclosed slot, in combination with a keeper for said chain comprising a base plate adapted to be mounted ina vertical plane on a door or the like and a return bent hook outstanding from the base plate and having a bottom portion disposed in a horizontal plane and directly connected to the base plate and a parallel top portion connected to the bottom portion by a neck which is narrower than said top and bottom portions and is parallel to said base plate, said bottom portion being slotted inwardly from an edge for penetration by the terminal link after the slot of the link has been passed over the hook, and said top portion being disposed directly over the slot in the bottom portion and being longer than the slot in said terminal link, whereby passing the link over the top portion of the hook requires the link to be positioned obliquely to said top portion.
5. A chain latch for doors and the like comprising a chain having a terminal link formed with a completely enclosed slot, in combination with a keeper for said chain comprising a base plate adapted to be mounted in a vertical plane on a door or the like, a horizontal bottom plate outstanding from the base plate and having a'slot penetrating from an edge thereof, a top plate parallel to the bottom plate and connected thereto by a neck portion parallel to the base plate, said top plate being longer than the slot in the terminal link whereby said link must be moved in a path oblique-angularly related to the length of the top plate in order for the slot in the link to be passed over said top plate, and the rear edge of said top plate and the adjacent surface of said base plate being complementally shaped to provide a curved slot adapted to admit the link and guide its movement into said oblique-angular path.
References Cited in the file of this patent UNITED STATES PATENTS
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53896455 US2805093A (en) | 1955-10-06 | 1955-10-06 | Chain latch for doors and the like |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53896455 US2805093A (en) | 1955-10-06 | 1955-10-06 | Chain latch for doors and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
US2805093A true US2805093A (en) | 1957-09-03 |
Family
ID=24149185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US53896455 Expired - Lifetime US2805093A (en) | 1955-10-06 | 1955-10-06 | Chain latch for doors and the like |
Country Status (1)
Country | Link |
---|---|
US (1) | US2805093A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2955863A (en) * | 1958-05-02 | 1960-10-11 | Gen Motors Corp | Tail gate latch for pick-up truck box |
US2985476A (en) * | 1959-05-04 | 1961-05-23 | Jesse W Tiffany | Safety gate latch |
DE2554643A1 (en) * | 1974-12-06 | 1976-06-10 | Yoshitaka Nakanishi | SNAP CHAIN LOCK FOR DOORS |
US4106800A (en) * | 1974-12-06 | 1978-08-15 | Yoshitaka Nakanishi | Chain latch for door |
US4422678A (en) * | 1981-02-17 | 1983-12-27 | Tuckett Larry L | Latch |
US20060097123A1 (en) * | 2004-11-09 | 2006-05-11 | Gallien James M | Anti-tipover device |
US7798544B1 (en) * | 2006-09-27 | 2010-09-21 | Elwood Bates | Door and gate latch with horseshoe handle |
GB2591494A (en) * | 2020-01-30 | 2021-08-04 | Uap Ltd | Restrictor and opening restriction system having closure |
US11696643B2 (en) | 2021-06-23 | 2023-07-11 | Thoughtful Furniture Company, Llc | Elongate stabilizers for preventing furniture from tipping |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1538599A (en) * | 1922-12-08 | 1925-05-19 | Harry E Soref | Safety device for holding dooks ajar |
US2036679A (en) * | 1936-04-07 | Gate ob door fastener |
-
1955
- 1955-10-06 US US53896455 patent/US2805093A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2036679A (en) * | 1936-04-07 | Gate ob door fastener | ||
US1538599A (en) * | 1922-12-08 | 1925-05-19 | Harry E Soref | Safety device for holding dooks ajar |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2955863A (en) * | 1958-05-02 | 1960-10-11 | Gen Motors Corp | Tail gate latch for pick-up truck box |
US2985476A (en) * | 1959-05-04 | 1961-05-23 | Jesse W Tiffany | Safety gate latch |
DE2554643A1 (en) * | 1974-12-06 | 1976-06-10 | Yoshitaka Nakanishi | SNAP CHAIN LOCK FOR DOORS |
US4106800A (en) * | 1974-12-06 | 1978-08-15 | Yoshitaka Nakanishi | Chain latch for door |
US4422678A (en) * | 1981-02-17 | 1983-12-27 | Tuckett Larry L | Latch |
US20060097123A1 (en) * | 2004-11-09 | 2006-05-11 | Gallien James M | Anti-tipover device |
US7175149B2 (en) * | 2004-11-09 | 2007-02-13 | Hangman Products, Inc. | Anti-tipover device |
US7798544B1 (en) * | 2006-09-27 | 2010-09-21 | Elwood Bates | Door and gate latch with horseshoe handle |
GB2591494A (en) * | 2020-01-30 | 2021-08-04 | Uap Ltd | Restrictor and opening restriction system having closure |
GB2591494B (en) * | 2020-01-30 | 2022-02-02 | Uap Ltd | Restrictor and opening restriction system having closure |
US11696643B2 (en) | 2021-06-23 | 2023-07-11 | Thoughtful Furniture Company, Llc | Elongate stabilizers for preventing furniture from tipping |
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