CA1264564A - Drop-bolt lock assembly - Google Patents
Drop-bolt lock assemblyInfo
- Publication number
- CA1264564A CA1264564A CA000488175A CA488175A CA1264564A CA 1264564 A CA1264564 A CA 1264564A CA 000488175 A CA000488175 A CA 000488175A CA 488175 A CA488175 A CA 488175A CA 1264564 A CA1264564 A CA 1264564A
- Authority
- CA
- Canada
- Prior art keywords
- drop
- door
- guard plate
- assembly
- bolt
- 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
Landscapes
- Lock And Its Accessories (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A high security drop-bolt lock assembly for a door includes a cylinder lock carried by a guard plate positionable on the outside of the door with the cylinder lock within the door, and a drop-bolt assembly on the inside of the door. The drop-bolt assembly is connected to protected studs extending from the guard plate to make a strong unitary construction extremely difficult to defeat and protecting the cylinder lock behind the guard plate and within the door.
A high security drop-bolt lock assembly for a door includes a cylinder lock carried by a guard plate positionable on the outside of the door with the cylinder lock within the door, and a drop-bolt assembly on the inside of the door. The drop-bolt assembly is connected to protected studs extending from the guard plate to make a strong unitary construction extremely difficult to defeat and protecting the cylinder lock behind the guard plate and within the door.
Description
1~i4~
1233-13$A DROP-BQLT DOOR LOCK ASSEMBLY
RX-5t0 BACKGROUND-OF THE INVENTION
Field of the Invention This invention relates to improvements in drop-bolt-type lock assemblies, and particularly to such an S assembly operated from a protected hi~h security lock cylinder.
Prior Art It is known in the art that drop-bolt locks provide extremely good resistance to defeat by jimmying, chiseling, prying and the like.
However, even if a drop-bolt lock is highly resistant to defeat, it can be compromised if the cylinder which operates the lock bolt can be defeated.
It is also known in the art to protect lock cylinders by guard plates or the like. Nevertheless, there remains a need in the art to provide a drop-bolt lock and cylinder assembly which is highly resistant to defeat by jimmying, chiseling and prying. _ _ SUM~ARY OF THE INVENTION
This invention provides a drop-bolt lock assem~ly ~
for a door in which the drop-bolt assembly is on one side of the door, e.g., the inside, and an operating lock cylinder is accessed from the outside of the door. The lock cylinder is protected by a heavy guard plate and the body of the cylinder lock is within the body of the door, while the drop-bolt is on the inside surface of the door.
Thus, the cylinder lock is sandwiched between an outside guard plate and the inside drop-bolt operating housing.
The guard plate and drop-bolt operating housing are interconnected so as to provide an extremely rugged and s,trong defeat-proof lock bolt assembly.
. . .
~26~5~4 T I:r~` r)r~:SCr~:[ l~rION 0~ WI~IC.S
l~k~. 1 i5 a perspective view illustratinc3 tl)e protectec1 drop-lolt lock assc~ ly oE l:l~is invention.
I`ic~. 2 is a sic1c elevation~l view witl) portions sllown in section Eor the sake o~ clarity.
Fic~. 3 is an elevation view taken alonc~ line 3-3 o~ Fig. 2 and also illus~rating ~he door jam cln~1 keeper ~or the drop-bolt.
D~T~ILI~D DESCI~IPTION 0F Tl!E PnE~EI~I~ED r'M~ODIM~N~`
rhe principal componer)ts o~ the invention as ;hown in Fig. 1 include a drop-bolt asselnbly 10 a cylinder lock assembly 12 a guard pl~te as.sembly 1~ and a keeper or strike 16 see l~ig. 3. 'l~e c1rop-hol~ asselnl~ly 10 is mounted flusl~ on one sicie o~ a ~ioor 1). 'l'he c100r D has small holes Dh (3rilled there~ilroucJh on a pattern arounci a lar~e hole l)ll or a cylinder loclc. The cylinc1er lock assembly 12 extends into the lar~Je hole Dll Oe the c700r D
and the c~larcl plate assembly 1~ mounts ~lush to the outside o~ the door as illustrated in tl1e drawings. ~rhe keeper 16 is nloun~e<1 on tl1e insicle o~ the cloor to cooperate with tlle ~lrop-bolt asselnb:Ly 10 ais is known in the art.
'I`he c1r~p-bolt as-;ellll)ly 10 inclllcles a ho-lsing 1 hclvin~ ~lloun~inc~ El~n~3es 20 ex~enc1incJ rolll ti~e top and bottolll sicles thereoE. ~rhese mour)tinc~ ~langes have a plurality o i~oles positioned to mate witi~ the position o~ the holes ~h in the door D. The ec1cJe o~ the drop-bolt assembly adjacent the keeper 16 has spaces 2~ ~or mating Witl1 tl1e keeper the drop-l~olt extenclincJ vertically ~n ~hroul3h the spaces 2~ as is lcnown in tl1e art.
~ rhe drop-bolt hO-lSinC~ 1~ incorporates mechanisms whic11 oper~te ~hC! drOP-l)0~ ;UCI) Inechanisms arc the su~)ject o al1o~her app1 iCcl~iOIl assi~nec1 to Mecleco Security Loclcs Inc. Canadian ~pplication Serial No.
488~l740 The mechanisms in the housing are covered by a s `, ~ ~
j .. ~., ~ ' ~26~
a plate 26 which p~ovides access from the rear side of the housing, see Fig. 3.
The cylinder lock assembly 12 inciudes a cylinder lock 36 preferably of the high security type ~anufactured by Medeco Security I.ocks, Inc. of Salem, Virginia, and disclosed in U.S. Patent No~ 3,499,302.
The lock has an operating tang 38 which extends through plate 26 and into the mechanism within the drop-bolt housing 18 for operating the drop-bolt from the lock cylinder.
The keeper or strike 16 is formed of a keeper-mounting plate 32 and integral keeper rings 34 which extend into the spaces 24 to provide the holding function when the vertical drop-bolt is extended. The keeper mounting plate may be flat to fit flush or angled to fit a corner.
The guard plate assembly 14 is preferably formed with a thick protective plate 40 and a decorative cover plate 42. The guard plate assembly mounts the cylinder loc~ 36 as is known, and preferably as in the commercial guard plate sold by Medeco Security Locks~ Inc. under the trademark BODYGU~RD and as disclosed in United States PQtent Mo. 4,530,223 filed November 1, 19~2 and assigned to Medeco Security Locks, Inc. As disclosed in this patent application, a plurality of studs 44 are integral with the protective plate 40 and extend rearwardly therefrom.
These studs 44 extend through the holes Dh in the door D
and have threaded portions 46 at their ends. Hardened stud-protecting sleeves 48 are slipped over each of the studs 44 as shown in Fig. 1 to prevent sawing or otherwise cutting of the studs in an attempt to defeat the lock.
The threaded ends 46 of the studs 44 cooperate with internal threads in housing mounting screws 50 which ; ~ ; ;
6~5~
extend through holes 22 in the mounting flanges 20 of housing 18, see Figs. 1 and 2.
In installation, the door D is drilled with a template to provide the holes Dh and DH, the guard plate assembly 14 with the cylinder lock assembly 12 therein is placed against the door so that the cylinder locX
assembly 12 extends within the door and the tang 38 extends through the door for cooperating with the drop-bolt assembly 10O The drop-bolt assembly 10 is mounted flush on the inside surface of the door and is connected via mounting screws 50 to the ends of the sleeve-protected studs 44. A proper key (not shown) in cylinder lock 36 will operate tang 38 to cause the drop-bolt to either extend through or be retracted from a vertical path extending through spaces 24 and rings 34 of the keeper 16 If desired, the drop-bolt can also be operated from the inside of the door via thumb key 30 and lock cylinder 28. ~
As a variation, the drop-bolt can be operated with
1233-13$A DROP-BQLT DOOR LOCK ASSEMBLY
RX-5t0 BACKGROUND-OF THE INVENTION
Field of the Invention This invention relates to improvements in drop-bolt-type lock assemblies, and particularly to such an S assembly operated from a protected hi~h security lock cylinder.
Prior Art It is known in the art that drop-bolt locks provide extremely good resistance to defeat by jimmying, chiseling, prying and the like.
However, even if a drop-bolt lock is highly resistant to defeat, it can be compromised if the cylinder which operates the lock bolt can be defeated.
It is also known in the art to protect lock cylinders by guard plates or the like. Nevertheless, there remains a need in the art to provide a drop-bolt lock and cylinder assembly which is highly resistant to defeat by jimmying, chiseling and prying. _ _ SUM~ARY OF THE INVENTION
This invention provides a drop-bolt lock assem~ly ~
for a door in which the drop-bolt assembly is on one side of the door, e.g., the inside, and an operating lock cylinder is accessed from the outside of the door. The lock cylinder is protected by a heavy guard plate and the body of the cylinder lock is within the body of the door, while the drop-bolt is on the inside surface of the door.
Thus, the cylinder lock is sandwiched between an outside guard plate and the inside drop-bolt operating housing.
The guard plate and drop-bolt operating housing are interconnected so as to provide an extremely rugged and s,trong defeat-proof lock bolt assembly.
. . .
~26~5~4 T I:r~` r)r~:SCr~:[ l~rION 0~ WI~IC.S
l~k~. 1 i5 a perspective view illustratinc3 tl)e protectec1 drop-lolt lock assc~ ly oE l:l~is invention.
I`ic~. 2 is a sic1c elevation~l view witl) portions sllown in section Eor the sake o~ clarity.
Fic~. 3 is an elevation view taken alonc~ line 3-3 o~ Fig. 2 and also illus~rating ~he door jam cln~1 keeper ~or the drop-bolt.
D~T~ILI~D DESCI~IPTION 0F Tl!E PnE~EI~I~ED r'M~ODIM~N~`
rhe principal componer)ts o~ the invention as ;hown in Fig. 1 include a drop-bolt asselnbly 10 a cylinder lock assembly 12 a guard pl~te as.sembly 1~ and a keeper or strike 16 see l~ig. 3. 'l~e c1rop-hol~ asselnl~ly 10 is mounted flusl~ on one sicie o~ a ~ioor 1). 'l'he c100r D has small holes Dh (3rilled there~ilroucJh on a pattern arounci a lar~e hole l)ll or a cylinder loclc. The cylinc1er lock assembly 12 extends into the lar~Je hole Dll Oe the c700r D
and the c~larcl plate assembly 1~ mounts ~lush to the outside o~ the door as illustrated in tl1e drawings. ~rhe keeper 16 is nloun~e<1 on tl1e insicle o~ the cloor to cooperate with tlle ~lrop-bolt asselnb:Ly 10 ais is known in the art.
'I`he c1r~p-bolt as-;ellll)ly 10 inclllcles a ho-lsing 1 hclvin~ ~lloun~inc~ El~n~3es 20 ex~enc1incJ rolll ti~e top and bottolll sicles thereoE. ~rhese mour)tinc~ ~langes have a plurality o i~oles positioned to mate witi~ the position o~ the holes ~h in the door D. The ec1cJe o~ the drop-bolt assembly adjacent the keeper 16 has spaces 2~ ~or mating Witl1 tl1e keeper the drop-l~olt extenclincJ vertically ~n ~hroul3h the spaces 2~ as is lcnown in tl1e art.
~ rhe drop-bolt hO-lSinC~ 1~ incorporates mechanisms whic11 oper~te ~hC! drOP-l)0~ ;UCI) Inechanisms arc the su~)ject o al1o~her app1 iCcl~iOIl assi~nec1 to Mecleco Security Loclcs Inc. Canadian ~pplication Serial No.
488~l740 The mechanisms in the housing are covered by a s `, ~ ~
j .. ~., ~ ' ~26~
a plate 26 which p~ovides access from the rear side of the housing, see Fig. 3.
The cylinder lock assembly 12 inciudes a cylinder lock 36 preferably of the high security type ~anufactured by Medeco Security I.ocks, Inc. of Salem, Virginia, and disclosed in U.S. Patent No~ 3,499,302.
The lock has an operating tang 38 which extends through plate 26 and into the mechanism within the drop-bolt housing 18 for operating the drop-bolt from the lock cylinder.
The keeper or strike 16 is formed of a keeper-mounting plate 32 and integral keeper rings 34 which extend into the spaces 24 to provide the holding function when the vertical drop-bolt is extended. The keeper mounting plate may be flat to fit flush or angled to fit a corner.
The guard plate assembly 14 is preferably formed with a thick protective plate 40 and a decorative cover plate 42. The guard plate assembly mounts the cylinder loc~ 36 as is known, and preferably as in the commercial guard plate sold by Medeco Security Locks~ Inc. under the trademark BODYGU~RD and as disclosed in United States PQtent Mo. 4,530,223 filed November 1, 19~2 and assigned to Medeco Security Locks, Inc. As disclosed in this patent application, a plurality of studs 44 are integral with the protective plate 40 and extend rearwardly therefrom.
These studs 44 extend through the holes Dh in the door D
and have threaded portions 46 at their ends. Hardened stud-protecting sleeves 48 are slipped over each of the studs 44 as shown in Fig. 1 to prevent sawing or otherwise cutting of the studs in an attempt to defeat the lock.
The threaded ends 46 of the studs 44 cooperate with internal threads in housing mounting screws 50 which ; ~ ; ;
6~5~
extend through holes 22 in the mounting flanges 20 of housing 18, see Figs. 1 and 2.
In installation, the door D is drilled with a template to provide the holes Dh and DH, the guard plate assembly 14 with the cylinder lock assembly 12 therein is placed against the door so that the cylinder locX
assembly 12 extends within the door and the tang 38 extends through the door for cooperating with the drop-bolt assembly 10O The drop-bolt assembly 10 is mounted flush on the inside surface of the door and is connected via mounting screws 50 to the ends of the sleeve-protected studs 44. A proper key (not shown) in cylinder lock 36 will operate tang 38 to cause the drop-bolt to either extend through or be retracted from a vertical path extending through spaces 24 and rings 34 of the keeper 16 If desired, the drop-bolt can also be operated from the inside of the door via thumb key 30 and lock cylinder 28. ~
As a variation, the drop-bolt can be operated with
2.0 a single cylinder, namely, cylinder 36 rather than the double cylinder arrangement shown.
The arrangement provides an extremely strong, defeat~resistant lock bolt assembly not available with the known prior art constructions.
~: '
The arrangement provides an extremely strong, defeat~resistant lock bolt assembly not available with the known prior art constructions.
~: '
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A high security defeat-resistant, drop-bolt lock assembly for a door, the lock assembly comprising:
a) a cylinder lock having an operating member extending therefrom, b) a thick, tamper-resistant, substantially planar cylin-der lock guard plate adapted to be mounted against one side of the door, the guard plate mounting on one side thereof the cyl-inder lock and protecting the same, c) mounting studs integral with the guard plate and ex-tendable through holes in the door when the guard plate is mounted against one side of the door, d) a drop-bolt assembly positionable on the other side of the door and containing mounting portions on a housing thereof, e) hardened, stud-protecting sleeves positionable to slip over each mounting stud, each sleeve having one end connectable with the guard plate on one side of the door and an opposite end connectable with the drop-bolt assembly on the other side of the door, f) means cooperating with the guard plate studs, the sleeves and the mounting portions of the drop-bolt housing for connecting the housing, sleeves and guard plate and for securing the drop-bolt assembly housing to the guard plate studs and thereby integrally connect and secure the drop-bolt assembly housing, the sleeves and the guard plate to provide an integral connected assembly of the guard plate on one side of the door and the drop-bolt assembly on the other side of the door with the cylinder lock assembly sandwiched therebetween and protected inside the door.
a) a cylinder lock having an operating member extending therefrom, b) a thick, tamper-resistant, substantially planar cylin-der lock guard plate adapted to be mounted against one side of the door, the guard plate mounting on one side thereof the cyl-inder lock and protecting the same, c) mounting studs integral with the guard plate and ex-tendable through holes in the door when the guard plate is mounted against one side of the door, d) a drop-bolt assembly positionable on the other side of the door and containing mounting portions on a housing thereof, e) hardened, stud-protecting sleeves positionable to slip over each mounting stud, each sleeve having one end connectable with the guard plate on one side of the door and an opposite end connectable with the drop-bolt assembly on the other side of the door, f) means cooperating with the guard plate studs, the sleeves and the mounting portions of the drop-bolt housing for connecting the housing, sleeves and guard plate and for securing the drop-bolt assembly housing to the guard plate studs and thereby integrally connect and secure the drop-bolt assembly housing, the sleeves and the guard plate to provide an integral connected assembly of the guard plate on one side of the door and the drop-bolt assembly on the other side of the door with the cylinder lock assembly sandwiched therebetween and protected inside the door.
2. A lock assembly as in claim 1 further comprising an addi-tional cylinder lock for operating the drop-bolt in the drop-bolt assembly from the inside of the door.
3. A lock assembly as in claim 2 wherein the means for secur-ing the drop-bolt assembly to the mounting studs of the guard plate assembly includes internally-threaded nuts cooperating with the threaded portions of the studs and extending through holes in mounting flanges of the housing for the drop-bolt assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63758884A | 1984-08-03 | 1984-08-03 | |
| US637,588 | 1984-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1264564A true CA1264564A (en) | 1990-01-23 |
Family
ID=24556578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000488175A Expired CA1264564A (en) | 1984-08-03 | 1985-08-06 | Drop-bolt lock assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1264564A (en) |
-
1985
- 1985-08-06 CA CA000488175A patent/CA1264564A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |