US3741597A - Protective guard for a mortise type lock - Google Patents
Protective guard for a mortise type lock Download PDFInfo
- Publication number
- US3741597A US3741597A US3741597DA US3741597A US 3741597 A US3741597 A US 3741597A US 3741597D A US3741597D A US 3741597DA US 3741597 A US3741597 A US 3741597A
- Authority
- US
- United States
- Prior art keywords
- bushing
- stub
- disc
- lock
- spindle hole
- 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
Links
- 230000001681 protective effect Effects 0.000 title abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000002023 wood Substances 0.000 description 4
- 210000003811 finger Anatomy 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
- E05B9/02—Casings of latch-bolt or deadbolt locks
-
- 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
- Y10T292/03—Miscellaneous
-
- 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
- Y10T292/79—Bolt guards
-
- 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
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7441—Key
- Y10T70/7915—Tampering prevention or attack defeating
- Y10T70/7921—Armoring
Definitions
- C1 E05b 15/16 is a stub extending perpendicularly therefrem-
- a bushing is 70 431, 417, 41g 423 424 42 42g 4 0 positioned over the stub between the disc and the 259; 42 R flange whereby the flange retains the bushing.
- the stub with its bushing is adapted to be friction fitted into the [5 v Reference-sci! spindle hole of the lock.
- the disc and stub may be ro- E ATES- PATENTS tated but the bushing remains stationary.
- a mortise lock is constructed with spindle holes which are readily accessible from both sides of its housing. This is to facilitate its use either on the right side or left side of a door. Of course, in usual practice only the spindle hole for the dead bolt on one side is used for a manual operator. This side is on the inside, that is, opposite to the key cylinder side.
- the dead bolt may be operated manually by means of a thumb and finger knob.
- the other side of the spindle hole is not accessible as it is covered by the outer portion of the door. 7
- the present invention relates to a device which is employed to block off the dead bolt spindle hole.
- the device of the present invention is a disc of hardened metal with a stub thereon.
- the stub carrying the disc is inserted in the spindle hole and the disc lies on the surface of the mortise lock.
- the disc is sandwiched between the wood or metal of the door and the lock.
- the disc is mounted so that it is freely rotatable in the spindle hub. The rotation of the disc does not affect the spindle hub so the dead bolt cannot be retracted.
- FIG. I is a side perspective view of a mortise lock with the protective guard exploded therefrom.
- FIG. 2 is a similar view with the protective guard in position.
- FIG. 3 is a perspective view of one side of the guard.
- FIG. 4 is a side plan view of the guard.
- FIG. 5 is a cross-sectional view taken along line 55 of FIG. 4.
- FIG. 6 is a similar view as FIG. 3 with the bushing exploded therefrom.
- the protective guard 21 has a stub 22 which is inserted in the spindle hole 15. The result is to present a face as shown in FIG. 2 where the disc covers not only the spindle hole 15 but a considerable portion thereabout.
- the protective guard 21 includes a metal disc 23 which should be of hardened metal.
- the disc 23 depicted is circular in nature, but any flat polygonal structure would do as well.
- a bushing 25 having a diameter larger than the stub is positioned over the stub between the surface of the disc 23 and the flange 24.
- the bushing is seen to be split longitudinally so that it may be expanded prior to being passed over the flange 24 and thereby locked into position.
- FIGS. 3, 4 and 5 clearly portray the bushing 25 in position.
- the bushing 25 is freely rotatable about the stub. The purpose of this will be soon demonstrated in the following.
- the protective guard 21 With the protective guard assembled in the fashion shown in FIGS. 3, 4 and 5, there is presented the protective guard 21 as shown in FIG. 1.
- the stub 22 having thereon the bushing 25 is inserted into the spindle hole.
- the bushing is designed to achieve a friction fit with the inner periphery of the spindle hole.
- the diameter of the stub is adjusted so that together with the bushing it will indeed achieve a good friction fit.
- the bushing is freely rotatable about the stub, it will be seen that the disc may be easily rotated with the stub as its axis. However the bushing being free of the stub will not rotate so that rotation of the disc and its stub will not affect the hub of the spindle hole at all.
- the outer surface of the protective guard will be exposed when a hole is drilled or punched into the door by an illegal entrant.
- the disc is considerably larger than any hole usually made with conventional hand tools, access to the spindle hole is prevented as the disc cannot be removed. Only a much larger hole in the door will permit removal of the disc. An attempt to rotate the disc after a hole is breached through the door will not meet with any undue resistance. But as a result of the use of the bushing the disc will be permitted to rotate freely without turning the spindle hub to retract the bolt.
- the disc is of hardened metal it cannot be punctured as readily as the remaining portion of a wooden door or of the usual grade steel of a metal door. With the protective guard in place a much larger hole must be made before the guard can be removed.
- bushing shown above is of the split variety, a full annular type is also contemplated within the purview of the invention. In such an instance the bushing would have directional edges so that once pressed in place it would grab and lock behind the flange.
- the bushing may be a sleeve of metal or plastic.
- the invention includes the concept of the protective guard separate from the mortise lock, so that the installer of the lock hardware first determines the applicable hand for the door and presses the protective guard into a predetermined dead bolt spindle hole on the side toward the outside face of the door.
- the disc 23 is sufficiently thin so that no special effort need be made to enlarge the mortise configuration and dimension much beyond that ordinarily employed.
- stub with said bushing is positioned in said spindle hole, the side of the disc carrying said stub with said bushing is in confrontation with one of the surfaces of said mortise lock, the stub with said bushing is adapted to provide a friction fit between the outer surface of said bushing and the spindle hole whereby the stub and disc may freely rotate while said bushing remains stationary.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lock And Its Accessories (AREA)
Abstract
Description
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19927171A | 1971-11-16 | 1971-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3741597A true US3741597A (en) | 1973-06-26 |
Family
ID=22736873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US3741597D Expired - Lifetime US3741597A (en) | 1971-11-16 | 1971-11-16 | Protective guard for a mortise type lock |
Country Status (1)
Country | Link |
---|---|
US (1) | US3741597A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2618196A1 (en) * | 1975-04-30 | 1976-11-11 | Gkn Stenman Ab | METHOD AND DEVICE FOR THE BREAK-PROOF PROTECTION OF A LOCKING MECHANISM IN A LOCK CASE, EQUIPPED WITH LOCKING PISTON AND / OR DROP PISTON |
DE10002061A1 (en) * | 2000-01-18 | 2001-07-26 | Dorma Gmbh & Co Kg | Lock has lock box with projections on end side of its longitudinal side walls facing associated recesses in inverted guard for positive inter-engagement prior to welding or soldering connection |
US8555793B2 (en) | 2011-05-26 | 2013-10-15 | American Security Products Co. | Active hardplate |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1529775A (en) * | 1920-04-21 | 1925-03-17 | Dennett Roger John | Fastening, sealing, and labeling device for railway wagons or the like |
US1559699A (en) * | 1921-12-05 | 1925-11-03 | Bassick Co | Furniture shoe |
US2119994A (en) * | 1936-11-10 | 1938-06-07 | Frank E Love | Merchandise mechanical sealing and recording |
US2548104A (en) * | 1948-09-29 | 1951-04-10 | Robert E Frison | Tag and card holder |
US2594407A (en) * | 1949-03-15 | 1952-04-29 | Wiley W Earnest | Hubcap lock |
-
1971
- 1971-11-16 US US3741597D patent/US3741597A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1529775A (en) * | 1920-04-21 | 1925-03-17 | Dennett Roger John | Fastening, sealing, and labeling device for railway wagons or the like |
US1559699A (en) * | 1921-12-05 | 1925-11-03 | Bassick Co | Furniture shoe |
US2119994A (en) * | 1936-11-10 | 1938-06-07 | Frank E Love | Merchandise mechanical sealing and recording |
US2548104A (en) * | 1948-09-29 | 1951-04-10 | Robert E Frison | Tag and card holder |
US2594407A (en) * | 1949-03-15 | 1952-04-29 | Wiley W Earnest | Hubcap lock |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2618196A1 (en) * | 1975-04-30 | 1976-11-11 | Gkn Stenman Ab | METHOD AND DEVICE FOR THE BREAK-PROOF PROTECTION OF A LOCKING MECHANISM IN A LOCK CASE, EQUIPPED WITH LOCKING PISTON AND / OR DROP PISTON |
DE10002061A1 (en) * | 2000-01-18 | 2001-07-26 | Dorma Gmbh & Co Kg | Lock has lock box with projections on end side of its longitudinal side walls facing associated recesses in inverted guard for positive inter-engagement prior to welding or soldering connection |
DE10002061C2 (en) * | 2000-01-18 | 2002-01-31 | Dorma Gmbh & Co Kg | lock |
US8555793B2 (en) | 2011-05-26 | 2013-10-15 | American Security Products Co. | Active hardplate |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: KIDDE, INC., NEW YORK Free format text: CHANGE OF NAME;ASSIGNOR:WALTER KIDDE & COMPANY, INC.;REEL/FRAME:004056/0845 Effective date: 19820830 Owner name: KIDDE, INC. Free format text: CHANGE OF NAME;ASSIGNOR:WALTER KIDDE & COMPANY, INC.;REEL/FRAME:004056/0845 Effective date: 19820830 |
|
AS | Assignment |
Owner name: SARGENT MANUFACTURING COMPANY, 100 SARGENT DRIVE, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KIDDE, INC., A CORP. OF DE.;REEL/FRAME:004589/0616 Effective date: 19860206 Owner name: KIDDE, INC. Free format text: CHANGE OF NAME;ASSIGNOR:WALTER KIDDE & COMPANY, INC.;REEL/FRAME:004589/0612 Effective date: 19820830 |