US3810145A - Door bolt with electric alarm - Google Patents
Door bolt with electric alarm Download PDFInfo
- Publication number
- US3810145A US3810145A US00301589A US30158972A US3810145A US 3810145 A US3810145 A US 3810145A US 00301589 A US00301589 A US 00301589A US 30158972 A US30158972 A US 30158972A US 3810145 A US3810145 A US 3810145A
- Authority
- US
- United States
- Prior art keywords
- switch
- door bolt
- intruder
- bolt
- contacts
- 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
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B45/00—Alarm locks
- E05B45/06—Electric alarm locks
- E05B45/08—Electric alarm locks with contact making inside the lock or in the striking plate
- E05B45/083—Electric alarm locks with contact making inside the lock or in the striking plate with contact making either in the striking plate or by movement of the bolt relative to the striking plate
- E05B45/086—Electric alarm locks with contact making inside the lock or in the striking plate with contact making either in the striking plate or by movement of the bolt relative to the striking plate by transverse movement
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S70/00—Locks
- Y10S70/49—Locks with alarm
Definitions
- This invention is in the field of alarm devices and is for use in such places as homes, apartments, motels, and hotels.
- a primary object is a door bolt with an electric alarm that provides an alarm indication when an intruder tampers with a secured door bolt.
- Another object is an alarm device that has an indicator such as a lamp so that the operator of the device can tell when the device is in its operating mode.
- Another object is an alarm device that will provide an alarm when the door bolt is severed, forced open, or when a large force is applied to the door. Another object is an alarm device that gives an alarm indication only when an intruder tampers with the locked door bolt.
- FIG. 1 is a front view of one embodiment of a door bolt with an electric alarm
- FIG. 2 is a sectional view along line 22 of FIG. 1;
- FIG. 3 is a side view of FIG. 1;
- FIG. 4 is a schematic diagram of the electric alarm circuit of the device
- FIG. 5 is a front view of an alternate form of the alarm device
- FIG. 6 is a top view of FIG. 5 with parts broken away;
- FIG. 7 is a top view of the device shown in FIG. 5
- FIG. 8 is an electrical circuit diagram of the alarm circuit of the device shown in FIGS. 5, 6, and 7;
- FIG. 9 is a front view of another alternate form of the device with the bolt in an unlocked position
- FIG. 10 is the same as FIG. 9, except that the bolt is now in the locked position
- FIG. 11 is a front view of the housing shown in FIG. 9 with the door bolt removed;
- FIG. 12 is a sectional view along line 12--12 of FIG. 11;
- FIG. 13 is a partial view of the bolt of FIGS. 9 and 10 with the cam portion shown in detail;
- FIG. 14 is a sectional view along line 14-14 of FIG. 13;
- FIG. 15 is a sectional view along line 15-15 of FIG. 10;
- FIG. 16 is a side view of FIG. 9 with parts broken away with the bolt in an unlocked position
- FIG. 17 is a side view of FIG. 10 with parts broken away with the bolt in a locked position.
- FIG. 18 is an electrical circuit diagram of the alarm circuit of the device shown in FIGS. 9 through 17.
- FIGS. 1 through 18 Three forms of the door bolt and alarm device will be described, although the invention should not be limited to the precise structures shown.
- the various structures shown in FIGS. 1 through 18 include a door bolt, a door bolt housing, and an alarm and detector means.
- the alarm and detector means each include two detector switches, an alarm device, and a power source.
- FIGS. 1, 2 and 3 in its locked position in the door bolt housing 10.
- the door bolt housing 10 is mounted to the door by fasteners 16 such as screws or the like, in the same position as a standard door bolt.
- the housing 10 has a channel 18, rectangular in shape except for two elongated locking grooves 20 and 22, located at the far edges of the bolt channel.
- the door bolt 14, a generally straight rod, has a handle 24 which slides in the bolt channel 18.
- the alarm and detector means 12 includes a housing 26 which is mounted by appropriate fasteners 30 such as screws.
- the door bolt 14 enters the housing 26 through an opening 32.
- Mounted in the alarm detector means housing 26 are a buzzer alarm device 34, an operating mode indicator lamp 36, a detector switch 38, and an intruder switch 40 that also is an alarm actuator,-and a battery power source 42.
- the alarm device is shown as a buzzer, it should be understood that various other alarm means are equally satisfactory.
- the battery power source 42 may be a nine volt transistor" battery and is connected to the operating indicator lamp 36 through detector switch 38.
- the buzzer alarm device 34 is connected to the battery power source 42 through detector switch 38 and intruder switch 40.
- the contacts of the detector switch 38 are normally open while the contacts of the intruder switch 40 are normally closed.
- the end 44 of the door bolt does not extend far enough into the housing 26 to engage the switch actuator button 46 of the detector switch 38 or the actuating arm 48 of the intruder switch 40.
- the switches will be in their normal contact modes with detector switch 38 open and intruder switch 40 closed.
- the alarm circuit will then be in the condition shown in FIG. 4. Neither the operating indicator lamp 36 nor the buzzer alarm device 34 will be operated.
- the door bolt 14 moves to the left and enters opening 32 of the housing 26.
- the door bolt 14 will contact the actuating arm 48 of switch 40 at roller wheel 50 attached to the actuating arm before contacting the switch button 46 of switch 38.
- the switch contacts of switch 40 will open while the contacts of switch 38 will remain open.
- the end of the door bolt 44 will contact switch button 46.
- switch 38 will now close, and will remain closed due to the latching design of the switch, lighting lamp 36. This indicates that the alarm device is now in operation. Since the door bolt 14 is still actuating the intruder switch 40 through roller 50 and actuating arm 48, its switch contacts remain open.
- switch button 46 is released with its switch contacts not being opened until the bolt handle 24 is unlocked by again moving it to the left of groove 22 in order to re-enter the bolt channel 18.
- the dimensions of the elongated groove are such that the bolt handle 24 must enter the groove 22 at its left side to clear extension 28 of groove 22. Due to extension 28 of elongated groove 22, the groove 22 is wider at its bottom than at its top where the bolt handle 24 first enters the groove.
- the door bolt 14 will move in opening 32 toward the wall 52 in FIG. 2.
- the detector switch 38 will remain actuated because it is latched. However, the door bolt 14 will move away from roller wheel 50, allowing actuating arm 48 to move downward in FIG. 1 such that the intruder switch is returned to its normal closed position. Since the contacts of switch 38 are closed and those of intruder switch 40 are also closed, the battery 42 delivers power to the buzzer alarm device 34 alerting the occupants to the presence of the intruder.
- FIGS. 5, 6, 7, and 8 The structure shown in FIGS. 5, 6, 7, and 8 includes a door bolt housing 110, a door bolt 112 and detector means 114 for determining the position of the door bolt 112.
- the alarm means and the operating indicator lamp may be similar to that shown in FIGS. 1-4 and will not be discussed in detail.
- the battery 42, the buzzer 34, and the operating indicator lamp 36 are shown in the electrical circuit diagram FIG. 8.
- the door bolt housing 110 which is fastened to the door by means of appropriate fasteners 116 has a bolt channel 118 with elongated locking groove 120 for the bolt handle 122.
- the door bolt housing 110 provides support for the door bolt 112 which slides in the door bolt housing as the door bolt handle 122 is moved in the bolt channel 118.
- the door bolt 112 is thicker than that shown in FIGS. 1-4 and includes a thin, rod-like extension, or bolt neck 130 at the end of the door bolt which enters the detector means 114.
- a bolt sleeve 132 is mounted on the bolt neck 130 by means of a passage drilled through the center of the bolt sleeve 132.
- a spring 134 is placed over the bolt neck 130 in the passage of the bolt sleeve between the washer 138 and the walls of the passageway at 136. The spring 134 is selected to provide a small amount of tension to hold the bolt sleeve 132 against the door bolt 112 where the bolt originates.
- the detector means 114 includes a detector switch 150, an intruder switch 152 and a detector housing 154 that supports the switches and 152 and is fastened to the wall or door jamb adjacent the door.
- the detector switch 150 is mounted to the housing 154 by a bracket 156 and screws 158.
- the intruder switch 152 is mounted to the housing 154 by a bracket 160 and screws 162.
- the detector switch 150 has normally open contacts when its actuator arm 164 has no force applied to it, allowing the actuator button 166 to be in its extended or upward position. When force is applied against the actuator arm 164 depressing the actuator button 166, the contacts of the detector switch 150 are closed.
- intruder switch 152 are also normally open when no force is applied to actuating arm 168 such as not to depress actuator button 170. When force is applied to the actuating arm 168, the actuator button 170 is depressed and the contacts are closed.
- the switches 150 and 152 are connected to the battery 42, the operating indicator lamp 36 and the buzzer 34 by appropriate wiring means to form the electrical circuit shown in FIG. 8.
- the battery 42 is connected through detector switch 150 to the operating indicator lamp 36.
- the buzzer 34 is connected to the battery 42 through detector switch 150 and intruder switch 152.
- the detector housing 154 includes a jam housing cam 172 where the bolt sleeve 132 enters the housing 154.
- the jam housing cam 172 is a circular hole in the.
- detector housing 154 with a beveled edge 174 on the inside opening of the detector housing 154.
- the bevel has a larger diameter on the inside of the housing than halfway through the housing.
- the bevel of the walls of the jam housing cam 172 is similar to the neck of the bolt sleeve 132.
- detector switch 150 and intruder switch 152 are both in their normally open position as shown in FIG. 8. Therefore, neither the operating indicator lamp 36 nor the buzzer 34 is actuated.
- the door bolt 112 will move toward jam housing cam 172 and 174 in the direction designated 176 in FIG. 7.
- the bolt sleeve 132 moves a small distance and then contacts the jam housing cam 172 at 174.
- the jam housing cam 172 exerts a force on the bolt sleeve 132 in the direction designated 178, overcoming the tension of spring 134.
- This causes the bolt sleeve 132 to move in the direction 178, applying force to the actuating arm 168 of the intruder switch 152.
- the actuating arm 168 depresses the actuator button 170 of switch 152, closing its contacts. Now, since both switches 150 and 152 are closed, the buzzer 34 will be actuated by the battery 42, indicating the presence of an intruder.
- FIGS. 9 through 18 The structure shown in FIGS. 9 through 18 includes a door bolt housing 210, a door bolt 212, detector means 214 and alarm means which will not be discussed in detail as they are similar to that shown in FIGS. 1 through 9.
- the door bolt housing 210 is very similar to that shown in FIGS. 5, 6, 7, and 8 and includes a bolt channel 216 in which the bolt handle 218 travels.
- the door bolt housing 210 is fastened to the door by means of suitable fasteners 220.
- the door bolt 212 a generally straight rod, moves in the door bolt housing 210 as the door bolt handle 218 is moved from its unlocked position to the far right in the bolt channel 216 to the locked position with the door bolt handle 218 to the far left of bolt channel 216 in locking groove 222.
- the door bolt 212 is rotated as the door bolt handle 218 is placed in locking groove 222.
- the detector means 214 includes a detector switch 224, an intruder switch 226, a spring 228, shown in FIGS. 11 and 12, and a detector housing 230 to which the switches 224 and 226 are fastened by means of support bracket 232.
- the detector switch 224 has normally open contacts controlled by an actuator bat handle or button 234. When the actuator bat handle 234 is snapped away from its normal position, the contacts of switch 224 close. The normal position of the actuator bat handle or button 234 is toward the door jamb in FIG. 16. The contacts of intruder switch 226 are normally closed and are controlled by actuator button 236. When the actuator button 236 is depressed, the switch contacts of switch 226 open.
- the detector switch 224 and the intruder switch 226 are connected to the alarm means and power source by appropriate connecting means to form the electrical circuit of FIG. 18.
- the battery 42 is connected to the operating indicator lamp 36 through detector switch 224.
- the buzzer 34 is connected to the battery 42 I through detector switch 224 and intruder switch 226.
- the door bolt 212 when in the locked position enters the detector housing 230 through opening 238.
- a bolt cam 240 shown in detail in FIGS. 13 and 14 is located on the end of the door bolt 212 that enters the detector means housing 230.
- the bolt cam 240 is an L-shaped slot in the end of the door bolt to provide the correct actuating sequence of the detector switch 224.
- detector switch 224 When the door bolt 212 is in an unlocked position, detector switch 224 is not actuated because actuator bat handle 234 is not snapped by door bolt 212.
- the actuator bat handle 234 of switch 224 lines up with bolt cam 240 so as not to be actuated as shown in FIG. 16.
- the door bolt 212 engages the actuator button 236 of intruder switch 226 during the unlocked bolt movement before the bolt handle 218 is rotated down into locking groove 222. Therefore, as the bolt 212 is extended into the housing 230, intruder switch 226 is actuated first, opening its contacts. As the bolt is rotated into the locking groove 222, detector switch 224 is actuated and its contacts close. The battery 42 now appears across the operating indicator lamp 36 and the lamp is actuated. The buzzer 34 is not actuated because the switch contacts of the intruder switch 226 are open.
- the spring 228 is displaced by the bolt 212 as seen in FIGS. 12 and 15.
- the bolt 212 is under tension from spring 228, although no movement of the door bolt 212 will occur because the door bolt is held rigid by door bolt housing 210.
- the door bolt 212 will move away from the door jamb and opening 238 of housing 230 to the left in FIG. 15. As the door bolt 212 moves, the switch contacts of detector switch 224 remain closed. As the door bolt 212 is moved by the applied force of the intruder, actuator button 236 of switch 226 is released as the movement exceeds approximately one-half the thickness or diameter of the door bolt 212. When actuator button 236 of intruder switch 226 is released, the switch contacts close, placing the battery 42 across the buzzer 34, alerting the occupants that an intruder is present.
- spring 228 will force the door bolt 212 to the end of the opening 238 of housing 230 with the same results as force applied to the door.
- the door bolt 212 will move away from the actuator button 236 of switch 226, which closes its contacts and activates the buzzer 34. Therefore, whether the intruder applies force to the door or severs the bolt, the buzzer 34 will be activated.
- FIGS. 1 through 18 actuate an alarm when an intruder applies force to a door or severs the door bolt after the door bolt is in the locked position.
- the presence of an intruder is detected by the position of the door bolt.
- alarm means including a power source, an operating indicator and an alarm
- means for detecting the position of said door bolt including a detector switch and an intruder switch connected in circuit with said power source, operating indicator and alarm, said detector switch having normally open contacts, which are moved to a closed position when said door bolt is moved to a locked position, completing a circuit between said power source and indicator
- said intruder switch including normally open 7 switch contacts connecting said alarm to said power source through the contacts of said detector switch, an actuating arm controlling the opening and closing of said intruder switch contacts and a roller wheel fastened on said actuating arm and positioned for contact by said door bolt when the door bolt is in a locked position, movement of said door bolt in a manner other than normal opening or closing causing said intruder switch to complete an electrical circuit from said power source to said alarm.
- said door bolt housing assembly includes means for positioning said door bolt to depress and release the actuator button of said detector switch as said door bolt is placed in the locked position and to depress and release said actuator button as said door bolt is unlocked.
- alarm means including a power source, an operating indicator and an alarm
- means for detecting the position of said door bolt including a detector switch and an intruder switch connected in circuit with said power source, operating indicator and alarm, said detector switch having normally open contacts, which are moved to a closed position when said door bolt is moved to a locked position, completing a circuit between said power source and indica tor
- said intruder switch including a pair of normally open contacts, an actuator button controlling the opening and closing of said intruder switch contacts, and an actuator arm which, when displaced, actuates said actuator button
- said door bolt including a bolt sleeve fastened by'spring means on the end of said door bolt that enters said detecting means, with said detecting means including a housing having a jam housing cam, movement ,of said door bolt in a manner other than normal opening or closing causing said intruder
- alarm means including a power source, an operating indicator and an alarm
- means for detecting the position of said door bolt including a detector switch and an intruder switch connected in circuit with said power source, operating indicator and alarm, said detector switch having normally open contacts, which are moved to a closed position when said door bolt is moved to a locked position, completing a circuit between said power source and indicator
- said intruder switch including normally open switch contacts, with both said intruder switch and detector switch including an actuator button controlling the opening and closing of said switch contacts
- said alarm being connected to said power source through the contacts of said intruder switch and through the contacts of said detector switch
- said detector means including a spring applying force to said door bolt in a normal direction to the door
- said door bolt including a bolt cam at the end thereof extending into said detecting means, said bolt cam being arranged in said door bolt so as to contact said actuator button of said
- the structure of claim 12 further characterized in that said door bolt allows said actuator button of said intruder switch to be released when an intruder applies force to the door and said door bolt moves away from said actuating button of said intruder switch or when intruder severs said door bolt and said spring pushes said door bolt away from said actuator button of said intruder switch.
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- Burglar Alarm Systems (AREA)
Abstract
Description
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00301589A US3810145A (en) | 1972-10-27 | 1972-10-27 | Door bolt with electric alarm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00301589A US3810145A (en) | 1972-10-27 | 1972-10-27 | Door bolt with electric alarm |
Publications (1)
Publication Number | Publication Date |
---|---|
US3810145A true US3810145A (en) | 1974-05-07 |
Family
ID=23164024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00301589A Expired - Lifetime US3810145A (en) | 1972-10-27 | 1972-10-27 | Door bolt with electric alarm |
Country Status (1)
Country | Link |
---|---|
US (1) | US3810145A (en) |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3967080A (en) * | 1973-08-29 | 1976-06-29 | Deo Errani | Switch device for indicating the undue opening of doors and closing-wings |
US3993987A (en) * | 1975-03-03 | 1976-11-23 | Stevens Edward C | Locking device having an integral alarm system |
US4189692A (en) * | 1978-02-21 | 1980-02-19 | Bonnar John H | Lock controlled power shut-off system |
US4237711A (en) * | 1978-02-10 | 1980-12-09 | Brink's Locking Systems, Inc. | Lock mechanism |
US4283718A (en) * | 1979-07-02 | 1981-08-11 | Synco National Ltd. | Door alarm device |
US4465997A (en) * | 1981-01-26 | 1984-08-14 | Security Network International, Inc. | Exterior mounted door and window alarm switch |
US4640112A (en) * | 1983-08-08 | 1987-02-03 | R. R. Brink Locking Systems, Inc. | Security door knob and escutcheon |
US4644181A (en) * | 1983-03-10 | 1987-02-17 | Sace S.P.A. Costruzioni Elettromeccaniche | Automatic locking device for linkages subjected to undesirable mechanical stresses, applicable in particular to electrical switches |
US4758697A (en) * | 1983-11-04 | 1988-07-19 | Societe Internationale de Promotion Commerciale | Intermittent supply control device for electric appliances of in particular a hotel room |
US4845471A (en) * | 1987-09-22 | 1989-07-04 | Chu Kans C | Door lock |
US4969343A (en) * | 1987-06-15 | 1990-11-13 | Luker Graham J | Security locks |
US5041814A (en) * | 1990-06-20 | 1991-08-20 | Lin Fu Tong E | Lock with alarm device |
US5060582A (en) * | 1989-10-20 | 1991-10-29 | Salzer Sicherheitstechnik Gmbh | High security blast resistant door leaf |
US5311168A (en) * | 1992-09-10 | 1994-05-10 | Pease Industries, Inc. | Lock set with self-contained door alarm and annunciator system |
US5404735A (en) * | 1994-03-15 | 1995-04-11 | Hsieh; Chen-Kuei | Padlock with built-in anti-theft alarm device |
US5469139A (en) * | 1995-02-16 | 1995-11-21 | Ko; Joseph Y. | Door block alarm |
US5507160A (en) * | 1995-04-13 | 1996-04-16 | Shieh; Jin-Ren | Locking device for disk brake |
EP0798435A1 (en) * | 1996-03-27 | 1997-10-01 | Guy Prieur | Alarm striker |
US5825288A (en) * | 1996-12-11 | 1998-10-20 | Securitron Magnalock Corp. | Monitoring device for swinging deadlock |
US6020816A (en) * | 1998-03-02 | 2000-02-01 | Agozzino; Andrew | Door and window lock with burglar alarm |
EP1071214A1 (en) * | 1999-07-22 | 2001-01-24 | K.A. SCHMERSAL GmbH & Co. | Monitoring apparatus |
US6539760B1 (en) | 1999-05-24 | 2003-04-01 | K.A. Schmersal Gmbh & Co. | Monitoring device |
US20170284130A1 (en) * | 2012-03-09 | 2017-10-05 | Neology, Inc. | Tamper evident cargo container seal bolt lock |
US10145146B2 (en) | 2012-03-19 | 2018-12-04 | Neology, Inc. | Tamper evident cargo container seal bolt lock |
US10364592B2 (en) * | 2014-07-17 | 2019-07-30 | Schlage Lock Company Llc | Sensor assemblies for locks |
EP3594435A1 (en) * | 2018-07-11 | 2020-01-15 | ABUS August Bremicker Söhne KG | Alarm signaller for a door locking system |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2521005A (en) * | 1947-04-08 | 1950-09-05 | Theodore J Gundlach | Door switch for burglar alarm systems |
US2725437A (en) * | 1953-05-04 | 1955-11-29 | Westinghouse Electric Corp | Interlock switch mechanisms |
US3263040A (en) * | 1964-06-29 | 1966-07-26 | Harry F Bliven | Pressure operated circuit controlling devices operable on relative movement between two elements |
US3623062A (en) * | 1970-06-25 | 1971-11-23 | Minnesota Mining & Mfg | Lock alarm structure |
US3727210A (en) * | 1971-04-23 | 1973-04-10 | Minnesota Mining & Mfg | Lock and alarm device |
-
1972
- 1972-10-27 US US00301589A patent/US3810145A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2521005A (en) * | 1947-04-08 | 1950-09-05 | Theodore J Gundlach | Door switch for burglar alarm systems |
US2725437A (en) * | 1953-05-04 | 1955-11-29 | Westinghouse Electric Corp | Interlock switch mechanisms |
US3263040A (en) * | 1964-06-29 | 1966-07-26 | Harry F Bliven | Pressure operated circuit controlling devices operable on relative movement between two elements |
US3623062A (en) * | 1970-06-25 | 1971-11-23 | Minnesota Mining & Mfg | Lock alarm structure |
US3727210A (en) * | 1971-04-23 | 1973-04-10 | Minnesota Mining & Mfg | Lock and alarm device |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3967080A (en) * | 1973-08-29 | 1976-06-29 | Deo Errani | Switch device for indicating the undue opening of doors and closing-wings |
US3993987A (en) * | 1975-03-03 | 1976-11-23 | Stevens Edward C | Locking device having an integral alarm system |
US4237711A (en) * | 1978-02-10 | 1980-12-09 | Brink's Locking Systems, Inc. | Lock mechanism |
US4189692A (en) * | 1978-02-21 | 1980-02-19 | Bonnar John H | Lock controlled power shut-off system |
US4283718A (en) * | 1979-07-02 | 1981-08-11 | Synco National Ltd. | Door alarm device |
US4465997A (en) * | 1981-01-26 | 1984-08-14 | Security Network International, Inc. | Exterior mounted door and window alarm switch |
US4644181A (en) * | 1983-03-10 | 1987-02-17 | Sace S.P.A. Costruzioni Elettromeccaniche | Automatic locking device for linkages subjected to undesirable mechanical stresses, applicable in particular to electrical switches |
US4640112A (en) * | 1983-08-08 | 1987-02-03 | R. R. Brink Locking Systems, Inc. | Security door knob and escutcheon |
US4758697A (en) * | 1983-11-04 | 1988-07-19 | Societe Internationale de Promotion Commerciale | Intermittent supply control device for electric appliances of in particular a hotel room |
US4969343A (en) * | 1987-06-15 | 1990-11-13 | Luker Graham J | Security locks |
US4845471A (en) * | 1987-09-22 | 1989-07-04 | Chu Kans C | Door lock |
US5060582A (en) * | 1989-10-20 | 1991-10-29 | Salzer Sicherheitstechnik Gmbh | High security blast resistant door leaf |
US5041814A (en) * | 1990-06-20 | 1991-08-20 | Lin Fu Tong E | Lock with alarm device |
US5311168A (en) * | 1992-09-10 | 1994-05-10 | Pease Industries, Inc. | Lock set with self-contained door alarm and annunciator system |
US5404735A (en) * | 1994-03-15 | 1995-04-11 | Hsieh; Chen-Kuei | Padlock with built-in anti-theft alarm device |
US5469139A (en) * | 1995-02-16 | 1995-11-21 | Ko; Joseph Y. | Door block alarm |
US5507160A (en) * | 1995-04-13 | 1996-04-16 | Shieh; Jin-Ren | Locking device for disk brake |
EP0798435A1 (en) * | 1996-03-27 | 1997-10-01 | Guy Prieur | Alarm striker |
US5825288A (en) * | 1996-12-11 | 1998-10-20 | Securitron Magnalock Corp. | Monitoring device for swinging deadlock |
US6020816A (en) * | 1998-03-02 | 2000-02-01 | Agozzino; Andrew | Door and window lock with burglar alarm |
US6539760B1 (en) | 1999-05-24 | 2003-04-01 | K.A. Schmersal Gmbh & Co. | Monitoring device |
EP1071214A1 (en) * | 1999-07-22 | 2001-01-24 | K.A. SCHMERSAL GmbH & Co. | Monitoring apparatus |
US20170284130A1 (en) * | 2012-03-09 | 2017-10-05 | Neology, Inc. | Tamper evident cargo container seal bolt lock |
US10119301B2 (en) * | 2012-03-09 | 2018-11-06 | Neology, Inc. | Tamper evident cargo container seal bolt lock |
US10815694B2 (en) | 2012-03-09 | 2020-10-27 | Neology, Inc. | Tamper evident cargo container seal bolt lock |
US10145146B2 (en) | 2012-03-19 | 2018-12-04 | Neology, Inc. | Tamper evident cargo container seal bolt lock |
US10689882B2 (en) | 2012-03-19 | 2020-06-23 | Neology, Inc. | Tamper evident cargo container seal bolt lock |
US10364592B2 (en) * | 2014-07-17 | 2019-07-30 | Schlage Lock Company Llc | Sensor assemblies for locks |
EP3594435A1 (en) * | 2018-07-11 | 2020-01-15 | ABUS August Bremicker Söhne KG | Alarm signaller for a door locking system |
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Owner name: GENERAL INSTRUMENT CORPORATION, NEW YORK, NEW YORK Free format text: LICENSE;ASSIGNOR:OAK INDUSTRIES INC., A DE CORP.;REEL/FRAME:004761/0665 Effective date: 19870721 Owner name: GENERAL INSTRUMENT CORPORATION,NEW YORK Free format text: LICENSE;ASSIGNOR:OAK INDUSTRIES INC., A DE CORP.;REEL/FRAME:004761/0665 Effective date: 19870721 |
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Owner name: M/A-COM, INC., BURLINGTON, MASSACHUSETTS A CORP. O Free format text: LICENSE;ASSIGNOR:OAK INDUSTRIES, INC.;REEL/FRAME:004779/0629 Effective date: 19871028 Owner name: M/A-COM, INC., A CORP. OF MASSACHUSETTS,MASSACHUSE Free format text: LICENSE;ASSIGNOR:OAK INDUSTRIES, INC.;REEL/FRAME:004779/0629 Effective date: 19871028 |
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Owner name: ZENITH ELECTRONICS CORPORATION, GLENVIEW, IL A COR Free format text: LICENSE;ASSIGNOR:OAK INDUSTRIES, INC.;REEL/FRAME:005164/0006 Effective date: 19881102 |
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Owner name: ZENITH ELECTRONICS CORPORATION, A CORP OF DELAWARE Free format text: LICENSE;ASSIGNOR:OAK INDUSTRIES, INC.,;REEL/FRAME:005284/0010 Effective date: 19881102 |