Abstract:
A battery operated combination burglar alarm and door chime is mounted to the inside of a door. The alarm mode is capable of being armed from either side of the door. A dead bolt slide cooperates with a plate fastened to the door frame to manually arm the device from the inside with the door closed. A plunger slide also cooperates with the plate fastened to the door frame and a mode selection switch to effect either a chime mode or a delayed alarm mode when the door is opened. The delayed alarm mode being activated with the door open to permit pre-arming the device followed by automatic arming of the device when the door is closed. Depending upon the alarm mode of operation selected, unauthorized opening of the door can either lock the door and instantaneously sound an alarm or sound an alarm after a predetermined time when the door is opened. A combination switch deactivates the alarm and chime modes and another switch can alter the combination. An optional, independently powered smoke detector may be integrated with the above.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates to a battery operated burglar alarm in combination with a door chime adapted to a door or the like. Specifically, the device includes instantaneous and simultaneous mechanical locking and alarm means for internal security and mode selection means for achieving the door chime mode or the re-entry alarm delay mode. The above described device is an improvement in function and structure over my previously patented device described in U.S. Pat. No. 4,123,752 dated Oct. 31, 1978. 
     Many homeowners and apartment dwellers have limited choice in obtaining a versatile, inexpensive, simple-to-operate and install, door-mounted security device. Most effective security systems are costly hard-wired or wireless transmission types that require skill to install and are complex to operate or program. At the other end of the security spectrum are marginal door-mounted security devices that may be classified as &#34;gadgets.&#34; The novelty and utility in the combined function and structure of the present invention is to fill the door security void needed by the average homeowner and apartment dweller. It comprises a device that has the versatility to produce loud burglar alarm sounds or pleasant door chime tones and also provides for deadbolt security. The present invention, compared to my U.S. Pat. No. 4,123,752 device, integrates a door chime mode with the re-entry alarm delay security mode and is simpler to operate. In addition to the above modes of operation the device can readily incorporate a smoke detector sensing unit of existing manufacturers. This is particularly advantageous to condo and apartment dwellers who usually share a common vestibule for their entrance doors. Smoke traveling from an adjacent condo or apartment could accumulate in the common vestibule and flow under the door or other sources of door leakage and trigger the smoke detector in the door-mounted device. Thus, a condo or apartment dweller could be alerted to a fire in an adjacent unit. Full scale prototypes containing an available smoke detector sensing unit within the burglar and door chime device have proven this concept to be very practical. 
     SUMMARY OF THE INVENTION 
     Accordingly, beside the objects and advantages described in my U.S. Pat. No. 4,123,752, several objects and advantages of the present invention are: 
     a) to provide a door-mounted security device having three operating security modes and convenient switching means between operating modes, namely: 
     1) to instantaneously actuate a deadbolt lock and simultaneously sound an alarm when unauthorized opening of a door occurs. 
     2) to permit re-entry of an authorized person and allow sufficient delay time to de-arm the device and prevent the alarm from sounding. 
     3) to provide for a pleasant door chime tone mode to audibly monitor the opening and closing of a door during normal use. 
     4) to conveniently switch between the re-entry and chime security modes. 
     b) to provide a device that can be manufactured to adapt within its structure a known smoke detection sensing unit having its own battery. 
     c) to manufacture a device that consists of two main subassemblies, namely: a mechanical and an electrical subassembly that are readily joined together to comprise the final assembly. 
     d) to provide mechanical and electrical subassemblies that are complete by themselves and can be manufactured and tested independently of each other. 
     e) to provide a blinking light source visible from the front of the device that indicates the arming status of the instantaneous and delay arming modes. 
     It is a further object of the present invention to provide a novel, simple, compact, self-contained battery operated security device that is reliable in action, effective in use, and inexpensive to manufacture. 
     Another object of the invention is to provide a security device that is easily installed on a door by the average homeowner, condo or apartment dweller without requiring specialized installation tools, material, knowledge, technique of rework of the existing door and frame structure. 
     It is still another object of this invention to provide homeowners and particularly condo and apartment dwellers, who must leave and return to their premises daily, a convenient, simple and reliable alarm device for their doors that does not require additional keys or other separate means to arm or de-arm the device upon leaving or entering their premises and means to change the de-arming code as needed. 
     Another object of this invention is to provide a device, the location of which is readily accessible to the authorized person but is mounted in a relatively inaccessible or tamper-proof location to the unauthorized person. 
     Still, a further object of this invention is to provide means for making the present device inoperative during periods of normal use. 
     The above objects as well as other and further objects, features and advantages of the present invention will be manifest in the following detailed description and preferred embodiment thereof when read in connection with the accompanying drawings which form a part of this specification. However, it must be clearly understood that these descriptions and drawings are not to be construed as defining the limits of the invention, for which purpose reference is made to the appended claims. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a sectional view taken thru the slide and door mounted jamb plate as shown by section plane 1--1 of FIG. 2. 
     FIG. 2 is a front view of the battery operated burglar alarm and door chime taken from inside the front cover in accordance with section plane 2--2 of FIG. 3. 
     FIG. 3 is a top view of the device based on the section plane 3--3 of FIG. 2. 
     FIG. 4 is a partial right front view of the device showing the top end of the plunger in contact with the door jamb plate and the bottom end depressing the tab on the break-make spring return slide switch. 
     FIG. 5 is a partial right top view of the device showing the plunger and slide with the door jamb plate removed (View 5--5). 
     FIG. 6 is a sectional view taken thru the plunger and door jamb plate as shown by section plane 6--6 of FIG. 4. 
     FIG. 7 is a wiring diagram showing the various switches and other electronic components, in symbolic form, required to achieve the necessary operational modes for the burglar alarm and door chime. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Refer in detail to the drawings, wherin like and related numerals and symbols designate like and related parts throughout the several views. FIG. 1 shows a sectional view of the device mounted to a door 17 by means of a back plate 2, preferably fabricated of metal, using back plate screws 40 thru back plate screw holes 41. Mounted to back plate 2 is a printed circuit board 23 to which all switches, detailed electrical components, speaker and batteries with holder are fastened. Four backplate printed circuit board tabs 4 having &#34;V&#34; grooves 3 and shown in FIGS. 2 and 3 formed from back plate 2 secure printed circuit board 23 against back plate 2 by means of an interference fit with printed circuit board slots 48. As a result, the printed circuit board assembly constitutes a completely independent electrical subassembly that cooperates with adjacent mechanical components to achieve the various operational modes. 
     A front cover 11, also preferably fabricated of metal, fits over back plate 2 and is fastened to back plate 2 using front cover screws 43. A slide 19 fits thru the bottom and top surfaces of front cover 11 thru front cover slide slots 11A and 11B respectively to cooperate with a jamb plate 13 containing jamb plate slot 29 and fastened to door jamb 13A using jamb plate screws 13B. Slide 19 has a lower slide tab 24 made to fit with a lower front cover detent 25 at its lower end and has an upper slide tab 30 at its other end. A slide switch actuator 21 attached to slide 19 projects over a slide switch button 22A of a three-position instant lock-alarm slide switch 22. A slide switch actuator tab 21A of slide switch actuator 21 fits thru slide 19 by means of a slide tab slot 49. A slide spring 20 is attached to the end of slide switch actuator tab 21A and to the top end to upper front cover detent 20A. 
     FIGS. 4, 5 and 6 show a plunger bushing 10 fastened to the top of front cover 11 and containing a plunger 12 actuated by a plunger spring 14. The top part of plunger 12 is in contact with jamb plate 13 and the bottom part in contact with a plunger slide switch button 15A of a make-break chime and delay alarm spring return plunger slide switch 15. 
     Four On/Off power two-position slide switches 31 are fastened to printed circuit board 23 at its top edge. The On/Off slide buttons 31A of On/Off power two-position slide switches 31 protrude above the top of front cover 11 thru front cover top slots 50 for access. The three-position instant lock-alarm slide switch 22 is fastened to printed circuit board 23 and located to have its three-position slide switch button 22A in-line with the projections of slide switch actuator 21 that is fastened to slide 19. 
     The make-break chime and delay alarm spring return plunger slide switch 15 is also fastened to printed circuit board 23 and has its plunger slide switch button 15A located in-line and directly below and in contact with the bottom surface of plunger 12. 
     FIGS. 2 and 3 show a chime and delay alarm mode selection two-position slide switch 16 fastened to printed circuit board 23 at its top edge. The chime and delay alarm mode selection slide button 16A of chime and delay alarm mode selection two-position slide switch 16 protrudes above the top of front cover 11 thru a front cover top slot 51 for access. 
     A bottom battery holder 32 is fastened to printed circuit board 23 with a rivet 35 and stabilized with two battery holder key tabs 36 protruding thru two circuit board key tab clearance holes 37. Two batteries 8 and 8A are secured in place by a top battery holder 33 which fastens to battery holder 32 by snapping over and engaging two battery holder locking tabs 34. Battery 8 is electrically connected to printed circuit board 23 using two battery snap terminals 39 which in turn are mechanically fastened and electrically connected to printed circuit board 23. Battery 8 supplies power to the Burglar Alarm and Door Chime device. Battery 8A supplies power to the optional smoke detector sensing unit 1. Top battery holder tabs 38 prevent battery 8A from sliding out of position. 
     A light emitting diode 26 is fastened to printed circuit board 23 and transfers its light to the outside of front cover 11 by using a light conducting plastic cylinder 27 fastened to front cover 11 using a plastic cylinder retaining ring 28 and located in-line with light emitting diode 26. 
     A speaker clamp 44 is fastened to printed circuit board 23 using speaker clamp rivets 45. A speaker clamp screw 52 clamps a speaker 18 to a speaker clamp 44. A multitude of speaker sound transmitting holes 45A are located in front cover 11 and in-line with speaker 18. Three printed circuit board clearance holes 42 are provided for access to back plate screw holes 41. 
     Two front cover detents 53 of FIG. 3 located in the sides of front cover 11 provide for a fixed depth of assembly of back plate 2 with respect to front cover 11. 
     FIG. 7 shows a detailed electrical circuit schematic of the basic Burglar Alarm and Door Chime. Battery 8 supplies power to the Burglar Alarm and Door Chime device thru the four On/Off power two-position slide switches 31 to the three-position instant lock-alarm slide switch 22 and its circuitry, the chime and delay alarm mode selection two-position slide switch 16 and its circuitry, to the make-break chime and delay alarm spring return plunger slide switch 15 and its circuitry. All of the foregoing actuate speaker 18 with its circuitry to sound an alarm and flash light emitting diode 26. Four jumper pin switches 31B provide means to reverse the polarity of said four On/Off power two-position slide switches 31 and RC circuit 54 provides means to vary the entry delay time. 
     FIGS. 2 and 3 show an optional smoke detector sensing unit 1 fastened to back plate 2 and connected to battery 8A using snap cable 9. Four back plate smoke detector tabs 4A formed from back plate 2 and having &#34;V&#34; grooves 3A provide a snap interference fit with a smoke detector printed circuit board 1A to which all smoke detector components are mounted. A multitude of smoke detector vent holes 47 are provided in addition to a multitude of smoke detector sound transmitting holes 46 located in front cover 11. 
     A smoke detector light transmitting test plunger 5 is enclosed and captured by a smoke detector guide bushing 5A which is snap fastened to front cover 11. The smoke detector light transmitting test plunger 5 is piloted over a smoke detector light emitting diode 54 and is also located in line with a smoke detector sensing unit spring test contact 6 to enable contact with a smoke detector sensing unit fixed test contact 7 to check the working status of smoke detector sensing unit 1. 
     Operation of the Preferred Embodiment 
     The three modes of operation of the Burglar Alarm and Door Chime device are as follows: 
     1. Instant Lock-Alarm/Interior Security Mode: 
     Refer to FIG. 1 showing slide 19 in the &#34;un-armed slide position&#34; with door 17 closed. The four On/Off power two-position slide switches 31 are shown in FIG. 3 in a power &#34;Off&#34; mode with their slide tabs oriented toward the back plate 2. Move any one or several of the slide tabs toward the front cover 11 to effect the power &#34;On&#34; mode of the four On/Off power two-position slide switches 31. Disengage slide tab 24 of slide 19 from front cover detent 25 of front cover 11. Allow slide spring 20 to raise slide 19 until it engages the underside of jamb plate 13. During this movement slide switch actuator 21 of slide 19 will move slide switch button 22A of three-position instant lock-alarm slide switch 22 to the &#34;armed slide position&#34; from its original &#34;unarmed slide position.&#34; This slide position causes light emitting diode 26 to flash and transfer its light to the outside of front cover 11 by using light conducting plastic cylinder 27 fastened to front cover 11. The flashing light indicates to an authorized person located on the interior side of the secured area that the device is in the armed mode. Unauthorized opening of door 17 causes slide 19 to pass thru jamb plate slot 29 to achieve the &#34;instant lock-alarm position&#34; by effecting a dead bolt lock with jamb plate 13 and simultaneously moving slide switch button 22A of three-position instant lock-alarm slide switch 22 to sound speaker 18. Moving slide 19 back to the &#34;unarmed slide position&#34; and because the electric circuit was latched it will not cause speaker 18 to stop sounding. However, placing the four On/Off power two-position slide switches 31 in the one &#34;Off&#34; mode known only to the authorized person will cause the speaker 18 to cease sounding. 
     2. Delay Alarm/Exterior Security Mode: 
     Refer to FIGS. 2, 3 and 7 showing the four On/Off power two-position slide switches 31 in the one &#34;Off&#34; mode and the chime and delay alarm mode selection two-position slide switch 16 in the left slide position to effect the Delay Alarm/Exterior Security Mode. In this position jamb plate 13 depresses plunger 12 which further depresses plunger slide switch button 15A of make-break chime and delay alarm spring return plunger slide switch 15. Open door 17 from the interior area to be secured and with chime and delay alarm mode selection two-position slide switch 16 in the left slide position place the four On/Off power two-position slide switches 31 in one of fifteen &#34;On&#34; modes. Referring to FIGS. 6 and 7, opening door 17 will cause plunger 12 to clear jamb plate 13 and rise which also causes plunger slide switch button 15A of make-break chime and delay alarm spring return plunger slide switch 15 to rise and effect the pre-arm condition of the device. Light emitting diode 26 will commence flashing which further confirms the pre-arm condition of the Delay Alarm/Exterior Security Mode. The authorized person will then exit the interior area to be secured to the exterior area and close door 17. This action depresses plunger 12 by jamb plate 13 and causes the device to achieve the armed condition and light emitting diode 26 to cease flashing. Unauthorized opening of door 17 will cause speaker 18 to sound after a preset delay period and cause light emitting diode 26 to flash. Closing door 17 will not silence speaker 18 since the electric circuit is latched or cause flashing light emitting diode 26 to cease flashing. However, placing the four On/Off power two-position slide switches 31 in the one &#34;Off&#34; mode known only to the authorized person will silence speaker 18 and cause light authorized diode 26 to cease functioning and de-arm the device. 
     3. Door Chime Annunciator Mode: 
     Referring again to FIGS. 2, 3, 6 and 7 which show the four On/Off Power two-position slide switches 31 in the one &#34;Off&#34; mode and the chime and delay alarm mode selection two-position slide switch 16 in the left slide position to effect the Delay Alarm/Exterior Security Mode. However, to achieve the Door Chime Annunciator Mode, move chime and delay alarm selection two-position slide switch 16 to the right slide position and place the four On/Off power two-position slide switches 31 in any one of the fifteen &#34;On&#34; modes. Opening and closing door 17 will alternately raise and lower plunger 12 in conjunction with plunger slide switch button 15A of make-break chime and delay alarm spring return plunger slide switch 15 to cause speaker 18 to emit pleasant chime tones. 
     4. Optional Smoke Detector Sensing Unit: 
     FIGS. 2 and 3 show an optional, independently powered smoke detector sensing unit 1 of known manufacture mounted to back plate 2. Smoke passing thru smoke detector vent holes 47 in front cover 11 will trigger the smoke detector to sound thru transmitting holes 46 also located in front cover 11. Pressing smoke detector light transmitting test plunger 5 checks the functionality of smoke detector sensing unit 1 by sounding its horn. Periodic flashing of light from light emitting diode 54 and transmitted to the tip of light transmitting test plunger 5 is a further indication of the unit&#39;s proper functionality. 
     While my above description contains many specificities, these should not be construed as limitations on the scope of the invention, but rather as an exemplification of one preferred embodiment thereof. Many other variations are possible. For example, the front cover 11 and back plate 2 may be fabricated of suitable plastics. Rocker or magnetic actuated switches may be substituted for the slide switches where applicable. Also, the number of power On/Off switches may vary from the four switches shown. A piezo-electric speaker may be used instead of the magnetic/coil type. Also, the slide 19 may be cylindrical in cross-section instead of rectangular and so forth. Accordingly, the scope of the invention should be determined not by the embodiment illustrated, but by the appended claims and their legal equivalents.