FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2006
PROVISIONAL SPECIFICATION
[See section 10, Rule 13]
1. TITLE OF THE INVENTION: A PRE-WARNING SYSTEM FOR A MOVABLE PARTITION
2 APPLICANT(S):
Name: INTELLILOGOS CONSULTING LLP
Nationality: Indian
Address: 202 Mary Anne heights, 3rd Golibar Road, Santa Cruz East,
Mumbai, 400055, India
3. PREAMBLE TO THE DESCRIPTION
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED

Field of the Invention
The present invention relates in general to motion detectors and more particularly, to devices mounted on a door powered by one or many sensors to detect movement of a person in a room, and provide anindication of same to an observer outside the room.
Background of the Invention
Systems and methods are known in the art to detect the presence of a person or object at the entrance of an automatic door. These systems usually include infrared (IR) and/or microwave detector above the door which registers the increase of frequency of the emitted beam returning to the detector as a person moves towards the entrance, and more generally sense the motion coming from the objects to be detected.
Specifically, doors are not provided with windows as a commercially viable option and consequently a person about to operate a door from one side is unable to determine whether or not a person is on the other side of the door. In situations where a door opens outwardly into an area into which visual access is not possible with the door is closed, there is always the potential that the opening of the door may strike a person present on or approaching the other side of the door or cause them to drop articles which they may be carrying.
Further, everyday people have had at least one experience of knocking on a closed restroom door only to hear the voice of someone inside announcing that the room is occupied. This is often embarrassing to the knocker as well as the occupant. Such a scenario is typical in hotels with unhinged doors, or in environments having single person restrooms, as is typical in many small and medium size work places throughout India.
While it is known in the art to use such systems on both sides of a pivoting door for example so as to prevent the door from striking a person arriving on one side thereof while the door is caused to open by another person on the other side, however such systems are unable to provide an advance warning to the persons on either side of the door of the possibility of the door being opened by either of the persons on either side.

Therefore, it is a need to have a mountable alert system fixable on a door which is able to sense occupation and movement on the either side and timely provide an advance indication
Summary of the invention
It is an object of this invention to provide a pre-warning system that indicates proximity of a person to the door, and which indicates whether an enclosure covered by a door is occupied.
It is an object of this invention is to provide a pre-warning system which can indicate to a person inside of the room or area of audio-visual cues of proximity of other persons on the other side of the door.
It is an object of this invention to provide a pre-warning system that is effective and easy to install.
It is an object of this invention to build a pre-warning system that is not only area-agnostic, is cheap to manufacture and can be easily and quickly be installed on a door.
It is an additional object of this invention is to provide such a device which can indicate the status of whether or not the room or area is occupied to a distant observer.
These objects, and other objects expressed or implied in this document, are accomplished by a pre-warning system for providing an indication observable by a person located outside of an area which is partially bordered by a door.
The present invention comprises of a pre-warning system to provide an alert related to presence of a user beyond line of sight, the pre-warning system installed adjacent to a movable partition that enables access to an enclosure. The pre-warning system includes a first detector module positioned adjacent to an anterior side of the partition and a second detector module communicably coupled to the first detector module and positioned adjacent to a posterior side of the removable partition, the anterior side

being positioned within the enclosure.The first and the second detector module further comprises of atleast a sensor adapted to detect presence of the user, and atleast an alert module adapted to provide the alert upon presence of the user being detected. The invention is capable of providing alerts pursuant to the presence of user being detected by the sensor of the first detector module or the second detector module.
The combination of sensors in pre-warning system of the present invention includes one of an infrared sensor, a PIR sensor, ultrasonic detection sensor, optical obstacle sensor and a combination thereof.
An alert module of the pre-warning system of the present invention provides a visual or audio or audio visual alert.
Other advantages and attributes of this invention will be readily discernable upon a reading of the text hereinafter.
Brief Description of the Drawings
Fig. 1 is a pictorial view of the prewarning system installed on a movablepartition in accordance with an embodiment of the present invention.
Fig. 2 is another pictorial view of this prewarning system of Fig. 1.
Fig. 3illustrates a detector module of the prewarning system of Fig. 1
Fig. 4 illustrates a circuit diagram of the detector module of Fig. 3.
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not necessarily to limit the invention to the particular embodiments, aspects and features described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention and as defined by the appended claims.

Detailed description of the invention
Fig. 1-3 of the present invention represents an exemplary embodiment of the present invention, depicting an enlarged partial view of a pre-warning system mountable either on or relative to an anterior A and posterior P sides of a partition 2. As shown in Fig. 1, the partition 2 enables access to an enclosure 4 to accommodate persons .The posterior side P and anterior sides are considered in respect of the proximity relative to the enclosure. For the purpose of explanation, Fig. 1 depicts the anterior portion A of the partition 2, which is away from the enclosure 4. The partition 2 could be a door in an embodiment of the present invention such that the partition 2 is movable so as to enable access to within the enclosure 4. For instance, the enclosure 4 could be a bathroom/toilet room and the partition 2 could be a pivotable door that pivots about an axis to close/open so as to enable access to the enclosure. The system includes a first detector module 1001 positioned on the anterior side A of the partition 2 and a second detector module 1002 mounted on the posterior side P of the partition 2, as shown in Fig. 2. In an embodiment of the present invention, as shown in Fig. 3, each of the first and the second detector modules (1001 and 1OO2) include a compact portable sealed housing having a curvoid mount 107 in which is housed electronic components on a base 108 as will be described in detail below.
Referring Figs. 1-2, in the present representation, the first and the second detector modules 1001 and 1002 are capable of being wirelessly connectible and one of the detectorsfaces into the room or the areas in which the intended sensing is to be performed. The connection between the detectors could also be through wired connection. This makes sure that the embodiments are mountable on any portion of the door such that the opening or closing of the door will not face any difficulties therein. In an exemplary embodiment and in a different setting, there could be multiple devices fixed anywhere on the door. In another embodiment of the present invention, the detector modules could also be mounted adjacent to the partition 2 or relative to the partition 2. For instance, referring to Fig. 1, the detectors could be placed on the anterior and posterior sides of wall W of the enclosure instead of the partition 2.

Referring back to Fig. 3, in an embodiment of the present invention, the curvoidcasing 107 has a basel08 in which a curvoid reflector is mounted. One or multiple sensorslOl are built in within the casing 107 to be able to sense a person inside the room. In an embodiment of the present invention, the sensor may include one of an infrared sensor ('IR'), a pyroelectric infrared (PIR) sensor, ultrasonic detection sensor, optical obstacle sensor and a combination thereof. In an embodiment of the present invention using IR sensor, the reflector may be used to redirect and focus, i.e., magnify infrared radiation onto the window of an infrared sensor 101to detect the presence or movement of a person in the reflector's field of view. The sensor 101 is mounted at the inside end of the reflector with its window in the focus area of the reflector. Infrared radiation 102 emanating from a person in the sensing area enters the open end of the reflector 108 and is reflected by the inside walls up to the window of the infrared sensor 101.
In an exemplary embodiment of the present invention, the reflector is placed in a way, downward if the embodiment is placed on the top of the door or across the room or desired sensing area to acquire positive gain as well as detect children and toddlers (who have smaller heights). The vertical angle of the reflector surface's long axis with the door is preferably between zero (aimed downward and parallel with the door) and forty-five degrees depending on the height at which the sensor is mounted on the door, the size of the area being monitored, the portion of the area in which a person is most likely to be while in the area. The distance that the sensor is set back from the open end of the reflector is primarily determined by a trade-off between gain and the viewing angle of the sensor window; setting the sensor further back reduces the viewing angle but increases gain up to a point.
Referring to Fig. 3 and Fig. 4, the detector 100 is preferably powered by a battery 106, which can provide power for periods exceeding several years of typical use. The battery 106 may be a rechargeable and/or a removable battery. Power is supplied continuously once the batteries are installed.
The operation of the pre-warning system would be explained with reference to the detector 1OO2 positioned on posterior side of the partition 2. In operation, the detector 1002(in Fig. 1) detects presence and/or movement of a person within the enclosure 4

by the combination of sensors 101. Particularly, an infrared signal 102 owing to presence of a person activates the sensor 101, which in turn informs a control circuit or a processor110 of this movement. During the next few seconds of operation, the control circuit 110 looks for a movement signal from the sensor circuitry 101 to ascertain the presence of a person in the room or sensing area, and to latch flashing of the LEDs 109. In particular, movement of the person inside the enclosure triggers the infrared sensor 101, which is detected by the control circuit 110 to activate the LEDs 109. In an exemplary embodiment, other indicating devices along with LEDs generating cues which may also be audio or visual or a combination of audio and visual cues, may also be installed. The pre-warning system includes the detector 1001 positioned on the anterior side of the partition 2 as shown in Fig. 1. Both the detectors 100a and 1002 are communicably coupled to each other, preferably wirelessly using communication module 103 of each of the detectors. The communicable coupling enables the detector 1002 to provide a signal to the detector 1001 upon a presence/movement of a person being detected on the posterior side of the partition 2 by the detector 1002.. Consequent to the signal being received by the detector 1001, the LEDs 109 of the detector 1001 are also activated, thereby providing a visual indication to any person approaching the partition 2 on the anterior side thereof, i.e. outside the enclosure 4, about the presence of the occupant inside the enclosure and on the other side of the partition 2. Thus, by looking at the LED 109 of the detector 1001, the approacher person (outside the enclosure 4) is cautioned that there is an occupant in the enclosure and also that the occupant may open the partition 2 anytime. Similarly, by looking at the LED 109 of the detector 1002, the occupant of the enclosure 4 becomes aware that the approacher person is approaching the partition 2 and hence the occupant may be motivated to open the partition 2 cautiously. The pre-warning system of the present invention, thus, prevents a situation where any of the occupant or the approacher person may open the partition vigorously, thereby hurting the approacherpersonor the occupant, as the case may be, on the other side of the partition 2.
In an embodiment of the present invention, there could be more than one detector 1001 and 1002 on either side of the partition 2. For instance, there could be one detector 1002 that is communicably coupled to several detectors 1001 outside the

enclosure 4 located at different places to give indications about the enclosure 4 being occupied.
In another embodiment of the present invention, the pre-warning system may be coupled to a server to log in different metrics regarding usage of the system, such as opening/closing of partition, time durations of occupancy of the enclosure 4, tracking active usage timings of the enclosure 4 and the like for analysis to optimize user behaviour and/or regulation of energy usage.
The limited detection period of a few seconds is generally plenty of time for a person to depart from the inside of the closed door, and it reduces the chances of false indicator latching caused by environmental influences or other variables. Once latched, the cues will continue until the door once again opens which will be indicated by the absence of signal 102. Once the control circuit begins flashing the LEDS, the signal 102 from the sensor circuitry no longer plays a part until the door has been re-opened and once again closed.
In an exemplary embodiment, in a door covering a closed space such as restrooms, the control circuit also preferably controls the sensitivity of the sensor circuitry by means of generating attenuator signals which increases its gain when the door is closed but decreases it substantially when the door is opened. The substantially reduced gain prevents false sensor signals which might otherwise be caused by variations in background radiation such as IR radiation that the sensor might encounter when it is being moved by the door.
In another exemplary embodiment of the present invention, the invention includes a transmitter such as bluetooth transmitter, which receives signals from the control circuit including an "unoccupied" signal indicating when the door is open, and an "occupied" signal indicating when the door is closed and a person has been sensed in the room during the time delayed sensing window. In response, the transmitter broadcasts corresponding signals to one or more remote receiverseach of which can also include a device for remembering at least an "occupied" signal and a LED 109, or other indicating device, or other indicating cues for indicating receipt of an "occupied" signal. This arrangement can provide multiple and remote indications of

whether a room or sensing area is occupied. For example, a receiver can be located on the desk of a guard or receptionist to keep them informed as to if and when an out-of-sight room, such a restroom, is occupied. As another example, sensors located on the doors of multiple examining rooms of a medical clinic can all uniquely broadcast "occupied" and "unoccupied" signals to a centrally located receiver having multiple corresponding "occupied" indicators. This would be very helpful to a person who assigns the rooms to patients.<>
Fig. 4 illustrates a circuit diagram employed in the detectors 1001 and 1002. As is shown, a sensor 101 is communicably coupled to the processor or control circuit 110, which in turn is coupled to the LED 109 and optionally, an alarm 104 to provide audio alerts. The processor 110 is also coupled to communication module 103, which enables the detectors 1001 and 1002 to be communicably coupled to each other for sharing information about the occupant or the approacher person approaching the partition 2 to open it. The circuit diagram also depicts a memory 105 coupled to the processor 110. The circuit diagram is powered by a battery 106, which may be rechargeable and/or removeable.
The foregoing description and drawings were given for illustrative purposes only, it being understood that the invention is not limited to the embodiments disclosed, but is intended to embrace any and all alternatives, equivalents, modifications and rearrangements of elements falling within the scope of the invention as defined by the following claims. For example, the lever switch could be replaced by any kind of switching device capable of generating a signal which is distinguishable between when a door is open and when it is closed. Further, the invention could mounted on a door by any fastening means, not necessarily the L-shaped bracket as disclosed herein, as long as there is some path of communication between the sensing circuit on the inside of the door and an indicator outside the door.

We claim:
1. A pre-warning system positioned on or relative to an anterior and posterior
sides of a movable partition enabling access into an enclosure, to provide an
alert related to presence of a user beyond line of sight, the pre-warning system
comprising:
at least one first detector module positioned on an anterior side of the movable partition and at least one second detector module communicably coupled to the at least one first detector module and positioned on a posterior side of the removable partition, the posterior side being positioned within the enclosure, each of the first and the second detector module comprising:
atleast a sensor adapted to detect presence of the user, and atleast an alert module adapted to provide the alert upon presence of the user being detected, wherein pursuant to the presence of user being detected by the sensor of the first detector module, the alert module of the second detector module provides an alert, and
wherein pursuant to the presence of user being detected by the sensor of the second detector module, the alert module of the first detector module provides an alert.
2. The pre-warning system as claimed in claim 1, wherein the sensor comprises one of an infrared sensor, a PIR sensor, ultrasonic detection sensor, optical obstacle sensor and a combination thereof.
3. The pre-warning system as claimed in claim 1, wherein the alert module provides a visual alert.
4. The pre-warning system as claimed in claim 1, wherein the alert module provides an audio alert.
5. The pre-warning system as claimed in claim 1, wherein the first and the second detector module are powered by battery.

6. The pre-warning system as claimed in claim 5, wherein the battery is rechargeable and removable.
7. The pre-warning system as claimed in claim 1, wherein the at least one first and the at least one second detector is communicably coupled to a server to log the operation thereof.