PATENT CLAIM ANALYSIS

Application Number: 15886732
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-06
Patent Classification: ["340", "540000"]

Abstract:
An apparatus for protecting an entrance to a protected area comprises a magnetic sensor to measure an ambient magnetic field or gradient within a first zone of sensitivity at a non-magnetic sensor means adapted to detect the presence of objects within a primary detection zone, a signal processing circuit arranged in communication with the magnetic sensor apparatus and nonmagnetic sensor apparatus, and a warning device operable by an output signal from the signal processing circuit, the warning device adapted to provide an alarm. The signal processing circuit identifies temporal variations due to the movement of a ferromagnetic object within the ambient magnetic field and correlates them with instances in which the non-magnetic sensor means detects the presence of an object in its detection zone, and causes the alarm to operate in the event that the correlation is indicative of the presence of a ferromagnetic object in the primary detection zone. It also determines the direction from which an object is approaching the using signals from the non-magnetic sensor means and modifies the operation of the warning device dependent on the direction.

Claim (Index 10):
Apparatus for protecting an entrance to a protected area comprising:\n at least one magnetic sensor adapted to measure an ambient magnetic field or gradient within a localised volume of space defined by a first zone of sensitivity of the at least one magnetic sensor, and to produce a corresponding measurement signal, a nonmagnetic sensing means adapted to detect the presence of objects within a detection zone in the vicinity of the at least one magnetic sensor, a signal processing circuit arranged in communication with the at least one magnetic sensor and the non-magnetic sensor means, and a warning device operable by an output signal from the signal processing circuit, the warning device adapted to provide within the vicinity of the at least one magnetic sensor at least one of an audible and a visible warning, wherein the signal processing circuit is configured to identify temporal variations in the measurement signal due to the movement of a ferromagnetic object within the ambient magnetic field and to correlate the identified temporal variations in the measurement signal with instances in which the non-magnetic sensor means detects the presence of an object in the zones, and to cause the warning device to raise an alarm in the event that the correlation is indicative of the presence of a ferromagnetic object in the vicinity of the at least one magnetic sensor; and further comprising: a door position sensing means which is adapted to monitor the angular position of the doorway, and and further comprising a memory which in use stores historical temporal variations in the measurement signal due to movement of a ferromagnetic object within the ambient field, and correlation means which is adapted to correlate the stored historical temporal variations in the measurement signal prior to the door moving with incidences in which the non-magnetic sensing means detects the presence of an object in its detection zone, and in which the apparatus is arranged to cause the warning device to raise an alarm in the event that the correlation, albeit separated in time, is indicative of the presence of a magnetic object in the vicinity of the at least one magnetic sensor.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 88.0
- Lexical Diversity: 2.2381
- Patent Class: 340.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14438354', '15886706', '15643239', '15036745', '13817779']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7391374167517315
- 35 USC 102 Novelty (BERT): 0.5287691163791286
- Combined Prediction Score: 0.7181005867144712
- Mean Citation Score: 335.59572799999995
- Max Citation Score: 349.05057
- Similarity Product: 311.9853594797624

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test