EP0033661A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A thief detection device
Assignee: Individual
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Filing: 1981-02-03
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Granted: —
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Expires: 2001-02-03
Abstract
Abstract thief detection aid system utilizing an explosive device activated upon occurrence of abnormal conditions to disseminate a marking dye after a predetermined delay and to transmit a signal to assist in apprehension of the thief, and wherein the device simulates a bundle 11 of banknotes and is hollow at 15 to contain a battery electrical circuitry including an electromagnetic sensor for detecting an electromagnetic field indicative of the presence of an abnormal condition, a transmitter in a reinforced compartment, a store 16,17 of dye and associated detonator, a switch for activating the detonator aswell asthetransmitter, and time delay means to delay activation of said detonator.
Inventors
- 👤 George King
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 21:06
CPC Classifications
G; G08; G08B; G08B15/00; G08B15/02; G08B13/00; G08B13/02; G08B13/14
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
150 words
A thief detection aid device characterized by a hollow housing (10) constructed to simulate the external appearance of a bundle (11) of banknotes, electrical solid state circuitry together with individual power supply within the housing and including an electromagnetic sensor (Fig. 3) and an output switch (27) responsive thereto, a detonator charge associated with disseminating dye (16 and 17) within the housing and activated by said switch, timing means (26) imposing a predetermined delay in activation of said detonator charge after energization of said sensor, and a signal transmitter (Fig. 5) within a reinforced compartment within the housing for protection against damage to said transmitter with activation of said detonator and also being activated by said electromagnetic sensor, whereby passage from a quiescent to an active state of the device occurs with electromagnetic energization of said sensor and signal contact with the device is maintained after detonation of said charge.
Claim 2
Dependent Claim
150 words
A thief detection aid device characterized by a hollow housing (10) constructed to simulate the external appearance of a bundle (11) of banknotes, electrical solid state circuitry together with individual power supply within the housing and including an electromagnetic sensor (Fig. 3) and an output switch (27) responsive thereto, a detonator charge associated with disseminating dye (16 and 17) within the housing and activated by said switch, timing means (26) imposing a predetermined delay in activation of said detonator charge after energization of said sensor, and a signal transmitter (Fig. 5) within a reinforced compartment within the housing for protection against damage to said transmitter with activation of said detonator and also being activated by said electromagnetic sensor, whereby passage from a quiescent to an active state of the device occurs with electromagnetic energization of said sensor and signal contact with the device is maintained after detonation of said charge.
Claim 3
Dependent Claim
77 words
A thief detection aid device as claimed in claim 1, characterized in that said electromagnetic sensor (Fig. 3), output switch (23) and timing means (26) are incorporated in a tuned receiver (Fig. 3) comprising sensing means (19 to 25) for detecting the presence in the vicinity of said device of an electromagnetic field corresponding in frequency to that to which said receiver is tuned to produce a signal transmitted via said timing means to said output switch.
Claim 4
Dependent Claim
43 words
A thief detection aid device as claimed in claim 2, characterized in that said sensing means (19 to 25) includes a decoder (25) to ensure that said receiver responds to produce said signal only when said field is characterized by a predetermined code.
Claim 5
Dependent Claim
39 words
A thief detection aid device as claimed in any one of the preceding claims, characterized in that said transmitter (Fig. 5) transmits at UHF frequencies and comprises a microphone (29) and functions to transmit neighbouring sound from said device.
Claim 6
Dependent Claim
116 words
Thief detection aid equipment characterized by a hollow device (8) externally simulating a bundle (11) of b anknotes and containing an electrical battery; electrical solid state circuitry including an electromagnetic sensor (19 to 25) and a signal transmitter (Fig. 5) activated therefrom; switching means (27) activated through energization of said electromagnetic sensor; a dye reservoir (16 and 17); a detonator for disseminating said dye and being activated by said switching means; a time delay unit (26) ensuring activation of said detonator occurs upon lapsing of a predetermined time period from energization of said electromagnetic sensor; and a source (Fig. 4) of an electromagnetic field for energizing said electromagnetic sensor upon the occurrence of an abnormal condition.
Claim 7
Dependent Claim
116 words
Thief detection aid equipment characterized by a hollow device (8) externally simulating a bundle (11) of b anknotes and containing an electrical battery; electrical solid state circuitry including an electromagnetic sensor (19 to 25) and a signal transmitter (Fig. 5) activated therefrom; switching means (27) activated through energization of said electromagnetic sensor; a dye reservoir (16 and 17); a detonator for disseminating said dye and being activated by said switching means; a time delay unit (26) ensuring activation of said detonator occurs upon lapsing of a predetermined time period from energization of said electromagnetic sensor; and a source (Fig. 4) of an electromagnetic field for energizing said electromagnetic sensor upon the occurrence of an abnormal condition.
Claim 8
Dependent Claim
43 words
Thief detection aid equipment as claimed in claim 5, characterized in that said source of an electromagnetic field is a further transmitter (Fig. 4) for creating said field about a fixed protected area through which said device is not intended normally to pass.
Claim 9
Dependent Claim
45 words
Thief detection aid equipment as claimed in claim 5, characterized in that said source of an electromagnetic field is a radio frequency command transmitter ( F ig. 6) provided with a manual activating control (49) to transmit an electromagnetic signal for energization of said sensor.
Claim 10
Dependent Claim
45 words
Thief detection aid equipment as claimed in claim 5, 6 or 7, characterized in that said sensor is a tuned receiver (Fig. 3 or Fig. 7), and said receiver and said source of an electromagnetic field include means for communication therebetween by a coded signal.
Claim 11
Dependent Claim
30 words
A thief detection aid device substantially as herein described with reference to Figs. 1, 3, 4 and 5 or to Figs. 2, 5, 6 and 7 of the accompanying drawings.
Claim 12
Dependent Claim
30 words
A thief detection aid device substantially as herein described with reference to Figs. 1, 3, 4 and 5 or to Figs. 2, 5, 6 and 7 of the accompanying drawings.
Claim 13
Dependent Claim
29 words
Thief detection aid equipment substantially as herein described with reference to Figs. 1, 3, 4 and 5, or to Figs. 2, 5, 6 and 7, of the accompanying drawings.
Claim 14
Dependent Claim
29 words
Thief detection aid equipment substantially as herein described with reference to Figs. 1, 3, 4 and 5, or to Figs. 2, 5, 6 and 7, of the accompanying drawings.
References Cited (Backward Citations)
No citation records indexed.
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