GB2170340A

GB2170340A - Forged banknote detector

Info

Publication number: GB2170340A
Application number: GB08502344A
Authority: GB
Inventors: Garry Robert Langridge
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-01-30
Filing date: 1985-01-30
Publication date: 1986-07-30
Also published as: GB8502344D0

Abstract

The device works by the means of a light bulb 12 in conjunction with a variable resistor 13 and a pressure switch 11. The banknote being tested is stretched out flat and placed on the viewing plate 2. The top half 1 containing the viewing plate 2 is pushed down to activate the pressure switch 11 and light up the viewing plate 2 and thus the note being tested. <IMAGE>

Description

SPECIFICATION Detection of forged banknotes This invention relates to a device which detects forged banknotes.

This device detects forged banknotes and absence of a watermark in paper by the means of light. The device consists of a light bulb which is operated by the means of a pressure switch via a variable resistor all of which is encased in a flat oblong box which is divided in half horizontally (see Fig. 1). The testing of a banknote is by placing the banknote on the viewing plate (Fig. 1,2) pushing down on viewing plate (Fig.

1,2) which activates the light bulb (Fig. 2). The light shinesthroughtheviewing plate (2) and lights upthe banknote.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which: Fig. 1 shows in perspective the detector.

Fig. 2 illustrates the wiring and component positions.

Fig. 3 illustrates base section.

Fig. 4 illustrates top section.

Fig. 5 illustrates fixing fortop and bottom sections.

Fig. 6 illustrates position of top and bottom sections when in operation.

Referring to the drawing the device comprises of two basic halves as illustrated in Fig. 1.

The device is primarly constructed of plastic. The support post Sfor spring 7 along with lamp holder 1 and wire clip holder 14 are moulded in one along with bottom half 4.

Top half 1 and bottom half4 are heldtogether by moulded grips 8 and 9 as illustrated in Fig. 5. When the top half 1 is pushed down when in operation grip 9 moves down away from grip 8 compressing spring 7 (see Fig. 6).

The device works by the means of a pressure switch 13. Put the note being tested on the viewing plate 2, stretch outflat and push down equally on all four corners with both thumbs and index fingers. This activates the light bulb 12 via pressure switch 11 and a varible resistor 13. The lightshinesthrough viewing plate 2lighting up the note being tested.

1. Thedevicewhich detectsforged banknotes by the means of light using a pressure switch a varible resistor and light bulb connected to a mains supply encased in a flat oblong box.

2. Adevicewhich detects forged banknotes as claimed in claim 1 wherein the varible resistorwhich controlsthe lightintensitythrough the viewing plate by the means of a knob on the side of the bottom half the detector.

3. A device which detects forged banknotes as claimed in claim 1 or claim 2 wherein the adjustable light shines through the viewing plate of the detector which is incorporated on the top half that also acts as a switch when pushed down.

4. A device which detectsforged banknotes as claimed in claim 3 wherein the two halfs ofthe device is held together by moulded grips (as illustrated in 5,3,2 and 1).

5. A device which detects forged banknotes as claimed in claim 4wherein four support posts in conjunction with four springs and plastic grips hold the top awayfrom the bottom half containing the pressure switch.

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Detection of forged banknotes This invention relates to a device which detects forged banknotes. This device detects forged banknotes and absence of a watermark in paper by the means of light. The device consists of a light bulb which is operated by the means of a pressure switch via a variable resistor all of which is encased in a flat oblong box which is divided in half horizontally (see Fig. 1). The testing of a banknote is by placing the banknote on the viewing plate (Fig. 1,2) pushing down on viewing plate (Fig. 1,2) which activates the light bulb (Fig. 2). The light shinesthroughtheviewing plate (2) and lights upthe banknote. A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which: Fig. 1 shows in perspective the detector. Fig. 2 illustrates the wiring and component positions. Fig. 3 illustrates base section. Fig. 4 illustrates top section. Fig. 5 illustrates fixing fortop and bottom sections. Fig. 6 illustrates position of top and bottom sections when in operation. Referring to the drawing the device comprises of two basic halves as illustrated in Fig. 1. The device is primarly constructed of plastic. The support post Sfor spring 7 along with lamp holder 1 and wire clip holder 14 are moulded in one along with bottom half 4. Top half 1 and bottom half4 are heldtogether by moulded grips 8 and 9 as illustrated in Fig. 5. When the top half 1 is pushed down when in operation grip 9 moves down away from grip 8 compressing spring 7 (see Fig. 6). The device works by the means of a pressure switch 13. Put the note being tested on the viewing plate 2, stretch outflat and push down equally on all four corners with both thumbs and index fingers. This activates the light bulb 12 via pressure switch 11 and a varible resistor 13. The lightshinesthrough viewing plate 2lighting up the note being tested. CLAIMS