ES253233U - Metal detector device applicable to doors and similar. (Machine-translation by Google Translate, not legally binding) - Google Patents

Metal detector device applicable to doors and similar. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES253233U
ES253233U ES1980253233U ES253233U ES253233U ES 253233 U ES253233 U ES 253233U ES 1980253233 U ES1980253233 U ES 1980253233U ES 253233 U ES253233 U ES 253233U ES 253233 U ES253233 U ES 253233U
Authority
ES
Spain
Prior art keywords
doors
amplifier
metal detector
meter
applicable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
ES1980253233U
Other languages
Spanish (es)
Other versions
ES253233Y (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIDEVAN SA
Original Assignee
SIDEVAN SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SIDEVAN SA filed Critical SIDEVAN SA
Priority to ES1980253233U priority Critical patent/ES253233Y/en
Publication of ES253233U publication Critical patent/ES253233U/en
Application granted granted Critical
Publication of ES253233Y publication Critical patent/ES253233Y/en
Expired legal-status Critical Current

Links

Landscapes

  • Geophysics And Detection Of Objects (AREA)

Abstract

1.a metal detector device applicable to doors and the like, characterized in that the sides of the door comprise two inductor coils, one receiver and another transmitter that is powered by a two-stage amplifier connected by its input to the first, resulting in this auto system - oscillating by the great gain of the amplifier and by the coupling between said bonines, whose device also comprises a detector circuit powered from the output of the amplifier and consisting of a detection meter equipped with adjustable means for triggering an alarm at a level of preset threshold, the sensitivity of this detector circuit being adjustable to changes in the magnetic field by means of a control that sets the gain of the second stage of the amplifier and, consequently, the gain of the system loop. 2.detective metal detector applicable to doors and the like, according to the preceding claim, characterized in that the rectified output of the amplifier is observed by a meter that is used to facilitate the threshold adjustment, whose rectified output is also applied to the meter indicating the variations of current on each side of a scale whose center coincides with the resting state of the system, the alarm being triggered when the meter's needle exceeds the limit established by the adjustable detector means. 3.detective metal detector applicable to doors and similar. (Machine-translation by Google Translate, not legally binding)
ES1980253233U 1980-09-18 1980-09-18 METAL DETECTOR DEVICE APPLICABLE TO DOORS AND SIMILARS. Expired ES253233Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES1980253233U ES253233Y (en) 1980-09-18 1980-09-18 METAL DETECTOR DEVICE APPLICABLE TO DOORS AND SIMILARS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES1980253233U ES253233Y (en) 1980-09-18 1980-09-18 METAL DETECTOR DEVICE APPLICABLE TO DOORS AND SIMILARS.

Publications (2)

Publication Number Publication Date
ES253233U true ES253233U (en) 1982-04-16
ES253233Y ES253233Y (en) 1982-11-01

Family

ID=8410880

Family Applications (1)

Application Number Title Priority Date Filing Date
ES1980253233U Expired ES253233Y (en) 1980-09-18 1980-09-18 METAL DETECTOR DEVICE APPLICABLE TO DOORS AND SIMILARS.

Country Status (1)

Country Link
ES (1) ES253233Y (en)

Also Published As

Publication number Publication date
ES253233Y (en) 1982-11-01

Similar Documents

Publication Publication Date Title
ATE16428T1 (en) COIN CHECK.
GB1104832A (en) Discriminating circuits
FR2270733A1 (en) Magnetic field vehicle detector unit - receiver detects changes produced in an emitted magnetic field
ES253233U (en) Metal detector device applicable to doors and similar. (Machine-translation by Google Translate, not legally binding)
EP0277031A3 (en) Volume control circuit for use in portable telephone or the like
DE68908236D1 (en) FREQUENCY-SHARING ANSWER WITH AN AMORPHOUS WIRE FOR USE IN A PRESENCE DETERMINATION SYSTEM.
US3965425A (en) Electromagnetic radiation source locator
JPS56146381A (en) Television voice receiving device
JPS56110063A (en) Measuring device for current position and direction of moving body
SE8102827L (en) DEVICE FOR THE DETECTION OF METAL FORMS
JPS5735426A (en) Noise detecting circuit
JPS5784628A (en) Mobile radio device
JPS57100362A (en) Ultrasonic wave measuring device
JPS5595425A (en) Malfunction preventive unit of television receiver
JPS5937909Y2 (en) Radio warning device
JPS56149129A (en) Radio receiver for vehicle
KR930008544A (en) Automatic adjustment of the clock
ES2042396A2 (en) Device for detecting single polar and/or short circuit defects in medium voltage aerial lines
JPS56137720A (en) Receiving circuit for amplitude-modulated wave
JPS56168451A (en) Receiver of am stereophonic broadcast
JPS5383526A (en) Receiving device for multiple information signal
JPS57136825A (en) Super-regenerative receiving system
JPS5768933A (en) Fm receiver
JPS56158529A (en) Receiver
JPS56168450A (en) Fault detecting system of fm radio receiver