公开(公告)号：GB1109456A

公开(公告)日：1968-04-10

申请号：GB3689265

申请日：1965-08-27

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/08

Abstract: 1,109,456. Photo-electric burner control. ELECTRONICS CORPORATION OF AMERICA. Aug. 27, 1965 [Sept. 4, 1964], No. 36892/65. Heading G1A. [Also in Division F4] A burner control system is made to fail safe by periodically chopping the radiation from the flame falling on a detector 20. Thus when a flame is detected relay 24 is repeatedly energized and de-energized; in one state capacitor 44 is charged from a power source 40 and capacitor 46 is discharged through a relay 32, and in the other state capacitor 46 is charged and 44 discharged through the relay. Relay 32 is maintained energized by the repeated discharges to keep contacts 34 closed and the burner fuel valve 16 open. If the flame fails relay 24 remains de-energized and when 44 has discharged relay 32 drops out to close valve 16. If a fault develops whereby a flame signal is generated even when the cell 20 is unilluminated relay 24 remains energized and again valve 16 is closed. In a modification relay 32 is replaced by a double winding relay with the junction between the windings connected to the point 52, Fig. 2 (not shown). This permits the insertion of a resistance to make the discharge time of the capacitors 44 and 46 different. The relay 24 may be replaced by a switching transistor, Fig. 3 (not shown), or alternately illuminated photo-resistors.

公开(公告)号：GB1101630A

公开(公告)日：1968-01-31

申请号：GB3698366

申请日：1966-08-18

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/08

Abstract: 1,101,630. Photo-electric flame sensor. ELECTRONICS CORPORATION OF AMERICA. Aug.18, 1966 [Sept.2, 1965], No. 36983/66. Heading G1A. An avalanche breakdown type of detector sensing ultraviolet radiation from a flame is fed with A. C. via a circuit which is resonant at a frequency substantially greater than the A. C. frequency. When the detector is in its low impedance avalanche breakdown, so that each half cycle current flow through the detector upon avalanche is quenched before the A. C. changes polarity. As shown in Fig. 2 600V. A. C. are fed to a detector 116, comprising tungsten electrodes in a hydrogen atmosphere, through capacitor 112 and inductance 120 which together form the required resonance circuit. The inductance 120, which is an autotransformer, reflects pulses created by each half cycle avalanche via diodes 134, 136 to charge capacitor 150 which slowly discharges into capacitor 164. If pulses arrive at a sufficient rate, the controlled rectifier 160 is made conductive and current flows through relay coil 162. A capacitor may be provided on the primary side of transformer 100 to provide a circuit which is resonant at the A. C. frequency. In another arrangement Fig. 1 (not shown) the detector is in the secondary circuit of an autotransformer whose primary circuit together with a capacitor forms a circuit which is resonant at the A. C. frequency when the detector has not broken down but resonant at a much higher frequency when the detector has broken down. Circuitry for collecting the breakdown pulses is similar to Fig. 2. In a third arrangement Fig. 3 (not shown), the required resonant circuit comprises a capacitor bridging the detector and inductor in series.

公开(公告)号：FR1491692A

公开(公告)日：1967-08-11

申请号：FR74827

申请日：1966-08-31

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/22

公开(公告)号：DE1236088B

公开(公告)日：1967-03-09

申请号：DEE0027230

申请日：1964-06-18

Applicant: ELECTRONICS CORP AMERICA

Inventor： GUIFFRIDA PHILIP ,  PRATT JOHN ,  GRAVES DONALD LEE

IPC: H01J47/08

公开(公告)号：CH425014A

公开(公告)日：1966-11-30

申请号：CH782764

申请日：1964-06-16

Applicant: ELECTRONICS CORP AMERICA

Inventor： PHILIP GIUFFRIDA ,  JOHN PRATT ,  DONALD LEE GRAVES

IPC: H01J47/00 ,  H01J47/02 ,  H01J47/08 ,  H01J39/04

公开(公告)号：CA743227A

公开(公告)日：1966-09-20

申请号：CA743227D

Applicant: ELECTRONICS CORP AMERICA

Inventor： WILLIAMS DAVID B

公开(公告)号：GB1011145A

公开(公告)日：1965-11-24

申请号：GB1383364

申请日：1964-04-03

Applicant: ELECTRONICS CORP AMERICA

IPC: F21V33/00 ,  G01N21/55 ,  G01N21/86 ,  G01S7/481 ,  G01S17/02 ,  H04N1/029

Abstract: 1,011,145. Photo-electric inspection. ELECTRONICS CORPORATION OF AMERICA. April 3, 1964 [April 8, 1963], No. 13833/64. Heading G1A. A reflex scanner in the form of a unitary structure comprises a lamp 10 providing through a lens 12 a cylindrical beam and a sensing unit 74 for receiving light reflected from a target 20, the unit consisting of a lens 24, a pinhole 26 and a photo-cell 30. The target may, for example, be an article on a conveyer line. The lamp 10 is mounted on a plate 34 and may be adjusted upwards or sideways. The back of the casing 31 is hinged at 66. The elements within the unit 74 are supported coaxially by three thin webs such as 88.

公开(公告)号：FR1413496A

公开(公告)日：1965-10-08

申请号：FR993672

申请日：1964-11-03

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/08

公开(公告)号：AT241005B

公开(公告)日：1965-06-25

申请号：AT5562

申请日：1962-01-04

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/22

公开(公告)号：GB993506A

公开(公告)日：1965-05-26

申请号：GB2980963

申请日：1963-07-26

Applicant: ELECTRONICS CORP AMERICA

IPC: F23N5/08 ,  G08B17/12

Abstract: 993, 506. Sensing conditions photo-electrically. ELECTRONICS CORPORATION OF AMERICA. July 26, 1963 [Aug. 10, 1962], No. 29809/63. Heading G1A. Photo-electric condition sensing apparatus comprises a sensor having a pair of spaced electrodes connected to the secondary of a voltage step-up transformer, the primary thereof being connected to A.C. supply means and means responsive to changes in current flow in the primary consequent upon sensing of the condition. The sensor 10 comprises tungsten electrodes in a hydroden atmosphere. Ultra-violet photons falling on either electrode produce photoelectrons which under the influence of a 700 volt alternating field cause an avalanche breakdown. A sudden decrease in impedance is reflected through the transformer 38 to discharge the condenser 44 to produce pulses at every half cycle of the current source 40. These pulses are picked up across resistors 48 and 49 by a circuit including a filter 60, 62, 64 which is insensitive to the low frequency magnetizing current in the primary 42. The pulses are fed via a monostable multivibrator 54 to an integrator circuit 56, the integrated signal operating a relay 58 to indicate the presence of a flame. A plurality of sensors may be coupled with a single current source and signal processing channel, Fig. 4, (not shown).