GB624543A - Modulation systems - Google Patents

Modulation systems

Info

Publication number
GB624543A
GB624543A GB15375/47A GB1537547A GB624543A GB 624543 A GB624543 A GB 624543A GB 15375/47 A GB15375/47 A GB 15375/47A GB 1537547 A GB1537547 A GB 1537547A GB 624543 A GB624543 A GB 624543A
Authority
GB
United Kingdom
Prior art keywords
pulses
producing
diode
fed
pulse
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.)
Expired
Application number
GB15375/47A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB624543A publication Critical patent/GB624543A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/08—Duration or width modulation ; Duty cycle modulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/001—Air flow directing means positioned on the periphery of the horizontally rotating milling surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/04—Position modulation, i.e. PPM
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00—Pretreatment of solid fuel
    • F23K2201/10—Pulverizing
    • F23K2201/1006—Mills adapted for use with furnaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crushing And Grinding (AREA)
  • Amplitude Modulation (AREA)
  • Pulse Circuits (AREA)

Abstract

624,543. Pulse modulation. STANDARD TELEPHONES & CABLES, Ltd. June 11, 1947, No. 15375. Convention date, May 13, 1946. [Class 40 (v)] In an arrangement for producing pairs of timemodulated pulses a pulse generator 10, Fig. 3, feeds X pulses, Fig. 4, to a delay device 11 producing Y pulses, which are fed to a triangular pulse generator 13, a further delay device 12 producing Z pulses, and an amplitude modulator 14, which is also fed by a signal source 15, so as to produce Ym pulses. The Ym pulses are fed together with X pulses to a device 16 producing amplitude modulated rectangular waves, which are combined with the triangular waves in a device 17 to produce the output shown in Fig. 4G. On differentiating, rectifying and clipping the pulses, pairs of timemodulated pulses, Fig. 4H, are obtained. The device 16 comprises two diodes 19, 20, Ym pulses being supplied in a positive sense to the anode of diode 19, thus charging the condenser ,24, diode 20 being normally cut-off. The diode 20 is unblocked by the following X pulse so as to discharge the condenser 24, thus producing the amplitude modulated rectangular pulses, shown at Fig. 4F.
GB15375/47A 1966-12-28 1947-06-11 Modulation systems Expired GB624543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60541066A 1966-12-28 1966-12-28

Publications (1)

Publication Number Publication Date
GB624543A true GB624543A (en) 1949-06-10

Family

ID=24423550

Family Applications (2)

Application Number Title Priority Date Filing Date
GB15375/47A Expired GB624543A (en) 1966-12-28 1947-06-11 Modulation systems
GB45315/67A Expired GB1189317A (en) 1966-12-28 1967-10-04 Rotary Bowl Mill

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB45315/67A Expired GB1189317A (en) 1966-12-28 1967-10-04 Rotary Bowl Mill

Country Status (7)

Country Link
US (1) US3465971A (en)
BE (2) BE705087A (en)
CH (1) CH484701A (en)
ES (1) ES346000A1 (en)
FR (1) FR929389A (en)
GB (2) GB624543A (en)
NL (2) NL6714390A (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223286A (en) * 1961-08-16 1965-12-14 Gen Turbine Corp Portable sprayer with air operated mixing means
JPS5415348B2 (en) * 1975-01-28 1979-06-14
JPS5813950Y2 (en) * 1979-01-19 1983-03-18 川崎重工業株式会社 Fine grinding device
JPS5814822B2 (en) * 1979-01-19 1983-03-22 川崎重工業株式会社 Stator structure of vortex type pulverizer
US4234132A (en) * 1979-05-21 1980-11-18 Combustion Engineering, Inc. Bowl mill with air deflector means
GB2181971B (en) * 1985-10-29 1988-11-09 Smidth & Co As F L Vertical roller mill
US4754932A (en) * 1987-03-18 1988-07-05 Combustion Engineering, Inc. Coal pulverizer inerting and fire extinguishing system
JPH0757324B2 (en) 1987-03-24 1995-06-21 三菱重工業株式会社 Roller mill with rotary classifier
US4792099A (en) * 1987-04-29 1988-12-20 Combustion Engineering, Inc. Pulverizer auxiliary lubrication system
DE19806895C2 (en) * 1998-02-19 2002-10-24 Pfeiffer Ag Geb Method and device for optimizing the milling bed of roller-type bowl mills
US5875977A (en) 1998-05-13 1999-03-02 Combustion Engineering, Inc. Technique for improving the response time of pulverized coal boilers
US6079648A (en) 1999-03-01 2000-06-27 Combustion Engineering, Inc. Arrangement for securing a vane wheel assembly to a grinding table of a pulverizing bowl mill
US7252253B2 (en) 2003-05-13 2007-08-07 Bharat Heavy Electricals Ltd. Bowl mill for a coal pulverizer with an air mill for primary entry of air
US7267293B2 (en) * 2005-05-13 2007-09-11 Alstom Technology Ltd High efficiency bowl mill
DE102005030145B4 (en) * 2005-06-28 2007-10-04 Loesche Gmbh Safety system for a roller mill
US7448565B2 (en) * 2006-09-01 2008-11-11 Alstom Technology Ltd Low profile primary classifier
US7584917B2 (en) * 2007-03-29 2009-09-08 Alstom Technology Ltd Seal for coiled spring assembly
US7690590B2 (en) * 2008-06-13 2010-04-06 Alstom Technology Ltd Electronically controlled journal loading system
US8087172B2 (en) * 2008-09-26 2012-01-03 Alstom Technology Ltd. Method and apparatus for extended life journal assembly
US8491196B2 (en) * 2008-11-11 2013-07-23 Babcock Power Services, Inc. Bearing upgrade and kit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2206145A (en) * 1938-12-22 1940-07-02 Comb Eng Co Inc Air flow choke for bowl mills
US2431746A (en) * 1944-08-25 1947-12-02 Comb Eng Co Inc Bowl mill with vane means providing uniform velocity upwardly swirling air currents
US2641387A (en) * 1947-02-27 1953-06-09 Simpson Herbert Corp Mixing machine discharge door
US2698142A (en) * 1953-02-03 1954-12-28 Combustion Eng Bowl mill with novel bowl and air flow directing means
US2818219A (en) * 1954-03-24 1957-12-31 Straight Engineering Co Dry pan scraper

Also Published As

Publication number Publication date
BE475118A (en)
FR929389A (en) 1947-12-24
US3465971A (en) 1969-09-09
GB1189317A (en) 1970-04-22
NL132163C (en)
CH484701A (en) 1970-01-31
BE705087A (en) 1968-04-16
ES346000A1 (en) 1969-01-16
NL6714390A (en) 1968-07-01

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