GB764486A - - Google Patents

Info

Publication number
GB764486A
GB764486A GB764486DA GB764486A GB 764486 A GB764486 A GB 764486A GB 764486D A GB764486D A GB 764486DA GB 764486 A GB764486 A GB 764486A
Authority
GB
United Kingdom
Prior art keywords
tube
concrete
piston
rod
valve
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.)
Active
Application number
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.)
Publication of GB764486A publication Critical patent/GB764486A/en
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
    • H01L29/70—Bipolar devices
    • H01L29/72—Transistor-type devices, i.e. able to continuously respond to applied control signals
    • H01L29/73—Bipolar junction transistors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G25/00—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement
    • B65G25/04—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having identical forward and return paths of movement, e.g. reciprocating conveyors
    • B65G25/08—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having identical forward and return paths of movement, e.g. reciprocating conveyors having impellers, e.g. pushers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
    • H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
    • H01L21/24—Alloying of impurity materials, e.g. doping materials, electrode materials, with a semiconductor body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
    • H01L29/36—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the concentration or distribution of impurities in the bulk material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
    • H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
    • H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
    • H01L29/861—Diodes
    • H01L29/88—Tunnel-effect diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Reciprocating Pumps (AREA)
  • Thyristors (AREA)
  • Bipolar Transistors (AREA)

Abstract

764,486. Extruding concrete pipes. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Jan. 20, 1955 [Jan. 20, 1954], No. 1762/54. Class 87(2). [Also in Groups X, XXVIII and XXIX] A pump for wet concrete &c. in the plastic state comprises a tube 11 having an inlet 14 at one end and the other end open to serve as an outlet to a receiver such as a hose 20, means such as a double acting ram 25 to reciprocate the tube 11 slowly on the working stroke by hydraulic fluid from a reservoir 32 kept under pressure by a pump 33 and rapidly on the return stroke by compressed air from a cylinder 37 when a poppet valve 36 on the liquid side of the ram piston 27 has been opened. Concrete mix is stored in a hopper 13 open at its lower part to the tube 11 and provided with a torque 21 fitting the tube and preventing reverse movement of the concrete. As the piston 27 moves the tube 11 forwards an arm 55 on its piston rod 28 moves a connecting rod 43 forwards so that an arm 50 thereon compresses a spring 51 surrounding a rod 44 until the spring is sufficiently compressed to free the rod from a detent 45 and move it to a second detent position 46 whereupon it strikes the stem 41 of the valve 36 opening the valve and permitting the compressed air to return the piston and tube so rapidly that the tube is jerked away from its concrete content leaving it behind. The effect may be accentuated by widening the bore of the tube 11 at its outer end. Flow of the concrete may be facilitated by introducing water through a pipe 61 ahead of the tube 11 and withdrawing it further along as the mass passes through a perforated portion of the hose 20 surrounded by a vacuum chamber 64. To adapt the device for an extrusion operation, a central core may be introduced into the tube 11 and may be reciprocated therewith.
GB764486D 1953-03-25 Active GB764486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES46787A DE1042129B (en) 1953-03-25 1953-03-25 Semiconductor arrangement with two zones of the same conductivity type, a middle zone of opposite conductivity type and very small thickness as well as a potential wall which is thermally overcome

Publications (1)

Publication Number Publication Date
GB764486A true GB764486A (en)

Family

ID=7486135

Family Applications (2)

Application Number Title Priority Date Filing Date
GB764486D Active GB764486A (en) 1953-03-25
GB864554A Expired GB764489A (en) 1953-03-25 1954-03-24 An improved semi-conductor arrangement comprising a cathode, an anode and a control electrode

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB864554A Expired GB764489A (en) 1953-03-25 1954-03-24 An improved semi-conductor arrangement comprising a cathode, an anode and a control electrode

Country Status (4)

Country Link
DE (1) DE1042129B (en)
FR (1) FR1097381A (en)
GB (2) GB764489A (en)
NL (1) NL186225C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1209312A (en) * 1958-12-17 1960-03-01 Hughes Aircraft Co Improvements to Junction Type Semiconductor Devices

Also Published As

Publication number Publication date
FR1097381A (en) 1955-07-05
DE1042129B (en) 1958-10-30
GB764489A (en) 1956-12-28
NL186225C (en)

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