GB672853A - Improved control method and apparatus for mechanical copying machines - Google Patents

Improved control method and apparatus for mechanical copying machines

Info

Publication number
GB672853A
GB672853A GB17401/50A GB1740150A GB672853A GB 672853 A GB672853 A GB 672853A GB 17401/50 A GB17401/50 A GB 17401/50A GB 1740150 A GB1740150 A GB 1740150A GB 672853 A GB672853 A GB 672853A
Authority
GB
United Kingdom
Prior art keywords
photo
cell
pulses
rotating shutter
shutter
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
GB17401/50A
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.)
Linde Air Products Co
Original Assignee
Linde Air Products Co
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 Linde Air Products Co filed Critical Linde Air Products Co
Publication of GB672853A publication Critical patent/GB672853A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
    • B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
    • B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
    • B23Q35/12—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means
    • B23Q35/127—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means using non-mechanical sensing
    • B23Q35/128—Sensing by using optical means

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Shutters For Cameras (AREA)

Abstract

672,853. Photo-electric control of copying- machines. LINDE AIR PRODUCTS CO. July 12, 1950. [Aug. 30, 1949] No. 17401/50. Class 40 (i). [Also in Group XL (b)] The invention relates to the control apparatus of copy-milling machines of Specifications, 561,171, [Group XL], 583,520, wherein a rotating shutter interrupts a beam of light passing by the edge of a template to energize a photo-electric cell, the resulting pulses from the photo-cell being fed through a mechanical or electrical switching mechanism operated in synchronism with the rotating shutter to a driving means controlling the relative movement of the cutting tool and the workpiece in each of the four component directions of a co-ordinate system. The improvement of the invention comprises the addition of an amplifier followed by a generator which translates the variable pulses from the photo-cell into pulses of fixed duration and transmitting these constant duration pulses to the switching arrangement. As shown, Fig. 2, a tracing head comprising a light source 10, a rotating shutter 12 and photo-cell 14, is mounted for horizontal movement relative to a template 16, the output of the cell 14 being fed through an amplifier 28 and constant duration pulse generator 30 to quadrature phase speed amplifiers 18, 20, 22, 24 operating a North-South motor 38 and East-West motor 46, driving the tracing head, the amplifiers 18-24 being switched in synchronism with the rotating shutter 12, so that the position of the photo-electric pulses in the cycle determine the direction of travel of a work piece relative to the cutting head. The shutter 12 may have a simple pin-hole, or a series of pin-holes on varying radii, or an arcuate slot, or an eccentric semi-circular opening.
GB17401/50A 1949-08-30 1950-07-12 Improved control method and apparatus for mechanical copying machines Expired GB672853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US113168A US2521946A (en) 1949-08-30 1949-08-30 Fixed time interval line tracker control

Publications (1)

Publication Number Publication Date
GB672853A true GB672853A (en) 1952-05-28

Family

ID=22347935

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17401/50A Expired GB672853A (en) 1949-08-30 1950-07-12 Improved control method and apparatus for mechanical copying machines

Country Status (2)

Country Link
US (1) US2521946A (en)
GB (1) GB672853A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764039A (en) * 1953-01-29 1956-09-25 Black Leon Paul Automatic control for machines
DE1143911B (en) * 1958-07-16 1963-02-21 Westinghouse Canada Ltd Automatic copier with photoelectric control

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721989A (en) * 1949-11-29 1955-10-25 United Shoe Machinery Corp Recording magnitudes in ratio form
US2622485A (en) * 1950-06-16 1952-12-23 Cincinnati Milling Machine Co Automatic line tracking machine
US2853626A (en) * 1951-09-17 1958-09-23 Kearney & Trecker Corp Automatic copying machine with anticipator control
US3080484A (en) * 1951-12-06 1963-03-05 Hughes Aircraft Co Electrooptical light-detecting apparatus
US2941084A (en) * 1952-01-02 1960-06-14 Fruengel Frank Receiver for light-flash signaling system
US2803995A (en) * 1954-04-07 1957-08-27 American Optical Corp Means and method of testing lenses
US2882476A (en) * 1954-10-20 1959-04-14 Kearney & Trecker Corp Motor control system
US3024699A (en) * 1956-06-15 1962-03-13 Kollsman Instr Corp Light modulation system
US2933668A (en) * 1956-07-14 1960-04-19 Westinghouse Canada Ltd Electric motor control system and curve tracer
NL221903A (en) * 1956-10-26
US3083580A (en) * 1957-03-07 1963-04-02 Selby International Inc Digital controlled machine
US3209220A (en) * 1959-09-24 1965-09-28 Ivan L Joy Pattern control superheterodyne motor control system
NL261389A (en) * 1960-02-19
US3046681A (en) * 1960-05-23 1962-07-31 Honeywell Regulator Co Control apparatus
FR1102497A (en) * 1964-07-16 1955-10-21 Onera (Off Nat Aerospatiale) Track follower device
US3419721A (en) * 1966-10-28 1968-12-31 Air Force Usa Object locating by means of sensing a light spot
US3501644A (en) * 1967-05-31 1970-03-17 American Mach & Foundry Radiation sensitive bowling pin sensor
US3932743A (en) * 1969-10-14 1976-01-13 Sitnichenko Valentin Mikhailov Photo-copying device
US3991789A (en) * 1975-03-31 1976-11-16 Dana Corporation Infinitely adjustable cyclic timing device
GB1536948A (en) * 1976-09-25 1978-12-29 Rolls Royce Means for indicating the profile of a workpiece

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2397933A (en) * 1943-02-19 1946-04-09 Linde Air Prod Co Line tracker control
US2430924A (en) * 1940-09-21 1947-11-18 Linde Air Prod Co Method and means for producing contours in material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764039A (en) * 1953-01-29 1956-09-25 Black Leon Paul Automatic control for machines
DE1143911B (en) * 1958-07-16 1963-02-21 Westinghouse Canada Ltd Automatic copier with photoelectric control

Also Published As

Publication number Publication date
US2521946A (en) 1950-09-12

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