US2914938A - Apparatus for investigating surface profiles - Google Patents

Apparatus for investigating surface profiles Download PDF

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Publication number
US2914938A
US2914938A US648041A US64804157A US2914938A US 2914938 A US2914938 A US 2914938A US 648041 A US648041 A US 648041A US 64804157 A US64804157 A US 64804157A US 2914938 A US2914938 A US 2914938A
Authority
US
United States
Prior art keywords
carrier
actuator
plane
pilot
tracer
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 - Lifetime
Application number
US648041A
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English (en)
Inventor
Leo H Laakso
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.)
Individual
Original Assignee
Individual
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
Priority to DENDAT1069392D priority Critical patent/DE1069392B/de
Application filed by Individual filed Critical Individual
Priority to US648041A priority patent/US2914938A/en
Priority to GB8515/58A priority patent/GB845795A/en
Priority to FR1193544D priority patent/FR1193544A/fr
Application granted granted Critical
Publication of US2914938A publication Critical patent/US2914938A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/34—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring roughness or irregularity of surfaces
    • G01B7/345—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring roughness or irregularity of surfaces for measuring evenness

Definitions

  • the present invention relates broadly to measuring and recording equipment, and in its specific phases to a profile inspecting device which utilizes the movements of a workengaging tracer to actuate some adequate indicating meansto disclose'inaccuracies in the profile being tested.
  • the present invention relates to an inspecting device and is an improvement on instruments of the general type disclosed in US. Patent No. 2,633,020, issued March 31, 1953, to Ernest J. Abbott.
  • a slide assembly carries the tracer unit and a skid-including assembly, the skid of the latter assembly being cooperable with a pilot plane known as an optical flat.
  • This slide assembly is mounted in guideways on a support, with the skid-including assembly being hingedly mounted on such slide assembly, since it has been found that if inaccuracies originally exist or later develop in these guideways suflicient to cause deviation of said slide assembly from its intended plane of movement, such deviations would result in erroneous tracer movements with consequent false indication of profile inaccuracies, and accordingly hinging the skid-including assembly with its associated parts provided a Way to minimize such inaccuracies.
  • the present invention is aimed at a still different structure to overcome this difiiculty, and came out of a recognition of the problem involved and the need of a more positive and simple solution of same.
  • this invention has been aimed to provide a tracer unit carrier with such tracer unit guided in a fixed path by the pilot plane; to provide an actuator for moving said tracer unit carrier; and to so connect said tracer unit carrier to said actuator that any deviations of said actuator from its intended plane of operation cannot be transmitted to said tracer unit carrier.
  • Another object has been to provide the tracer unit carrier with a plurality of skids (preferably three) contacting with the pilot plane or optical fiat, and so located as to preclude any possible tilting of said carrier with respect to said plane during operation of the device.
  • Yet another object has been to provide the actuator with an opening somewhat loosely receiving the tracer unit carrier toestablish an operative connection between said actuator and carrier for endwise movement of same in unison, and to prevent transmission of any deviations in the actuator "movements-to --thecarrier.
  • Still another object has been to provide spring means acting on the tracer unit carrier and reacting on the actuator for holding the carrier in contact with the pilot plane so as to be movable in a predetermined path controlled by said pilot plane.
  • Yet another object has been to provide a relatively simple and inexpensive construction for facilitating manufacture while permitting profitable production at a reasonable price.
  • Figure 4 is a top view of the tracer unit carrier.
  • a work table 5, Figures 1 and 2 is shown from which a standard 6 rises rigidly.
  • a plate 7 is mounted for vertical sliding adjustment on the standard 6, as indicated by the double-ended arrow 8 of Figure 2.
  • a second plate 9 is mounted on the plate 7 for pivotal adjustment in' conventional manner, as indicated by the double-ended arcuate arrow 10 of Figure 1.
  • the standard 6, plate 7, and plate 9 correspond respectively to the elements 2,
  • the plate 9 is provided with a lateral bracket portion 11, Figures 1 and 2, in which a pilot block 12 is fixedly mounted, and the lower side of this block constitutes a strictly accurate pilot plane 13.
  • the block 12 is commonly known as an optical flat.
  • the pilot block 12 rests on any suitable supporting means 14, which is preferably yieldable, and is held solidly down by adjusting screws 15. These screws 15 are threaded through a plate 16 which overlies the pilot block 12, and said plate 16 is conventionally secured in place such as by screws 17 upon shoulders 18 in the bracket portion 11 of the plate 9 Under the pilot block 12, the bracket portion 11 is formed with guideways 19, and an actuator slide 20 is slidably engaged with said guideways 19 for proceeding and receding movements in a plane substantially parallel with the pilot plane 13. Such movements may be im-' parted to the actuator slide 20 by conventional means.
  • This screw may be driven in any conventional manner, such for instance as is the screw 38 in the above mentioned Patent 2,633,020.
  • the actuator slide 20 is formed with an opening 23 from its upper to its lower side, said opening being prefervided with upwardly presented skids 25 contacting with the pilot plane 13, said skids being so located as to preclude any tilting of the carrier block 24 with respect to said pilot plane 13. Three skids, located as shown or in some equivalent manner, will sufiice for this purpose.
  • Suitable springs 26 are provided to act upwardly on the carrier block 24 and react downwardly 0n the actuator slide 20, thereby holding the skids 25 in firm contact with the pilot plane 13.
  • the springs 26 are shown of the leaf type and are secured to Patented Dec. 1, 1959-;
  • a tracer 29 is carried by the tracer unit carrier block 24 for contact with the workpiece 30 being tested, and said tracer may be mounted in various conventional ways with one being on the outer end of a vertically tiltable beam 31 extending into a tracer unit casing 32, said casing being secured by screws 33 to the lower side of the tracer unit carrier block 24. Tilting of the beam 31 through movement of tracer 29, when moved in contact with the surface of the workpiece is utilized to operate any desired electrical, magnetic, electronic, piezo-electric, or other indicating means, forming no part of the present invention, to indicate inaccuracies in the profile of the workpiece 30 and to record such inaccuracies if desired.
  • a pilot means having a pilot plane mounted in substantially parallel relation with the surface to be tested; a tracer unit carrier on which said tracer unit casing with its tracer is operatively mounted, said carrier of said tracer unit casing being slidably engaged with said pilot plane in a manner to be guided by same and preclude any tilting of said carrier and said tracer unit casing with respect to said pilot plane, an actuator for said carrier, means mounting said actuator for movement in a plane substantially parallel with said pilot plane, and means connecting said actuator and carrier so as to allow limited deviation of said actuator from its intended plane of movement without correspondingly moving.
  • said carrier, said connecting means also including means for holding said carrier in operative contact with said pilot plane.
  • said actuator is formed with an opening loosely receiving said carrier so as to facilitate movement of the latter back and forth through said actuator to establish said operative connection while permitting said carrier to be guided by said pilot plane.
  • pilot plane faces said carrier which, in turn, is disposed adjacent and substantially parallel to said pilot plane, and spring means are provided to hold said carrier in- Opera tive relation with said pilot plane while permitting relative movement of said carrier to said actuator, said spring means acting on said carrier and reacting in opposite direction on said actuator.
  • a support apilot block mounted fixedly on said support and having a lower surface constituting a pilot plane, a carrier block under said pilot block and having a plurality of skids contact-- ing with said pilot plane, said skids being located to-preclude any tilting of said carrier block with respect to said pilot plane, an indicator-actuating tracer carried by said carrier block, an actuator slide under said pilot block and having an opening loosely receiving said carrier block, said support having guideways mounting said actuator slide for movement in a plane substantially parallel with said pilot plane, and spring means acting upwardly on said carrier block and reacting downwardly on said slide, the aforesaid opening allowing deviation of said actuator slide from its intended plane of movement without imparting corresponding deviating. movements to said carrier block.
  • a tracer unit carrier on which said. tracer is operatively mounted, said carrier being: slidably engaged with said pilot plane in a manner to preclude any tilting of said carrier with respect to said pilot plane", an actuator for said carrier, means mounting.
  • said actuator for movement in a plane substantially parallel with said: pilot plane, said actuator and carrier having an opera-' tive connection constructed and arranged to allow limited devation of said actuator from its intended plane of movement without correspondingly moving said car-- rier, and means holding said carrier in operative contact with said pilot plane, said carrier having a plurality of skids contacting with and slidable on said pilot plane and located to preclude said tilting of said carrier.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
US648041A 1957-03-25 1957-03-25 Apparatus for investigating surface profiles Expired - Lifetime US2914938A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DENDAT1069392D DE1069392B (fr) 1957-03-25
US648041A US2914938A (en) 1957-03-25 1957-03-25 Apparatus for investigating surface profiles
GB8515/58A GB845795A (en) 1957-03-25 1958-03-17 Apparatus for investigating surface profiles
FR1193544D FR1193544A (fr) 1957-03-25 1958-03-24 Dispositif pour le contrôle du profil de pièces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US648041A US2914938A (en) 1957-03-25 1957-03-25 Apparatus for investigating surface profiles

Publications (1)

Publication Number Publication Date
US2914938A true US2914938A (en) 1959-12-01

Family

ID=24599183

Family Applications (1)

Application Number Title Priority Date Filing Date
US648041A Expired - Lifetime US2914938A (en) 1957-03-25 1957-03-25 Apparatus for investigating surface profiles

Country Status (4)

Country Link
US (1) US2914938A (fr)
DE (1) DE1069392B (fr)
FR (1) FR1193544A (fr)
GB (1) GB845795A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251135A (en) * 1962-07-09 1966-05-17 Rank Precision Ind Ltd Apparatus for measuring or indicating lack of straightness of a surface
US3329011A (en) * 1964-08-18 1967-07-04 Motorola Inc Surface testing apparatus
US4050294A (en) * 1976-07-06 1977-09-27 The Boeing Company Apparatus and method of measuring surface roughness
US6256897B1 (en) * 1997-04-04 2001-07-10 Toyota Jidosha Kabushiki Kaisha Three dimensional cam, method and apparatus for measuring three dimensional cam profile, and valve drive apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1157877B (de) * 1960-12-14 1963-11-21 Wenczler & Heidenhain Vorrichtung zur Geradfuehrung eines verschiebbaren Organs, z.B. Taster, Schlitten od. dgl. bei Praezisionsmaschinen
DE1265995B (de) * 1964-05-28 1968-04-11 Rank Organisation Ltd Geraet zum Messen oder Anzeigen von Veraenderungen des Durchmessers eines zylindrischen Werkstuecks in dessen Achsrichtung
US4451987A (en) * 1982-06-14 1984-06-05 The Valeron Corporation Touch probe
DE3901352C2 (de) * 1989-01-18 1994-08-18 Siemens Ag Vorrichtung zur Oberflächenmessung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633020A (en) * 1947-11-19 1953-03-31 Marion E Abbott Apparatus for investigating surface profiles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956891C (de) * 1954-01-14 1957-01-24 Johannes Perthen Dr Ing Profilschreiber

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633020A (en) * 1947-11-19 1953-03-31 Marion E Abbott Apparatus for investigating surface profiles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251135A (en) * 1962-07-09 1966-05-17 Rank Precision Ind Ltd Apparatus for measuring or indicating lack of straightness of a surface
US3329011A (en) * 1964-08-18 1967-07-04 Motorola Inc Surface testing apparatus
US4050294A (en) * 1976-07-06 1977-09-27 The Boeing Company Apparatus and method of measuring surface roughness
US6256897B1 (en) * 1997-04-04 2001-07-10 Toyota Jidosha Kabushiki Kaisha Three dimensional cam, method and apparatus for measuring three dimensional cam profile, and valve drive apparatus

Also Published As

Publication number Publication date
DE1069392B (fr) 1959-11-19
FR1193544A (fr) 1959-11-03
GB845795A (en) 1960-08-24

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