Patent US3755905A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3755905A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for optical alignment of industrial equipment

Assignee: ConocoPhillips Co
•
Filing: 1969-06-25
•
Granted: 1973-09-04
•
Expires: 1989-06-25
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A method and apparatus for aligning kinematic trains of industrial apparatus by optical metrology, the method including the steps of establishing a reference line of sight adjacent the devices in the kinematic train and extending generally parallel to the train, then obtaining precise measurements to reference points on the several devices by optical measurements. The measurements are made when the apparatus is in a cold, inoperative state. Then, after the apparatus has become heated and is in operation, a reference line of sight is again established adjacent the devices in the kinematic train, and measurements are again made from the line of sight to the same reference points on the devices that were used in obtaining the cold measurements. Comparison of the sets of hot and cold measurements is then made to determine the shift or change in position of the devices relative to each other which has occurred in the course of the operation of the apparatus. In carrying out the described method of the invention, apparatus is utilized which permits very accurate measurements to be taken between the reference line of sight and the reference points on the apparatus in the kinematic train. This apparatus includes an optical scale mounted in a scale holder which securely retains the scale in a measuring position, and which is constructed of materials which are affected to a minimum extent by changes in the thermal environment. The scale holder is constructed to allow maximum flexibility in usage, and so that it may be firmly contacted with tooling balls mounted on the apparatus in the kinematic train and functioning as reference points. The apparatus also includes structure for supporting the scale holder in selected positions for purposes of measuring from the reference points to the reference line of sight. Such scale holder supporting apparatus includes a vertical standard having a clamping device pivotally mounted thereon for clamping the scale holder, and a horizontal stabilizer rod having a clamping device thereon for clamping the scale holder.

Inventors

  • 👤 R Blubaugh
  • 👤 R Ruckle
  • 👤 H Watts

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 13:30
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/26; G01B11/27

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 181 words
Apparatus for measuring distance comprising: a. shaft means having a first and second end, said shaft means consisting of material having a low thermal coefficient of expansion; b. a contactor means mounted in said first end of said shaft means; c. an optical scale; d. scale receiving means attached to the second end of said shaft means in a manner so that axis of the scale receiving means will lie in a plane parallel to the axis of said shaft means, said scale receiving means including a slot means extending longitudinally along a portion of the scale receiving means and having a length equal to or longer than said scale, and slidably and freely receiving said optical scale in said slot means; and e. means for dimentionally positioning said optical scale with said contactor means mounted in the first end of said shaft means whereby expansion of said scale receiving means will not affect the position or cause expansion of said optical scale means in its dimensional relationship to the contactor means mounted in the first end of said shaft means.
Claim 2
Dependent Claim 181 words
Apparatus for measuring distance comprising: a. shaft means having a first and second end, said shaft means consisting of material having a low thermal coefficient of expansion; b. a contactor means mounted in said first end of said shaft means; c. an optical scale; d. scale receiving means attached to the second end of said shaft means in a manner so that axis of the scale receiving means will lie in a plane parallel to the axis of said shaft means, said scale receiving means including a slot means extending longitudinally along a portion of the scale receiving means and having a length equal to or longer than said scale, and slidably and freely receiving said optical scale in said slot means; and e. means for dimentionally positioning said optical scale with said contactor means mounted in the first end of said shaft means whereby expansion of said scale receiving means will not affect the position or cause expansion of said optical scale means in its dimensional relationship to the contactor means mounted in the first end of said shaft means.
Claim 3
Dependent Claim 62 words
Apparatus for measuring as defined in claim 1 wherein said shaft at said first end includes an axial bore, means for mounting said contactor means comprising: a shaft portion extending into the bore in said rod; and a head on the end of said shaft portion outside said bore and having a concave depression therein for mating contact with a tooling ball.
Claim 4
Dependent Claim 33 words
Apparatus for measuring as defined in claim 1 wherein said scale receiving means is further characterized in having a bore in one end thereof for receiving a cylindrical portion of said shaft means.
Claim 5
Dependent Claim 22 words
Apparatus for measuring distance as defined in claim 1 wherein said shaft means is a phenol-formaldehyde resin having asbestos fibers embedded therein.
Claim 6
Dependent Claim 54 words
Apparatus for measuring distance as defined in claim 1 wherein said positioning means comprises a metal stop plate rigidly and permanently secured in said slot at the second end of said shaft means and in alignment with said slot means thereof for abutting one end of said optical scale slidingly inserted in said slot.
Claim 7
Dependent Claim 67 words
Measuring apparatus as defined in claim 1 and further characterized to include: a stabilizer structure connected to said shaft means and comprising: elongated rod means; a stabilizer clamp secured to said rod means intermediate its length, and pivotally connected to said shaft means; and a retaining element secured to one end of said rod means for retaining said stabilizer structure against the side of a physical structure.
Claim 8
Dependent Claim 62 words
Measuring apparatus as defined in claim 6 wherein said stabilizer clamp comprises: an upper block receiving said shaft means therethrough and including a pressure plate engageable with said shaft means; and a lower block pivotally connected to said upper block and receiving said rod means therethrough, said lower block having a pressure plate movably mounted therein and engageable with said rod means.
Claim 9
Dependent Claim 79 words
Measuring apparatus as defined in claim 6 wherein said elongated rod means comprises a plurality of rod sections connected to end-to-end relation and having one of said rod sections connected at one end to said retaining element, said rod sections each having a threaded bore in one end, and a threaded projection at its end opposite the end in which the threaded bore is located, and threadedly engaging the threaded bore in the end of an adjacent rod section.
Claim 10
Dependent Claim 39 words
Apparatus for measuring as defined in claim 1 and further characterized to include: a vertical standard structure; and means connecting said shaft means to said vertical standard structure for pivotation of said shaft means about a substantially vertical axis.
Claim 11
Dependent Claim 78 words
Apparatus for measuring as defined in claim 9 whereiN said vertical standard structure comprises: a base plate; a threaded bolt extending upwardly from said base plate; and a plurality of rod sections connected in end-to-end relation and having one of said rod sections connected at one end to said threaded bolt, said rod sections each having a threaded bore in one end, and a threaded projection at its end opposite the end in which said bore is located.
Claim 12
Dependent Claim 52 words
Apparatus for measuring as defined in claim 9 wherein said connecting means comprises: a supporting clamp secured to said vertical standard structure in a fixed location therealong; and a swivel clamp resting upon said supporting clamp, clamped upon said shaft means and rotatable upon said vertical standard structure about a vertical axis.
Claim 13
Dependent Claim 175 words
Apparatus for measuring as defined in claim 10 wherein said swivel clamp comprises: a central block having a semicylindrical recess in one side thereof and a planar face on the opposite side thereof, said block having a bore extending through the central portion thereof between said one side and said opposite side; a pair of end plates spaced from the opposite sides of said central block which have said planar face and said semicylindrical recess therein; a pair of substantially parallel side plates having said end plates and central block secured therebetween, and having circular apertures therein aligned with the bore through said central block; a first pressure plate positioned between one of said end plates and the recessed side of said central block; a second pressure plate positioned between the other of said end plates and the planar side of said central block; and screw clamps connected to said pressure plates and threadedly extended through said end plates whereby when said screw clamps are rotated, said pressure plates are advanced toward said central block.

References Cited (Backward Citations)

GB1050061A Cited
US1324963A Cited
US1476077A Cited
US1583585A Cited
US2366950A Cited
US2801818A Cited
US2873529A Cited
US2914855A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-09-03 1977-03-05 1977-09-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-09-03 1981-03-05 1981-09-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-09-03 1985-03-05 1985-09-04 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag