US2486697A - Grade pitch indicator - Google Patents

Grade pitch indicator Download PDF

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Publication number
US2486697A
US2486697A US749580A US74958047A US2486697A US 2486697 A US2486697 A US 2486697A US 749580 A US749580 A US 749580A US 74958047 A US74958047 A US 74958047A US 2486697 A US2486697 A US 2486697A
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Prior art keywords
grade
indicator
pitch indicator
machine
cutting machine
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Expired - Lifetime
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US749580A
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Alfred G White
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/12—Measuring inclination, e.g. by clinometers, by levels by using a single pendulum plumb lines G01C15/10
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S116/00—Signals and indicators
    • Y10S116/13—Inclinometers for earth working devices

Definitions

  • grade pitch indicator which is of simple construction, inexpensive to manufacture, easy to mount on the grade cutting machine and efiicient in operation.
  • Fig. '1 is a rear elevational view of a grade cutting machine in operation and with the grade indicator mounted upon the same to indicate the pitch or the grade being cut by the machine.
  • Fig. 2 is an enlarged front elevational view of the grade pitch indicator.
  • Fig. 3 is a cross-sectional view taken on line 33 of Fig. 2.
  • Fig. 4 is an end elevational view of the support for the Weight indicating element.
  • Fig. 5 is a top plan View of the support.
  • I0 represents a grading machine or tractor having a scraper blade I I attached thereto and a rear wheel support I2.
  • This grade cutting machine as shown in Fig. 1, is operating upon the ground to cut a grade and on the top of the same there is mounted my grade pitch indicator I3 embodying the features of the present invention.
  • This indicator I3 includes a main support or frame I4 adapted to be attached to the top of the grade cutting machine by bolts l5 extending downwardly through feet portions or flanges I 6 on the bottom of the support I4 and into the top of the grade cutting machine.
  • an arcuat shaped portion or web I! having a measuring scale I8 thereon with the zero indication at the center and with negative and positiv indications extending respectively from opposite sides of the zero indication to indicate the angle which the machine is operating and the grade being cut by the scraper blade I I.
  • a hub having an opening I9 through which extends a bolt or pin 2
  • the pointing portion 25 extends over the scale I8 and will indicate the degrees at which the scraper blade is tilted.
  • the shaft 22 has a head portion 26 adapted to retain a spring 21 which reacts upon the upper end of the pendulum 23 to retain the same against axial displacement upon the bolt 2
  • the tension of the spring 27 can be adjusted by turning a wing nut 28.
  • the ball weight 24 will cause the pendulum 23 to swing and to give an indication to the operator of the grade cutting machine, the grade which is being cut. If the operator has departed from the desired grade an adjustment will be made of the scraper blade upon the machine to bring the machine to the proper grade and the pendulum to the proper position so that it indicates the' true grade angl upon the scale I8.
  • a level indicator the combination which comprises a vertically disposed substantially open frame having end posts with outwardly extended foot flanges with bolt holes therein, the upper ends of said posts connected by inwardly and up- Wardly sloping arms carrying a horizontally disposed centrally positioned hub, and the lower ends of said posts connected by an arcuate intermediate web, the upper inner edge of which is on a radius described from the center of the hub of the upwardly sloping arms, said web having a graduated scale thereon, a pin having a head on the forward end and with the opposite end threaded carried by the hub, an arm having a ball Weight on the lower end and provided with a pointer below the weight, pivotally mounted on said pin, a spring between the head of the pin and arm frictionally holding the arm to restrict swinging thereof, and a thumb nut on the opposite end of the pin for adjusting the tension on the spring.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Component Parts Of Construction Machinery (AREA)

Description

NOV. 1 1949. WHITE 2,486,597
GRADE PITCH INDICATOR Filed May 21, 1947 ATTU R N EYS Patented Nov. 1, 1949 UNITED STATES P TENT OFFlCE This invention relates to a grade pitch indicator for grade cutting machines.
It is an object of the present invention to provide a grade pitch indicator which can be placed upon the top of the grade cutting machine where it can be Watched by the operator and to indicate while the machine is in operation the pitch at which th grade is being cut and to indicate to the operator any variance or departure from the grade pitch which is supposed to be maintained by the grade cutting machine.
Other objects of the present invention are to provide a grade pitch indicator which is of simple construction, inexpensive to manufacture, easy to mount on the grade cutting machine and efiicient in operation.
For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Fig. '1 is a rear elevational view of a grade cutting machine in operation and with the grade indicator mounted upon the same to indicate the pitch or the grade being cut by the machine.
Fig. 2 is an enlarged front elevational view of the grade pitch indicator.
1 Claim. (01. 33220) Fig. 3 is a cross-sectional view taken on line 33 of Fig. 2.
Fig. 4 is an end elevational view of the support for the Weight indicating element.
Fig. 5 is a top plan View of the support.
Referring now to the figures, I0 represents a grading machine or tractor having a scraper blade I I attached thereto and a rear wheel support I2. This grade cutting machine, as shown in Fig. 1, is operating upon the ground to cut a grade and on the top of the same there is mounted my grade pitch indicator I3 embodying the features of the present invention. This indicator I3 includes a main support or frame I4 adapted to be attached to the top of the grade cutting machine by bolts l5 extending downwardly through feet portions or flanges I 6 on the bottom of the support I4 and into the top of the grade cutting machine. Along the bottom of the support is an arcuat shaped portion or web I! having a measuring scale I8 thereon with the zero indication at the center and with negative and positiv indications extending respectively from opposite sides of the zero indication to indicate the angle which the machine is operating and the grade being cut by the scraper blade I I.
At the top of the support, there is provided directly above the zero indication a hub having an opening I9 through which extends a bolt or pin 2| on which is pivoted as indicated at 22 a pendulum or arm 23 having a ball Weight 24 and a pointing portion 25. The pointing portion 25 extends over the scale I8 and will indicate the degrees at which the scraper blade is tilted. The shaft 22 has a head portion 26 adapted to retain a spring 21 which reacts upon the upper end of the pendulum 23 to retain the same against axial displacement upon the bolt 2|. The tension of the spring 27 can be adjusted by turning a wing nut 28.
In operation the ball weight 24 will cause the pendulum 23 to swing and to give an indication to the operator of the grade cutting machine, the grade which is being cut. If the operator has departed from the desired grade an adjustment will be made of the scraper blade upon the machine to bring the machine to the proper grade and the pendulum to the proper position so that it indicates the' true grade angl upon the scale I8.
While various changes may be made in the detailed construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claim.
I claim:
In a level indicator, the combination which comprises a vertically disposed substantially open frame having end posts with outwardly extended foot flanges with bolt holes therein, the upper ends of said posts connected by inwardly and up- Wardly sloping arms carrying a horizontally disposed centrally positioned hub, and the lower ends of said posts connected by an arcuate intermediate web, the upper inner edge of which is on a radius described from the center of the hub of the upwardly sloping arms, said web having a graduated scale thereon, a pin having a head on the forward end and with the opposite end threaded carried by the hub, an arm having a ball Weight on the lower end and provided with a pointer below the weight, pivotally mounted on said pin, a spring between the head of the pin and arm frictionally holding the arm to restrict swinging thereof, and a thumb nut on the opposite end of the pin for adjusting the tension on the spring.
ALFRED G. WHITE.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS
US749580A 1947-05-21 1947-05-21 Grade pitch indicator Expired - Lifetime US2486697A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555954A (en) * 1949-05-20 1951-06-05 Ragnar A Brufiat Gravity actuated guide for farm machines
US3295219A (en) * 1964-03-31 1967-01-03 Universal Equipment Co Inc Degree and angle indicator
US3312361A (en) * 1965-05-06 1967-04-04 William E Foster Converter unit
US3846781A (en) * 1973-01-10 1974-11-05 L Smith Slope indicator and roll-over warning indicator for earthmoving equipment
US4484186A (en) * 1981-11-20 1984-11-20 Wood Lawrence R Earthquake indicator
US4798087A (en) * 1986-08-22 1989-01-17 Kabushiki Kaisha Kenwood Inclination detector
US5450909A (en) * 1993-12-13 1995-09-19 Stevenson; Robert Grade determining method and apparatus
US20080052929A1 (en) * 2006-09-01 2008-03-06 Adepco Technologies Corp. Level indicator for snow plow
USD743280S1 (en) 2012-06-06 2015-11-17 John C. Miller Gradient measuring apparatus
US11168717B2 (en) * 2019-12-23 2021-11-09 Caterpillar Paving Products Inc. Actuator calibration based on a fluid level of a fluid tank

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US162641A (en) * 1875-04-27 Improvement in combined levels, plumbs
US836024A (en) * 1906-02-19 1906-11-13 William F Foster Plumb-level.
US1613776A (en) * 1925-07-13 1927-01-11 Victor R Will Gradometer
US1625683A (en) * 1926-10-23 1927-04-19 Rail Joseph Blade-grader level and slope indicator
US2206420A (en) * 1938-08-02 1940-07-02 Monger Clinometer Ltd Level and clinometer
US2438229A (en) * 1948-03-23 Pendulousty operated crank timing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US162641A (en) * 1875-04-27 Improvement in combined levels, plumbs
US2438229A (en) * 1948-03-23 Pendulousty operated crank timing
US836024A (en) * 1906-02-19 1906-11-13 William F Foster Plumb-level.
US1613776A (en) * 1925-07-13 1927-01-11 Victor R Will Gradometer
US1625683A (en) * 1926-10-23 1927-04-19 Rail Joseph Blade-grader level and slope indicator
US2206420A (en) * 1938-08-02 1940-07-02 Monger Clinometer Ltd Level and clinometer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2555954A (en) * 1949-05-20 1951-06-05 Ragnar A Brufiat Gravity actuated guide for farm machines
US3295219A (en) * 1964-03-31 1967-01-03 Universal Equipment Co Inc Degree and angle indicator
US3312361A (en) * 1965-05-06 1967-04-04 William E Foster Converter unit
US3846781A (en) * 1973-01-10 1974-11-05 L Smith Slope indicator and roll-over warning indicator for earthmoving equipment
US4484186A (en) * 1981-11-20 1984-11-20 Wood Lawrence R Earthquake indicator
US4798087A (en) * 1986-08-22 1989-01-17 Kabushiki Kaisha Kenwood Inclination detector
US5450909A (en) * 1993-12-13 1995-09-19 Stevenson; Robert Grade determining method and apparatus
US20080052929A1 (en) * 2006-09-01 2008-03-06 Adepco Technologies Corp. Level indicator for snow plow
USD743280S1 (en) 2012-06-06 2015-11-17 John C. Miller Gradient measuring apparatus
US9188436B2 (en) 2012-06-06 2015-11-17 John C. Miller Gradient measuring apparatus and system
US9222770B1 (en) 2012-06-06 2015-12-29 John C. Miller Gradient measuring apparatus and system
US11168717B2 (en) * 2019-12-23 2021-11-09 Caterpillar Paving Products Inc. Actuator calibration based on a fluid level of a fluid tank

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