US2112114A - Roofing calculator - Google Patents

Roofing calculator Download PDF

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Publication number
US2112114A
US2112114A US46191A US4619135A US2112114A US 2112114 A US2112114 A US 2112114A US 46191 A US46191 A US 46191A US 4619135 A US4619135 A US 4619135A US 2112114 A US2112114 A US 2112114A
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Prior art keywords
bars
gauge
calculator
roofing
roof
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Expired - Lifetime
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US46191A
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Katherine D Rainbolt
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Individual
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Individual
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Priority to US46191A priority Critical patent/US2112114A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06GANALOGUE COMPUTERS
    • G06G1/00Hand manipulated computing devices
    • G06G1/14Hand manipulated computing devices in which a straight or curved line has to be drawn from given points on one or more input scales to one or more points on a result scale

Definitions

  • This invention relates to a device designed for use by an operator while standing on the ground, to accurately calculate the amount of material required in covering the roof of a building.
  • An important object of the invention is to provide a calculating gauge including a body portion and plumb line, the body portion having certain indicia cooperating with indicia provided in a book of charts, whereby the square feet of a.
  • roof may be readily determined.
  • Figure l is a diagrammatic view indicating the manner in which the gauge is used.
  • Figure 2 is an elevational view of the gauge in its active or extended position.
  • Figure 3 is a view showing the gauge in a closed position.
  • Figure 4 is a sectional view taken on line 4-4 of Figure 3.
  • Figure 5 is a sectional view taken on line 55 of Figure 3.
  • Figure 6 is a fragmental elevational view of oneof the bars, indicating the pivoted brace bars of the gauge.
  • Figure '7 is a view illustrating one of the charts with which the gauge is used.
  • the gauge embodies a pair of bars 5 and 6 which bars are pivotally connected at "I so that the bars may swing with respect to each other, the free ends thereof being spaced apart an appreciable distance as shown by Figure 2.
  • pivoted brace bars 8 one of the bars having a notch 9 to engage the pin 10 carried by the opposite bar, so that the bars 8 will be held against breaking, in one direction, when the bars 5 and 6 havebeen moved to their extended positions.
  • an elongated plate H Secured to the side face of the bar 6 is an elongated plate H which is formed with suitable graduations dividing the plate I! into spaces. These spaces are formed with letters or indicia corresponding to letters or indicia indicating the charts that cooperate with the gauge in completing a calculation. 7
  • the reference character 12 designates a plumb line which is secured to the bar 5 near the free end thereof, the opposite end of the plumb line 5 carrying the weight I3 so that when the gauge is in use as shown by Figure 1, and the upper edge of the bar 5 is held so that it will aline from the eye of the user, with one of the inclined edges of the roof being measured, the line 12 will be 10 moved to a position where it will fall directly over one of the letters of the elongated plate H.
  • the gauge In the use of the device the gauge is held in a position as shown by Figure 1 of the drawings, and it will be seen that when the gauge is in this position, the line 12 falls over the letter H on the plate I 1. Since the width of the building including the overhang is thirty feet and the length of the building is forty feet, the chart H is considered, and the column of figures indicated by the numeral 30 at its upper end is considered. The numeral in this column 30 opposite to the number 40 in the adjacent column will give the accurate number of square feet in the roof.
  • the weight I3 is connected to the line I2, by the means of the spring l4 so that when the gauge has been moved to its closed position, the weight may be moved under the bracket I5, whereupon the tension of the spring 14 will act to hold the weight in this position.
  • a roof measuring instrument comprising a pair of bars, means for pivotally connecting the bars, said pivot means including a member adapted to normally hold the bars in parallel spaced relation with each other, the inner surface of one of the bars being graduated, a plumb line secured to 1 the inner surface of the opposite bar and adapted to align with graduations on the inner surface of the first mentioned bar according to the angle at which the device is held while using the instrument, and means for holding the bars in their 50 extended positions.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Description

March 22, 1938. D R o 2,112,114
ROOFING CALCULATOR Filed Oct. 22, 1955 2 Sheets-Sheet l fl: B. fiaiizfiali March 22, 1938.
K. D. RAINBOLT ROOFING CALCULATOR Filed 001:1 22, 1935 2 Sheets-Sheet 2 Swarm/Km.
Patented Mar. 22, 1938 UNITED STATES PATET 1 Claim.
This invention relates to a device designed for use by an operator while standing on the ground, to accurately calculate the amount of material required in covering the roof of a building.
An important object of the invention is to provide a calculating gauge including a body portion and plumb line, the body portion having certain indicia cooperating with indicia provided in a book of charts, whereby the square feet of a.
roof may be readily determined.
With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of con' struction and combinations of parts hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.
Referring to the drawings:
Figure l is a diagrammatic view indicating the manner in which the gauge is used.
Figure 2 is an elevational view of the gauge in its active or extended position.
Figure 3 is a view showing the gauge in a closed position.
Figure 4 is a sectional view taken on line 4-4 of Figure 3.
Figure 5 is a sectional view taken on line 55 of Figure 3.
Figure 6 is a fragmental elevational view of oneof the bars, indicating the pivoted brace bars of the gauge; and
Figure '7 is a view illustrating one of the charts with which the gauge is used.
Referring to the drawings in detail, the gauge embodies a pair of bars 5 and 6 which bars are pivotally connected at "I so that the bars may swing with respect to each other, the free ends thereof being spaced apart an appreciable distance as shown by Figure 2. Connected with the bars 5 and 6, are pivoted brace bars 8, one of the bars having a notch 9 to engage the pin 10 carried by the opposite bar, so that the bars 8 will be held against breaking, in one direction, when the bars 5 and 6 havebeen moved to their extended positions.
Secured to the side face of the bar 6 is an elongated plate H which is formed with suitable graduations dividing the plate I! into spaces. These spaces are formed with letters or indicia corresponding to letters or indicia indicating the charts that cooperate with the gauge in completing a calculation. 7
The reference character 12 designates a plumb line which is secured to the bar 5 near the free end thereof, the opposite end of the plumb line 5 carrying the weight I3 so that when the gauge is in use as shown by Figure 1, and the upper edge of the bar 5 is held so that it will aline from the eye of the user, with one of the inclined edges of the roof being measured, the line 12 will be 10 moved to a position where it will fall directly over one of the letters of the elongated plate H.
One of the charts containing indicia corresponding with indicia of the plate H, is shown by Figure '7 of the drawings.
In the use of the device the gauge is held in a position as shown by Figure 1 of the drawings, and it will be seen that when the gauge is in this position, the line 12 falls over the letter H on the plate I 1. Since the width of the building including the overhang is thirty feet and the length of the building is forty feet, the chart H is considered, and the column of figures indicated by the numeral 30 at its upper end is considered. The numeral in this column 30 opposite to the number 40 in the adjacent column will give the accurate number of square feet in the roof.
While this is one example of the use of the calculator it will of course be understood that other calculations wherein a roof having a greater or less pitch than that shown, is to be measured, the calculations are made in a similar manner.
As shown, the weight I3 is connected to the line I2, by the means of the spring l4 so that when the gauge has been moved to its closed position, the weight may be moved under the bracket I5, whereupon the tension of the spring 14 will act to hold the weight in this position.
What is claimed is:
A roof measuring instrument comprising a pair of bars, means for pivotally connecting the bars, said pivot means including a member adapted to normally hold the bars in parallel spaced relation with each other, the inner surface of one of the bars being graduated, a plumb line secured to 1 the inner surface of the opposite bar and adapted to align with graduations on the inner surface of the first mentioned bar according to the angle at which the device is held while using the instrument, and means for holding the bars in their 50 extended positions.
KATHERINE D. RAINBOLT.
US46191A 1935-10-22 1935-10-22 Roofing calculator Expired - Lifetime US2112114A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296728A (en) * 1965-05-17 1967-01-10 United Shoe Machinery Corp Method and apparatus for compensating for a change in dimension of a firing pin
US3574945A (en) * 1969-07-23 1971-04-13 John R Main Measuring instrument

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296728A (en) * 1965-05-17 1967-01-10 United Shoe Machinery Corp Method and apparatus for compensating for a change in dimension of a firing pin
US3574945A (en) * 1969-07-23 1971-04-13 John R Main Measuring instrument

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