US3026031A

US3026031A - Calculator for determining heating and cooling requirements

Info

Publication number: US3026031A
Application number: US768580A
Authority: US
Inventors: Ragon E Jones
Original assignee: Individual
Current assignee: Individual
Priority date: 1958-10-21
Filing date: 1958-10-21
Publication date: 1962-03-20
Anticipated expiration: 1979-03-20

Description

R. E. JONES March 20, 1962 CALCULATOR FOR DETERMINING HEATING AND COOLING REQUIREMENTS Filed Oct. 21. 1958 2 Sheets-Sheet 1 ekwafill.

March 20, 1962 Q l O m N N N vauv ssv'le INVENTOR RAGON JONES Od/ Y M BY y ATTORNEYS States arent l aszaesl Patented Mar. 20, 1962 This invention relates to a calculator for determining the amount of heating and cooling needed for residential housing.

The residential air conditioning industry, which includes heating and cooling, is presently hampered by the costly and time consuming methods used vinkestimating the sizes and capacities of heating and cooling units needed for houses of various sizes and types of 'construction. It is felt that the industry needs some means for accurately and quickly estimating such requirements.

In view of the above, it is a principal object of this inventionto provide a calculator for determining the size of heating and cooling units needed for residential housing of various sizes and diierent types of construction.

It is another object to provide a calculator such as the above which is accurate and `simple to use.

It is yet another object to provide a calculator as char-` acterized by the above objects which is relatively inexpensive and easy to manufacture.

It is a still further object to provide a calculator as in the preceding objects which comprises a pair of cooperating slides carried within an envelope having two window openings for exposing at least portions of the respective slides.

The above and other objects will become more apparent when taken in conjunction with the following detailed description and drawings, showing by way of example a preferred embodiment of this invention, and wherein:

FIG. 1 is a top plan view of the calculator showing the two slides carried within the envelope and the two window openings exposing portions of therespective slides;

FIG. 2 is a plan view of a chart from which a value representing the ratio of glass area to oor area is determined; and

FIG. 3 is a horizontal cross sectional view taken along line 3 3 of FIG. l.

As illustrated in FIGS. l and 3 the calculator 10 cornprises a front sheet 12 and a back sheet 14 held in spaced relation by yend spacers 16,-16 and top spacer 18 shown in dotted lines in FIG. 1. The front and back sheets together with the end and top spacers form an envelope 20 having an open bottom slot indicated by arrow 22.

The front sheet 12 has a pair of

rectangular windows

24 and 26. A scale representing floor area of a house is positioned on the front sheet 12 along the lower horizontal edge of the window 24. A pair of aligned slots 27-27 are formed in front and

back sheets

12 and 14 respectively, adjacent and parallel to the vertical sides of window 24 toy provide a pair of

guideways

23, 28.

A pair of aligned slots 30-30 are cut in the front and

back sheets

12 and 14 parallel to the outward vertical side of the window 26 to form a guideway 32. A slot 34 is cut in the bottom sheet :14 parallel to slots 30-30 to form a guideway 36 which is displaced inwardly of the inward vertical side of window 26.

A slide l40 is slidably carried within the envelope 20. This slide isv retained in sliding alignment by means of

pins

42, 42 carried in the slide and riding in

guideways

28, 28. Slide 40 is generally rectangular in shape and includes a chart 44 adaptedto register with window 24. This chart has plurality sloping lines having values derived yfrom the ratio of glass area to oor area of a given house. These sloping lines intersect the scale on the lower horizontal edge of the window 24. Such intersection is controlled by the sliding back and forth of the slide 40. In

addition one vertical edge portion of the slide 40 extends under window 26. This edge portion has two index lines A and AA therein which represent two basic types of houses, namely, A for one-story and AA for two-story.

A second slide 50 is slidably carried within the envelope 20 in coplanar relation to the slide 40. This slide is retained in alignment by means of

pins

52, 52 in the slide which ride in

guideways

32 and 36. Slide 50` is generally rectangular in shape and contains a plurality of Vertical scales. The tirst vertical scale, which is denoted by letters n the slide 50 has two main Vdivisions of scales one of onestory houses and the other for two-story houses. f Each of these main divisions contains two scales, one for heat- Y ing requirements and one for cooling requirements. The scale for cooling requirements is divided into ve columns, i.e., 10, 15, 18, 20, 25. These values are known as temperature differences and are well known in the art.

The TD (temperature derence) depends on local conditions. Each cooling T D column has a scale representing tons of cooling capacity needed. The same arrangement is used in the heating scale, i.e., ve TD columns namely 55, 65, 75, 85, 95. Under each of these columns is a scale devoted to heat requirements in B.t.u.s.

The lower horizontal edge of the Window 26 is the result line, being so called because it is along this line that the values of the various scales are read to determine heating and cooling requirements in accordance with the setting of

slides

40 and 50.

Referring to FIG. 2, there is shown a chart 60 havingV a plurality of lines sloping upwardly and slightly diverging from left to right. The vertical scale represents glass area of a house, While the horizontal scale represents lloor area of the house. This chart is generally placed on the exposed face of the back sheet 14.

In using this calculator, the square feet of iloor space and glass mustV be determined as well as the characteristics of the house such as, one or two stories, type of construction, i.e. brick, frame, etc., insulation if any, and also TD for heating and cooling in the particular area involved.

The rst step is to refer to chart 60 shown in FIG. 2 and iind the sloping line which intersects the point of intersection yof the glass area and floor area on this chart. For example, assume the line R passes through this point. Further, assume that the house is one-story, the floor area being 2,400 square feet. Slide 40 is next adjusted so that the sloping line R will intersect the 2,400 square feet designation on the scale on the lower horizontal edge of the window 24. Next, the slide 50 is adjusted so that index line A on slide 50 will line up with line A on slide 40. Now reference is made to the result line and to the proper columns to determine heating and cooling requirements. For example, suppose the TD for cooling is 18 and heating is 55, then the requirements would be found at points P and Q respectively.

The advantages of a calculator such as this will be readily apparent to people in the heating and cooling lield. In a matter of minutes an estimate can be made, upon which prices can be approximated. Such a device is considered invaluable to estimators and salesmen in the eld.

Having thus described my invention and the best mode of practicing the same, what I claim as novel and desire to secure by Letters Patent of the United States is:

l. A calculator for determining the heating and cooling requirements for housing of various sizes and construction, said calculator comprising a holder, rst and second slides carried within said holder in coplanar rela- Vtion so that one vertical edge of each slide abuts the other, the first slide having a plurality of sloping lines representing values derived from the ratio of glass to floor; area, a scale on'the holder representing floor area and adapted for alignment with said sloping lines to determine the position of the slide in the holder, said firsty slide having a pair of index lines on its vertical edge contacting the adjacent vertical edge on the second slide, said pair of index lines representing two different types of houses, the second slide having a first vertical scale representing various types of house constructions and positioned adjacent the vertical edge contacting the vertical edge of the iirst slide for alignment with one or the other of said index lines, said second slide also having a plurality of vertical scales representing heating and cooling requirements for either one or two-story houses for various temperature difference design characteristics, and the holder having a result line cooperating Withthe plurality of vertical scales on said second slide whereby when the second slide is positioned with its -tirst vertical scale properly aligned with the index'rnarks on the rst slide the heating and cooling requirements for a specific house construction are read oil? the plurality of vertical scales where they intersect the result line'. a

y2. The calculator as described in claim l wherein the holder comprises front and back sheets held inspaced envelope having an open bottom.

3. The calculator as described in claim 2 wherein the front sheet of the holder has a pair of windows, the first `window having the iloor area scale positioned along its lower edge .for alignment withy the plurality ,of sloping lines on the rst slide, and wherein the index lines on the rst slide are exposed in the second Window, the second slide being so positioned that all ofy the scales thereon Y relation by two end spacers and a top spacer to form an of oor space extending along the lower horizontal edge of the window, a pair of parallel slots in the front and back sheets parallel to the vertical edges of the window, a rectangular slide slidably positioned within the envelope beneath the rectangular window, said slide having a plurality of sloping lines thereon representing the ratio of the glass area of a house to the floor area, and said slide being adapted for sliding so that the scale on the slide may be aligned with the horizontal scale on the lower edge of the rectangular opening, pins on the slide riding in the vertical slots in the front and back sheets tocontrol the sliding movement of the slide, said slide having a pair of spaced index marks on one vertical edge portion desig-l nating different types of houses, the front sheet having a second rectangular window spaced from the irst window, that portion of the irst Slide having the index lines being exposed in the second window adjacent the inward vertical edge thereof, aligned slots in the front and back second slide the second slide having a Yfirst vertical scale 'y adjacentithevertical edge abutting the first slide, said second slide also having a plurality of vertical scales representing heating and cooling requirements for-either one or two-story houses for various temperature diiierence design characteristics, the holder having a result line cooperating with the plurality of vertical scales on saidV second slide whereby when the second slide is positioned with its first vertical scale properly aligned with the index marks on the tirst slide, the heating and cooling requirements for a specific house construction are read othe plurality of vertical scales where they intersect the result line.

References Cited in the ille of this patent UNITED STATES PATENTS 1,555,190 Currin Sept. 29, 19,25 1,957,112 Smith May l, 1934 2,385,452 Lande a Sept. 25, 1945 Brickner Nov. 1,7, 1953