US 2640268 A
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Description (OCR text may contain errors)
June 2, 1953 E. THOMPSON LAYOUT INSTRUMENT Filed Jan. 17, 1952 l2 I4 l5 Il METAL am Fig.2
Ellis Thompson o INVENToR.
9 A. dola...
Patented June 2, 1953 UNITED l STATES PATENT OFFICE LAYOUT INSTRUMENT Ellis Thompson, West Palm Beach, Fla. Application January 17, 1952, serial No. 266,869 3 claims. (o1. ca -ss) This invention relates to new and useful improvements in layout instruments and the primary object of the present invention is to provide a device for measuring roof pitch, elbow mitre, various angles, drill sizes and sheetthicknesses, and which may also be employed for leveling purposes.
Another important object of the present invention is to provide an all-purpose carpenter instrument, whereby the various measurements required in construction work may be readily and quickly determined. Y
A further object of the invention is to provide an instrument of the aforementioned character that is extremely Simple and practical in construction and which includes a base section and a pair of arms pivotally secured to the ends of the base section together with means carried by one of the arms for engaging and locking the arms together and alongside of said base section.
A still further aim of the present invention is to provide `a layout instrument that is simple and practical in construction, strong and reliable in use, efficient and durable in operation, inexpensive to manufacture, and otherwise well adapted for the purposes for which the same is intended.
Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:
Figure l is a side View of the present invention assembled for use;
Figure 2 is a view similar` to Figure l, but showing the arms folded in side -by side relation to each other and the base section;
Figure 3 is a plan view of Figure 2;
Figure 4 is an enlarged detail sectional view taken substantially on the plane of section line 4-4 of Figure l; and,
Figure 5 is a fragmentary perspective view of one end of one of the arms illustrating the clip means forming part thereof.
Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral I0 represents a rigid base section whose ends are Secured to swingable, rigid arms I2 and I4 by pivots I6 and I8. Arms I2 and I4 are so positioned or mounted on their pivots that the same lie in planes spaced parallel to each other to permit swinging movement of the arms to a position Where the same are disposed in side by side relationship with respect t0 each other as well as the base section.
A resilient or flexible U-shaped guide clip 26 is integrally formed with the outer free end of the arm I2. One leg portion 22 of the clip 20 is integrally formed with the arm I2 and is iiush therewith. The other leg portion 24 is formed with a notch 26 So shaped as to provide a pair of aligned index lugs 28. One endv of ya fastener 30 is xed to Ithe leg portion 22 and extends through an aperture 32 in the leg portion 24. A wing nut 34 is threaded on fastener 30 to permit adjustment of the leg portion 24 toward or away from leg portion 22.
The arm I4 is curved and its pivoted end is formed with a notch 36 adapted to receive the fastener 30 when the 4arms are folded in side by side relation, whereupon tightening of the nut 34 will secure the arms I2 and I4 together and alongside of the base section I0.
Base section IU is provided with a series of longitudinally spaced apertures 38 of various sizes of diameter with indicia 40 adjacent each aperture to indicate the diameter of the apertures. These apertures will permit the sizes of drills to be determined. The lower edge of the base section I0 is also formed with a plurality of longitudinally spaced notches 42 of various Widths and indicia 44 on the base section disposed adjacent the notches indicate the width of the notches, whereby the thickness or gauge of sheet material, such as metal, may be readily determined.
Arm I2 supports a level unit 46 at its central portion. The arm I2 is provided with graduations 46, preferably in inches with fractions of the inches distinguished by small perforations 50 that may accommodate a pencil point or scriber.
Arm I4 is provided with longitudinally spaced graduations 52 in degrees with spaced perforations 54 for fractions of degrees that will accommodate a scriber. Additional graduations 56 on the arm I4 are provided for determining roof pitch in conjunction with the arm I2 and base section I0. Fractions of the graduations v56 are designated by perforations 58 in the arm I4.
A highly important feature is accomplished through the provision of indicia and graduations 60 along the convex edge of arm I4, since this set of graduations will permit determination of the mitre line of pipe elbows without complicated mathematical computations. The mitre line on any round elbow from a two-piece elbow to and including a nine-piece elbow may readily be determined in a convenient manner by using the pointer in conjunction with the base section H) and graduations BIJ.
The pitch of a roof may be quickly and readily determined and pattern layouts made by an indication of such roof pitch by the registering of pointer 28 with graduations 58 along the concave edge of arm I4, thereby obvating the necessity of employing triangulation work and for mathematical tables. I
In practical use;l ofethe: present. invention, the: arm l2 beingv slidably connected to` the arm |41; will form a desired angle With the base section which angle will be designated between the lugs: 28. A roof pitch may be determined` on laidout in the same manner.
Many other uses of the deviceare,readily'sugle gested by the structure shownand thuathain.- strument is capable of being used* for various types of carpenter or construction Work.
In view of the foregoing description taken in 20 conjunction. with the accomnanying drawings, itis believed that;.:a,clear,A understanding of. the de:
vice will, be. quite apparent: to` those skilled in thisart. amore, detailed description. is` accord:- ingly; deemed unnecessary.`
hended' by the, spirit' of the. invention.. asherein- 3m described and tliesccpeofthe appended claims.. Havingthus described they invention, what isA claimed as new is:5
2.1 It'. is" to be. und'erst'ocxi;d hovizever,` that; even1 1. A layout instrument comprising a base section, a pair of arms pivotally secured to the ends of said base section, one of said arms having graduations thereon, a slide and index member carried by the other arm and slidably received on the said one arm, and means carried by the slide and index member for lockably engaging the said other arm to lock the arms together, said slide and index member including a substantially u-shapedresilient; clililfv Sadilocking means comprising a fastener joining the limbs of said clip.
2. The combination of claim 1 wherein said onegofsaid arms is provided with a notch adjacent its' pivot receiving the fastener When the arms; are'foldeds one beside the other and alongside of said baselsection.
3; The combination of claim 1 wherein the graduatons on said one of said arms includes a scale for indicating the mitre line of round elbows from a-two piecaelbow toand including; a nine piece elbown ELLIS THOMPSON;
Rjeferims-V cited' in theme of: this patent*- UNI'I'ED STATES PATENTS Number Name Date 329,156 Ford* g ,Oct. 27; 1,885". 479,8,031 Haise A H v Ai1g. 2j,1;892 616,179 Bealer etal i Dec.r20'J 18.98"
2,160,949 Willson K K V May 30,519.39