US643204A - Carpenter's rule. - Google Patents

Description

No. 643,204. Patented Feb. l3, I900.

J. F. BOSE.

CARPENTERS RULE.

(Application filed May 2, 1899.)

(No Model.)

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I ATES PATENT QFFICE.

JOSEPH F. ROSE, OF TIVERTON, RI-IODE ISLAND.

CARPENTERS RULE.

SPECIFICATION forming part of Letters Patent No. 643,204, dated February 13, 1900. Application filed May 2, 1899. Serial No. 715,285. (No model.)

T0 at whom it may concern.-

Be it known that I, JOSEPH F. ROSE, a citizen of the United States, residing at Tiverton, in the county of Newport and State of Rhode Island, have invented certain new and useful Improvements in Carpenters Rules, of which the following is a full and complete specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to carpenters rules, and has more particular reference to a device of this class whereby accurate lines and curves may be drawn and numerous varied tests and measurements be made.

The invention is fully disclosed in the following specification, of which the accompanying drawings form a part, in which like reference characters denote like parts in the several views, and in which-- Figure 1 is a plan View of a rule constructed according to my invention; Fig. 2, a detail View, partly in section, on the line 2 2 of a portion thereof; and Fig. 3, an edge view of a portion thereof.

Referring more particularly to the drawings, Ct is the body portion of my improved rule, which is of wood, metal, or any suitablyrigid material and provided at one edge with a beveled portion, as at b, and the beveled portion I) is provided with the usual scale, consisting of numbered graduations c.

The upper surface of the rule-body a is provided with a longitudinal groove d, and said rule-body is slotted longitudinally, as at e, from one end and through a predetermined extent thereof. A thin strip f, preferably of metal, (shown sectioned in Fig. 2 and a partial edge View of which is shown in Fig. 3,) is pivoted ecc'entrically in the slotted end of the body a by a pin g, which passes transversely through the said rule-body and is provided at its inner end with a head it, which engages the lower surface of the rule-body, as shown in Fig. 3. The strip f lies normally within the slot e, and thus forms a rule member, which may be swung out of said slot and used as hereinafter described. The pin 9 is provided with a removable button j, suitably connected therewith by means of threads at the end opposite the head h. A catch projects from the inner end of the strip 1 and extends beyond the adjacent end of the rulebody, and by means thereof the said strip f may be readily pivotally manipulated.

Pivotally mounted upon the upper face of the rule-body a by means of the pin g, which passes through an opening in the inner end thereof, is an arm Z, provided with a pointer m, which operates in connection with the scale 0, and the arm Z is provided with an end head n, having a pin-hole 0, through which a pin 19, provided with a finger-piece q, is adapted to pass, and the pointer m projects from the arm Z at such an angle as shall bring the pin-hole o in alinement with the zero scale-mark of the scale a when the said pointer registers therewith.

A slide a" is mounted upon the face of the rule-body and provided with a lug s, which fits the groove d, and with an angular down-- wardly-extending projection 25, provided with a lug it, which fits a longitudinal groove w, formed upon the edge of the rule-body 0pposite the beveled edge Z). A thumb-screw m passes operatively through the slide 0 and engages the rule-body to lock the slide in adj usted position upon the rule-body. The slide 0" is also provided with a pointer 1 which operates in connection with the scale c, and with a collar .2, connected with the angular projection t, and the collarzis provide-d with a thumb-screw 4, by which a pencil 5 may be secured therein. A line passing centrally through the collar 2 and the pointer y will be at right angles with the scale 0.

The operation of my device will be evident from the foregoing description when taken in connection with the accompanying drawings and the following statement thereof.

When it is desired to try the outer-surface square of a block or other body, the arm f is swung into the position shown at 6 in Fig. 1, and the block fits between the rule-body and the arm f. When said arm 1' is in the position shown at 7, one edge thereof springs tangentially from the rounded end portion of the rule-body a, enabling said rule-body and rule member to be readily fitted within a frame, as above set forth, whereas in the position shown at 6 neither edges of the rule member f project tangentially from said-rounded end of the rule-body a, but the inner edge of said rule member and the adjacent edge of said rule-body form a true square, by which the outer-surface square of a block or other body may be tried.

When it is desired to try the inner-surface square of a frame or other construction, the arm f is swung into the position shown at 7 in Fig. 1, and the rule-body at and arm f are inserted within the frame and brought against the sides thereof. The arm f is eccentrically pivoted to the rule-body a, causing it to swing in different positions of arrangement with relation thereto, as shown in dotted lines in Fig. 1. I

When it is desired to describe a circle or arc thereof of a given radius, the pointer m is brought into registration with the zeromark of the scale 0, the button j is screwed down hard, and the pin 19 passed through the hole 0 in the arm Z, and a pencil 5 passed through the collar 2 and secured therein by the screw 4, the slide r being adjusted so that the pointer y will register with the desired scale-graduation c. A true are or circle may then be drawn and of proper radius, the pencil and pin by proportioning of the slide 1 and collar 2 and arm 1 being equidistant from the scale 0.

When it is desired to use the device as a gage, the head h is brought to bear against the edge of the board or other article and the scale 0 is used to mark a point.

Having fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a device of the class described, a rulebody provided with a longitudinal face groove, and a longitudinal edge groove, and with a scale upon the edge portion opposite said edge groove, an arm pivoted to the end of said rule and provided with a pointer adapted to operate in connection with said scale, a hole being formed in the outer end of said arm, and adapted to receive a pin, a slide mounted upon said rule-body and provided with lugs which fit said grooves, and provided with a thumb-screw adapted to operate in connection with said rule-body, and with a pointer adapted to operate in connection with said scale, substantially as shown and described.

' 2. In a device of the class described, a rulebody provided with a scale, a device pivoted to said rule and adapted to operate in connection with said scale, and to form an arcdescribing center, and an adjustable device mounted in connection with said rule-body, and adapted to operate in connection with said scale and to hold a marking device, the relative construction and arrangement of parts being such that an arc may be described by said describing-center, and marking device with a radius accurately proportionable to a measurement laid off upon said scale, substantially as shown and described.

3. The herein-described device, comprising a rule-body, a scale formed upon the surface thereof, devices pivoted to one end of and projecting laterally from the side of said rulebody and adapted to operate in connection with said scale, and to act as a center bearing for describing an arc, and an adjustable device mounted upon the surface of said rulebody and operating in connection with said scale to hold a marking device, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses, this 28th day of April, 1899.

JOSEPH F. ROSE.

WVitnesses:

JAMES A. SLOOUM, A. LINCOLN HAMBLY.

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