US600758A

US600758A - Parallel-ruler

Info

Publication number: US600758A
Authority: US
Publication date: 1898-03-15
Anticipated expiration: 1915-03-15

Description

(No Model.)

. I 2 She'ets-Sheet -1. G. L. WARREN 85.13. J'. TIESING. PARALLEL RULE-R.

No. 600,758. Patented Mar. 15,1898.

WW i w M m Attorneys.-

(No Model.) 2 ShetsSheet 2'.

G. L. WARREN & E. J; TIESING.

PARALLEL RULER.

No. 600,758. Patented Mar. 15,1898.

Nl'lED STATES GEORGE L. WVARREN AND EDWARD J. TIESING, OF NEW HAVEN, CONNECTICUT.

PARALLEL-RULER.

SJPEQIFICATION forming part of Letters Patent No. 600,758, dated March 1 5, 1898. Application filed June 23, 1897. Serial No. 641,941. (No model.)

To all whom it may concern: Be it known that we, GEORGE L. WARRE and EDWARD J. TIESING, citizens of the United States, and residents of New Haven, county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Parallel-Rulers, of which the following is a full, clear, and exact specification.

Our invention relates to draftsmens utensils, more particularly to rulers, adapted also for other purposes; and it consists of the herein-described device for setting a movable ruler-blade at any desired angle to another stationary, provided with means for affixing the same upon the surface to be ruled, and for shifting the movable blade at adjustable equidistant steps, while at the same time its angular position in relation to the stationary blade is maintained unchanged.

Our invention is illustrated in the accompanying drawings, wherein Figure 1 is a rear elevation of our parallel- 'ruling device; Fig. 2, a top view, and Fig. 3 Fig. 4 is a sectional an end view, thereof. view on line 4 4, indicated in Fig. 2. Figs. 5 and 6 are similar sectional views showing the relative positions of the several parts at different stages of the operations. Fig. 7 is an elevation of a clamping-plate.

Our parallel-ruler consists of the stationary blade A, rod B, rigidly secured thereto in brackets a, support C, provided with a bifurcated protractor-head C, a movable blade E, with pointer e pivoted thereto, the clamping and shifting devices 0 and p, and gage D.

Blade A is provided with prongs j, fixing it in position. Brackets a are secured to the stationary blade A by screws b in such position as to hold the rod B exactly parallel to the edges d and d. On this rod B slides support C, having an outward-projecting circular head C, provided on its edge with graduations indicating angles from Zero to one hundred and eighty degrees. Head C is bifurcated, and strip 7% inserted in the slot is pivoted to it by screw 70. Pointer e is rigidly secured to the strip h, its apex being in close proximity to the graduated edge of the head C.

. vertical position.

Blade E is secured to strip h by screws h in such position that the pointer e will always indicate its angular deflection from the edges d and d of the stationary blade A. Thus by using pointer e in connection with the graduations of the head C the oscillating ruler E can be set at any desired angle to the stationary blade.

Support C consists of a base-plate f and standards Z, made integral therewith and provided with corresponding bores fitted closely upon the rod B. Between the standards Z and exactly in their axial line is provided slot m, extending over the whole space between the standards Z. Recesses it, one on each end of the base-plate outside of these standards Z, are in the same line. Clampingplates 0 are slid on rod B between the standards Z, and spring .9 presses them apart against the standards Z, holding them normally in Their lower ends are set in the slot m and slide therein. Rod B passes through apertures 0 of these clamping-plates, which are slightly larger than its sectional area to permit setting of these plates in position as shown in Fig. 5. The edges of these apertures 0 clamp tightly the rod when plates 0 are held in such inclined position. 19 are similar in shape and construction to the clamp-plates 0. I They are slid on the rod and their ends are set in recesses 72 on the endsof the base-plate f. These clamping plates are, however, normally held in inclined position in relation to the rod B by the springs q, slid on the rod between the plates and the standards Z. They are inclined oppositely to each other andthereby lock support C upon rod B, preventing its motion in either direction. Blade E, pivoted to the head of support C, is thus held securely against longitudinal displacement in relation to the stationary blade A, though the clamping of the support C does not prevent the swinging of blade E around the rod B. Support C may be freely moved on rod B when the clamping-plates p are pressed toward the standards Z in the manner indicated in Fig. 6. Rulerblade E may be fixed in i any position to the Plates support 0 by screw 70, and thus by shifting the support parallel lines may be drawn any distance apart, this distance being only limited by the length of the rod B.

More often it is required to draw parallel lines (such as in shading of surfaces in drawings) equidistantly from each other. This is accomplished by the cooperation of brakeplates 0 and gage D in the following manner:

We have already explained that when the clamping-plates p are pressed toward each other, as indicated in Fig. 6, the support C may be moved along the rod B at will and that plates 0 clamp rod B when they are set against it in an inclined position. GageD is set between the plates 0 and is provided with a downward-proj ectin g guide '1', fitted into the slot 772, and with upward-bent flanges a) on both sides. When either of these flanges abuts against one of the plates 0, it will press the edge of its aperture against the rod B and thereby arrest the motion of the support 0. If the one of the plates 0 standing'in the direction of the contemplated motion of the support 0 is held to the rod B while the support 0 is moved forward, the motion of the support will be arrested when the flange o of the'gage reaches it. Thus the length of the motion of the support 0 upon the rod B may be varied by increasing or diminishing the distance between the flange of the gage and the corresponding plate 0. GageD is pointed and there is a scale a engraved upon the baseplate of the support 0 in such position that the point t of the gage D will indicate this distance upon the scale. Gage D is provided with a slotted arm y and is secured in position by screw w, passing through the slot 00 into the standard Z. Gage D may thus be adjusted in any position between the plates 0. Scale 10 may be divided into fractions of inches or of any other unit of measures.

When it is required to draw parallel lines equidistantly from each other, the gage D is set to indicate on the scale a the distance at which said parallel lines are to be drawn, and then the support 0 is moved by applying the index or middle finger of one hand to one plate 0, (according to the direction the support is to be moved,) and then with the thumb of the same hand appliedto the opposite plate 19 the support is moved until the flange '0 of the gage abuts against the plate 0. This stops the motion of the support 0 on rod B and when the hand is removed from the plates 0 and p or the pressure released springs s and q return them to their normal position. The ruler E will then be advanced exactly the required distance, as indicated on the scale u, and held there by the clamping action of plates 19, as explained above. When the line is drawn, a similar operation will move the blade E an equal distance farther. When the support reaches the other end of the rod B, it may be returned without stopping to its starting-point in the manner described, or the gage D may be reset and the parallel-ruli'n g proceeded with in reversed direction, the support 0 being shifted in the same manner.

Screws 7t and w, fixing the ruler-blade E and the gage D in adjusted positions, are operated by pins 7c and w, respectively. They may, however, equally well be made with square or polygonal heads and operated by av key or otherwise.

WVe claim as our invention and desire to secure by Letters Patent- 1. A parallel-ruler comprising a stationary blade, a rod fixed in standards, secured to the stationary blade; a support, sliding on the rod, and a circular head integral with the support; a movable blade, pivoted to the head; fixed clamping-plates, slid on the rod and having their ends engaged in recesses, provided in the base-plate of the support; springs, set on the rod between the standards of the support and the fixed clamping-plates and holding them in their normal, clamping positions, locking the support to the rod.

2. A parallel-ruler comprising a stationary blade, a rod fixed in standards, secured to the stationary blade; a support, sliding on the rod, a slot provided in the base of the support, parallel to the fixed rod, a head integral with the support, and projecting beyond the edge of the stationary blade, and a movable blade pivoted to the head; fixed clamping-plates, slid on the rod and having their ends engaged in recesses provided in the base-plate of the support; springs, set on the rod between the standards of the support and the fixed clamping-plates, and holding them in their normal clamping positions, locking the support to the rod; movable clampingplates, slid on the rod between the standards of the support and having their ends guided in the slot, a spiral spring, slid on the rod between the movable clamping-plates and holdin g them normally at a right angle to the fixed rod, and an adjustable stopping device secured to the support between the movable clamping-plates.

3. The combination of a fixed rod, a support, suspended on the rod, spring-actuated clamping-plates, fixed in the support; movable clamping-plates, slid on the rod between the standards of the support, and having their ends engaged in a slot, provided in the base of the support, a spiral spring, slid on the rod between the movable clamping-plates and holding them normally at a right angle to the rod, and of a stopping device, secured to the support between the movable clampingplates.

4. The combination of a fixed rod, a support, suspended on the rod, spring-actuated clamping-plates, fixed in the support, movable clamping-plates slid on the rod between the standards of the support and having their ends engaged in a slot provided in the base IIO of the support, and parallel to the axis of the have signed our names in the presence of two fixed rod; a spiral spring, slid on the rod besubscribing Witnesses.

tween the movable clamping-plates and holding them normally at a right angle to the rod, 5 and of a gage adjustably secured to the support between the movable clamping-plates. Witnesses:

In Witness that We claim the improvements CHARLES H. OLDERSHAW,

described in the foregoing specification we SIEGWAR'I SPIER.