US1809775A - Combination instrument - Google Patents

Description

Jun 9, 1931. DAEHLIN 1,809,?75

COMBINATION INSTRUMENT Filed Jan. 2, 1929 I Dale) Z Patented June 9, 1931 UNITED: STATES PATENT OFFICE ISAAC DAEHLIN, or rnnnroitir; ILnINoIs COMBINATION INSTRUMENT Application filed. January 2, 1929. Serial No. 329,834.

termined.

Another object of the invention is to provide an instrument of this nature constructed in such manner that it can be used as a pencil compass.

Another object of the invention is to provide a device of this kind which is simple in construction, eificient in operation, durable, and one which can be manufactured at a small cost.

Another object of the invention is to provide a device of this character which is easily and-quickly adjustable for performing various functions, the construction being such that it can be conveniently folded when 25 not in use.

With these and other objects in view, this invention resides in the novel features of construction, formation, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the device. 7

Figure 2 is an edge view.

Figure 3 is a reverse side View showing the legs in position for attachment of a pencil.

Figure 4 is a sectional view on line 14 of Figure 1. r Figure 5 is a sectional view on line 5-5 of Figure 3.

Referring to the drawings, 1- designates a bar having a longitudinal slot 2 formed there in, said bar having its lower end terminating in a centering point 3, the upper end of said bar having a horizontally 'disposed flange 4 carried thereby in which is formed a gauge opening 5. The bar is provided with a plurality of gauge openings 6, varying in size in order that the size of rivets or bolts can be quickly and accurately determined.

Engaged on the bar 1 isa U-shaped slide 7,

the spaced plates 8 of which engage opposite sides of the bar, said slide being retained upon the bar by a bolt 9 whichhas its fiat portion 10 slidable in the. slot 2, said bolt passing throughthe side plates 8. A winged nut 11 is engaged upon the bolt in order that the slide can be held in adjusted position upon the bar '1, when the occasion requires, it being obvious that when the nut is released the slide can move freely.

Having their upper ends pivotally connected to the tons are legs 12, said legs being arranged upon opposite sides ofthe slide 1 in order that they can freely pass each other when swung in reverse directions.

'A pairoflinks 13 are provided and have their lower ends pivotally secured to the 0pposite sides ofthe lower end of the bar 1 by a r the single pin as an axis, the upper ends of said links being pivotally connected intermediatethe ends of the legs 12, as at 15.

One of the legs12 is graduated, as at 16, so that the same can be used as a rule, it being of course understood that the other leg is likewise graduated.

The bar 1 is-inarkedwith suitable graduations 17 and 17 which cooperate, respectively, with the slide inorderithat the outside and inside diameters of an object can be quickly observedwhen the lowerends of the legs are, properly set with respect to the object being gauged. Any well known system of graduation may be used for this purpose.

The lowerends of the legs 12 are curved slightly, and terminate in points 18, and 0wing to this curvature the points will at all times be in positionpior accurate disposition upon the article gauged. v 1 a I As shown in full li' es in Figure 1, the legs 12'are in position to permit the instrument pin 14 whereby the links' may be pivoted on to be used as an outside caliper, and to also the position, as shown in. dottedlines in Fig urell, and at which time the-instrument may beused as an insidec'alipe'r.

Obviously when the legs are swung for use the slide will move upon the bar, and a reading can be made of the graduations to denote the diameter of the object, the upper edge of said slide serving as an indicator.

As shown in Figure 3 both legs 12 have been swung into parallel relationship upon one side of the bar 1, and when in this position the instrument can be effectively used as a compass. Vhen this is desired a resilient clamp 19 is engaged upon either of the legs 12 and held clamped thereon by the bolt 20, the point 3 obviously serving as a pivotal point for the instrument. The arms of the clamp are provided with aws 21 for clamping a pencil 22, the point of which being arranged adjacent the point 18 of the leg. If desired each leg may be supplied with a pencil holding clamp, said clamps being necessarily secured to the leg at dillerent elevations in order that a double line can be drawn.

It is thought that the operation and advan tages of the herein described invention will be apparent to those skilled in the art without further description.

The bar 1 is also provided with graduations 23 upon its reverse side, in order that when the instrument is laid on the paper and the slide 7 is clamped or set opposite a selected graduation lines can then be drawn along the outer edgesv of the legs 12. The instrument is then removed and the disconnected ends of the lines, due to presence of the slide 7, can be completed. In this manner angles can be drawn for'10 to 165.

Vhat is claimed is 1. An instrument of the class described comprising a bar, a slide movable longitudinally of the bar, legs having their upper ends pivotally connected with the slide and arranged upon opposite sides of the bar, and links pivotally connecting the bar and legs, said links being pivoted to the bar on opposite sides and about a single axis, said legs and links being adapted to move past each other to opposite sides of the bar to adjust the legs to measure inside or outside dimensions.

2. An instrument of the class described comprising a bar having a longitudinal slot therein, a slide, a bolt engaged with the slide and movable in the slot, legs disposed on opposite sides of the bar and having one of their ends pivotally connected to the bolt, and links I pivoted to the bar on opposite sides and about a single axis and pivotally connecting the bar and legs for moving the legs simultaneously during movement of the slide, said legs being swingable on said pivot bolt to pass each other and reverse their positions on opposite sides of the bar for measuring inside or outside dimensions. V

3. An instrument of the class described comprising a bar having a longitudinal slot formed therein, a U-shaped slide including side plates for engaging the opposite sides of the bar, a bolt engaged in the plates and movable in the slot, a pair of legs arranged upon opposite sides of the bar and having their upper ends pivotally connected with the bolt, said legs being curved outwardly at the free ends, and links pivotally connecting the bar and legs, said links being pivoted to the bar on opposite sides and about a single axis, said legs being adapted to be swung past each other to reversed positions on opposite sides of said bar to measure inside or outside dimensions.

In testimony whereof I afiix my signature.

ISAAC DAEHLIN.

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