US1325606A

US1325606A - Combined bule and square

Info

Publication number: US1325606A
Authority: US
Publication date: 1919-12-23
Anticipated expiration: 1936-12-23

Description

L. A. BALATTI.

COMBINED RULE AND SQUARE APPLICATION man SEPT. 14. 1918.

4Patented Dec. 23, 1919.

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. L. A. BALA'ITI. COMBINED RULE AND SQUARE. APPucAnoN FILED simu. |918.

Patented Dec. 23,1919.

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m 4m (liter/Mag LOUIS A. BALATTI, GF COTTGNWOD, ARIZONA.

COMBINED RULE AND SQUARE.

Specification of Letters Patent.

atented Dec. 23,1919.

Application filed September 14, 1918. `Serial No. 254,080.

To all whom it may concern:

Be it known that l, Louis A. BAL-irri, aV

citizen of Switzerland, residing at Cottonwood, inthe county of Yarapai and State 'of Arizona, have invented new and useful improvements in Combined Rules and Squares, of which the following is a specicztion.

`This'invention is a combined adjustablel rule Ditch-board and square, adapted for use -for laying out stair work, and alsoV y adapted for use in various o-ther ways an'd oth r purposes as will be obvious to those skilled in the art to which the invention relates.

The object of the invention is to provide an improved tool of this character which is simple in construction, and which can be rea lily arranged in any desired adjusted position,

With the above and other objects in view the invention consists in the construction, combination and arrangen'ient of devices hereinafter described and claimed.

In the accompanying drawings Figure 1 is a plan of my invention improved combined rule and square.

Fig. 2 is a sectional view of the same taken on the plane indicated by the line 2-2 of Fig. 1.

Fig. 3 is a longitudinal sectional view through the cross bar.

F ig. 4 is a sectional view on the line 3 3 of Fig. 1.

Figs. 5, 6, and 7, respectively, are transverse sectional views ofthe cross bar, of the pivotal connection between one of the arms and the cross bar, and of one of the arms.

1n the embodiment of my invention I provide a center guide 1 which is preferably provided at opposite sides with scales 2, 3. The center guide is also provided with a dovetail groove 4 which extends from one end thereof to a point a suitable distance from the opposite end.

A pair of folding rule members 5 is pivotally connected to the last named end of the center guide by means of a thumb screw 6, said members 5 forming a rule joint 7 at their pivoted ends. Each rule member is also preferably provided in opposite sides with scales 8, 9, and each rule member is also provided with a longitudinal dovetail groove 10.

. I also provide a cross bar 11 which is hollow, is open at theends,and is provided i on 'the inner side with longitudinal. slots V12.

The central portion of the cross bar is pivotally connected t-o the center guide by a thumb screw 13 the head 11i ofwhich is dovetailed and lis slidably fitted in 4the dovetail groove 4 of the center guide. Hence the cross bar can be turned to'any desired'angle with respect to the center guide and canalso be adjusted longitudinally of the center lguide. rihe rule members 5 are connected'to the crossbar by pivots l5- and slides 16, the pivots being arranged for movement 1n the slots 12 of the cross bar and the slides being secured to the pivots by spring clips 17 and being provided with Adovetail tongues 16a which operate in dovetail grooves 6 of the rule members 5. A pair of rack bars 19 is arranged in opposite sides of the hollow cross bar for longitudinalmovement therein.

A pinion 20 is also arranged in the hollowV cross bar and between the rack bars and engages the teeth of the rack bars as shown.

The spindle 21 of the pinion has a bearing in the outer side of the hollow cross bar and is provided with a head or button 23 whereby the pinion can be readily turned by the thumb and foreinger to cause the rack bars to adjust vthe rule members 5 to any desired angle with respectV tothe center guide.

The cross bar 11 is graduated at one side of its center in inches and fractions thereof and is graduated at the other side of said center along the same longitudinal edge in centimeters and millimeters, and this'cross bar when removed from the member 1 may be efficiently used simply asa ruler. Each of the hinged members 5 is graduated along one edge in inches and one of them is graduated along the other edge in milli-V ton is then actuated to swing the arms 5 so that their edges will register with the desired ones of the graduatiens on the cross bar 11. The relation between thedistance from the end of the member 1 to the graduated edge of the bar 11 and the distance from thecenter of the bar 11 to the graduations thereon with which the outer edge of either bar 5 registers.

will then enable the user to ascertain or determine the proper angle or pitch and this function iseparticularly useful When the device is used in stair-Work or the like.

lVhile I have herein shown and described a preferred form of my inif'ent-ion I would have it understood that changes may be made in the form, proportion and construction of the several parts Without departing.,r from the spirit of my invention and Within the scope of the appended claims.

Having thus described my invention I claim:--

l. In a. tool of the class described the combination of a center guide, a cross bar slidably and pivotally connected to the center guide` and a pair of rule members piif'otally connected With the centering` Y guide and pivotally and slidably connected to the cross bar, and means to simultaneously adjust the rule members With respect to the center guide and cross bar.

A device of the character described comprising a center guide, a cross member slidably and pivotally connected With said center guide, a pair of bars disposed Within said cross. member and slidable longitudie nally thereof, means for moving said last named bars, and a pair of rule members pivotally connected with said center guide and pivotally connected With said last named bars. v

3. A device of the character described comprising a center guide, a cross member slidably connected therewith, a pinion journaled in said cross member, a pair of rack bars slidable longitudinally of said cross bar and engaging said pinion whereby upon rotation of said pinion said rack bars Will be moYed simultaneously, and a pair of rule members pivotally connected With said rack bars and pivotally connected With one end of the center guide.

' In testimony whereof I aiiix my signature.

LOUIS A. BALATTI.