US1509703A - Carpenter's square - Google Patents

Description

Patented Sept. 23, 1924.

UNl'I'ED STATES JAMEES S. BOURGEOIS, OF ROXBURY, MASSACHUSETTS.

CARPENTER S` SQUARE.

Application filed February 2, 1923.

To all, 'whom t may concern:

Be it known that I, JAMES S. Bonnenois, a citizen of the United States, and a resident of Roxbury, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Carpenters Square, of which the following isl a full, clear, and exact description.

'Ihis invention has relation to tools for mechanics and has particular reference tov` an improvement in carpenters squares.

Primarily the invention contemplates a square, which in addition to performing the functions of an ordinary square facilitates and insures the correct marking of doors windows or other structures for the application of hardware thereto, while at the same time permitting its use in the capacity of a pair of calipers.

As a further object the invention contemplates a square including a plurality of blades relatively adjustable with respect to each other on the stock and capable of independent adjustment to vary the projection of the same from the stock.

As a still further object the invention aims to provide a carpenters` square which is extremely simple in its construction and mode of adjustment, which is inexpensive to manufacture, which is highly efhcient in its use and purpose, and which is capable of folding to occupy a minimum amount of space when not in use.

With the above recited and other objects in view the invention resides in the novel construction set forth in the following specification, particularly pointed out in the appended claims and illustrated in the accompanying drawing, it being understood that the right is reserved to embodiments other than those actually illustrated herein to the full extent indicated by the general meaning of the terms in which the claims are expressed.

In the drawing-- Figure 1 is a side view of a square constructed in accordance with the invention.

Fig. 2 is an edge view thereof.

Fig. 3 is an enlarged detail sectional view taken approximately on the line 3-3 of Fig. 1.

Fig. 4; is a similar view taken approximately on the line il-4; of Fig. 1.

Fig. 5 is a detail view of a modified form of blade.

Referring to the drawing by characters serial Nq. 616,534.

of reference, 10 designates the graduated stock of the square which is provided at one end with angularly disposed extremity 1l having e, Slot @1f-stoere 1,2 to slidably accommodate a graduated blade 13. In order toA providemeans for attaching the blade 13 to the stock,` a shank 14; extends through a bore 15 in the extremity 1l, the said bore intersecting and communicating with the slot 12. Thelshank 14: is provided with a reduced extension 16 having al hooked terminal 1T which engages in a longitudinal groove 18 in the face of the blade 13. The opposite end of the shank is threaded as Vat 19 and protrudes froinwthe bore 15 to receive a thumb nut 2O having a recess 21 on the inner side which con-k fronts the extremity 11. Preferably a coiled expansion spring 22 is interposed be" tween the inner Well of the recess and the extension l1 surrounding the shank lil for the purpose of frictionally impinging the hooked terminal 17 against the wall of the groove 18I whereby the blade 1 3 is forced against the inner wall of the slot 1,2 to positively insure the disposition of the blade 13 at a true right angle with the stock 10. The nut 2Q thus constitutes an adjustable abutment for increasing or decreasing the tension of the spring whereby the outer end of the blade 1 3 may be adjusted relatively to the squaring face 23 of thestock. The stock 10 is longitudinally slotted as at 2Llf, said lslot 24. communicating vwith a longitudinal groove 25 extending throughout the length of the squaring face 23. A second graduated blade 26 is adapted to extend transversely through the slot 2l for longitudinal and transverse sliding movement. A bearing and attaching member 27 for` the blade 26 associated with the vshank through the medium of a bolt 28 which is provided with a head 29 received the groove 25 and with a threaded opposite extremity 30 which extends through a bar 31 in the bearing member 27. The width of the slot 24 is less than the diameter of the threaded extremity 30 and the bolt is provided with flattened opposite faces 32 extending from the head to its juncture with the threaded extremity. A thumb nut 33 is engaged on the threaded extremity for frictionally retaining the member 27 in its longitudinally adjusted position on the stock. In order to provide means to allow for the withdrawal of the enlarged threaded extremity 30 from the stock, the slot 2li communicates with a transverse enlarged opening 34 at one end. At the upper end the member 27 is provided with a transverse slot or groove which is identical in construction with the slot or groove 12 of the e1;- tremity 11 whereby theA blade 26 is longiw tudinally adjustable and slidable therein. The blade 26 is provided with a groove Si corresponding to the groove 18 of the blade 13 and a similar shank, nut and spring cooperate therewith for holding the blade 26 in its longitudinally adjusted positions.

When it is desired to use the square in its ordinary capacity, the blade 26 and blade supporting and bearing member 27 may be readily detached by loosening the thumb nut 33 and withdrawing the belt 28 through the opening 34. l/Vhere it is desired to mark off doors, windows, drawers, or other struetures for the application of hinges, locks, etc., the blade 26 and blade supporting and bearing member 27 are applied as illustrated. This greatly facilitates the marking oif of the doors or other structure. By adjusting the blade 26 toward the blade 13, it will be readily understood that the square may operate in the capacity of a pair of `calipers for the measurement of the diameter of pipes or other round objects. The square will also be useful for the marking off of mortise and tenon joints and thus insures bothaccuracy and speed in attaining the desired end. lVhen not in use, the blades may be readily detached to reduce the space required for its packing in a car" penters kit to an absolute minimum.

As illuustrated in Fig. 5 the second blade 65L which is designed to be employed in lieu of the blade 26 is formed with an eX- tension edge 27a projecting toward the blade 13 whereby the extension edge may be brought into contact with the confronting edge of the blade 13 for close measuring, calipering or marking. As illustrated the blade 26a is provided with a groove Bil to cooperate with the hooked terminal of the retaining element.

I claim:

1. A earpenters square comprising a stock having a transverse groove at one end thereof, a blade mounted in said groove for sliding movement relatively to said stock, said stock having a longitudinal slot in the same plane with the transverse groove, a second blade mounted in said slot for longitudinal adjustments and lateral sliding movements with respect to said stock, and means for maintaining said blades in their relatively adjusted positions.

2. A carpenters square comprising a stock having a transverse groove at one end thereof, a blade mounted in said groove for sliding movement relatively to said stock, said stock having a longitudinal slot in the same plane with the transverse groove, a second blade mounted in said slot for longitudinal adjustments and lateral sliding movements with respect to said stock, meansl for maintaining said blades in their relatively adjusted positions, said means consisting of a longitudinally grooved portion in each blade, a set screw having a hooked terminal engaging with the longitudinal groove, a lateral projection at the end ot' the stock through which one of the set screws extends for cooperation with the first. blade, a bearing element slidably mounted on the stoel: through which the set screw engaging with the second blade extends, and a set screw extending through said bearing element and the slotted portion of the steelt.

3. A carpentes square comprising a stock having an angularly disposed extrem" ity at one end provided with a groove at a right angle to the major length of the stock, a longitudinally adjustable iixed blade in said groove, said stock having a longitu dinal slot formed therein, a supporting and bearing member longitudinally adjustable on the stock, said bearing member having a grooved portion disposed at a right angle to the stock and a longitudinally adjustable blade in the grooved portion of the bearing member, and means on the angularly dis-- posed terminal of the stock and bearingr member respectively for maintaining the blades at a right angle to the stock and parallel to each other, said bearing member adapted upon longitudinal movement to adv vance the movable blade carried thereby to ward or away from the fixed blade.

JAMES S. BOURGEOIS

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