US1610803A

US1610803A - Measuring and geometric instrument

Info

Publication number: US1610803A
Application number: US343A
Authority: US
Inventors: Asa O Mcreynolds
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-01-03
Filing date: 1925-01-03
Publication date: 1926-12-14
Anticipated expiration: 1943-12-14

Description

A. Q. M REYNOLDS MEASURING AND GEOMETRIG INSTRUMENT Dec, 14, 1926. 1,610,803

Filed Jan. 5, 1.925

T/ 2 lill/ll I III I I'll I ll ,1 I l I l i W Patented Dec. 14, 1926.

ASA O. IvICREYNOLDS, OF CLEVELAND, VIRGINIA.

MEASURING AND GEOli/IETRIC INSTRUMENT.

Application filed. January 3, 1925.

The present invention ally to measuring and ments.

The invention aims to provide a structure capable of cutting out hip grooves, bridges, braces, door and window casings and bases, making plumb cuts, measuring pitches and other similar operations. which will be evident to those skilled in the use of similar instruments after a consideration of this detailed disclosure.

A very important object of the invention is to provide an instrument of this nature, which is possessed of an extremely simple and efficient structure, one which is thoroughly reliable in operation, inexpensive to construct, easy to operate, accurate, not liable to readily get out of order, strong, durable, and otherwise well adapted for the 20 purpose for which it is designed.

l Vith the above and numerous other objects in view, as will appear as the description proceeds, the invention resides in certain novel features of construction, and in the combination and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawing: Figure 1 is a plan view of the instrument embodying the features of my invention.

Figure 2 is an edge elevation thereof.

Figures 3 and 4 are transverse sections, taken substantially on the lines 83 and 4- 1 respectively, of Figure 1, and

Figure 5 is a detail plan view, showing one end of the main plate.

Referring to the drawing in detail, it will be seen that 1 designates the supporting frame, which is provided with a relatively long edge 5 and the relatively short edge 6. These edges 5 and 6 are straight edges, and are disposed at right angles to each other. On the straight edge 6 adjacent the ends thereof, there is provided a raised portion 7, having a slot 8 extending therethrough, and an opening 9 extending therethrough at right angles to the slot. The main blade 2 is constructed, at one end, with an elongated notch 10, and on one surface with a longi tudinally extending groove 12, starting at the notch 10, and terminating between the ends of the blades. The slot 8 is continued through the straight edge 6, so as to form a groove, in which one edge of the main blade 2 may rest. When the main blade is rested in the groove or slot 8, the notched or biappertains genergeometric 1nstrulll Serial No. 343.

furcated end 10 thereof is extended through the enlarged portion 7, and a stud 13 is adapted to be extended through the opening 9 and through the notch 10. This stud 13 is provided with the head 14 countersunk into the frame and a threaded reduced shank 15 for a purpose to be hereinafter mentioned. A set screw 16 is threaded throughthe frame 1, to engage the stud 13 and bind with the same to hold it in place. A bolt 17 is extended through the frame, adjacent the juncture of the straight edge 6, with the straight edge 5. and is reduced at one end, the terminal of the reduced end being provided with a hooked extension 18 adapted to be received in the groove 12, and by screwing up on the nut 19 provided on this bolt 17, the blade 2 is held in desired fixed position with relation to the frame 1. This blade 2, of course, is extended rectangularly in relation to the straight edge 5, and so that its edges are disposed, one on each side of, and parallel to the straight edge 6. Suitable indicia is marked on the blade 2, for reduction purposes and need not here be described in detail.

An auxiliary blade 3 has also provided thereon suitable indicia and is fixed to a head 20, having an arcuate portion 21, with degrees marked on its outer edge and corresponding pitch markings from 1 to 24 on its inner edge. These pitch markings indicate bevels, or pitches of roofs, or any degree between 1 to 90. An arm 22 is formed on the frame 1 and is provided with a pair of spaced raised portions 28, between which the arcuate portion 21 is adapted to move when the blade 3 is swung. A hair marker 24; extends over the raised portion 23, for cooperation with the indicia provided on the quadrant so that, for instance, the degree between the two blades may be read by noting the particular marking at which the arcuate portion has stopped. The head 20 is rotatable on the threaded extension 15 of the stud 13 and may be held in different adjusted positions by the nut 25. The free end of the blade 3 is bevelled, as is indicated at 26 in order to obtain small miter cuts afforded by degree angle.

It is thought that the utility and advantages of the instrument will be clearly understood without a very definite outline of the operation of the various parts. I do, however, desire to set forth some of the operation in outline, and it is to be understood that these are merely given by way of we.

ample. In using the device in cutting out hip roofs, that is different bevel cuts of rafters, the blade 3 is set to suit the side out, so that this side out and tri-square cut may be made. The device could then be very quickly changed to a plumb cut. The indicia on the inside of the quadrant corresponds to figures on a framing square, and thus any pitch or degreecen be obtained. In obtaining pitches, blade 2 is placed on the plate level that is the horizontal or base cut of the :rafters, while plate 3 is placed on the rafter. The use of the device for bridges, brace cuts,'and as a common bevelled square. seems to be self evident without any need of: a detailed description.

Inorder that some of the operations of the device may be understood, it is desired to point-out that the blade 2 maybe extended at different distances in relation to the straight edge 5, merely by unloosening the nut 19, on the bolt 17. and sliding the blade Qto the desired position.

It will be apparent from the above detailed description that the device is'capable of easy and ready manipulation to carry out the various operations-described, and others not mentioned, and that the device is possessed of a very simple, yet efficient structure.

It will also be apparent that I have obtained all of the features and advantages enumerated as desirable, in the statement of the inventionand the above description, and thatnumerous changes in the details of construction, in the material, and in the combination and arrangement of parts may be resorted to, Without departing from the spirit or scope of the invention as hereinafter claimed, or sacrificing any of its advantages.

.Having thus described my invention, What I claim as new and desire to secure by Letters Patent is:

A ,measuring instrument of the class described including a frame having a pair of rectangularly disposed straight edges, one of which it; provided with a longitudinally extending groove, a blade having one edge situated to slide in said groove, said blade being provided with a notch at one end and longitudinal channel extending inwardly therefrom, a bolt extended through the frame and provided with a hooked end engaging "the channel so as to hold the blade in the groove, means associated with the bolt for causing it to 'frictionally hold the blade :in different adjusted extended positions in relation to the frame, said frame provided with an opening registering with the notch, a bolt extending through the opening and through the notch, and a blade pivoted 0n the last-mentioned bolt for being dispoied at different angles with relation to the first blade.

In testimony whereofl aflixmy signature.

ASA O. MCREYNOLDS.