US1032493A

US1032493A - Carpenter's laying-out tool.

Info

Publication number: US1032493A
Application number: US66710911A
Authority: US
Inventors: Gurney Myers
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-12-21
Filing date: 1911-12-21
Publication date: 1912-07-16
Anticipated expiration: 1929-07-16

Description

G. MYERS.

GARPENTERS LAYING-OUT TOOL.

APPLICATION FILED DEU. 21, 1911.

Patented July 16, 1912.

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narran srarns Parana onirica GURNEY MYERS, OF LANSDALE, PENNSYLVANIA.

CARPENTER/S LAYING- OUT TGOL.

To all whom it may concern.'

Be it known that I, GURNEY MYERS, a citizen of the United States, residing at Lansdale, in the count-y of Montgomery and State of Pennsylvania, have invented certain new and useful Improvements in Carpenters Laying-Out Tools, of which the following is a specification.

My invention relates to carpenters laying-out tools, and it has particular relation to a device for use in connection with carpenters squares, and also independently, for laying out the various timbers used in forming buildings and other structures.

The principal object of my invention is to provide a simple and efficient device for laying out structural timbers and for readily ascertaining the lengths thereof by a. graphical method, and which device may be readily and quickly manipulated, having no undue complications, to the end that the same may be particularly useful in practical carpentry, as it may be readily used for its designed purposes by any mechanic of ordi nary attainments.

My device is also useful in laying out stair work or the like and many other uses for the tool will be obvious to the mechanic.

My present invention contemplates more particularly certain improved details of construction as will later appear.

The nature and characteristic features of my present invention will be more readily understood from the following description taken in connection with the accompanying drawings forming part hereof, in which Figure 1 is a plan view of a device embodying the main features of my present invention, the samebeing shown in connection with an ordinary carpenters square; Fig. 2 is a transverse section thereof, enlarged, taken approximately on the line 22 of Fig. 1; Fig. 3 is a similar view taken approximately on the line 3-8 of Fig. 1; 4 is a fragment-ary view of the pivot end of a swinging graduated blade employed in the device; and Fig. 5 is a fragmentary underneath plan view of a portion of a slide head or block forming one of the elements of the device.

Referring to the drawings, in the particular embodiment of my invention therein shown, 6 is a slide head having a straight working edge 7, and an upwardly projecting threaded stud 8, the center of which stud Specification of Letters Patent.

Application filed December 21, 1911.

Vgraduated blade 11, the pivot Patented July 16, 1912. Serial'No. 667,109.

coincides with the 7 of the head 6. The stud 8 is threaded except for a small portion near the base thereof, and is centrally apertured as at 9, which aperture is preferably circular for a port-ion of its depth, and for the remaining por.

edge 7 of the slide head 6 as clearly shown in Figs. 1, 2 and 5 of the drawings.

Mounted on the stud 8 is a swinging end of which is clearly shown in Fig. f1 and which is provided with a circular aperture 12 arranged a short distance from the end thereof. The center of the aperture 12 near the end of the swinging graduated blade 11 lies in the plane of the graduated edge 13 of said blade, and is the theoretical point of commencement of the graduations thereon. For the purpose of clearness the ner graduations as well as the graduation numerals are omitted from the drawings. It will also be 4seen that on one side of the aperture 12 there extends a projecting semi-circular collar 14. As before stated the blade 11.is pivotally mounted on the stud 8, the aperture l2 engaging said stud, and superposed over the blade thus mounted is a washer 15 having inwardly extending projections 16 which engage complemental vertical slots 17 in the stud 8, this arrangement serving to prevent rotation of the washer 15 about the stud 8. Threaded on the stud 8 over the washer 15 is a knurled hand nut 18 which serves to clamp the swinging blade 11 in any desired position. The washer 15 which is locked against rotation as hereinbefore set fort-h, thus serving to prevent the rotary mot-ion of the clamping nut '18 from being communicatedV to the swinging blade 11 when it is desired to clamp the same at a fixed angle. By removing the hand nut 18 and washer 15 the blade 11 may be reversed so that the apparatus may be used on either arm or either face of the carpenters square as occasion may require.

plane of the straight edge.

10 preferablyI s before stated the aperture 12 of the swinging blade 11 is located near the end of said blade, that is to say, there is provided a short extension 19 of the blade 11 which extension is also provided with an aperture 20 having

straight margins

21 and 22 parallel with the working edges of the blade 11. The end margin 23 of the extension 19 is a circular arc dr'awn from the center of the aperture 12. f

Mounted upon the slide head 6 is a plate 24 having a semi-circular cut out portion and grooved as at 25, the end of the extension 19 of the blade 11 being loosely confined in said groove 25 in such manner as to permit free movement of said Ablade on the pivot stud 8. A protractor 26 is also mounted in a recess in the head 6, the protractor 26 and the groove 25 being laid out from the center of t-he stud 8 upon which the blade 11 is mounted, and the arrangement being such that the angles will be indicated on the protractor 26 by the extension 19. There is also provided means for clamping the slide head at xed loca-tions on the blades of the square 29, said means comprising clamping members 27 having hook like ends 28 which engage one of the edges of the blade of the square 29. The clamping members 27 are arranged in

slots

30 and 31 cut in the respective top and bottom faces of the head 6 and extending part way across said faces fro-1n the respect-ive edges of said head as clearly shown in Figs. 1 and 3 Vof the drawings, the slots in the top and bottom communicating with each other through openings 32 through which the clamping members pass. The side walls of the slot 30 in theI top face of the head 6 are grooved as at 33 for guiding the clamping members 27, and the rear ends of said clamping members are provided with thumb screws 34 for effecting the clamping operation.

The operation of the device is as follows z-When it is desired to ascertain the length ofa roof rafter or other similar structural timber, the slide head 6 is brought to a position on the carpenters square so that the index marker 10 will coincide with a graduation on one blade of the carpenters square which corresponds to the scaled horizontal projection of the timber. The knurled nut 18 being slightly loosened so that the blade 11 may be swung about the center, which it will be noted coincides with the intersection of the index marker 10 with the straight Working edge 7 of the head 6; the blade 20 is then swung to a position on the other blade ofthe square corresponding to the scaled dimension of the vertical projection of the timber, and

the proper length of the timber may then be read along the graduated edge 13 of the blade 11. Where the shape of the structure is given in degrees instead of the horizontal and vertical projections, the protractor 26 may be employed, or the same may be used to ascertain the number of degrees of inclination from any given dimensions in the horizontal and vertical projections.

It will also be seen that the-shape or angles of the cuts of the timbers may be initially set on the instrument, and that it may then be used to lay out the work on the timbers. It is in connectionwith this laying out of the cuts on the timbers that the extension 19 of the blade 11 will be found most useful, as it will be apparent that it would not be otherwise possible to draw a line on the timber from the edge thereof on account of the location of the pivot stud 8 and the associated parts. By the use of the extension 19 of the blade 11 however, after the main portion of the desired line is drawn the slide head 6 may be shifted and one of the

margins

21 or 22 of the aperture 20 of the extension 19 may be employed to continue the line to the edge, or in some cases the outer edge of the blade 11 will enable the line to be drawn in its entirety, all of which will be clearly apparent from an inspection of Fig. 1 of the drawings.

A number of varied uses for the apparatus will occur to those skilled in the art, and which it is needles to set forth here in detail.

Having thus described the nature and characteristic features of my invention, what I claim as new and desire to secure by Letters Patent is 1. In a device of the character described, a slide head, a stud carried thereby and a blade pivotally mounted on said stud and adapted to swing about the center thereof, said blade having a portion extending rearwardly beyond said stud and said extension having an aperture provided with margins parallel to the working edges of the blade.

2. In a device of the character described, a slide head, a stud carried thereby, said stud having an aperture extending therethrough, means for visually indicating the center of said stud, and a blade pivotally mounted on said stud and adapted to swing about the center thereof, said blade having a portion extending rearwardly beyond said stud and said extension having an aperture provided with margins parallel to the working edges of the blade. i

3. 1n a device of the character described, a slide head, a stud carried thereby, a blade pivotally mounted on said stud and adapted to swing about the center thereof, and a protractor carried by the slide head, the blade having a portion extending rearwardly beyond the stud over said protractor and said extension having an aperture provided with margins parallel to the working edges of the blade.

4. In a device of the character described, a slide head having a straight working edge, a stud carried thereby, said stud having an aperture extending therethrough, said aperture being circular for a portion of its depth and semi-circular for the remainder of its depth and the flat side of the semi-circular portion being in a plane coincident with the straight working edge of the slide head, and a blade pivotally mounted on said Stud and adapted to swing about the center thereof.

5. In a device of the character described, a slide head having straight working edge, a stud carried thereby, said stud having an aperture extending therethrough, a blade pivotally mounted on said stud and adapted to swing about the center thereof, and means for visually indicating the center of said stud comprising a thin inserted piece of metal of different color from that of the slide head.

6. In a device of the character described, a slide head having straight working edge, a stud carried thereby, said stud having an aperture extending therethrough, a blade pivotally mounted on said stud and adapted to swing about the center thereof and means for visually indicating the center of said stud comprising a thin inserted piece of metal of different color from that of the slide head, said inserted piece of metal eX- tending beyond the straight Working edge of theslide head.

7 In a device of the character described, a slide head, a stud carried thereby, a blade pivotally mounted on said stud and adapted to swing about the center thereof, and clamping members carried by said slide head, each of said clamping members being mounted in slots cut respectively in the top and bottom faces of the slide head and eX- tending part way across said faces from the respective edges of said slide head.

8. In adevice of the character described, a slide head, a stud carried thereby, a blade pivotally mounted on said stud and adapted to swing about the center thereof, and clamping members carried by said slide head, each of said clamping members being mounted in slots cut respectively in the top and bottom faces of the slide head and extending part way across said faces from the respective edges of said slide head, and said clamping members each having a hook at one end and a thumb screw at the other end.

In testimony whereof, I have hereunto signed my name in the presence of two witnesses.

GURNEY MYERS. Witnesses:

A. D. JOHNSON, 7.v H. KooNs.

Copies of this patent may 'be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.