US1683256A - Carpenter's level - Google Patents

Description

Sept. 4, 1928. 1,683,256

w. L. "MYERS CARPENTER S LEVEL Filed April 22, 1925 Ewe/aim" Milan/r1) L, Nye/J Ma i W 3? Patented Sept. 4, 1928.

Persisterries."

wIL rAM L. MYERS, oF'sT. LOUIS COUNTY. iui'ssoenr.

onnrnnrnns LEVEL.

Application filed April 22, 1925. Serial No. 25,055.

This invention relates to new and useful improvements in carpenters levels and has forits object the provision of a simple-and inexpensive devicewhich can bereadily at tached to and detached from a straight edge bar such as is used by carpenters 1n construction work. 4

Further objects of my invention are to pro-" vide spirit level deviceswhichcan beeasily attached at right angles to each other to the respective walls of a rectangular opening formed in a straight bar of wood which it is intended to use as a straight edge and to provide suitable guide members adapted to be driven in position in said opening in appro priate relations to the respective level devices for receiving the threaded shanks of said de-v vices and provide suitable stationary mounts for receiving the thrusts of the adjusting disks threaded on said shanks.

With these and other objects in view' my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described'and claimed, and illustrated in the accompanying drawings inwhichv v Figure 1 is a fragmental plan view of a straight edge bar with the level devices at tached thereto.

Figure 2 is a horizontal cross section taken through a portion of said bar and showing one, of said level devices attached thereto.

Figure 8 is a cross sectional view taken on line 3-3 of Figure 2.

Figure 4 is an enlarged View taken on line 4.4 of Figure 3.'

Figure 5 is a perspective detail view of one of the guides.

Referring by numerals -to the accompany ing drawings, 10 indicates a bar of wood provided with straight edges 11 and having formed in its body portion a centrally disposed rectangular opening 12 having longitudinally disposed walls 14 and transversely disposed walls 15. A. tube carrier 16 is arranged adjacent to one of the longitudinal walls 14 and is secured thereto by suitable fastoning devices 17 which pass through apertures formed in a flange or lip 18 and are seated in said bar 10. Lip 18 is formed integral with the rear end of tube carrier 16 and the outer face of said lip is offset outwardly with respect to the corresponding face of tube carrier 16 in order to space the latter from the longitudinal wall 14.

Tube carrier 16 is preferably formed U- in opening 12.

shape in cross section as shown in Figure 4 and is pro-vided .with a sight opening 16 through which'is exposed the upperportion of a spirit tube 19 which is'embedded in suit": able material 20, such as plaster paris, which 7 is placed in said tube carrier in plastic form. The lower portion of the tube 19 or that por-Y tion which is embedded i'nthe material20- is provided with'a coatingof reflecting mas terial 21'wl1iclrreflects thelightand assists. in reading the tube. This tube is provided. with suitable marks 22 and the liquid contained in said tube contains an air'bubble which. cooperates with said 'marks'to' indicate the level. The rear end of tube carrierkl6 is crimped or tapered outwardly as indicated at 16 in. orderto provide suitable clearance and permit insertion offastening "devices17 in the apertures of lip 18 andvprovide clear.- ance space so that a suitable tool can be applied to said fastening devices to attach them in position inopcning .12. The opposite or forward end of tube car--. rier 16 has extending therefrom and trans versely. thereof a threaded shank24 which passes through a $101625 formed in agu-ide 26 which is stationarilyattached to the appropriate transversewall 15 and provides a stationary bearing for adjusting disks 27 which i are threaded on shank 24 and bear against the opposite sides of member 26. Guide 26 is provided with legs 26* which slightly diverge outwardly and are adapted to be driven in suitable bores formed in said transverse Wall. The ends of said legsare preferably beveled as indicated at 26 to facilitate the insertion and attachment of said guide 26 inposition A level device 28, similar in construction toy the device just describechis attached to the opposite transverse wall at right angles to the first device and a guide29 isdriven into one of the longitudinal walls of open ing 12 for receiving threaded shank 30 of device 28 and providing bearings for. ad'- justing disks 31 screw-seated on said shank.

To attach the device in position, holes are drilled in the proper walls of opening 12 for the reception of fastening devices 17 and another series of holes is drilled in the respective walls for receiving the legs of guide members 26 and 29.. These guide members are now placed in position and can be forced home by hammering the inner ends of said guides. The legs of these guides are formed divergent outwardly in order to conform to the inclination of the bores drilled for the reception of same since said bores cannot always be formed in parallelism with the'bar due to the restricted size of opening 12.

The silvered or reflecting surface of the spirit tube improves the visibility of the levcling marks and increase the usefulness of the device. By forming the level devices separate from each other they can be secured in position at the most advantageous points and the provision of separate guides provides a readily replaceable stationary means for cooperating with the adjusting disks. WVhen thedevices. are attached in-position, the b'ar is tested and the adjusting disks are regulating to bring the air bubble in proper relacarrier and visible through said sight opening, an attaching lip formed integral with one endof said carrier and disposed longitudinally relative thereto, said lip being offset laterally and outwardly from said tube carrier and secured toone of the walls of said rectangular openings for spacing said carrier throughout itsentire length from said wall,

'. a threaded shank fixed to and extending transversely from the opposite end of said tube carrier, a bifurcated guide for receiving said shank and provided withprongs driven into a wall of "said rectangular opening at right angles tothe first mentioned wall for supporting said guide in alignment with said shank, and disks screw-seated on said shank bearing on the opposite sides of said guide for adjusting said tube carrier angularly with respect to its longitudinal axis I 2. In a device of the class described, the" combination with a straight edgebar provided'with a rectangular opening, of a tube carrier arranged in said opening adjacent to one of the walls thereof, a longitudinally disposed pad formed integral with one. end of said tube carrier and having its attaching face offset outwardly relative to said tube carrier and secured to one of the walls of said rectangular opening, fastening devices engaging said pad for securing said tube carrier to said wall, the respective end of said tube carrier having tapered sides to provide access to said pad, adjusting means attached to the opposite end of saidtube carrier for adjusting the latter angularly relative to its longitudinal axis, and a guide member slotted at one end for receiving and cooperating with said adjusting means and provided with. outwardlydivergent legs driven in a wall of said opening at right angles to the first-mentioned wall for supporting said guide mem her in operative position. i

In testimonywhereof I hereunto afiix my signature this 17th day of April, 1925.

WILLIAM L. MYERS.

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