US2373641A - Level - Google Patents

Description

April 17, 1945. P. 1.. ACKERSON LEVEL Filed March 6, 1943 2 Sheets-Sheet 1 Percy L Ackerson ir and April 17, 1945. P. L. ACKERSON 2,373,641

LEVEL Filed March 6, 1945 2 Sheets-Sheet Frq? l flckersaw Patented Apr. 17, 1945 UN lTE- D I STATES PATEN OFFICE V 4 I I 2,373,641 I LEVEL Percy L. Ackerson, C'ohasset, Mass. Application March 6,1943, Serial No. 478,288

2 Claims. ('01. 33-214) My invention relates to improvements in levels, such as those used by ship builders, ship fitters, pipe fitters, machinists, and all other trades that build any object of declivity, and the object is to provide a tool so constructed that it may be used for locating unknown points in a strict horizontal or vertical alinement with certain known points.

With this general object in view, the invention resides in certain novel features of construction to be hereinafter fully described and claimed, the descriptive matter being supplemented by the accompanying drawings which constitute a part of the application and in which, the declivity shoe, is attached to a spirit level with a special hinge and a micrometer screw adjustment and lock nut, to be used in the building of ships or boats or any object that is built on declivity.

Figure 1 is a view in side elevation of a level constructed in accordance with the present invention, showing the adjustable base or shoe in lowered position. I

Figure 2 is a side elevational view, showing the base or shoe in closed position.

Figure 3, is a cross sectional view, taken substantially on the line 33 of Figure 1.

Figure 4 is a cross sectional view, taken substantially on the line 4-4 of Figure 1.

Figure 5 is a top plan view of the pivoted end portion of the base. v Figure 6' is a fragmentary view in vertical longitudinal section through the portion of the instrument which includes the adjusting means.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which 'has been illustrated comprises a beam I of suitable material and dimensions. The beam I has mounted therein a plurality of bubble tubes 2. In its lower edge the beam I has formed, in one end portion, a recess 3. A metallic pin 4 traverses the recess 3. -The loweredge of the beam I is further provided with a longitudinal groove 5 which communicates, at one end, with the recess 3.

Mounted beneath the beam I is an adjustable supporting base 6. The base 6 is provided, on one end, with .an integral, upstanding apertured ear I which is journaled on the pin 4 inthe recess 3. The base-6 further includes a longitudinal rib 8 which seats in the groove 5 when said base is in closed position beneath the'beam I.

The beam I has formed in the end portion thereof which is'remote from the recess 3 an opening 9. Below the opening 9, the beam I also has formed therein a slot I0. A vertical bore I I in the lower portion of the beam I communicates with the opening 9, the slot I0 and the groove 5. An opening I2 in the upper portion of the beam I communicates with the opening 9, said opening I2 being vertically aligned with the bore I I.

.A threaded rod I4 is operable in the bore II. The rod I4 is connected, at its lower end, to the base 6 by a pin and slot connection I5. A tubular adjusting nut I6 is threadedly mounted on the rod I 4 in the opening 9. A lock nut I1 is mounted 6, as seen in Figure 1 of the drawings, the nuts 4 I6 and Il are rotated in a direction to feed the rod I4 downwardly thereby swinging said base away from the beam I. When the desired adjustment of the base 6 has been made the lock nut I1 is tightened against either the upper or the lower wall of the slot Ill. The opening I2 accommodates the upper end portion of the rod I4 when the base 6 is in closed position, as shown to advantage in Figure 6 of the drawings.

. This tool is designed so that it can be used as any ordinary level when declivity shoe is back in recess of level. Being made, thus, so any tradesman will not have to have but one level at his work. Figure 1 will show thatif it is turned to opposite side of level that has declivity shoe set, he will be able to use level in ordinary way.

It is believed that the many advantages of a level constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the having a slot therein beneath the opening, a

threaded rod pivotally connected to the free end portion of the base and operable in the opening and slot, a tubular adjusting nut on the base threadedly mounted on said rod and operable in the opening, and a disk-like lock nut threadedly mounted on the rod in theslot and engageable with certain of the walls thereof for securing the base in adjusted position.

2-. A spirit level comprising a beam having a recess in its lower edge in one end portion and further having a longitudinal groove in said lower edge communicating with said recess, a pin traversing the recess, a longitudinal supporting base beneath the beam, said base comprising an elongated flat plate of a width similar to that of the beam and including an upstanding apertured ear on one end journaledon the pin in the recess, said base further including an upstanding central longitudinal rib snugly engageable in the groove, means carried by the other end portion of the beam and including an adjusting screw pivotally and slidably connected to the base for pivotally adjusting the base toward or away from the beam, and bubble tubes mounted on said beam.

PERCY L. ACKERSON.

Images