US 1359474 A
Description (OCR text may contain errors)
LEVEL. APPLICATION FILED JUNE 23' 1919.
Patented Nov. 16, 1920.
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e/iii UNITED STATES PATENT OFFICE. PHTLIP WiER/N'ICK, OF TORONTO, ONTARIO, CANADA. LEVEL.
7 Specification of Letters Patent. Patented Nov. 16, 1920, Application filed June 23, 1919. Serial No. 306.121.
Tdallwhom it may concern: ing a central longitudinal band 3 there- Bev 1t known that I, PHILIP WERNIOK, a around except for small portions in the lonsubject of the King of Great Britain, and gitudinal center of the top and bottom re resident of 14 Nassau St, in the city of spectively which are left flat to permit of Toronto, county of York, Province of Onsecuring various parts thereto as will be tario, Dominion of Canada, have invented certain new and useful Improvements in Levels, of which the following is a specification.
The invention relates to improvements in levels as described in the present specification and shown in the accompanying drawings that form a part of the same.
The objects of the invention are toproduce a level which will be instantaneous in its action as Well as absolutely true, to pro vide a means for adjusting the various parts when necessary owing to warping of the cas; ing or for other reasons and generally to provide a form of level which will be inexpensive to construct, durable and efiicient.
In the drawings, Figure 1 is a perspective view of the level complete.
Fig. 2 is a perspective view. of the central portion of the level with a portion of the outer casing broken away to disclose the interior.
Fig. 3 is a plan view of the top plate.
Fig. 4 is a longitudinal sectional view through the central portion of the level, said view being taken substantially on the line A-A of Fig. 3.
Fig. 5 is a vertical sectional view taken substantially on the line B-B of Fig. 1.
Fig. 6 is a perspective detail of the support for the revoluble housing for the measuring disk.
Fig. 7 is a detail in perspective of the measuring disk and housing therefor- Fig. 8 is a side view of the measuring disk. v
Fig. 9 is a perspective detail of the adjusting plate.
Like numerals of reference indicate corresponding parts in the various figures.
Referring to the drawin s, the frame of the level may be constructs of wood or any other desired material but in the present drawings is shown as consisting of a metal frame 1 having its sides for the greater portion of the length thereof open and provided with reinforcing braces 2. The frame is preferably further strengthened by formhereinafter described.
' 5 is a frame comprising a bottom. ends project ng upwardly from said bottom and narrow strips 6 connecting corresponding side edges of said ends midway of the height thereof, said frame being adapted to be secured in any desired manner within the closed central portion 7 of the frame, although shown in the drawings as having flanges 5 from the sides thereof through which may be inserted screws for suspending the frame from the top of the level.
8 is a pin or shaft transversely mounted between the strips 6 intermediate of the length thereof and forming a support on which the housing for the measuring disk revolves.
The support for the dials consists of a pair of rings 9 spaced from one another by a member 10 secured thereto by screws 11 or by other convenient means, plates 12 secured to opposite outside edges of said rings by means of one-or more of said screws 11 passing through said plates and tapering inwardly to the center'of said rings and being provided with bearings concentric with said rings and adapted to loosely accommodate the shaft 8 on which said support revolves.
The center of each of the rings 9 is occupied by a dial 1 1 preferably secured between the said rings and the dial 10 and on which are imprinted graduations distinguishable through openings 15 in the solid portions 7 of the frame 1. The graduations may be to any desired scale and placed as desired upon the dial 1% although shown in the drawings as being contained in concentric circular divisions 16 and 17.
The spacing member ,10 is also provided with graduations corresponding to those on the dials 14, said graduations being distinguishable through openings 18 through the top of the frame 1.
19 is an elongated plate encircling the openinglS in the top of the frame 1 and being secured to said top by screws 20 pro jecting therethrough, said plate being provided with side projections 21 turned down wardly within said opening 18 and bent to form a slideway on the under side thereof.
22 is a plate slightly shorter in length thanthe plate 19 and being slidably arranged in the slidewav formed by theprojections 21 and being provided with an opening 23 corresponding in size to the opening 18 in said plate 19, said plate being provided with side members 2 1 projecting downwardly over the sides of the dial support and having openings 25 thereln corresponding to the openings 15.
Transversely arranged inthe plate 22 and sides 24 and crossing the longitudinal center of each of the openings therein is a pin 26, said pins being located in the exact longitudinal center of the level and forming stationary indicators adapted when the level is in an exact horizontal plane to register with the zero mark on the dial and upon the movement of said dials indicating the inclination of the level. 1 i
It frequently happens when the frame is constructed of material other than metal that it is necessary to re-adjust the indicators 26 in relation to the dial owing to displacement due to warping etc., and to facilitate this adjustment the plate 22 is provided adjacent to one end with a longitudinally arranged slot 27 through which extends a bolt 28 from the plate 19, and adjacent to its other end being provided with a transversely disposed slot 29 adapted toaccommodate the end of an adjusting pin 30, said pin being shaped to extend rearwardly a short distance between the plates 19 and 22 and project upwardly through said plate 19 in a slotted head 31.
It will of course be apparent that upon the rotation of the head 31 of the pin 30 longitudinal movement will be imparted to the plate 22 thus permitting of the adjustment of same.
32 is a rule vertically arranged on the end of the level and slidable thereon by means of a set-screw 33 projecting through a slot in said rule and entering the frame of the level, said rule preferably being provided with a handle 34 for adjusting same.
In the use of this invention any inclina tion of the frame 1 from a true horizontal plane will cause a rotary movement of the dial support to regain its equilibrium with the plates 12 lowermost and by observing the position of the graduations in relation to the stationary indicators 26 the exact inclination of the level is obtained.
The exact inclination of the level may also be measured by raising said level to a true horizontal position and lowering the rule 32 into engagement with the surface being tested.
hen the indicators have become displaced and require re-adjusting it is simply forcing longitudinal central bends and view openings in said central portion, a frame located Within said partitioned portion and being supported from the top'wall of the level frame, a pin transversely mounted in bearings centrally of said frame, an annulardial having side plates extending to the center thereof and supported on said. pin, said plates forming gravity members for said r0- tary dial support, dials closing in the sides and periphery of said'support and visible through said view openings, a plate closing in said central portion on the top and having a view opening therethrough, a sight frame sliding in the underside of said top plate and having view openings and sights thereacross appearing through the aforesaid view openings and means. for adjusting said sight frame.
2. A level comprising a frame in open structural formation between a central partitioned portion and ends and having reinforcing longitudinal central bends and View openings in said central portion, a frame located within said partitioned portion and being supported from the top wall of the level frame, a pin transversely mounted in bearings centrally of said frame, an annular dial support havin side plates extending to the center thereo and supported on said pin, said plates forming gravity members for said rotary dial support, dials closing in the sides ahd periphery of said support and visible through said View openings, a closure for the top of said central portion and having a view opening therethrough and downwardly dependin flanges forming a slide way, a plate slicing in said slideway and having downwardly extending sides and forming a sight frame, view openings through said plate and said sides, transverse pins located centrally of said view openin s and forming sights observable through said view openings, said plate being slotted longitudinally and transversely adjacent to opposite ends respectively, a pin from said closure engaging the longitudinal slot, and a headed pin extending through said closure and having an offset end registering with said transverse slot and adapted on the rotation of said head to adjust said sight frame longitudinally.
igned at Tororto, Ont, this 7th day of June, 1919.
1V. G. HAMMOND, C. A. RICHARDSON.