US1587258A

US1587258A - Stock for spirit levels

Info

Publication number: US1587258A
Application number: US667638A
Authority: US
Inventors: Paul H Vogel
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-10-10
Filing date: 1923-10-10
Publication date: 1926-06-01
Anticipated expiration: 1943-06-01

Description

June 1,1926. 1,587,258

- A P. H. VOGEL STOCK FOR SPIRIT LEVELS Filed Oct. lO. 1923 d] l 1 I6 l n' n "if /5 o l l llV o l I1 l l1 Z lo l5 Inv-antan' Patented June "l, 1926.

UNITED STATES PAUL H. VOGEL, `OF NEW BRITAIN, CONNECTICUT.

STOCK FOR SPIRIT LEVELS,

Application led October My invention relates to improvements in stocks for spirit levels of the form that 1s shown and described in the patent issued under date of May 13, 1919,- No. 1,303,829,

I to Gustave A. Vogel, having I-beam form for the cross-section, with top and bottom bars or flanges of aluminum and having the web portion of different metal, and the object of my improvement is to produce a stock that has for the web structure a piece of brass or copper, whereby I lind that certain improved results are attained, particularly in the detail of manufacture.

In the accompanying drawing z- Figure 1 is a side elevation of my improved stock as incorporated in a complete level structure.

Figure 2 is a side elevation on an enlarged scale of part of the structure that is shown 20 in Fig. 1, and in part broken away along one of the bars or flanges.

Figure 3 is an end elevation of the same.

Figure 4 is a sectional view on the line 4-4 of Fig. 2. l

In the structure shown in the drawing the stock is provided with an opening 11 at the `middle and with an opening 12 adjacent each end for the indicating glasses, comprising the level glass 13 at the middle and the plumb glasses 14 at the ends.

Said stock 10 comprises the web 15 in the form of an elongated sheet metal plate that is bordered along the top and bottom edges by the bars or flanges 16, the structure as a whole having in cross-section the general form of an I-beam.

As a detail, along the border portions 17 of the web l on each edge portion is a series of openings 18 that are covered by the bars or flanges 16 and serve to hold the parts together by reason of metal from the bars or flanges 16 entering therein during the casting thereof.

The bars or flanges 16 are made of alumi l0, 1923. Serial No. 667,638.

While brass is mentioned and is preferred,

it is understood that copper' could be used with corresponding good results from a util` C structure 19 is obtained directly and without special finishing, whereas with a plate of steel such finishing, involving the trimming oil' of a lin, is a common requisite for producing a satisfactory product. The superior result mentioned is obtained by the use of the same'molds and a brass plate of the same size and thickness as the plate of steel in the previous form of structure.

Also, the details of the casting operation are materially simpler in the use of the brass plate over those involved in the use of the plate of steel.

Thus, with steel chills are necessary in casting to prevent damage to the flanges by breakage at the points adjacent the glasses.k

lllithout the chills a break will occur across the flange, due to the effects of expansion and shrinkage that occur because of the differences in temperature and changes in tem,- perature of the parts.

With a web made of brass, or copper, or copper-alloy no such damages to the flanges occur and with no chills used in casting.

I claim as myA invention s A stock for a level having an I-beam form of cross-section, comprising a web in the form of a piece of sheet metal and llangestructures extending along the opposite border edges of said web and being made of cast aluminum, anchorage means being provided Y in the form of p'erforations distributed along said edges and filled with cast material integral with said flange-structures, said web having a set of openings for indicating glasses, and the material for said web being brass.

PAUL H. VOGEL.