Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
A spirit level comprising, in combination: a. a frame having a web and at least one longitudinal flange disposed on an edge of said web, b. said web having an opening disposed therein, and said flange having a window opening disposed therein adjacent to and continuous with said web opening, c. a window element having a window portion disposed in said window opening, a window portion extending toward said web opening, and a central portion which forms first and second locating ledges extending longitudinally beyond said window portions, d. and a bubble vial assembly comprising a pair of cases mounted on opposing sides of said web opening, e. the first of said cases engaging said first locating ledge to hold said window element tightly against said flange, f. and the second of said cases and said second locating ledge being spaced apart to provide for adjustment of said second case parallel to the plane of said web, said second case having a bubble vial mounted thereon.
Claim 2
Dependent Claim
166 words
A spirit level comprising, in combination: a. a frame having a web and at least one longitudinal flange disposed on an edge of said web, b. said web having an opening disposed therein, and said flange having a window opening disposed therein adjacent to and continuous with said web opening, c. a window element having a window portion disposed in said window opening, a window portion extending toward said web opening, and a central portion which forms first and second locating ledges extending longitudinally beyond said window portions, d. and a bubble vial assembly comprising a pair of cases mounted on opposing sides of said web opening, e. the first of said cases engaging said first locating ledge to hold said window element tightly against said flange, f. and the second of said cases and said second locating ledge being spaced apart to provide for adjustment of said second case parallel to the plane of said web, said second case having a bubble vial mounted thereon.
Claim 3
Dependent Claim
21 words
The spirit level of claim 1 wherein: a. the said first case comprises a dummy case void of a bubble vial,
Claim 4
Dependent Claim
31 words
In the spirit level of claim 1: a locating ring extending from said second case into said web opening and with said ring providing for rotational adjustment of said second case.
Claim 5
Dependent Claim
48 words
The spirit level of claim 1 wherein: first said ledge is of a thickness corresponding to the distance between said first case and said flange, the second said ledges being thinner than said first ledge to thereby provide the spacing between said window element and said second case.
Claim 6
Dependent Claim
25 words
The spirit level of claim 1 wherein: each said case is recessed and with each recess receiving an edge of said second named window portion.
Claim 7
Dependent Claim
57 words
The spirit level of claim 1 wherein: a. said web opening is cut away outwardly toward said flange to provide a pair of spaced transverse edges between which the window opening portion of said web is exposed, b. and the said ledges are elongated and spaced apart adjacent their ends, thereby forming slots receiving said transverse edges.
Claim 8
Dependent Claim
20 words
The spirit level of claim 6 wherein: the said first case comprises a dummy case void of a bubble vial.
Claim 9
Dependent Claim
31 words
In the spirit level of claim 6: a locating ring extending from said second case into said web opening and with said ring providing for rotational adjustment of said second case.