Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
169 words
A glass having a thermal expansion coefficient (α) of 80.1 to 110.2 × 10 - 7 /° C. (20° -300° C), a transformation temperature (Tg) of between 428 and 488° C., a density (D) of 2.70 to 2.84 g/cc, a softening temperature (E W ) between 596° and 634° C. and a working temperature (V A ) between 792° and 863° C., said glass being produced from a melt having a composition expressed in percentages by weight as follows: ______________________________________
SiO.sub.2 50.9 to 60.4,
B.sub.2 O.sub.3 1.5 to 11.5,
Al.sub.2 O.sub.3 2.5 to 5.3,
Li.sub.2 O 0.75 to 3.0,
Na.sub.2 O 6.0 to 15.0,
K.sub.2 O 0 to 3.8,
Li.sub.2 O + Na.sub.2 O
8.0 to 17.3,
Li.sub.2 O + Na.sub.2 O + K.sub.2 O
11.0 to 19.7,
CaO 0 to 1.5,
BaO 0 to 12.9,
ZnO 0 to 7.3,
PbO 0 to 17.5,
BaO + PbO 7.0 to 17.8,
Fe.sub.3 O.sub.4 3.3 to 5.0,
F.sub.2 0 to 0.7,
Sb.sub.2 O.sub.3 0.05 to 0.1,
Sugar 0.05 to 0.1.
______________________________________
Claim 2
Dependent Claim
169 words
A glass having a thermal expansion coefficient (α) of 80.1 to 110.2 × 10 - 7 /° C. (20° -300° C), a transformation temperature (Tg) of between 428 and 488° C., a density (D) of 2.70 to 2.84 g/cc, a softening temperature (E W ) between 596° and 634° C. and a working temperature (V A ) between 792° and 863° C., said glass being produced from a melt having a composition expressed in percentages by weight as follows: ______________________________________
SiO.sub.2 50.9 to 60.4,
B.sub.2 O.sub.3 1.5 to 11.5,
Al.sub.2 O.sub.3 2.5 to 5.3,
Li.sub.2 O 0.75 to 3.0,
Na.sub.2 O 6.0 to 15.0,
K.sub.2 O 0 to 3.8,
Li.sub.2 O + Na.sub.2 O
8.0 to 17.3,
Li.sub.2 O + Na.sub.2 O + K.sub.2 O
11.0 to 19.7,
CaO 0 to 1.5,
BaO 0 to 12.9,
ZnO 0 to 7.3,
PbO 0 to 17.5,
BaO + PbO 7.0 to 17.8,
Fe.sub.3 O.sub.4 3.3 to 5.0,
F.sub.2 0 to 0.7,
Sb.sub.2 O.sub.3 0.05 to 0.1,
Sugar 0.05 to 0.1.
______________________________________
Claim 3
Dependent Claim
70 words
A glass according to claim 1, which is substantially lead oxide and fluorine-free and in which the percentages by weight of the following constituents of the melt are as follows: ______________________________________
Na.sub.2 O 8.0 to 15.0,
Li.sub.2 O + Na.sub.2 O
11.0 to 14.1,
Li.sub.2 O + Na.sub.2 O + K.sub.2 O
15.0 to 19.7,
BaO 7.0 to 12.9,
ZnO 0 to 6.5,
BaO + ZnO 13.5 to 17.0.
______________________________________
Claim 4
Dependent Claim
64 words
A glass according to claim 1, in particular for use in conjunction with a magnetic alloy containing 48.5% Fe/48.5% Co/3% V, said glass being produced from a melt having substantially the following percentage composition by weight: ______________________________________
SiO.sub.2 56.5,
B.sub.2 O.sub.3 7.2,
Al.sub.2 O.sub.3 4.0,
Li.sub.2 O 2.0,
Na.sub.2 O 9.0,
PbO 12.8,
BaO 5.0,
Fe.sub.3 O.sub.4 3.5,
Sb.sub.2 O.sub.3 0.1,
Sugar 0.05.
______________________________________
Claim 5
Dependent Claim
64 words
A glass according to claim 2, in particular for use in conjunction with a magnetic alloy containing 48.5% Fe/48.5% Co/3% V, said glass being produced from a melt having substantially the following percentage composition by weight: ______________________________________
SiO.sub.2 56.0,
B.sub.2 O.sub.3 8.0,
Al.sub.2 O.sub.3 4.0,
Li.sub.2 O 3.0,
Na.sub.2 O 8.0,
BaO 12.2,
ZnO 4.8,
Fe.sub.3 O.sub.4 4.0,
Sb.sub.2 O.sub.3 0.1,
Sugar 0.05.
______________________________________
Claim 6
Dependent Claim
66 words
A glass according to claim 1, in particular for use in conjunction with a magnetic alloy containing 29.2% Fe/55.0% Co/11.8% Ni/1% Al/3% Ti, said glass being produced from a melt having substantially the following percentage composition by weight: ______________________________________
SiO.sub.2 58.0,
B.sub.2 O.sub.3 6.7,
Al.sub.2 O.sub.3 5.0,
Li.sub.2 O 2.0,
Na.sub.2 O 12.1,
PbO 7.1,
BaO 5.8,
Fe.sub.3 O.sub.4 3.3,
Sb.sub.2 O.sub.3 0.1,
Sugar 0.05.
______________________________________
Claim 7
Dependent Claim
64 words
A glass according to claim 2, in particular for use in conjunction with a magnetic alloy containing 29.2% Fe/55.0% Co/11.8% Ni/1% Al/3% Ti, said glass being produced from a melt having substantially the following percentage composition by weight: ______________________________________
SiO.sub.2 58.0,
B.sub.2 O.sub.3 6.7,
Al.sub.2 O.sub.3 5.0,
Li.sub.2 O 3.0,
Na.sub.2 O 11.1,
BaO 12.9,
Fe.sub.3 O.sub.4 3.3,
Sb.sub.2 O.sub.3 0.1,
Sugar 0.05.
______________________________________
Claim 8
Dependent Claim
69 words
A glass according to claim 2, in particular for use in conjunction with a magnetic alloy containing 12% Fe/3% Nb/up to 0.3% Ta/approx. 85% Co, said glass being produced from a melt having substantially the following percentage composition by weight: ______________________________________
SiO.sub.2 57.6,
B.sub.2 O.sub.3 3.5,
Al.sub.2 O.sub.3 5.3,
Li.sub.2 O 1.5,
Na.sub.2 O 15.0,
K.sub.2 O 3.2,
BaO 10.0,
Fe.sub.3 O.sub.4 3.8,
Sb.sub.2 O.sub.3 0.1,
Sugar 0.05.
______________________________________
Claim 9
Dependent Claim
20 words
In a reed switch comprising a magnetic alloy bonded to glass, the improvement comprising employing the glass of claim 1.
Claim 10
Dependent Claim
20 words
In a residual switch comprising a magnetic alloy bonded to glass, the improvement comprising employing the glass of claim 3.
Claim 11
Dependent Claim
20 words
In a residual switch comprising a magnetic alloy bonded to glass, the improvement comprising employing the glass of claim 4.
Claim 12
Dependent Claim
20 words
In a residual switch comprising a magnetic alloy bonded to glass, the improvement comprising employing the glass of claim 5.
Claim 13
Dependent Claim
20 words
In a residual switch comprising a magnetic alloy bonded to glass, the improvement comprising employing the glass of claim 6.
Claim 14
Dependent Claim
20 words
In a residual switch comprising a magnetic alloy bonded to glass, the improvement comprising employing the class of claim 7.
Claim 15
Dependent Claim
107 words
A glass according to claim 1, said glass being produced from a melt having a composition expressed in percentages by weight as follows: ______________________________________
SiO.sub.2 56 to 60.4
B.sub.2 O.sub.3 1.5 to 7.0
Al.sub.2 O.sub.3 4.0 to 5.3
Li.sub.2 O 1.7 to 2.5
Na.sub.2 O 9.5 to 15.0
K.sub.2 O 0 to 1.5
Li.sub.2 O + Na.sub.2 O
11.2 to 17.3
Li.sub.2 O + Na.sub.2 O + K.sub.2 O
12.0 to 19.0
CaO 0
BaO 4.5 to 12.9
ZnO 0
PbO 0 to 12.0
BaO + PbO 11.3 to 16.8
Fe.sub.3 O.sub.4 3.5 to 4.0
F.sub.2 0
Sb.sub.2 O.sub.3 0.05 to 0.1
Sugar 0.05 to 0.1
______________________________________
Claim 16
Dependent Claim
20 words
In a residual switch comprising a magnetic alloy bonded to glass, the improvement comprising employing the glass of claim 14.