Abstract: An enclosure for watthour meters includes a cover having an opening for connecting a meter data sending unit within the enclosure to an adjacent remote meter reading terminal unit. A cover locking rim has locking tabs for securing the cover to a meter base assembly so that the cover is rotatably positionable relative to the base. The rotated positions of the cover opening permit different orientations of a remote meter reading package at a fixed meter mounting position.

Abstract: A laser beam is used to spiral, or otherwise remove a portion of the resistance material from, a resistance film on a glass substrate. The glass has a radiation absorber incorporated in its composition to minimize transmission of the laser beam through the glass.

Abstract: A dense barium borosilicate glass is disclosed having a refractive index greater than 1.64 and a dispersive index of at least 53, together with a high degree of chemical durability such that optical blanks molded from the glass can be finished on automatic machinery with minimal danger of staining. The glass consists essentially of 18-30% SiO.sub.2, 8-22% B.sub.2 O.sub.3, 25-48% BaO, 0-10% other divalent metal oxides, 25-45% total divalent metal oxides, 10-30% La.sub.2 O.sub.3, 0-6% ZrO.sub.2 and/or SnO.sub.2, with the mole ratio of BaO:SiO.sub.2 not exceeding 0.6 and preferably not exceeding 0.5.

Abstract: A reed switch construction is disclosed in which the glass envelope has thermal expansion characteristics matching those of the reeds below the glass setting point, has relatively high electrical resistivity and low devitrification tendencies, and is, in percent by weight, composed essentially of 53-59% SiO.sub.2, 3-7% Al.sub.2 O.sub.3, 20-25% Na.sub.2 O + K.sub.2 O with the K.sub.2 O:Na.sub.2 O ratio being greater than 1:1 on a weight basis, 7-10% BaO, 2-6% ZnO and 1-5% Fe.sub.2 O.sub.3.

Abstract: A reed switch construction is described embodying magnetic metal reeds and an improved glass envelope. The envelope is drawn from an infrared absorbing glass having a steep viscosity curve which permits forming a seal between the metal reeds and the glass envelope with infrared heating at a temperature sufficiently low to avoid damaging the reeds.

Abstract: This invention relates to heat absorbing glass compositions exhibiting strain points in excess of 560.degree.C. and transmissions to visible radiations suitable for optical applications. Such glasses consist essentially of Fe.sub.2 O.sub.3, Na.sub.2 O, Al.sub.2 O.sub.3, SiO.sub.2, and P.sub.2 O.sub.5, wherein NH.sub.4 H.sub.2 PO.sub.4 constitutes an essential ingredient of the batch.