Improvements in or relating to spirit and like levels and/or plumb rules
Реферат: 483,930. Levels. RABONE & SONS, Ltd., J., and GODFREY, A. H. Nov. 18, 1936, No. 31537. [Class 97 (ii)] The bubble tube 6 is mounted in cement in a recess in the stock 5 and the inner walls of the recess are provided with a resilient lining 8, e.g. of rubber. The lining 8 may be fixed to the walls of the recess by adhesive and the two channel-like parts 8 lining the ends of the recess may be connected by an integral strip. When the ends of the bubble tube 7 are located in tubular bores 5b, 5c, on each side of an aperture 5d, the linings 11 take the form of thimbles.
Apparatus and methods for level and/or straight edge tools
Номер патента: US09696153B1. Автор: Michael D. Morrissey. Владелец: Exceptional IP Holdings LLC. Дата публикации: 2017-07-04.