Pressure gauge

A pressure gauge comprising a case, a push rod carried by said case and adapted to be coupled at one end to a source of pressure to be measured, lever means having one end coupled to the other end of said push rod, said lever means comprising a unitary structure including a plurality of levers, said unitary structure including reduced cross sectional areas defining pivot points for said levers, spring means coupled to the other end of said lever means, said spring means including first and second tapes secured together at one end, the other end of said first tape being secured to said lever means, the other end of said second tape being secured to said case, and indicator means disposed at said one end of the first and second tapes.

A pressure gauge comprising a case, a push rod carried by said case and adapted to be coupled at one end to a source of pressure to be measured, lever means having one end coupled to the other end of said push rod, said lever means comprising a stamped sheet of metal defining a plurality of lever portions and base portions each having relatively large cross sectional areas, and fulcrum portions having relatively small cross sectional areas defining interconnections between said base portions and said lever portions, and spring means coupled to the other end of said lever means, said spring means including first and second tapes secured together at one end, the other end of said first tape being secured to said lever means, and the other end of said second tape being secured to said case, and indicator means disposed at said one end of the first and second tapes.

A pressure gauge comprising a case, a push rod carried by said case and adapted to be coupled at one end to a source of pressure to be measured, lever means having one end coupled to the other end of said push rod, said lever means comprising a unitary structure including first and second levers, first and second bases and a link, a first fulcrum portion having a relatively small cross sectional area defining an interconnection between said first lever and said first base, a second fulcrum portion having a relatively small cross sectional area defining an interconnection between said second lever and said second base, a first connection portion having a relatively small cross sectional area defining an interconnection between said first lever and one end of said link and a second connection portion having a relatively small sectional area defining an interconnection between said second lever and the other end of said link, and spring means coupled to the other end of said lever means, said spring means including first and second tapes secured together at one end, the other end of said first tape being secured to said lever means, and the other end of said second tape being secured to said case, and indicator means disposed at said one end of the first and second tapes.

In a gauge, a movaeble element whose movement is to be measured, a laminated spring for amplifying mechanical motion, said spring comprising first, second and third tapes secured together at one end, the third tape being intermediate the first and second tapes and being formed of material having a low coefficient of friction with respect to said first and second tapes whereby differential movement between said first and second tapes is facilitated, the other end of said first tape being secured in a fixed position, the other end of said second tape being coupled to said moveable element, and indicator means disposed to said one end of the first and second tapes.

In a gauge, a case, a moveable element whose movement relative to said case is to be measured, a lever system for amplifying said movement, said lever system comprising a unitary structure including first and second levers, first and second bases and a link, said first and second bases being secured to said case, a first fulcrum portion having a relatively small cross sectional area defining an interconnection between said first lever and said first base, a second fulcrum portion having a relatively small cross sectional area defining an interconnection between said second lever and said second base, a first connection portion having a relatively small cross sectional area defining an interconnection between said first lever and one end of said link and a second connection portion having a relatively small cross sectional area defining an inteconnection between said second lever and the other end of said link, means for coupling said moveable element to said first lever and indicator means coupled to said second lever.