Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
367 words
In a pneumatic pressure transmitting device for transmitting a pneumatic pressure which is in linear relation to a variable applied force, said device comprising a body containing a pneumatic pressure chamber, inlet duct means leading to said chamber for admitting air under a pressure greater than that to be transmitted, throttling means in said inlet duct means, outlet duct means in communication with said inlet duct means downstream of said throttling means, means defining a pneumatic pressure relief opening from said chamber, a surface defining a seating surrounding said opening, a loose cover engaging said seating to close said opening, said cover being mounted for to and fro movement toward and away from said seating and being free also for lateral rocking movement relative to said seating, and a damper for damping both said to and fro and said lateral rocking movements of said cover to prevent said cover from vibrating, whereby when air is supplied under pressure through said inlet duct means to said pneumatic pressure chamber and a variable force is applied to said cover as a thrust in a direction in alignment with the resultant of the pneumatic pressure in said chamber acting on said cover, said pressure in said chamber increases until said cover is moved off said seating against said applied force to allow air to escape from said opening to such an extent that equilibrium is established between the pressure in said chamber and the variable force on said cover, said equilibrium pressure, which is in linear relation to said variable force, being transmitted through said outlet duct means, the improvement according to which said damper comprises an opentopped receptacle for receiving a damping liquid positioned outside said pneumatic pressure chamber on a face of said cover remote from said seating, a plate and means rigidly connecting said plate to said body containing said pneumatic pressure chamber and locating said plate in said receptacle so closely adjacent the bottom thereof that when said plate is submerged in said damping liquid movement of said plate away from said bottom produces a reduction in the liquid pressure on the underside of said plate which substantially inhibits said lateral rocking movement of said cover.
Claim 2
Dependent Claim
367 words
In a pneumatic pressure transmitting device for transmitting a pneumatic pressure which is in linear relation to a variable applied force, said device comprising a body containing a pneumatic pressure chamber, inlet duct means leading to said chamber for admitting air under a pressure greater than that to be transmitted, throttling means in said inlet duct means, outlet duct means in communication with said inlet duct means downstream of said throttling means, means defining a pneumatic pressure relief opening from said chamber, a surface defining a seating surrounding said opening, a loose cover engaging said seating to close said opening, said cover being mounted for to and fro movement toward and away from said seating and being free also for lateral rocking movement relative to said seating, and a damper for damping both said to and fro and said lateral rocking movements of said cover to prevent said cover from vibrating, whereby when air is supplied under pressure through said inlet duct means to said pneumatic pressure chamber and a variable force is applied to said cover as a thrust in a direction in alignment with the resultant of the pneumatic pressure in said chamber acting on said cover, said pressure in said chamber increases until said cover is moved off said seating against said applied force to allow air to escape from said opening to such an extent that equilibrium is established between the pressure in said chamber and the variable force on said cover, said equilibrium pressure, which is in linear relation to said variable force, being transmitted through said outlet duct means, the improvement according to which said damper comprises an opentopped receptacle for receiving a damping liquid positioned outside said pneumatic pressure chamber on a face of said cover remote from said seating, a plate and means rigidly connecting said plate to said body containing said pneumatic pressure chamber and locating said plate in said receptacle so closely adjacent the bottom thereof that when said plate is submerged in said damping liquid movement of said plate away from said bottom produces a reduction in the liquid pressure on the underside of said plate which substantially inhibits said lateral rocking movement of said cover.
Claim 3
Dependent Claim
17 words
A device as claimed in claim 1, wherein said receptacle is in the form of a cup.
Claim 4
Dependent Claim
40 words
A device as claimed in claim 1 wherein said plate is annular and includes a center opening, and further comprises a member extending through said center opening into engagement with said cover for applying said variable force to said cover.
Claim 5
Dependent Claim
105 words
A device as claimed in claim 3, wherein said means mounting said plate comprises a cap consisting of a peripheral skirt, means connecting said skirt to the outside wall of said body, a top which extends inwards from said skirt over the rim of said receptacle, means on said top defining a central hole through which said member for applying said variable force extends, and a part depending from the underside of said top and carrying said plate, said skirt including means defining a series of openings around it through which in operation air escaping from said chamber through said pressure relief opening is exhausted.
Claim 6
Dependent Claim
30 words
A device as claimed in claim 4, wherein said means connecting said skirt to said outside wall of said body comprises cooperating screw threads on said skirt and said wall.