Gas and liquid contact apparatus – With external supply or removal of heat – Combined
Patent
1988-10-11
1990-01-16
Oberleitner, Robert J.
Gas and liquid contact apparatus
With external supply or removal of heat
Combined
248565, 267150, F16M 100, F16M 1300, F16F 100
Patent
active
048937967
DESCRIPTION:
BRIEF SUMMARY
This invention relates to vibration isolators. The invention is particularly concerned with a vibration isolator which may be used, preferably in an appropriate plurality, to support electrical or electronic equipment, such as a television display tube, relative to a frame or other member which is subject to vibration so that corresponding vibration of the equipment is at least substantially reduced. However the isolator is intended to have a more general utility in other contexts where transmission of vibration is to be substantially reduced.
It is generally known to provide anti-vibration couplings, normally comprising a foot which can be secured to equipment requiring isolation from vibrations and includes elastomeric material. such isolators are not particularly efficacious particularly at local frequencies for example in the range of 5 to 50 Hertz. It is the general object of the invention to provide an improved isolator and it is a particular object of the invention to provide an isolator which can provide attenuation of vibrations at low frequencies which may affect the stability of a display produced by a television or other display tube used in a sea going vessel.
The present invention generally comprises an assembly including a pendulum which is mounted relative to a base by a spring support that provides resilience lengthwise of the pendulum and which allows the pendulum to execute swinging movement, the pendulum having remote from the end supported by the spring a pivoted coupling. The base may be attached to or form part of a structure which is subject to vibration and the pivoted coupling may be connected to the equipment or other assembly which is to be isolated from vibration. Very preferably the assembly includes a pneumatic damper which may take the form of a piston mounted for sliding movement relative to the pendulum and disposed to form a pneumatic chamber with the pendulum assembly.
Preferably the spring support is constituted by a helical spring disposed between a base member and part of the pendulum assembly, the pendulum being arranged to pivot about a point within the ambit of the spring. The aforementioned coupling may comprise a ball joint which is adapted for connection to the equipment to be isolated.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 illustrates in slightly simplified form one embodiment of a vibration isolator according to the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
the embodiment shown by way of example in FIG. 1 is intended for securing to a frame or support 1 which may be subject to vibration which for the purpose of discussion may be resolved into vibration in three axes, the X and Y axes being in the horizontal plane (as shown in the Figure) and the Z axis being vertical. however the embodiment may accommodate tilting of, for example, about 10.degree. from the normal to the plane of the member 1 representing the supporting structure.
The isolator includes a base member 3 which may be, as shown in the Figure, adapted for reception in an aperture 2 in the structure 1, the base member 3 being of generally circular form being retained by a circular clip 4 within the aforementioned aperture and having an outer upturned lip 5 and an inner tubular part 6 terminating at its upper end in an inwardly turned rim 7.
A major component of the isolator is a pendulum assembly one end of which is constituted by a cap 8 having a cylindrical wall 9 extending axially of the assembly and an outwardly extending rim 10 forming a shoulder with the wall 9. A spring support is disposed between the base member 3 and one end of the pendulum assembly and in this embodiment the spring support is constituted by a helical spring 11 engaging the aforementioned shoulder of the cap 8 and retained at its lower end within the upturned rim 5 of the base 3.
Secured by a bolt 12 within a bush 13 disposed centrally of the cap 8 is a tie rod 14 which constitutes the main part of the pendulum assembly. At the other end of the tie rod is a pivoted coupling, in this embodiment in th
REFERENCES:
patent: 2335834 (1943-11-01), Wood
patent: 2941777 (1960-06-01), Aller
patent: 3348796 (1967-10-01), Baratoff et al.
Boshier Raymond H.
Hickman Derek F.
Oberleitner Robert J.
Racal Marine Electronics Limited
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