US3101228A - Mounting system - Google Patents

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US3101228A
US3101228A US130171A US13017161A US3101228A US 3101228 A US3101228 A US 3101228A US 130171 A US130171 A US 130171A US 13017161 A US13017161 A US 13017161A US 3101228 A US3101228 A US 3101228A
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enclosure
walls
base
housing
vibration
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US130171A
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Edward J Olowinski
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Lord Manufacturing Co
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Lord Manufacturing Co
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Priority to GB24639/62A priority patent/GB965134A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
    • F16F3/10—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction

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  • This invention is a mounting system for protecting sensitive equipment from shock, noise, and vibration.
  • One use is in mobile ground equipment for missile control, some of which is so sensitive that when unprotected, its performance is affected by normal conversation in the immediate area.
  • FIG. 1 is a perspective of the mounting system
  • FIG. 2 is a section through one of the mountings
  • FIG. 3 is a section through one of the members for reinforcing and damping the enclosure for the equipment
  • FIG. 4 is a side view of the mounting system
  • FIG. 5 is an end view of the mounting system.
  • the principal parts of the mounting system consist of an acoustical enclosure 1, a base 2 in the form of two longitudinally extending channels, mountings 3 arranged at the four corners of the enclosure'to support the enclosure on the base, and a rack 5 on which-the equipment to Y be. protected is mounted.
  • Mechanical bracing of the walls of the enclosure is provided by damped structural members 12 extending'peripherally around the center of the enclosure and diagonally across the endpanels and on either side of the center of the enclosure. These structural members .provide reinforcement and at the same time provide reinforcement without creating a metallicpath between inner and outer sheet metal-walls, and with the introduction of damping :intothe composite structure.
  • corn- 1 prise an inverted channel section lG and two single sections 14 with one side flange 14a adjacent and extending up along one side of the channel and with the other flange 14b extending outwardly away from the channel.
  • the sides 14a have a plurality of longitudinally spaced slots 15 extending substantially the full height'of the sides of the channel.
  • the angleiseotions alone have little strength and tendto-bend about an axis close to the plane of the flanges 14b.
  • a layer 16 of highly dampedelastomeric material is bonded to the outside surface of the sides of the channel and is also bonded to the adjacent surface of the flanges 14a. Wl1eninsta1led, the flanges 14b are attached to the. inner walls 4 and 9- and the bottom of the channel 13 is attached to the outer walls 7 andltl.
  • the magnification is increased if any 1 of these frequencies correspond to natural modes of vibration associated with the internal dimensions of the enclosure.
  • the transmission is decreased by two expedients.
  • the damped structural members 12 increase the rigidity and raise the natural frequenciesfiof the enclosure 3,101,228 PatentedAug. 20, 1963 above the critical operating frequency range of 0-400 c.-p.s.
  • the .structuralmembers 12 also provide damping which is effective for frequencies in which the walls of outerand inner shells move in unison as well as for higher frequencies which may produce some independence of motion.
  • the members 12 do not reduce a large'scale vibration of the outer shell tosmaller motions of the inner.
  • the members'12 reduce the responseof the cornbined. structure, compared to'the vibration it would experience if undamped. Hence, conditions inside the box are improved. Thereis a further attenuation or absorption of acoustical energy by the damping of the structure by the foam 11. Gaskets18, also of highly damped elastomeric material,.are arranged between the removableend panels and the. endsof the housing. The result is an acoustical enclosure which has an attenuation averaging 15 db throughout the entirev frequency band up to 2500 cycles per second. The'attenuationis better than 15 db .throughout the. criticalopenating frequency range of zero to 10 0 cycles per second.
  • the acoustical .enclosure 1 is supported on the base members 2 by mountings3 arranged at the four corners of the enclosure.
  • Each ofthese mountings comprises a housing11'9 attached to the base 1 channel2 and an upstanding post. 20, extending out through a centeropening 21 in the top of the housing and suitably attached to the acoustical enclosure.
  • At the lower end of the post.20 is an enlarged head 22 embedded in abody v23 of highly damped el-astomer having upwardly and -.1 downwardly extending annular flanges 24 and 25 above ,and below the head 2r2.and a radial flange 26 opposite the head.
  • the radial flange 26 is tomeric material.
  • the lower flange 25 is similarly spaced 1 above a horizontal Wall 29 of the liner .28 andthe upper --flange 24 is spaced belowa grommet 3-0 snapped over the edge of the opening 21 in the topwall of the housing.
  • the li-ner27 and grommet 28 are made of the same material as the body 23-. While thereis normally no con- :tactbetween the flanges 24, 25 and 26, and the adjacent Lparts of the; housing, upon excessive movement the flanges .do make.contact;and limit the movement. In each case,
  • the contact is between an elastomeric flange (24,25, 26-) and an. adjacent elastomeric part on the housing (30, G9,
  • the function of the body 23 and its associated yflanges is to limit excessive excursion such as might occur --during shock or resonance conditions.
  • the vibration isorlation is effected by a coil spring 31 having its lower end *seatedon aseat 32 on the bottom wall 3 3 ofthehousing andhaving'its upper endseated on a seat 34 embedded in and bonded to the under side of the elastorneric body .23.
  • the upper side of the spring seat 34 is spaced below .the head 22 so there is no direct metal-to-metal connection through which vibration and noise could be trans- 'mitted.
  • the springs '31 are relatively soft so asto provide-good vibration isolation.
  • acoustical enclosure 1 On opposite side walls of the acoustical enclosure 1 are opposed longitudinally extending channels 35 slidab ly receiving the rack 5 on which the equipment to be protected is mounted. At the..four.corners of the rack are rubber mountings 37 which. provide avibrat-ion isolating connection from the equipmentrto. the rack. , The mountings 37 areprimarily for theisolationof high frequency 'vi- 1 bration. 'The-raek is held in its operatingposition by a releasable catch 38.
  • the removable end panels of the housing have projecting prongs 39 which fitv in complementary recesses in the ends of the rack and hold it in place.
  • a ground strap 40' extends between one of the base channels 2 and the acoustical housing.
  • One wall of the acoustical housing is provided with electrical connectors 41 through which connection is made to the equipment inside the housing.
  • a mounting system comprising an acoustical enclosure having spaced inner and outer metal walls and a structural connection between the walls including a highly clamped elastomer, a rack within and supported by the enclosure, elastomeric mountings on the rack for supporting equipment within the enclosure, a plurality of mountings for supporting the enclosure each comprising a hous ing having top, bottom and side walls with an opening in the top wall, a member extending out through said opening and connected in load carrying relation into said enclosure, a coilspring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, a body of highly damped elastomer within the housing having projecting flanges normally spaced from the walls of the housing so as to contact the Walls and limit the excursion during shock but not to contact the walls during the normal excursion during vibration, the upper seat being bonded to said body, and said member being embedded in and bonded to said body in spaced relation to said upper spring seat.
  • a mounting system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, elastomeric mounting means within the enclosure for supporting equipment, said means being proportioned to isolate high frequency vibration from the supportedequipment, a plurality of mountings for supporting the enclosure each comprising a soft spring proportioned to isolate low frequency vibrations, a base, a load carrying connection from one end of the spring to the base, a load carrying connection from the other end of the spring to the enclosure, said last mentioned connection including an elastomeric section, and snubbing means having elastomeric parts respectively connected to the base and to the enclosure and spaced from each other during the normal excursion of the enclosure relative to the base during vibration and coming into contact with each other to limit the larger excursion of the enclosure relative to the base during shock.
  • a mounting :system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, vibration isolating means within the enclosure for supporting equipment within the enclosure, a plurality of mountings for supporting the enclosure each comprising a housing having top, bottom and side walls with an opening in the top wall, a member extending out through said opening and connected in load carrying relation into said enclosure, a coil spring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, a body of highly damped elastomer within the housing having projecting flanges normally spaced respectively from the top, bottom and side walls of the housing so as to contact the walls and limit the excursion during shock but not to contact the walls during the normal excursion during vibration, the upper seat being bonded to said body, and said member being embedded in and bonded to said body in spaced relation to said upper spring seat.
  • a resilient mounting comprising a housing having top, bottom and side walls with: an opening in the top wall, a member extending out through said opening and for connection to a load, a coil spring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, a body of highly damped elastomer within the housing having projecting flanges normally spaced from the walls of the housing so as to contact the walls and limit the excursion during shock but not to contact the walls during the normal excursion during vibration, the upper seat being bonded to said body, and said member being embedded in said body in spaced relation to said upper spring seat.
  • a resilient mounting comprising a housing having top, bottom and side walls with an opening in the top wall, a member extending out through said opening for connection to a load, a coil spring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, an elastomeric lining for the housing, a body of highly damped elastomer within the housing having projecting flanges normally spaced respectively from the lining so as to contact the lining and limit the excursion during shock but not to contact the lining during the normal excursion during vibration, the upper seat being embedded in said body, and said member being embedded in said body in spaced relation to said upper spring seat.
  • a resilient mounting comprising a housing having top, bottom and side walls with an opening in the top wall, a member extending out through said opening for connection to a load, a coil spring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, a body of highly damped elastomer within the housing having a plurality of annular flanges respectively projecting upwardly, downwardly land outwardly from said, body and respectively normally spaced from the walls of the housing so as to contact the walls and limit the excursion during shock but not to contact the walls during the normal excursion during vibration, the upper seat being bonded to said body, and said memberbeing embedded in said body in spaced relation to said upper spring seat.
  • a mounting system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, means within the enclosure for supporting equipment to be protected, a plurality of mountings for supporting the enclosure each comprising a coil spring having spring seats at upper and lower ends, a supporting member carrying the lower spring seat, a body of highly damped elastomer carrying the upper spring seat, a load carrying connection from the elastomer to the enclosure, said connection being spaced from the upper spring seat, and a structure spaced from the elastomer under the normal excursion during vibnation and having surfaces coming into engagement with the elastomer under the larger excursions during shock for limiting such excursion.
  • a mounting system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, means within the enclosure for support-ing equipment to be protected, a plurality of mountings-for supporting the enclosure each comprising a coil spring having spring seats at upper and lower ends, a supporting member carrying the lower spring seat, a body of highly damped elastomer carrying the upper spring seat, a load carrying connection from the elastomer to the enclosure, said connection being spaced from the upper spring seat, and a structure spaced from the elastomer under the normal excursion during vibration and having surfaces coming into engagement with the elastomer under the larger excursions during shock for limiting such excursion, and a coating of highly damped elastomer on said surfaces for absorbing energy of impact.
  • a mounting system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, means within a? enclosure for supporting equipment to be protected, vibration isolating means for supporting the enclosure comprising a soft spring means proportioned to isolate spaced irom the upper spring sea-t, and a structure spaced from the elastomer under the normal excursion during load carrying connection firom the other end of the spring to the enclosure, said last mentioned connection including an elastorneric section, and snubbing means including elas-tom'eric parts respectively connected to the base and to the enclosure and spaced from each other during the normal excursion of the enclosure relative to the base during vibration and coming into contact with each other to limit the larger excursion of the enclosure relative to the base during shock.
  • a resilient mounting comprising a coil spring having spring seats at upper and lower ends, a supporting member carrying the lower spring seat, a body of highly damped elastomer carrying the upper spring seat, a supported member, a load carrying connection from the elastomer to the supported member, said connection being vibration and having surfaces coming into engagement with the elastomer under the larger excursions during shock for limiting such excursion.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Description

E. J. OLOWINSKI MOUNTING SYSTEM Aug. 20, 1963 2 Sheets-Sheet 1 Filed Aug. 8, 1961 I INVENTOR. WW}! 0M WWW M Aug. 20, 1963 E. J. OLOWINSKI MOUNTING SYSTEM 2 Sheets-Sheet 2 Filed Aug. 8, 1961 FIG. 5
INVENTOR.. Maw/w 3,101,228 MOUNTlbIGr SYSTEM Edward J. Olowinski, Erie,--la., assignor t'o'Lord Manufacturing Company, Erie, Pa., a corporation of Pennsylvania Filed Aug. 8, 1961, Ser. No. 130,171 10 Claims. (Cl. 312-352) This invention is a mounting system for protecting sensitive equipment from shock, noise, and vibration. One use is in mobile ground equipment for missile control, some of which is so sensitive that when unprotected, its performance is affected by normal conversation in the immediate area.
In the drawing, FIG. 1 is a perspective of the mounting system, FIG. 2 is a section through one of the mountings, FIG. 3 is a section through one of the members for reinforcing and damping the enclosure for the equipment, FIG. 4 is a side view of the mounting system, and FIG. 5 is an end view of the mounting system.
'The principal parts of the mounting system consist of an acoustical enclosure 1, a base 2 in the form of two longitudinally extending channels, mountings 3 arranged at the four corners of the enclosure'to support the enclosure on the base, and a rack 5 on which-the equipment to Y be. protected is mounted.
The acoustical enclosure -1 has spaced inner and outer sheet metal walls 4=and 7 extending around the top, bottom and sides. The endsare closed by panels held [in place by nuts-8 and similanly'constructed with spaced inner and outer sheet metal walls *9 and 10. The space between the sheet metal walls is filled with an elastomeric foam 'll-which fills all void spaces between the walls and providesa damped connection between the. sheet metal walls andass-ists in making the enclosure an effective acoustical shield. Mechanical bracing of the walls of the enclosure is provided by damped structural members 12 extending'peripherally around the center of the enclosure and diagonally across the endpanels and on either side of the center of the enclosure. These structural members .provide reinforcement and at the same time provide reinforcement without creating a metallicpath between inner and outer sheet metal-walls, and with the introduction of damping :intothe composite structure.
The structural members '12, as shown in FIG. 3, corn- 1 prise an inverted channel section lG and two single sections 14 with one side flange 14a adjacent and extending up along one side of the channel and with the other flange 14b extending outwardly away from the channel. The sides 14a have a plurality of longitudinally spaced slots 15 extending substantially the full height'of the sides of the channel.
Because of'the slots, the angleiseotions alone have little strength and tendto-bend about an axis close to the plane of the flanges 14b. Betweeneach of the flanges 14a and eachof the sides of thec-hannel section is a layer 16 of highly dampedelastomeric material. This layer is bonded to the outside surface of the sides of the channel and is also bonded to the adjacent surface of the flanges 14a. Wl1eninsta1led, the flanges 14b are attached to the. inner walls 4 and 9- and the bottom of the channel 13 is attached to the outer walls 7 andltl. The metallic enclosure walls are relatively light and non rigid sheet metal and have numerous natural=modes of vibration at frequencies in the sound frequency spectrum and at these frequencies tend to transmit, and magnify sound which impinges on the walls. The magnification is increased if any 1 of these frequencies correspond to natural modes of vibration associated with the internal dimensions of the enclosure. The transmission is decreased by two expedients. First, the damped structural members 12 increase the rigidity and raise the natural frequenciesfiof the enclosure 3,101,228 PatentedAug. 20, 1963 above the critical operating frequency range of 0-400 c.-p.s. The .structuralmembers 12 also provide damping which is effective for frequencies in which the walls of outerand inner shells move in unison as well as for higher frequencies which may produce some independence of motion. The members 12 do not reduce a large'scale vibration of the outer shell tosmaller motions of the inner.
Rather, the members'12 reduce the responseof the cornbined. structure, compared to'the vibration it would experience if undamped. Hence, conditions inside the box are improved. Thereis a further attenuation or absorption of acoustical energy by the damping of the structure by the foam 11. Gaskets18, also of highly damped elastomeric material,.are arranged between the removableend panels and the. endsof the housing. The result is an acoustical enclosure which has an attenuation averaging 15 db throughout the entirev frequency band up to 2500 cycles per second. The'attenuationis better than 15 db .throughout the. criticalopenating frequency range of zero to 10 0 cycles per second.
.x'l he-structuralmembers12are described in greater de- -.tail in application. Serial :No.820,448, filed June '15, 1959.
The acoustical .enclosure 1 is supported on the base members 2 by mountings3 arranged at the four corners of the enclosure. Each ofthese mountings, as shown in detail in FIG.:2, comprises a housing11'9 attached to the base 1 channel2 and an upstanding post. 20, extending out through a centeropening 21 in the top of the housing and suitably attached to the acoustical enclosure. At the lower end of the post.20 is an enlarged head 22 embedded in abody v23 of highly damped el-astomer having upwardly and -.1 downwardly extending annular flanges 24 and 25 above ,and below the head 2r2.and a radial flange 26 opposite the head.
spaced from the vertical wall 27 of a liner ;28-of elas- Inthe normal position, the radial flange 26 is tomeric material. The lower flange 25 is similarly spaced 1 above a horizontal Wall 29 of the liner .28 andthe upper --flange 24 is spaced belowa grommet 3-0 snapped over the edge of the opening 21 in the topwall of the housing.
The li-ner27 and grommet 28 are made of the same material as the body 23-. While thereis normally no con- :tactbetween the flanges 24, 25 and 26, and the adjacent Lparts of the; housing, upon excessive movement the flanges .do make.contact;and limit the movement. In each case,
the contact is between an elastomeric flange (24,25, 26-) and an. adjacent elastomeric part on the housing (30, G9,
The function of the body 23 and its associated yflanges is to limit excessive excursion such as might occur --during shock or resonance conditions. The vibration isorlation is effected by a coil spring 31 having its lower end *seatedon aseat 32 on the bottom wall 3 3 ofthehousing andhaving'its upper endseated on a seat 34 embedded in and bonded to the under side of the elastorneric body .23. The upper side of the spring seat 34 is spaced below .the head 22 so there is no direct metal-to-metal connection through which vibration and noise could be trans- 'mitted. The springs '31 are relatively soft so asto provide-good vibration isolation. The fact that the flanges .24, 2'5 and 26 are out of contact with the internal walls of the housing is desirable for more effective vibration isolation. When-the flanges 24 to 26 doicome into. contact with the interior of the housing it is (for the purpose of protecting the supported enclosure 1 from shock.
; On opposite side walls of the acoustical enclosure 1 are opposed longitudinally extending channels 35 slidab ly receiving the rack 5 on which the equipment to be protected is mounted. At the..four.corners of the rack are rubber mountings 37 which. provide avibrat-ion isolating connection from the equipmentrto. the rack. ,The mountings 37 areprimarily for theisolationof high frequency 'vi- 1 bration. 'The-raek is held in its operatingposition by a releasable catch 38. The removable end panels of the housing have projecting prongs 39 which fitv in complementary recesses in the ends of the rack and hold it in place.
A ground strap 40' extends between one of the base channels 2 and the acoustical housing. One wall of the acoustical housing is provided with electrical connectors 41 through which connection is made to the equipment inside the housing.
What is claimed as new is:
1. A mounting system comprising an acoustical enclosure having spaced inner and outer metal walls and a structural connection between the walls including a highly clamped elastomer, a rack within and supported by the enclosure, elastomeric mountings on the rack for supporting equipment within the enclosure, a plurality of mountings for supporting the enclosure each comprising a hous ing having top, bottom and side walls with an opening in the top wall, a member extending out through said opening and connected in load carrying relation into said enclosure, a coilspring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, a body of highly damped elastomer within the housing having projecting flanges normally spaced from the walls of the housing so as to contact the Walls and limit the excursion during shock but not to contact the walls during the normal excursion during vibration, the upper seat being bonded to said body, and said member being embedded in and bonded to said body in spaced relation to said upper spring seat.
2, A mounting system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, elastomeric mounting means within the enclosure for supporting equipment, said means being proportioned to isolate high frequency vibration from the supportedequipment, a plurality of mountings for supporting the enclosure each comprising a soft spring proportioned to isolate low frequency vibrations, a base, a load carrying connection from one end of the spring to the base, a load carrying connection from the other end of the spring to the enclosure, said last mentioned connection including an elastomeric section, and snubbing means having elastomeric parts respectively connected to the base and to the enclosure and spaced from each other during the normal excursion of the enclosure relative to the base during vibration and coming into contact with each other to limit the larger excursion of the enclosure relative to the base during shock.
3. A mounting :system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, vibration isolating means within the enclosure for supporting equipment within the enclosure, a plurality of mountings for supporting the enclosure each comprising a housing having top, bottom and side walls with an opening in the top wall, a member extending out through said opening and connected in load carrying relation into said enclosure, a coil spring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, a body of highly damped elastomer within the housing having projecting flanges normally spaced respectively from the top, bottom and side walls of the housing so as to contact the walls and limit the excursion during shock but not to contact the walls during the normal excursion during vibration, the upper seat being bonded to said body, and said member being embedded in and bonded to said body in spaced relation to said upper spring seat.
4. A resilient mounting comprising a housing having top, bottom and side walls with: an opening in the top wall, a member extending out through said opening and for connection to a load, a coil spring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, a body of highly damped elastomer within the housing having projecting flanges normally spaced from the walls of the housing so as to contact the walls and limit the excursion during shock but not to contact the walls during the normal excursion during vibration, the upper seat being bonded to said body, and said member being embedded in said body in spaced relation to said upper spring seat.
5. A resilient mounting comprising a housing having top, bottom and side walls with an opening in the top wall, a member extending out through said opening for connection to a load, a coil spring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, an elastomeric lining for the housing, a body of highly damped elastomer within the housing having projecting flanges normally spaced respectively from the lining so as to contact the lining and limit the excursion during shock but not to contact the lining during the normal excursion during vibration, the upper seat being embedded in said body, and said member being embedded in said body in spaced relation to said upper spring seat.
6. A resilient mounting comprising a housing having top, bottom and side walls with an opening in the top wall, a member extending out through said opening for connection to a load, a coil spring having spring seats at upper and lower ends, the lower of the spring seats being on the bottom wall of the housing, a body of highly damped elastomer within the housing having a plurality of annular flanges respectively projecting upwardly, downwardly land outwardly from said, body and respectively normally spaced from the walls of the housing so as to contact the walls and limit the excursion during shock but not to contact the walls during the normal excursion during vibration, the upper seat being bonded to said body, and said memberbeing embedded in said body in spaced relation to said upper spring seat.
7. A mounting system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, means within the enclosure for supporting equipment to be protected, a plurality of mountings for supporting the enclosure each comprising a coil spring having spring seats at upper and lower ends, a supporting member carrying the lower spring seat, a body of highly damped elastomer carrying the upper spring seat, a load carrying connection from the elastomer to the enclosure, said connection being spaced from the upper spring seat, and a structure spaced from the elastomer under the normal excursion during vibnation and having surfaces coming into engagement with the elastomer under the larger excursions during shock for limiting such excursion.
8. A mounting system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, means within the enclosure for support-ing equipment to be protected, a plurality of mountings-for supporting the enclosure each comprising a coil spring having spring seats at upper and lower ends, a supporting member carrying the lower spring seat, a body of highly damped elastomer carrying the upper spring seat, a load carrying connection from the elastomer to the enclosure, said connection being spaced from the upper spring seat, and a structure spaced from the elastomer under the normal excursion during vibration and having surfaces coming into engagement with the elastomer under the larger excursions during shock for limiting such excursion, and a coating of highly damped elastomer on said surfaces for absorbing energy of impact.
9. A mounting system comprising an acoustical enclosure having sound attenuating walls blocking external sounds from the interior of the enclosure, means within a? enclosure for supporting equipment to be protected, vibration isolating means for supporting the enclosure comprising a soft spring means proportioned to isolate spaced irom the upper spring sea-t, and a structure spaced from the elastomer under the normal excursion during load carrying connection firom the other end of the spring to the enclosure, said last mentioned connection including an elastorneric section, and snubbing means including elas-tom'eric parts respectively connected to the base and to the enclosure and spaced from each other during the normal excursion of the enclosure relative to the base during vibration and coming into contact with each other to limit the larger excursion of the enclosure relative to the base during shock.
10. A resilient mounting comprising a coil spring having spring seats at upper and lower ends, a supporting member carrying the lower spring seat, a body of highly damped elastomer carrying the upper spring seat, a supported member, a load carrying connection from the elastomer to the supported member, said connection being vibration and having surfaces coming into engagement with the elastomer under the larger excursions during shock for limiting such excursion.
References Cited in the file of this patent UNITED STATES PATENTS Australia Apr. 4, 1940 g

Claims (1)

  1. 9. A MOUNTING SYSTEM COMPRISING AN ACOUSTICAL ENCLOSURE HAVING SOUND ATTENUATING WALLS BLOCKING EXTERNAL SOUNDS FROM THE INTERIOR OF THE ENCLOSURE, MEANS WITHIN THE ENCLOSURE FOR SUPPORTING EQUIPMENT TO BE PRETECTED, VIBRATION ISOLATING MEANS FOR SUPPORTING THE ENCLOSURE COMPRISING A SOFT SPRING MEANS PROPORTIONED TO ISOLATE LOW FREQUENCY VIBRATION, A BASE, A LOAD CARRYING CONNECTION FROM ONE END OF THE SPRING MEANS TO THE BASE, A LOAD CARRYING CONNECTION FROM THE OTHER END OF THE SPRING TO THE ENCLOSURE, SAID LAST MENTIONED CONNECTION INCLUDING AN ELASTOMERIC SECTION, AND SNUBBING MEANS INCLUDING ELASTOMERIC PARTS RESPECTIVELY CONNECTED TO THE BASE AND TO THE ENCLOSURE AND SPACED FROM EACH OTHER DURING THE NORMAL EXCURSION OF THE ENCLOSURE RELATIVE TO THE BASE DURING VIBRATION AND COMING INTO CONTACT WITH EACH OTHER TO LIMIT THE LARGER EXCURSION OF THE ENCLOSURE RELATIVE TO THE BASE DURING SHOCK.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188041A (en) * 1961-11-21 1965-06-08 Dobson Ltd W E & F Mine roof supports
US3190591A (en) * 1963-02-11 1965-06-22 Cal Val Res & Dev Corp Core assembly for an engine mount
DE3432768A1 (en) * 1984-09-06 1986-03-13 Adam Opel AG, 6090 Rüsselsheim RUBBER METAL BEARING
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US5725203A (en) * 1996-01-16 1998-03-10 Ford Global Technologies, Inc. Low cost jounce bumper
US5667202A (en) * 1996-03-19 1997-09-16 Lord Corporation Hybrid elastomer-and-metal spring isolator
US6427989B1 (en) * 1999-07-21 2002-08-06 Toyo Tire & Rubber Co. Vibration-isolating apparatus

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