Multifunctional heat dissipation type cabinet
Technical Field
The invention relates to a cabinet, in particular to a multifunctional heat-dissipation cabinet.
Background
At present, the cabinet is usually made of cold-rolled steel plate or alloy for storing the cabinet and the electronic components, and can provide a protection function for the storage equipment. Because the majority of the existing control cabinets do not have the heat dissipation function, the service life of the device is reduced.
Patent application CN212278620U, the grant announcement day is 20210101, discloses a high-efficient heat dissipation type rack with baffle structure, including base and two-way motor, party fixed mounting on the base has the work cabin, and the inside movable mounting on the work cabin has the mount pad, two-way motor is located the party on the mount pad, and one side fixedly connected with bull stick on the two-way motor, inside on the bull stick is provided with the keyway, and one side swing joint on the bull stick has the connecting rod, one side fixedly connected with main runner on the connecting rod, and one side swing joint on the main runner has the pinion, one side swing joint on the pinion has the master gear. This high-efficient heat dissipation type rack with partition structure compares with the current ordinary high-efficient heat dissipation type rack that has partition structure, and convenient and fast more during the device uses, and has more intellectuality, can avoid irrelevant personnel to the control of switch board simultaneously, has improved security, practicality and the life of device, is worth promoting. Although the above patent can radiate the internal electronic element and the chassis, when the above patent is used, after the electronic element and the chassis are put in, when the above patent shakes, the internal electronic element and the chassis easily shake, so that the positions of the electronic element and the chassis easily shift, and a connecting line connecting the electronic element and the chassis is easily loosened, thereby affecting the normal use of the electronic element and the chassis.
Therefore, aiming at the defects, the multifunctional heat dissipation type cabinet capable of fixing the chassis and the electronic elements is provided.
Disclosure of Invention
The invention aims to overcome the defect that electronic elements stored inside and a case are easy to move when most of the existing efficient heat dissipation type cabinets with partition plate structures are used by people, and provides a multifunctional heat dissipation type cabinet capable of fixing the case and the electronic elements.
The invention is realized by the following technical approaches:
the utility model provides a multi-functional heat dissipation type rack, which comprises a supporting rack, first fan, the second fan, first spacing post, splint, first spring, supporting mechanism and sheltering from the mechanism, the downside middle part of the inside left and right sides of support frame all is connected with first fan, the inside upside middle part of support frame is connected with and is used for radiating second fan, the equal front and back symmetric connection of bottom left and right sides has first spacing post in the support frame, the slidingtype is equipped with splint between the first spacing post on left, also the slidingtype is equipped with the splint that are used for fixed quick-witted case between the first spacing post on right side, the front side of splint is the inclined plane, all be connected with first spring between both sides and the support frame around the splint outside lower part, the inside upside of support frame is equipped with the supporting mechanism that is used for fixed electronic component, be equipped with on the support frame and be used for sheltering from the mechanism that shelters from the effect.
In addition, it is particularly preferred that the supporting mechanism comprises a supporting plate, second limiting columns, a first movable plate and second springs, four supporting plates are connected to the upper side inside the supporting frame at intervals, a set of second limiting columns is arranged at the top of the supporting plate, the number of each set of second limiting columns is at least two, the second limiting columns of each set are symmetrically arranged on the front side and the rear side respectively, the first movable plate is arranged between the second limiting columns of each set in a sliding mode, the front side and the rear side of the first movable plate are inclined planes, four second springs are connected between the bottom of the first movable plate and the adjacent supporting plate respectively, the number of the second springs is at least two, and the second springs are wound on the adjacent second limiting columns.
In addition, it is particularly preferable that the shielding mechanism includes a first rotating shaft, a second movable plate, a first handle, a second rotating shaft, a third movable plate, a second handle, a third rotating shaft and a fourth movable plate, the first rotating shaft is rotatably disposed on the right side of the front portion of the supporting frame, the second movable plate is connected to the first rotating shaft, the second movable plate blocks the front side of the supporting frame, the first handle is connected to the left side of the middle portion of the front side of the second movable plate, the second rotating shaft is rotatably disposed on the left side and the right side of the upper side of the rear portion of the supporting frame, the third movable plate is connected to the second rotating shaft, the third movable plate blocks the upper portion of the rear side of the supporting frame, the second handle is connected to the middle portion of the rear side of the third movable plate, the third rotating shaft is rotatably disposed on the lower side of the rear portion of the supporting frame, the fourth movable plate is connected to the third rotating shaft, and the lower portion of the rear side of the supporting frame is blocked by the fourth movable plate.
In addition, it is especially preferred, still including being used for carrying out spacing stop gear to the electronic component connecting wire, stop gear is including the fourth pivot, the fifth fly leaf, first torsional spring, the limiting plate, buckle and third spring, the inside upside rear portion interval rotary type of support frame is equipped with four fourth pivots, all be connected with the fifth fly leaf in the fourth pivot, all be connected with first torsional spring between the upper portion of the fifth fly leaf left and right sides and the support frame, first torsional spring all winds on adjacent fourth pivot, the backup pad rear side all is connected with the limiting plate, the equal interval slidingtype is equipped with the buckle on the limiting plate, all be connected with the third spring between buckle and the adjacent limiting plate.
In addition, it is especially preferred, still including the fixed establishment that is used for pushing down the electronic component connecting wire, fixed establishment is including the baffle, the supporting shoe, the fifth pivot, the movable rod, second torsional spring and cylinder, the inside downside rear portion of support frame is connected with the baffle, the equal bilateral symmetry in both sides has the supporting shoe about the baffle, equal rotary type is equipped with the fifth pivot on the supporting shoe, the fifth pivot outside all is connected with the movable rod, all be connected with the second torsional spring between support frame and the adjacent movable rod, the second torsional spring all winds on adjacent fifth pivot, the rotary type is equipped with the cylinder between the movable rod inboard of upside, also the rotary type is equipped with the cylinder between the movable rod inboard of downside.
In addition, especially preferably, the movable support further comprises a pressing mechanism, the pressing mechanism comprises third limiting columns, a first movable frame and fourth springs, the left side and the right side of the lower portion of the front side inside the support frame are both connected with the two third limiting columns, the first movable frame is arranged between the left third limiting columns in a sliding mode, the first movable frame is also arranged between the right third limiting columns in a sliding mode, the front side of the first movable frame penetrates through the support frame to be in contact with the second movable plate, the two fourth springs are connected between the first movable frame and the support frame, the left fourth springs are respectively wound on the left third limiting columns, and the right fourth springs are respectively wound on the right third limiting columns.
In addition, particularly preferably, the leakage detection device further comprises a detection mechanism for detecting leakage, the detection mechanism comprises a fourth limit column and a second movable frame, the lamp plate, fifth spring and continuous electrical apparatus, the anterior left and right sides of the inside downside of support frame all is connected with two spacing posts of fourth, the slidingtype is equipped with the second adjustable shelf between the spacing post of left fourth, also the slidingtype is equipped with the second adjustable shelf between the spacing post of fourth on right side, the second adjustable shelf lower part of the left and right sides respectively with the first adjustable shelf contact of the left and right sides, second adjustable shelf upside middle part all is connected with the lamp plate, all be connected with the fifth spring around the second adjustable shelf top between both sides and the support frame, the fifth spring all winds on adjacent spacing post of fourth, the lower part front side of the inside left and right sides of support frame all is connected with continuous electrical apparatus, can contact with the department that connects of continuous electrical apparatus when connecing the electric department downshifting of lamp plate.
Furthermore, it is particularly preferred that the lower part of the fourth flap is spaced by a recess.
The invention provides a multifunctional heat-dissipation cabinet, which has the advantages that:
1. according to the invention, the case is pushed into the support frame, the case is contacted with the clamping plate through the case, the clamping plate can clamp the case so as to fix the case, then the electronic element is placed on the support plate, and the first movable plate can press the electronic element through the contact of the electronic element and the first movable plate so as to fix the electronic element, so that the case and the electronic element are prevented from moving.
2. According to the invention, the first fan and the second fan are started, so that air can be blown to the case and the electronic element, the case and the electronic element are cooled, and the case and the electronic element are prevented from being burnt out due to overhigh temperature.
3. According to the invention, under the action of the fifth movable plate, the buckle and the roller, the connecting wires of the electronic elements can be limited, so that the connecting wires of the electronic elements are prevented from being mixed together, and further, people can subsequently maintain and replace the connecting wires.
4. According to the multifunctional heat dissipation type cabinet, under the matching of the lamp panel and the relay, people can know that the multifunctional heat dissipation type cabinet leaks electricity by lighting the lamp panel, so that electric shock of people is prevented, and the safety of people is improved.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a first partially sectional perspective structure diagram of the present invention.
Fig. 3 is an enlarged schematic perspective view of the invention at a.
Fig. 4 is a second partially cross-sectional perspective structure of the present invention.
Fig. 5 is a schematic perspective view of the supporting mechanism of the present invention.
FIG. 6 is a schematic view of a first partially-separated body structure of the shielding mechanism of the present invention.
FIG. 7 is a schematic view of a second partial structure of the shielding mechanism of the present invention.
Fig. 8 is a schematic structural view of a first partially-separated body of the limiting mechanism of the present invention.
Fig. 9 is an enlarged schematic perspective view of the position B of the present invention.
Fig. 10 is a schematic view of a second partial structure of the limiting mechanism of the present invention.
Fig. 11 is an enlarged schematic perspective view of the position C of the present invention.
Fig. 12 is a schematic perspective view of the fixing mechanism of the present invention.
Fig. 13 is an enlarged perspective view of the present invention at D.
Fig. 14 is a schematic perspective view of the pressing mechanism of the present invention.
Fig. 15 is a schematic perspective view of the detecting mechanism of the present invention.
Fig. 16 is an enlarged perspective view at E of the present invention.
Wherein the figures include the following reference numerals: 1. a support frame, 2, a first fan, 3, a second fan, 4, a first limit column, 5, a clamp plate, 6, a first spring, 7, a support mechanism, 71, a support plate, 72, a second limit column, 73, a first movable plate, 74, a second spring, 8, a shielding mechanism, 81, a first rotating shaft, 82, a second movable plate, 83, a first handle, 84, a second rotating shaft, 85, a third movable plate, 86, a second handle, 87, a third rotating shaft, 88, a fourth movable plate, 89, a groove, 9, a limiting mechanism, 91, a fourth rotating shaft, 92, a fifth movable plate, 93, a first torsion spring, 94, a limiting plate, 95, a buckle, 96, a third spring, 10, a fixing mechanism, 101, a baffle, 102, a support block, 103, a fifth rotating shaft, 104, a movable rod, 105, a second torsion spring, 106, a roller, 11, a pressing mechanism, 111, a third limit column, 112, a first movable frame, 113. fourth spring, 12, detection mechanism, 121, spacing post of fourth, 122, second adjustable shelf, 123, lamp plate, 124, fifth spring, 125, continuation electrical apparatus.
Detailed Description
The invention is further explained by combining the drawings in the specification, and the embodiments of the invention are given by combining the drawings in the specification.
Example 1
A multifunctional heat dissipation type cabinet comprises a support frame 1, a first fan 2, a second fan 3, first limit posts 4, clamping plates 5, a first spring 6, a support mechanism 7 and a shielding mechanism 8, and is shown in figures 1-7, wherein the lower middle parts of the left side and the right side inside the support frame 1 are respectively bolted with the first fan 2, the upper middle part inside the support frame 1 is bolted with the second fan 3, the cabinet and electronic components can be cooled by opening the first fan 2 and the second fan 3, the left side and the right side of the bottom inside the support frame 1 are respectively connected with the first limit posts 4 in a front-back symmetrical manner, the clamping plates 5 are arranged between the two first limit posts 4 on the left side in a sliding manner, the cabinet can be fixed by clamping the clamping plates 5, the clamping plates 5 are also arranged between the two first limit posts 4 on the right side in a sliding manner, the front sides of the two clamping plates 5 are inclined planes, the first springs 6 are respectively connected between the front sides and the rear sides of the lower parts of the outer sides of the two clamping plates 5 and the support frame 1, the supporting mechanism 7 is arranged on the upper side inside the supporting frame 1, and the shielding mechanism 8 is arranged on the supporting frame 1.
The supporting mechanism 7 includes supporting plates 71, second limiting columns 72, first movable plates 73 and second springs 74, as shown in fig. 5, four supporting plates 71 are welded at intervals on the upper side inside the supporting frame 1, a set of second limiting columns 72 is arranged at the tops of the four supporting plates 71, the number of each set of second limiting columns 72 is four, the second limiting columns 72 of each set are symmetrically arranged in the front and rear directions, the first movable plates 73 are arranged between the second limiting columns 72 of each set in a sliding manner, the electronic components can be fixed by pressing the electronic components through the first movable plates 73, the front and rear sides of the four first movable plates 73 are inclined planes, four second springs 74 are connected between the bottoms of the first movable plates 73 and the adjacent supporting plates 71, the number of the second springs 74 is sixteen, and the sixteen second springs 74 are wound on the adjacent second limiting columns 72.
The shielding mechanism 8 comprises a first rotating shaft 81, a second movable plate 82, a first handle 83, a second rotating shaft 84, a third movable plate 85, a second handle 86, a third rotating shaft 87 and a fourth movable plate 88, referring to fig. 6 and 7, the first rotating shaft 81 is rotatably arranged on the right side of the front portion of the supporting frame 1, the second movable plate 82 is connected to the first rotating shaft 81, the second movable plate 82 blocks the front side of the supporting frame 1, the first handle 83 is welded on the left side of the middle portion of the front side of the second movable plate 82, the second rotating shaft 84 is rotatably arranged on the left side and the right side of the upper side of the rear portion of the supporting frame 1, the third movable plates 85 are respectively connected to the two second rotating shafts 84, the third movable plate 85 blocks the upper portion of the rear side of the supporting frame 1, the second handle 86 is respectively connected to the middle portions of the two rear portions of the third movable plates 85, the third rotating shaft 87 is rotatably arranged on the lower side of the rear portion of the supporting frame 1, the third rotating shaft 87 is connected to the fourth movable plate 88, under the action of the second movable plate 82, the third movable plate 85 and the fourth movable plate 88, the chassis and the electronic components can be shielded, the fourth movable plate 88 blocks the lower portion of the rear side of the supporting frame 1, and the lower portion of the fourth movable plate 88 is spaced by a groove 89.
When people need to use the multifunctional heat dissipation type cabinet, firstly, the first handle 83 is pulled to rotate, the second movable plate 82 is rotated to open, then the second handle 86 is pulled to rotate, the third movable plate 85 is rotated to open, then the fourth movable plate 88 is pulled to rotate to open, then the cabinet is pushed into the support frame 1, when the cabinet is contacted with the inclined plane of the clamping plate 5, the cabinet can extrude the clamping plate 5 to move outwards, the first spring 6 is compressed, the clamping plate 5 clamps the cabinet under the elastic force of the first spring 6, so as to fix the cabinet, then, the electronic component is placed on the support plate 71, when the electronic component is contacted with the first movable plate 73, the electronic component can extrude the first movable plate 73 to move upwards, the second spring 74 is stretched, under the elastic force of the second spring 74, the first movable plate 73 presses the electronic component, so as to fix the electronic component, then, the connecting wire of the electronic component is pulled outwards through the lower part of the rear side of the support frame 1, then the first handle 83 is pushed to reversely reset, the second movable plate 82 is reversely closed, the second handle 86 is pulled to reversely reset, the third movable plate 85 is reversely closed, the fourth movable plate 88 is pushed to reversely close, the connecting line of the electronic component is positioned in the groove 89 of the fourth movable plate 88, when people need to radiate heat to the case and the electronic component, the first fan 2 and the second fan 3 can be opened, the first fan 2 and the second fan 3 can blow the case and the electronic component, so as to radiate the case and the electronic component, when people do not need to radiate the heat to the case and the electronic component, the first fan 2 and the second fan 3 are closed, when people need to maintain or take out the case and the electronic component, the second movable plate 82, the third movable plate 85 and the fourth movable plate 88 are rotated to be opened again, and then people can maintain or take out the case and the electronic component, when the chassis is separated from the clamp 5, the first spring 6 is restored, the first spring 6 drives the clamp 5 to move inward for resetting, when the electronic component is separated from the first movable plate 73, the second spring 74 is restored, the second spring 74 drives the first movable plate 73 to move downward for resetting, and when people finish maintaining or taking out the chassis and the electronic component, the second movable plate 82, the third movable plate 85 and the fourth movable plate 88 are turned reversely again to be closed.
Example 2
On the basis of the embodiment 1, the supporting device further comprises a limiting mechanism 9, the limiting mechanism 9 comprises a fourth rotating shaft 91, a fifth movable plate 92, a first torsion spring 93, a limiting plate 94, a buckle 95 and a third spring 96, as shown in fig. 4, 8, 9, 10 and 11, four fourth rotating shafts 91 are rotatably arranged at intervals at the upper rear part of the interior of the supporting frame 1, the fifth movable plate 92 is connected to the four fourth rotating shafts 91, the first torsion springs 93 are connected between the upper parts of the left and right sides of the four fifth movable plates 92 and the supporting frame 1, the eight first torsion springs 93 are wound on the adjacent fourth rotating shafts 91, the limiting plates 94 are connected to the rear sides of the four supporting plates 71, and the buckles 95 are slidably arranged on the four limiting plates 94 at intervals, the connecting line of the electronic element is clamped through the buckle 95, the connecting line of the electronic element can be limited, and a third spring 96 is connected between the buckle 95 and the adjacent limiting plate 94.
The device also comprises a fixing mechanism 10, the fixing mechanism 10 comprises a baffle 101, supporting blocks 102, a fifth rotating shaft 103, movable rods 104, second torsion springs 105 and rollers 106, as shown in fig. 4, 12 and 13, the baffle 101 is connected with the rear part of the lower side in the support frame 1, the supporting blocks 102 are symmetrically welded on the upper side and the lower side of the baffle 101 in a bilateral mode, the fifth rotating shaft 103 is rotatably arranged on four supporting blocks 102, the movable rods 104 are connected with the outer sides of the four fifth rotating shafts 103, the second torsion springs 105 are connected between the four support frames 1 and the adjacent movable rods 104, the four second torsion springs 105 are wound on the adjacent fifth rotating shafts 103, the rollers 106 are rotatably arranged between the inner sides of the two upper movable rods 104, and the rollers 106 are rotatably arranged between the inner sides of the two lower movable rods 104, the roller 106 can be pressed against the connection lines of the electronic components by the roller 106 being in contact with the connection lines of the electronic components.
When people need to pull out the connecting wires of the electronic components through the lower part of the rear side of the support frame 1, the fifth movable plate 92 is pulled to rotate, the first torsion spring 93 deforms, then the connecting wires of the electronic components are pulled to press the limiting plate 94, when the connecting wires of the electronic components contact the buckle 95, the buckle 95 is pressed by the connecting wires of the electronic components to move outwards, the third spring 96 compresses, after the connecting wires of the electronic components cross the buckle 95, the third spring 96 restores to the original state, the third spring 96 drives the buckle 95 to move inwards and restore, so that the buckle 95 clamps the connecting wires of the electronic components, the connecting wires of the electronic components are limited, then the fifth movable plate 92 is loosened, under the elastic force of the first torsion spring 93, the fifth movable plate 92 presses the connecting wires of the electronic components, then the connecting wires of the electronic components are pulled to penetrate into the baffle plate 101, and then the roller 106 is pulled to rotate, thereby driving the movable rod 104 to rotate, the second torsion spring 105 to deform, then the connecting line of the electronic component passes through the gap between the roller 106 and the baffle 101, then the roller 106 is loosened, the roller 106 is rotated reversely under the action of the second torsion spring 105, thereby the roller 106 presses the connecting line of the electronic component, further the connecting line of the electronic component is limited, then the connecting line of the electronic component is pulled to be pulled out outwards through the lower part of the rear side of the support frame 1, when people need to take out the electronic component, the roller 106 is pulled to rotate, thereby the movable rod 104 is driven to rotate, the roller 106 is made to loosen the connecting line of the electronic component, then the connecting line of the electronic component is pulled out from the gap between the roller 106 and the baffle 101, then the roller 106 is loosened, the second torsion spring 105 is restored, the second torsion spring 105 drives the movable rod 104 and the roller 106 to rotate reversely to reset, and then the connecting line of the electronic component is pulled out from the baffle 101, then, the connecting wire of the electronic component is pulled up, the connecting wire of the electronic component is pushed by the buckle 95 to move outwards, the third spring 96 is compressed, the buckle 95 loosens the connecting wire of the electronic component, when the connecting wire of the electronic component is separated from the buckle 95, the third spring 96 restores to the original state, the third spring 96 drives the buckle 95 to move inwards and return, the fifth movable plate 92 is pulled to rotate, the fifth movable plate 92 loosens the connecting wire of the electronic component, then people can take out the electronic component, the fifth movable plate 92 is loosened, the first torsion spring 93 restores to the original state, and the first torsion spring 93 drives the fifth movable plate 92 to rotate reversely and return.
The pressing mechanism 11 further comprises a pressing mechanism 11, the pressing mechanism 11 comprises third limiting columns 111, first movable frames 112 and fourth springs 113, as shown in fig. 4 and 14, the two third limiting columns 111 are welded on the left and right sides of the lower portion of the front side inside the supporting frame 1, the first movable frame 112 is arranged between the two left third limiting columns 111 in a sliding mode, the first movable frame 112 is arranged between the two right third limiting columns 111 in a sliding mode, the front sides of the two first movable frames 112 penetrate through the supporting frame 1 to be in contact with the second movable plate 82, the two fourth springs 113 are connected between the two first movable frames 112 and the supporting frame 1, the two left fourth springs 113 are wound on the two left third limiting columns 111 respectively, and the two right fourth springs 113 are wound on the two right third limiting columns 111 respectively.
The multifunctional heat dissipation type cabinet is characterized by further comprising a detection mechanism 12, wherein the detection mechanism 12 comprises fourth limiting columns 121, second movable frames 122, a lamp panel 123, fifth springs 124 and an electric power connector 125, as shown in fig. 4, 15 and 16, the left and right sides of the front portion of the lower side inside the support frame 1 are connected with the two fourth limiting columns 121, the second movable frame 122 is arranged between the two fourth limiting columns 121 on the left side in a sliding manner, the second movable frame 122 is also arranged between the two fourth limiting columns 121 on the right side in a sliding manner, the lower portions of the second movable frames 122 on the left and right sides are respectively contacted with the first movable frames 112 on the left and right sides, the lamp panel 123 is bolted to the middle portions of the upper sides of the two second movable frames 122, whether electric leakage occurs in the multifunctional heat dissipation type cabinet can be detected through the state of the lamp panel 123, the fifth springs 124 are respectively connected between the front and rear sides of the tops of the two second movable frames 122 and the support frame 1, and the four fifth springs 124 are wound on the adjacent fourth limiting columns 121, the power relay 125 is bolted to the front sides of the lower portions of the left side and the right side of the inside of the support frame 1, and the power connection position of the lamp panel 123 contacts the power connection position of the power relay 125 when moving downwards.
In an initial state, since the second movable plate 82 blocks the first movable frame 112, the fourth spring 113 is an extension spring, since the first movable frame 112 abuts against the second movable frame 122, the fifth spring 124 is a compression spring, when the second movable plate 82 rotates to open, the second movable frame 82 separates from the first movable frame 112, at this time, the fourth spring 113 returns to its original state, the fourth spring 113 drives the first movable frame 112 to move forward, when the first movable frame 112 separates from the second movable frame 122, the fifth spring 124 returns to its original state, the fifth spring 124 drives the second movable frame 122 and the lamp panel 123 to move downward, when the power connection point of the lamp panel 123 contacts the power connection point of the power supply 125, if the multifunctional heat dissipation type cabinet leaks electricity, the multifunctional heat dissipation type cabinet will flow current into the lamp panel 123 through the power supply 125, so that the lamp panel 123 lights up, and then people can light up the lamp panel 123 to know that the multifunctional heat dissipation type cabinet leaks electricity, thereby prevent that people from taking place the electric shock, if this multi-functional heat dissipation type rack does not take place when the electric leakage, lamp plate 123 then can not light, when second fly leaf 82 reversal is closed, second fly leaf 82 can contact with first adjustable shelf 112, second fly leaf 82 can extrude first adjustable shelf 112 to remove backward and reset this moment, fourth spring 113 is tensile, when first adjustable shelf 112 contacts with second adjustable shelf 122, first adjustable shelf 112 extrudes second adjustable shelf 122 and moves upward and resets, fifth spring 124 compresses, thereby drive lamp plate 123 and move upward and reset, make the electricity connection department of lamp plate 123 and the electricity connection department separation of continuing electrical apparatus 125 can.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention.