US1801206A

US1801206A - Supporting device

Info

Publication number: US1801206A
Application number: US71292A
Authority: US
Inventors: George T Mott
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-11-25
Filing date: 1925-11-25
Publication date: 1931-04-14
Anticipated expiration: 1948-04-14

Description

my. 11 Avvoo u l. MU|| l uul fivu SUPPORTING DEVICE Filed Nov. 25, 1925 3 Sheets-Sheet l INVENTOR ATTORNEY U- l. MUII Pill 51, Jul.

SUPPORTING DEVICE Filed Nov. 25, 1925 l 5 Sheets-Sheet 2 ATTORNEY INVENTOR npru 1-2, 1301. MQTT 1 1,001,!10

' SUPPORTING DEVICE Filed Nov. 25, 1925 5 Sheets-Sheet 3 Tia Q QMM ATTORNEY Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE GEORGE T. NOTE, PEARL RIVER, YORK surroa'rme DEVICE Application filed November 25, 1925. Serial No. 71,292

Theinvention relates to mechanical 'movethat is the power arm and theloadarm, in ments and is particularly applicable jtosuptheir relation to the eccentric members.

porting devices, such as supporting devices Another object of the invention is to profor pipes, coils, radiators, cables, and the vide a mechanical movement which may be i lik included in a compact devicefand yet be ca- 55 An object of the invention isto provide in pable of a comparatively wide range of operaa mechanical su port parts so arran ed and tion. combined that t iie supporting mem er will A further object of the invention is to proat the point of support operate through an vide a supporting device which, while being absolutely horizontal plane althou h said capable of carrying a load will also rmit co member, which initially is vertically lsposed, a reciprocating movement of the load on a may in its operation diverge widel from given straight line without harmful effects to said original, vertical disposition. he maeither the supporting device or the load carjor member, to which the load is ultimately ried thereby and which further will tend to I 16 transferred throu h said supporting memreduce the live load eflect of the supporting e5 her, is so arrange asito divide the load bemember. Other objects of the invention are tween two curved or'ecoentric elements formto provide a supporting device of this charing part of said major member. The load or acter which shall be simple in construction weight is distributed to the curved'or eccenand operation and of high efiiciency. These 20 tric elements equally, when the supporting and other objects of the invention will be 70 member is at rest or in normal neutral or vermore fully set forth in the following descriptical position, through two su porting memtion. bers or arms connected to t e supporting In the accompanying drawings, which are member or into which the latter may be direferred to herein and form part hereof, are I vided, these supporting arms forming conseveral diagrams setting forth certain princi- 75 tacts with the said eccentric elements. When ples of the invention, and there are illuspower application tends to disturb the nor trated several embodiments of the invention mally vertical and initial position of the supas applied to supporting devices. porting member, there is a "natural tendency Of the drawings:

to throw an ever increasin percentage of the Fig. 1 is a front view of a supporting deso load or wei ht onto one o the said supportvice constructed in accordance with certain ing arms. he combination of the respecprinciples of the invention and particularly tive parts of the supporting device is such devised for supporting radiators, piping or 't that, when action "be 'ns, whether in either other equipment from walls or vertical surdirection, right .,or 1e t, the supporting arm, faces; 5 on which the increased load is thrown and on Flg. 2 is aside view of the same, parts bewhich the gradual augmentation of load'ocing broken away, and shows means for vercurs, is on the decline of the given eccentric. tically ad usting the supportin device; Further, said combination'is such that, should Fig. 3 is a top plan view of the device illus- 40 the action or movement of the initial support trated in Fig. 1, parts being omitted; be so great as to carry it out of the vertical Fig. 4 is a diagram showing the plotting so far that the supporting arm has reached a of the curves of the operative faces of the contaot point at the lower point of support sustainin element-shown in Fig. 1; in the eccentric, then the supporting mem- Fig. 5 1s a front view of a supporting de- 45 her will have a leverage outsi e of the cenvice'for carrying pipes, cables, driving rods,-

ter line of said supporting member in its inibridges or other equipment requiring subtial or vertical positioxnand in addition the stantial support through a range of action; supporting member will have risen and al- Fig. 6 is a side view of the same; tered the ratio of leverage between the two Fig. 7 is a front view of a supporting de- 50 effective elements of the supporting member, vice for carrying loads in general, the same being a modification of the device shown in Fi s. 1 and 5; i

Fig. 8 is a side view of part of the construction shown in Fig. 7;

Fig. 9 is a plan view taken on the line 9 of Fig. 7 and looking in the direction of the arrows;

Fig. 10 is a view generally similar to Fig.

7, parts being broken away, but showing the 10:31 carrying parts in different positions; an

Fig. 11 is a diagrammatic view, in reverse to Fig. 4, and shows the plotting of the curves of the operative faces of the sustaining element shown in Fig. 7

Referring now to the drawin s in detail, and first to Figs. 1, 2, 3 and 4, t ere is illustrated therein a supporting device construct ed in accordance with certain features of the invention, for carryin radiators, as on a wall. Considerable di culty is experi;

enced in supporting radiators on walls because of the very considerable pressure exerted by'expansive or contracting action, the I effect of these powers bein exerted in a direction incident to the point of anchorage. The result of these forces will be to distort the radiator from the levels or grades originally established when uninfluencedby ex-, panslve or similar action, thus causing heavy strain which may cause leaks or fracture. There is a further necessity for supporting insulated ipin on hangers which will permit the integrity of the insulation to remain intact through the life of theplant.

Means are provided, therefore, for sup porting the piping, which means will permit forward movement of the piping without strain on the latter due to thenature of the supporting means and without injury.

to the said supporting means. In the embodiment of the invention illustrated in the drawin this means com rises a lever so constructe and arranged t at one end thereof can move in a curved line while the other end, which supports the piping, will at the same time move in a straight line, as'in a true horizontal plane. As shown in Figs. 1, 2 and 3, said means comprise a frame member 13 of suitable length and width, see Fi 1, and having at its upper and lower en s inwardly turned

portions

14, 15, respectively. By means of these portions, the bod} 13 of said member is spaced a artfrom the wall 17 to which it is fastene as by

bolts

18, 19 extending through orifices in

flanges

21, 22 which flanges are formed at right angles to said

curved members

14, 15, respectively. The body portion of said member 13 is formed with a longitudinal slot 23 therein for a urpose which will presently be described? said slot having at its lower end a uadrangular enlargement 24. A screwt readed bo1t'26 is arranged longitudinally between the member 13 and the wall 17, ex-

an annular member 38 in which is tending through the member 14 to which it is secured by a nut 27.

Arranged in front of said member 13 and in close proximity thereto is a lever 31, having a widened body portion 32 formed with a longitudinal slot 34 therein having a circular enlargement 36 at its lower end. Said body portion 32 is formed at its inner edges about the slot with a depressed portion 37. The lever 31 terminates at its upper art in tted a bearing member 39, having a stub 41 closely engaging the inner. surface of said annular member 38 and being of less diameter than the adjacent edge 42 of said member 39. At its end opposite said edge 42 said stub 41 is held in place .in the annular member 38 by a disk 43 of greater diameter than said stub 41 and held in contact with the face of the member 38 by a nut 44, screwed on an extended threaded portion integral with said stub and projecting therefrom, all as clearly shown in Fig. 2. At its opposite end said member 39 is formed with aprojecting bar terminating in a screw-threaded pin 45.

Preferabl and as shown, see Fig. 1, the lever 31 is ormed at its lower end with laterally diverging arms or bearing

members

49, 50, bifurcatedat their respective ends and

providedwith rollers

52, 53 mounted on said ends, as by means of

pins

54, 55.

A fixed sustaining element 56 is arranged in close proximity to the face of the frame member 13, being held in place by a lug 57 extending through the slot 23 in said member 13, which lug is bored and internally threaded to engage the rod 26. Said sustaining element 56 is also provided with

side flanges

58 and 59 engaging the sides of the frame member 13 and further securing thev sustaining element in place and against lat eral movement. Said cam is formed with laterally and upwardly extending

wings

61, 62 having inner oppositely disposed

operative faces

63, 64 preferably and as shown equally curved from a common center 66 from which they descend and then rise as shown in Fig. 1 each of the

faces

63, 64, as shown, having thus associated with it a su plementary oppositely inclined face. n these

faces

63, 64 the lever 31 is supported and oscillates by means of the

rollers

52, 53 in a manner presently to be described.

The radiator sections are hung upon the bearing members 39, being vertically disposed with relation thereto, as indicated by the dotted lines in Fig. 3, the ends of-the sections being, joined in the conventional manner, not shown, and the sectlons resting upon the bearing members. It will be ob served that the load will be finally distributed through the

arms

49, 50 of the lever 31 equally upon the sustaining element faces 63, 64. the lever 31 being normally centrally and vertically disposed upon the sustaining element '56, the points of contact of the

rollers

52, 53 upon the

faces

63, 64 of the sustaining element being equidistant from the central point 66. When the radiator, piping or other supported unit under positive action or that of contraction or expansion moves laterally as in the direction of the arrows in Fig. 1, there will be a stress exerted upon the support, and subsequently the supported unit, because of theengagement of the p1ping to the bearin member of the su porting device, and if these supporting ences were immovable or of a type which would swing from a fixed center and thus disturb the alignment or were ofa type similar to that of a roller with a small radius, the stress incident thereto would result in distortion and probable leaks and would further result in the destruction of the insulation, should the supported unit be provided with any. By mountin the lever 31 with-a rolling contact upon t e operative facesof the fixed sustaining element, as shown in Fig. 1, how- I ever, the upper end of the lever .31 with the sup orting members 39, is enabledto move wit the piping and in a true i horizontal plane; For, see Fig. 1, as the upper end of the lever moves to the right, the 'load on the arm 50 and roller 53 will be instantly increased, with a compensating diminution of the load on the arm 49 and roller 52. The roller 53 will descend but in a gradual manner due to the nature of the curve of the face 64, the descent being further safeguarded and checked because of the ascent on the curved face 63 of the arm 49 and roller 52. Because of the equality of the

curves

63 and 64, the ascent of the roller 52 will correspond exactly to the descent of the roller 53. As the expansive pressure or positive action subsides, it will be seen that there will be a movement of the lever 31 in the reverse direction.

Means are provided for guiding and limit ing the lateral movement of the lever .31, said means, as shown, see Figs. 1 and 2, comprising a pin 67 fastened by means of a bored and internally threaded lug 68 to the threaded rod 26 and projecting through the slot 23 in the frame member 13 and the slot 34 in the body portion 32 of the lever 31. Said pin 67 is provided at its outer end with a circular flange 69 engaging the face of said body ment are shown. For example, when the top of the lever, as shown by the circle 71 has been moved to the right to the point 72, the rollers will have moved from the positions shown in Fig. 4 to positions indicated by the respective curves immediately to the left, and so on. And it is to be noted that without any deformation ofthe lever or change in its length while its lower ends have been moving in curved paths, its upper end has been traversing atrue horizontal plane. The method of determining the lines of the bearing ele ment employed in the preferred form is clearly indicated in Fig. 4. The impinging point between the load carrying element 31 and the a load is in this instance at 71, Fig. 4, wherein said point 71 is made to describe a straight line in the direction of 71 to 72 or the reverse 'and in accord with the functions of the device. At one end of the lever 31, Fig. 4, is indicated the forked part including the respective points of support of the bearing element referred to. At point 67, Fig. 4, is provided a pivot constantly in a plane parallel with the direction of impulse. The lever 31 is suitably slotted to engage this pin 67 and slide upon it, thus permitting the compensation necessary in the action of the impinging point 71 of the lever 31 in following the straight line 71 toward 72 or the reverse. The lower point of the lever 31 is further provided with a forked element, the length of each fork and the distance apart of the forks being dependent on the required length of travel at 71 toward 72, or reverse, as is also a the distance of the pin 67 from the point 71 and from the extremities of the forks. It will be observed, see Fig. 1, that these forked extremities are indicated therein at the contact points in the preferred form of the

rolls

52 and 53 with the sustaining

elements

63 and 64.

It will be observed that in the event of the load traveling in the direction indicated by the arrow, Fig. 1, or from 71 toward 72 or the reverse, Fig. 4, there will be a natural tendency to throw the applied effort on the lever 31, Fig. 1, to the fork 50, and that the effective effort thus applied at that point is on the decline of the sustaining element 62, Fig. 1, until the valley is reached at a point approximating 64, Fig. 1. Continued action in the direction of the arrow 2, Fig. 1, or the line 7172, Fig. 4, will result in the device exceeding its established cycle of operation and climbing the respective sides indicated at the left of the two sustaining elements shown in their preferential form at 61 and 62, Fig. 1. To effect this without destroying thev device and with comparative ease, the ratio of leverage length included between the pin 67 and the impinging point 71, Fig. 4, and the corresponding effective length of leverage between the pin 67 and the

rolls

52 and 53, Fig. 1, is materially altered," as is indicated in the relative distance between the pin 67 and the impinging point 71, when in the central or normal position as shown, compared with the length of this lever when extended in'travel through the length of opera-' tion from, say, 71 toward 72, or the reverse and asindicated by the distance between 67 and-72, Fig. 4. It will be observed that inasmuch as the compensation is effected through the using of the lever 31, Fig. 1 or Fig- 4, in relation to the pin .67, there is a consequent'diminution of the leverage length in the forked element, thus increasing the power application in the moving load as described.

It will be noted that the device can be ad-: justed vertically to permit varying heights of the radiators by adjusting the pin 67 and sustaining element 56 on the rod 26, which adjustment is done simultaneously through turning in the proper direction the rod 26.

A niodification of the invention is shown in Figs. 5 and '6, wherein is illustrated a sup porting device used for carrying pipes under the influence of contraction or expansion or that of applied power. It is a common practice in plants usin steam power to generate the steam in one building and convey it to other buildings of the plant through pipes housed in conduits. The same difliculty is experienced in suspending the pipes in the conduits as has been described with reference to the supporting of radiators or coils on walls because of the very considerable pressure exerted by the expansive or power element in the direction of the length of the pipes and the necessity for flexibility in the supports for the pipes. In this modification of the invention, as shown, see Fig. '5, there is provided a base 74 securely anchored by bolts 76 to the floor of the conduit. Rising from said base is a framework comprising front and

rear plates

13, 13" having projecting lugs 77 bored and retaining four screw-threadedrods 78. Above the said top lugs are bolt heads 82. Said

plates

13 and 13 are formed with depressed portions 32 extending longitudinally throughout the upper portionsof said plates, the undepressed portions forming edges 37 about said depressed portions. Said depressed portions are formed with longitudinal slots 34 therein. A sustaining element 56, in the main similar to the sustaining element 56 heretotore described, is arranged between the

plates

13 and 13 and is secured to the rods 78 by bored and internally threaded lugs 57*. A lever 31 generally similar to the lever '31 is arranged between said

plates

13 and 13 to oscillate upon the operative faces of said sustaining element 56. The pin 67, however, which guides and limits the lever 31* in" its movement is in this embodiment of the invention formed on one end with a slotted head member, the bottom of which is provided with teeth 67 arranged to engage similar teeth 67 on the depressed face 32 of the plate 13 and thus hold said pin in proper position; said pin, which extends thru the slots 34 in the

plates

13 and 13 being'screw threaded on its opposite end, on which end is screwed a nut, which is shown in dotted lines and a full line in Fig. 5, and which nut closely engages the depressed portion 32 of the plate 13". Atits upper end the lever 31 is formed with outwardly curving arms 83 within which is arranged a semi-circular cradle 84 swinging on pins 86 extending through slots 87 in the rounded ends of the arms 83, as shown in Figs. 5 and 6. In this cradle 84 rests the pipe 88, as indicated in dotted lines in Fig. 6. It is to be noted that the sustaining element 56 may be raised or lowered on the rods 78 as desired, and the position of the pipe 88 changed accordingly. The operation of the device is similar to that of the support hertofore described and shown in Figs. 1, 2 and 3.

' In Figs. 7 to 10, inclusive, is shown another modification of the invention, in which the arrangement of the lever is the reverse of that shown in the preceding modifications. This modification is capable of application to a variety of uses and may be used for carrying pipes, subject to expansion or contraction as is the modification shown in Figs. 5 and 6, the pipe in this instance being represented by the weight marked W in Fig. 7. An I-beam 90 or other support is used at the upper part of the conduit or the structural beam in any construction ma be used and a plate 91 is clamped thereto y clamping screws 92, passing through slots 93 which are extended longitudinall to permit adjustment to varying sizes of I- eams, all as clearly shown in Fig. 7 Depending from the under side ofthe plate 91 and formed integrally therewith are annular lugs 94, one at each corner of said plate which are interiorly and laterally recessed, see Figs. 7, 8 and 9, to receive the heads 96 of bolts 97, the lateral recesses in the lugs on one side of the plate extending in a direction opposite to that taken by the lateral recesses in the lugs on the opposite side, thus preventing any possibility of the bolts 97 slipping from their positions. At their lower ends said bolts 97 are fastened to a sustaining element 98, having

wings

99, 100 by means of bored and threaded lugs 101, two of said lugs being on each side of said sustaining element and, as shown, on the wing portion thereof. Said sustaining element is formed with a slot 102 extending throughout the greater portion of its length, see the dotted lines in Figs. 7 and 10, in which slot is arranged normally in vertical position a lever 103, having at its upper end a transverse arm 104. terminating 'in bifurcated ends in which are arrange rollers 52",'-53 by means of pins 54" and 55". The load in this embodiment of the invention instead of beinglaptplied at the top of the lever is applied at t e ottom of the lever. The

curves

63 and 64" of the operative faces of the sustaining element 98 are therefore convex instead of, concave but the reciprocating laterally in a horizontal plane of the lower end of the lever 1.03, while the rollers 52", 53 move up a'nd'down on their respective faces, is the same as in the modifications of the invention heretofore described. The various degrees of movement of the lower end of the lever in the horizontal plane and the corresponding moves in curves of the rollers are diagrammatically shown in Fig. 11, a movement to the right from point 106 to point 107 by the end of the lever being accompanied by a movement of one roller from point 108 to point 109 and by a movement of the other roller from point 111 to point 112. The diagram Fig. 11 is described in substantially the same manner as that of Fig. 4. In this type of support the load is suspended beneath the load carrying element, and the supporting lever 103, Fig. 10, is not continued eyond the forked element.

4 indicated two distinct acts of weight transfer due to the shifting of the center of gravity and involving a complete cycle of operation of the thus freely swung member, with the incident variation of leverage ratio included. Thus, further, as in Fig. 10, the effective leverage is through what is in efiect a three 7 point suspension member; and when in action, the leverage shifts from the contactpoint of one arm to that of the other, according to the direction of motion; and the load impulse or effective effort is thus always converted to a downward direction. This effective effort may be defined as the energy exerted in moving and in effect upsetting the load plus the momentary preponderance of load thus imposed at any given point.

In Figs. 7, 10 is clearly shown the shifting of the center of gravity by which ease of operation and elimination of strain on the unit or its anchorage is eliminated. For instance, in Fig. 7 it is clearly shown that the load or Weight W has its weight evenly distributed and that the center of gravity, when inactive, is through the center of the device on the lever 103. In Fig. 10 the center of gravity, when inactive, is shown to have shifted, according to the degree of operation of the device, to a line closely approximating a vertical, drawn through the center of the orifice at the lower end of 103 and the pin on which the roller 53 operates; while in action, however, it will be observed that the load is thrown on the wing of the support following the direction of travel, this by reason of the upsetting efiect of the three-point support. At the same time the dead weight will tend to preserve the unit in equilibrium.

' It will be seen that a mechanical movement constructed in accordance with the principles of the invention will be capable of application out departing from the main principles of I the invention or sacrificing its chief advantages.

I claim:

1. A mechanical movement including in combination, a sustaining element having a pair of curved operative faces oppositely disposed, a lever normally per ndicularly arranged with relation to sai sustaining element, and means connected with two opposite sides of said lever and movably hearing upon said sustaining element faces, whereby said lev'er may be moved laterally with its end remote from said connectin and bearing means moving in a line parallel to a given straight line. i

2. A mechanical movement including in combination, a sustainin element having a pair of curved operative aces oppositely disposed, a lever normally vertically arranged with relation to said sustaining element, and means connected with two opposite sides of said lever and movably bearing upon said sustaining element faces, whereby said lever may be moved laterally with its end remote from said connecting and bearing means moving in a line parallel to a horizontal line.

3. A mechanical movement includin in combination, a relatively fixed element aving a pair of curved operative faces opposite- 1y disposed, a lever movable with relation to said element and normally vertically disposed with relation thereto, a pair of members arranged-on the opposite sides of said element, and means affording a slidin or rolling contact between said pair of mem rs and said element.

4. A supporting device including in combination, a sustaining element having curved operative faces oppositely disposed, means for supporting said sustaining element, a lever normally vertically disposed with relation to said sustaining element and arranged at one portion to engage a load, and bearing members connected to another portion of said lever and adapted movably to engage said faces, whereby said lever may be moved laterally with its load bearing portion moving in a line parallel to the horizontal.

5. A supporting device including in combination, a sustaining element havin curved operative faces oppositely dispose means for supporting said sustaining element, a

supporting element having portions movably engaging. opposite operative faces of said may be moved laterally with its load bearing portion moving in a line parallel to a given straight line.

I and extending through both said slots for,

' 6. A supporting device including in combination, a frame, a sustaining element arranged on said frame and having oppositely curved operative faces, and a'lever normally vertically disposed with relation to said sustaining element and arranged to oscillate thereon, said lever being arranged at one end to carry a load and at the other end having arms adapted to move on said sustaining element faces, whereby in the oscillation of said lever said arms will describe the curves of said sustaining element faces while the loadc'arrying end of saidlever will move in a straight line.

7. A supporting device including in combination, a frame member formed with a 101igitudinal slot therethrough, a sustaining element with curved operative faces secured to said frame, a lever with arms at one end arranged to oscillate on said sustaining element faces, said lever being formed with a longitudinal slot therethrough, and a member secured to said frame and extending through both said slots for guiding and limiting the movement of said lever.

8. A supporting device including in combination, a frame member formed with a longitudinal slot therethrough, a sustaining ele-,

ment with curved operative faces adjustably secured to said frame, a lever with arms at one end arranged to oscillate on said sustaining element faces, said lever being formed with a longitudinal, slot therethrough, and a member adjustably secured to said frame guiding and limiting the movement of said lever.

'9. A supporting device including in combination, an anchored frame, a sustaining element with curved operative faces'secured to said, frame, a lever with arms at one end arranged to oscillate on said sustaining element faces, said, lever being formed with a longitudinal slot therethrough, and a me m ber secured to said frame and extending through said slot for guiding and limitingthe movement of said lever.- 7

' 10. A supporting device including in combination, a sustaining element having oppositely vcurved operative faces,- and a lever normallyvertically disposed with relation to saidsus't-aining element and arranged to oseillate thereon, said lever being arranged at one end to carry a load and at the other end having arms adapted to move on the respective sustaining element faces, wherebyin the oscillation of said lever said arms will de scribe the curves of said sustaining element faces while the load-carrying end of said lever will move in a horizontal plane, the horizontal movement causing a rising movement of the arm on the sustaining element face inthe opposite direction and thereby increasing'the ratio which the length of the power arm of said lever bears to the entire length of said lever.

11. A supportingdevice including in combination, a sustaining element having oppositely curved operative faces, and a lever normally vertically disposed with relation to said sustaining element and arranged to oscillate thereon,'said lever being arranged at one end to carry a load and at the other end having arms adaptedto move on the respective sustaining element faces, whereby in the oscillation of said lever said arms will describe the curves of said sustaining element faces while the load-carrying end of said lever will move in a horizontal plane, the increased leverage required for the ascending movement of the arms on the sustaining element faces being provided by the horizontal movement of the load-carrying end of the lever and being proportional thereto.

12. A mechanical movement including in combination, a relatively fixed element having a pair of inclined operative faces oppositely disposed, an oscillatory lever cooperating with said element and normally vertically disposed with relation thereto, a pair of members arranged on the opposite sides of said element, and means affording asliding or rolling contact between said pair of memably to bear upon, said faces, the opposite end of said lever element being arranged to have weight-power applied thereto, and said faces and lever element being supported on said supporting structure, said lever element being arrangedvto oscillate so that while said opposite end of said leverfelement is moving in a straightline, the other end of said lever element at the point of immediate preponderant'imposed weight-power will be given a downward direction.

14..'A mechanical movement including in combination, a supporting structure, a pair of oppositely disposed inclined faces, a lever element normally perpendicularly arranged with relation to said faces, means connected with two opposite sides of said lever element at one end and arranged movably to bearupon said faces, the opposite end of said leve'r element being arranged to have weight-power applied thereto, and said faces and lever element being supported on said supporting structure, said lever element being faces associated one with each of said firstand supplementary faces associated one with named faces and oppositely inclined thereto, on one of which supplementary faces said 1 last-named part will move upwardly when the device, having completed its normal limit of action in said downward movement, is operated in excess thereof.

15. A supporting device including in combination a frame, a sustaining element arranged on said frame and having oppositely inclined operative faces, a lever normally perpendicularly disposed with relation to said sustaining element and arranged to oscillate thereon, said lever being arranged at one end to carry a load and at the other end having arms adapted to move on said faces,

each of said first-named faces and oppositely inclined thereto, on one of which supplementary faces one of said arms will move upwardly when the device is operated in excess of its normal limit of action.

16. A supporting device including in combination, a frame, a sustaining element adjustably arranged on said frame and having oppositely curved operative faces, and a lever normally vertically disposed with relation to said sustaining element and arranged to oscillate thereon, said lever being arranged at one end to carry a load and at the other end having arms adapted to move on said sustainmove on said sustaining element faces, whereby in the oscillation of said lever said arms will describe the curves of said sustainin element faces while the load-carrying end 0 said lever will move in a strai ht line.

i 18. A supporting device incl uding in combination, a frame, a sustaining element arranged on said frame and having oppositely curved operative faces, said element being formed with a slot extending throughout the greater part of its length, and a lever normally perpendicularly disposed in said slot and arranged to oscillate therein, said lever being arranged at one end to carry a load and at the otherend having arms adapted to move on said sustaining element faces, whereby in the oscillation of said lever said arms will describe the curves of said sustainin element faces while the load-carrying end of said lever will move in a straight line.

19. A supporting device includin in combination, a pair of bearings to sustain a load anoscillatin lever having parts arranged movably to ar upon said bearings and a portion adapted to have weight-power ap plied thereto, said lever being so arranged 1n relation to said bearings that during its entire actual movement of oscillation the immediate preponderant weight-power will be imposed upon one of said parts of the lever bearing upon said bearings, which said part will move in a downward-direction, while the other said portion of the lever will move in a straight line.

20. A mechanical movement includin in combination, a relatively fixed element aving a pair of inclined operative faces oppositely disposed, an oscillatory lever cooperating with said element and normally vertically disposed with relation thereto, a pair of members associated with said lever and arranged on the o posits sides of said element, and means'aifor ing a sliding or rolling contact between said bearing members and said element.

In testimony whereof, I have aflixed my signature hereto.

' GEORGE T. MOTT.