US1751480A - Elevating mechanism - Google Patents

Description

March 25, 1930.

J. w. HOWELL 1,751,480 v ELEVATING MECHANISM Filed Ilargh 21-, 1928 ATTORNEY Patented Mar. 25, 1930 "UNITED STATES PATENT OFFICE) JAMES w. HOWELL, or CLEVELAND, onIo, ASSIGNOR TO THE wnrrn moron COMPANY, Y or cLEvELANn'onIo, A CORPORATION or omo ELEVATIN G MECHANISM.

Application filed March 21, 1928. Serial No. 263,308.

. vide an elevating mechanism of simple, dura ble and eflicient construction.

Other objects will hereinafter appear. The invention itself will be more readily understood from the description of one practical embodiment thereof, illustrated in the accompanying drawings in which:

Figure 1 is a plan view of a device embodymg the present invention, certain elements. being broken away in the interest of clarity. Figure 2 is a side elevational view of the structure illustrated in Figure 1.

Figure 3 is a perspective view, part1 in section,-illustrating one of a number of a ternative elements that may be used in conjunction with the, elevating mechanism shown in Figures 1 and 2, and. I Figure 4 is a perspective viewof a second alternative element adapted for use with the elevating mechanism. 4

' in the assembly of automotive vehicles such Y as automobiles andthe like, and is made 3 small enough to pass between the wheels and under the frame of such vehicles. It may be used, aswill'presently become apparent, both to carry the work (heavy parts of the vehicle such as a transmission) to the place of assembly and to elevate the same toa position for attachment.

Referring to the drawings in which like parts are designated by like reference numerals, the device comprises a base in'the form of a small truck or dolly. This base is rectangularin outline and consists of side members 1, end member 2 and wheels 3 journaled on cylindrical extension 4 formed on end members 2. Mounted at one end of the base and secured to'the side rails 1, there is a 'means of bolts 13 and 14 respectively, and

pair of vertically disposed gusset plates 5 upon which is rotatably mounteda pair of levers'or links .6 by means of bolts 7. Connecting the side rails 1, and extending .through both the side rails 1 and the gusset plates 5, is a tie rod 8 whose axis falls within the same vertical plane as the aXeS of the bolt '7. Rotatably mounted upon the tie rod 8 is .a pair of levers or links 9 spaced apart into loose contact with the plates 5 by means of a sleeve 10, which surrounds the intermediate portion ofthe tie rod 8.. The two' pairs of levers 66 and 99 are pivotally connected at their outer ends to a socket member; 12 by since the distance betweenboltsl7 and 13 is made equal to the distance between tie rod .8 and bolt 14, and the distance between bolt 7 and tie rod 8 is made equalto the distance between bolts 13 and 14, these levers form two sides of a parallelogram. The socket member 12forms a third side of the "parallelogram and when raised orlowered in a manner to be hereinafter described, remainsparallel to the fixed fourth side of the parallelogram which for the present purpose, maybe considere'd as a vertical line passing thflough the axesof the bolts 7 and the tie Above the bolts 7 and intermediatethe plates 5 there is a, pivotally' supported bar The device illustrated is designed for use.

orcross member 15. This bar, as illustrated, is provided with ,trunnions 16, adjacent its terminating ends which trunnions are journaled in aligned apertures in the upper portion of plates 5. *In the central portion of the bar 15 is a transversely disposed bore 17', which provides a mounting for a shaft 18, the shaft being longitudinally sustained therein by a head 19. Formed upon the free end of the shaft is a collar 20 which abuts the inner face, of the bar ,15 and which is secured in.-

lock-ingengagement to the shaft by a set screw 21. The rear end of the shaft 18 is screw threaded through an aperture 22 formed'in a transverse member 23 which extends between levers 9 and is connected thereto by trunnions 24 journaled in bearing apertures forming said levers.

To prevent distortion ofthe levers 6, particularly such distortion as would affect the between said oints and connecting the free free rotation ?of the transverse member 23, ends of the rst named hnksm the order the levers are provided with a tie rod 25 and of their attachment to said dolly, a fourth a spacer sleeve 26, which are preferably polink in the form of a screw pivotally attached sitioned adjacent the cross member 23. to and connecting said dolly and one of said 70 As will be readily seen, the longitudinal first named llIlkS, the polnt of attachment of member 18 forms an adjustablelink connectsaid fourth link to said dolly being a subing the fi'xed plates with the movable levers stantial distance above the platform of said 6, and when turned by means of an operatdolly, and an operating handle on sald fourth 1 ing handle 27 mounted in the enlarged head hnk ad] acent the aforesald point of attach- 7 19, effects angular movement of the levers ment. 6 and 9 about their respective fixed pivots, In testimony whereof I hereunto aflix my (bolts 7 and tie rod 8) which movement will slgnature thls 5th day of March, 1928. raise or lower the socket member 12, depend- JAMES W- HOWELL- ing upon the rotational direction in which the 80- member 18 is turned.

The socket member 12 is provided with an aperture 28 preferably rectangular in cross 7 section and-partially closed near its bottom l 20 end by a removable bolt 29, the side walls of which are formed parallel to the normally vertical fourth side of the parallelogram, hereinbefore described.

Referring now to Figures 3 and f which illustrate two of a number ,of tools that may be used in conjunction with the trucks elevating mechanism the tool illustrated in Figure 3 comprises a member of rectangular cross section adapted to be inserted with- 30 in the aperture 28, and a work supporting platform 31 rotatably mounted on the upper end of member 30 by means of a pin 32. The tool shown in Figure 4 has the form of a right, angle bell crank of rectangular cross o section, whose lower arm 33 is adapted to fit 10 within the aperture 28 and whose upper arm 34 is provided with an aperture 35adap'ted to receive means for attaching the work 7 thereto. 7 4.0 It is obvious from the foregoing description, that the platform 31 of the tool illustrated in Figure 3 and the upper arm 34 of the tool illustrated in Figure 4 will retain a horizontal position for any angular po- 4.! sition of the levers 66 and 9-9, and that no work placed in a stable position upon the platform 31 will retain its original angular relation to the horizontal during elevation or depression. no While 1 have described the illustrated embodiment of my invention in some particularity, obviously many variations and modifications thereof will readily occur to those skilled in the art to which it appertains, I go do not, therefore, limit myself to the precise 1 details shown and described, but claim as my invention all embodiments coming within the scope of the appended claim."

What I claim is: The combination with a dolly comprising a platform, of an elevating mechanism comprisin a pair of spaced links of equal length pivota y connected to said dolly at spaced oints, a third'link in the form of a tool no older having a length equal to the "distance I

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