US1214104A - Portable hoist. - Google Patents

Description

E. C. WINGIRE.

PORTABLE HOIST.

APPLICATION FILED JUNE 21.1915.

Patepted Jan. 30, 1917.

Jazz/anion- .v aim? 1771.652 6" Wdngtzve ear ai men- ERNEST C. WINGIRE, OF IVIINN'EAPGLIS, MINNESOTA, ASSIGNOR 9F SHE-HALF T0 PETER J. N. MILLER, 01: MILLER, SOUTH DAKDTA.

PORTABLE I-IOIST.

Specification of Letters Patent.

Patented'J an. 30, 1917.

To all whom it may concern:

Be it known that I, ERNEST C. WINGIRE, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented a new and usful Improvement in Portable Hoist-s, of which the following is a specification.

My invention relates to improvements in sortable hoists, and has for its primary obj ect the production of a simple and inexpensive hoisting apparatus, which may be easily and quickly moved from place to place and heavy loads lifted or lowered into any position desired.

More particularly this invention provides a foldable supporting frame to which a winch is attached and its lifting cable most effectively applied for supporting heavy loads. The distribution of the parts of the mechanism is also so symmetrically arranged as to equalize any uneven lateral forces, thereby applying the power employed most effectively.

lVith these and other objects in view, which will be apparent from the following description, my invention comprises the features of construction and combination of parts hereinafter more particularly described and claimed.

In the accompanying drawings, forming part of this specification, Figure 1 is a side elevation of my invention; Fig. 2 is a detail illustrating the construction of the winch and its method of attachment to the supporting frame or tripod; Fig. 8 is a side elevation of part of the yoke portion of the hinge member at the top of the tripod; Fig. 4 is a section taken upon the line XX, Fig. 3, the shaft or pintle of the hinge member not illustrated in F ig. 3, being included in the structure.

In the drawings A indicates the frame or tripod which is constructed in the form illustrated with three leg members 2, 3 and 4, which are freely hinged together at their upper ends by a hinge B. The lower ends of the leg members 2 and 3 are pointed to engage the ground or supporting surface to prevent slipping, while the member 4 is provided with a bearing roller 5 to facilitate its movement. The lower ends of all of the legs may be provided with bearing rollers when desired to facilitate movement of the entire tripod for carrying the tripod and its load from place to place. The hinge consists of a fixture formed with a body or yoke 6 on both sides of which extend outwardly pairs of flanges 7 and 8. The upper end of the leg 2 is pivotally secured between the flanges 8 by the bolt 9, while the upper end of the leg 3 is secured between the pair of flanges 7 by the bolt 10, so that the legs 2 and 3 are adapted to fold together. Spanning the space between the sides of the yoke 6 is a shaft or pintle member 11 upon which is freely pivoted the bifurcations 12 formed on a coupling 13, which is rigidly secured to the upper end of the leg member 4. Journaled freely upon the shaft 11 between the bifurcations l2 and within the yoke is a sheave 14, over which the free end of a lifting cable 15 travels freely. The shaft 11 permits the leg member 4 to swing inwardly when the tripod is not in use. Thus all of the leg members may fold together. Chains or other connecting devices such as 16 may be fastened to the leg members to define the distance which they are adapted to spread apart.

Upon the lower portion of the leg member 4 and within convenient reach of an operator, a winch C is secured having a winding drum 17 to which the lifting cable 15 is secured. This winding drum is rigidly secured to a shaft 18, said shaft being journaled upon a supporting frame 19, which is clamped by a bolt 20 (see Fig. 2) on the leg member 4. The shaft 18 carries a spiral gear 21 and its ends are squared at 22 to permit of the ready attachment of a crank handle 23 for turning the shaft and the drum. Journaled upon the supporting frame 19 transversely of the shaft 18 is a drive shaft 24, which carries a worm pinion 25, the teeth of which are adapted to mesh with the teeth of the gear 21. The shaft 24 is slidable in the supporting frame, so that the pinion may be freely moved with its teeth into engagement with or out of engagement from the teeth of the gear 21 when desired. An end of the shaft 24 is also squared at 26, so' that the handle 23 may be applied to the shaft 24 for turning it when desired. Thus by disengaging the worm pinion from the spiral gear, the drum can be turned freely either directly by the handle 23 or by pulling upon the cable 15, whereas when the worm pinion 25 is engaged with the gear 21 a powerful effort can be applied by turning the shaft 24 to lift or 5 have described the principles of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction shown is only illustrative, and that the invention can be carried out by other. means and applied to uses other than those above set forth within the scope of the following claim. 7

Having described my invention, what I claim as new and desire to'protect by Letters Patent is:

The combination with a portable hoist h ving three posts provided with means for limiting their movement away from one another at the bottom, of a fixture comprising u a yoke having two pairs of outstanding- V flanges between each pair of which'the upper end of each of two of said posts is pivotpair of bifurcations journaled on said pintle to each side of said sheave, and lifting mechanism supported by said post.

In testimony whereof, I have signed my name to this specification.

EeNEsT o. WINGIRE.

' (101318101 this patent may be obtained for five cents each, by addressing the Gommis sioner of Patents, Washington, I). G.

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