US2770467A - Vertically adjustable table - Google Patents

Description

11x1 13, 1956 J. E. MowRY 3 9 VERTICALLY ADJUSTABLE TABLE Filed June 6, 1955 IN V EN TOR.

J0/1/v EARL Mon RY ATTORNEYS Unite rates Patent VERTICALLY ADJUSTABLE TABLE John Earl Mowry, Denver, Colo. Application June 6, 1955, Serial No. 513,542

1 Claim. (Cl. 280-44) This invention relates to improvements in vertically adjustable wheeled tables and has reference in particular to a table for use in transportating television sets and during the loading or unloadings of such sets onto and/ or from trucks but is also suitable for other uses.

This invention will be described in connection with its principal use in the transportation and handling of television sets, which is not intended to limit its use in any way.

Television sets, especially the console type, are heavy and awkward to handle, they also contain many different tubes that are susceptible of breakage. Such sets are sold by all kinds of dealers many of which do not have loading platforms of heights corresponding to the height of the truck body and the sets must, therefore, be lifted bodily from the floor level onto the floor of the truck during the loading operation and manually lowered dun ing the unloading. During the loading and unloading operation there is a constant danger that the set may be accidentally dropped and damaged.

It is the object of this invention to produce a wheeled cart or table of such construction that the table top can be raised and lowered to bring an article supported there on to any desired elevation.

A further object is to produce a device of the class above identified of such design and construction that it can be made from light weight material such as aluminum or some alloy thereof and in which the structural mem bers employed shall have conventional cross sections such as angles, channels, round or square tubes, etc.

A still further object is to produce a device of the class pointed out having a deformable frame that resembles a lazy tong but differs therefrom in important details which will be pointed out as the description proceeds.

Having thus pointed out the most important objects of this invention and some of its uses, the preferred em bodiment of the invention will now be described in detail for which purpose reference will be had to the accompanying drawing in which the invention has been illustrated, and in which:

Figure 1 is a top plan view, looking downwardly in Figure 2, a portion of the table top has been broken away and removed to better disclose the construction;

Figure 2 is a side elevation, looking upwardly in Figure 1 and shows the table at an intermediate elevation;

Figure 3 is a view similar to Figure 2 but shows the table at approximately its lowest level;

Figure 4 is a section taken on line 4-4 Figure l; and,

Figure 5 is a section taken on line 55 Figure 1.

Referring now to the drawing, reference numeral 11 designates the side frame members which will also be referred to as the handles of which there are two. The handles have short upwardly convex sections that form hand grips, and are interconnected near their upper ends by a cross bar 12. An axle 13 joins the extreme lower ends and this carries rubber tired wheels 14. The table consists of a flat sheet 15 that forms the table top and ice this is secured alongits edges to angle beams 16 and 17 that extend rearwardly beyond the rear edge of the table and are attached to the handles by bolts 18 that serve as pivots. It will be noted that the angle beams 16 and 17 have their upper flange turned inwardly and somewhat shorter than the side flanges as shown most clearly in Figure 1. The front ends of the angle beams 16 and 17 are joined by an angle bar 19 and are further interconnected by a rod 20 which serves as a pivot for the upper ends of the front table legs 21 that are joined by angle bar 22. Links 23 have their lower ends pivotally attached to the side or handle members 11 by bolts 24 and their upper ends pivotally attached to the table legs 21 by bolts 25 that also serve to attach bar 22 to the table legs. The distance between pivots 20 and 25 is the same as the distance between pivots 24 and 25. A nut 26 is welded to bar 22, as shown in Figure 5. Cross bar 12 has an opening through which the rotatable crank shaft 27 projects as shown in Figure 4. Shaft 27 is provided at its upper end with a crank 28 and its lower end has a long threaded section 29. Collars 30 are attached to shaft 27 by pins or by welding or by any other suitable means, one on each side of cross bar 12, as shown in Figure 4, to prevent the shaft from moving longitudinally. Straps 31 having buckles 32 are attached to the sides of the table to cooperate with a web or strap passing over the television set or other object positioned on the table. The table top has a removable section 33.

As an example of one typical use the following is given. Let us assume that it is desired to move a television set from the floor of a store building and load in onto the floor of a truck body, as in the delivery of the set to a purchaser. The device is adjusted to the position shown in Figure 3 with the table top at its lowermost position; the set is then positioned on the table and strapped in place, if this is considered necessary. The table is now elevated to an intermediate position and wheeled to the truck, and there adjusted vertically until it is even with the bottom of the truck body after which the set is slid from the table onto the truck. When the set is to be unloaded the procedure is reversed. The above is an example of one use and it is to be understood that the invention is suitable for other uses such as shifting the set from one room to another.

What is claimed as new is:

A frame for supporting and vertically adjusting a table, comprising in combination, two table top supporting side frame members, means for holding said members in spaced parallel relation, 21 first pair of table legs pivotally connected with one end of the side frame assembly, a second pair of legs pivotally connected with the side frame assembly at the other end thereof, said second pair projecting upwardly beyond its pivotal connection forming handles, the legs of the first and second pairs of legs crossing beneath the table, the lower ends of said pairs of legs constituting supports means comprising upper and lower transverse bars for holding the legs of the second pair in a predetermined spaced relation, a link pivotally connected to each leg of said sec- 0nd pair at a point adjacent its lower end, the upper ends of the links being pivoted to the corresponding legs of the first pair at points spaced from their pivotal connections with the side frame members a distance substantially equal to the distance between the pivot points of said links, a spacer bar positioned between the legs of the first pair adjacent the point of link pivotation, the upper spacer bar connecting the second pair of legs being positioned adjacent the pivotal connections of the legs with the side frame members, and means comprising a crank shaft journaled in a bearing in the last mentioned transverse bar and having a threaded connection with the transverse bar spacing the first pair of legs adjacent the link pivotation, for changing the distance between the transverse spacer bars thereby effecting a vertical adjustment of the side frame members and the table top attached thereto.

References Cited in the file of this patent UNITED STATES PATENTS Belford Mar. 4, 1873 Atzert May 8, 1894 Garret Oct. 8, 1907 Doman Nov. 27, 1934 Gannett et a1. Mar. 20, 1951 Cadwell et a1. Ian. 6, 1953

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