US 2777660 A
Description (OCR text may contain errors)
'JUI- 15, 1957 H. P. ALBRECHT ADJUSTABLE sHoREs libimnlvmmNm Filed Nov. 27, 1955 United States Patenti@ 2,777,660 ADJUSTABLE 'sHoREs Henry P. Albrecht, Minneapolis, Minn.
ApplicationzNovmber 27,:1953,l-'Serial No. 394,574
Y N2 Claims. (Cll-t24821i54) My invention relates tol adjustable supporting devices and more particularly to adjustable shores for use in the building industry and for supporting overhead forms for concrete construction.
Such shores are interposed between a oor and the overhead supporting timbers supporting the forms for the immediately overlying ioor. Normally such shores include a pair of telescoping column sections which are locked together at a desired height by inserting pins through alignable longitudinally spaced openings therethrough, and an independent screw element. In positioning such shores between the floor and the overlying supporting beams, the column sections are lrst extended to the point where the openings in the outer section align with the closest opening in the inner section, and a pin is placed through said aligned openings. The ne or Vernier adiustment of the sections is taken care of through the medium of the screw element. lFrequently a considerable gap remains to be taken up by the screw element and this adjustment is obviously time-consuming and laborious. In fact in operations where large numbers of such shores are utilized, the time and labor involved in achieving such Vernier adjustments becomes a considerable expense factor.
The primary object of my invention is the provision of an adjustable shore which may be much more quickly and easily installed in operative position than any shore heretofore produced. To this end l provide novel means for quickly and effectively extending the shore to any operative height with a much greater degree of accuracy than heretofore possible, prior to rotating the screw element for the final or Vernier adjustments, whereby to reduce to a minimum the iinal adjustment to be achieved through the medium of said screw element.
A still further object of my invention is the provision of a device in the class described which has a minimum of working parts, is extremely easy to operate, which is fool-proof in construction and durable in use.
The above and still further objects of my invention will become apparent from the following detailed specification, appended claims and attached drawings.
Referring to the drawings wherein like characters indicate like parts through several views:
Fig. l is a view in front elevation of my novel structure;
Fig. 2 is a View in side elevation;
Fig. 3 is a fragmentary view partly in vertical axial section and partly in rear elevation as seen substantially from the line 3-3 of Fig. 2; and
Fig. 4 is a perspective view of the collar of my novel structure.
Referring with greater particularity to the drawings the numeral 1 indicates in its entirety a supporting column comprising a tubular lower section 2 and an upper section 3, shown as telescopically received in the open upper end portion of the section 2. Preferably and as shown, the lower section 2 is provided with an enlarged foot 4 for engagement with the ground or oor -A and "V' 2,777,660 vfliizateri'ted fJflnzfl551957 I the upper section 3 is provided at; its.,upper,.endwith an elongated -beamsupporting-saddle 5.2. yA-tubular-exvtension element 6 is shown as.N having sc-rewsthreadedenl extension-element 6, I' providelanffinverted'1U-shaped mounting bracket 8k on the` side of-thetubular-extension Aelement 'd between the sides of lwhich .is pivoted,thr0ugh the medium of a pivobpin 91a-handle-10.--;Handle 10 is obviously` swingable from, the --inoperative position shown, wherein it is .parallel tothe axis ofthe-,element 6, to a radially projecting'operative-positiomnot shown.
Overlying the extension element 6 for. independent rotary and axial sliding `movements-ion-saidflipper.Column section 3 is a collar 11,1which,-preferably and asshown in l-iig. 3, is provided with a reduced end portion` 12 freely `rotatively received within the socket-forming upper end portion 13 of the extension element 6.
As shown, the intermediate portion of the upper section 3 is provided with a plurality of longitudinally spaced diametrical openings 14 therethrough. `Openings 14 may be in vertical alignment, or as shown, may be both circumferentially or longitudinally spaced With respect to each other. The collar 11 is formed to provide a pair of diametrically opposed step-like members 15, each of which provides an arcuate supporting surface 16 for the selective reception of the opposite ends of a pin 17 inserted through a given opening 14 in the upper section 3. vPreferably and as shown, the pin 17 is connected at one end to a tie chain 18. The opposite end of chain 18 is in turn preferably connected to an ear 19 projecting laterally outwardly from the side of the collar 11 adjacent the lower end thereof.
Also preferably and as shown, the extension element 6, adjacent its upper end, is provided with a pair of opposed openings 20 which are likewise selectively registerable with the openings 14 and the upper section 3, for a purpose which will hereinafter become apparent.
When it is desired to place my novel shore in operation, the same is placed in a retracted position with the foot 4 on the floor -A immediately below a beam, not shown. The column 1 is then extended by telescopically raising the upper section 3 to cause the elongated saddle 5 to receive and engage the said beam. Next the collar 11 is rotated to cause alignment of the closest opening 14 in the upper section 3, with the closest arcuate seats 16 making up the opposed step-like members 15. Next the pin 17 is inserted through the opening 14 with the opposite ends thereof coming to rest in the aligned arcuate seats 16. Lastly, the effective length of the column 1 is arrived at by rotation of the screw threaded extension element 6, after handle 10 has been swung to its radially extended position. However, because of the aligned seats 16 on the opposed step-like members 15, the relatively slow and time-consuming rotation of the extension element 6 is reduced to a When it is desired to store or transport my novel shores, the pin 17 is inserted through the aligned openings 20 in the extension element 6, and any one of the longitudinally spaced openings 14 in upper section 3, and the several elements are thereby effectively tied together.
My invention has been thoroughly tested and found to be completely satisfactory for the accomplishment of the above objects and while l have shown a preferred embodiment thereof, as required by section 4888 of the Revised Statutes, I wish it to be understood that my invention is capable of modification without departure from the scope of the appended claims.
What l claim is:
l. An adjustable supporting column comprising a tubular lower section having the upper end thereof open, an upper section having a plurality of longitudinally spaced rotary and axial movement therewith on said upper section, operating means on said extension element for rotating same to provide Vernier axial adjustment of said upper section through said collar, said collar having pairs of diametrically opposed longitudinally spaced step-like portions each pair of which provide a supporting surface selectively supporting the ends of a pin inserted through a selected opening in said upper section providing an intermediate axial adjustment of said upper section between said initial and Vernier adjustments, aligned diametrical openings in said extension element algnable with a selected opening in the upper section for receiving means to secure the sections together for transportation or storage.
2. The structure defined in claim l wherein the independent rotary and axial movement of the collar with respect to the extension element is provided by a reduced end portion on said collar nestingly received within a socket defined in the portion of the extension element engaging the collar.
References Cited in the tile of this patent UNITED STATES PATENTS 2,468,484 Clark Apr. 26, 1949 2,532,168 Iakoubek Nov. 28, 1950y FOREIGN PATENTS 71,669 Switzerland Feb. l, 1916 161.258 Switzerland Apr. 30, 1933 162,066 Switzerland .lune 15, 1935 500,085 Great Britain Feb. 2, 1939 1,021,928 'France Dec. 10, 1952 ...num-f4.5