US2744712A

US2744712A - Easel

Info

Publication number: US2744712A
Application number: US396896A
Authority: US
Inventors: Franz D Brandt
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-12-08
Filing date: 1953-12-08
Publication date: 1956-05-08
Anticipated expiration: 1973-05-08

Description

y 1956 F. D. BRANDT 2,744,712

' EASEL.

Filed Dec. 8, 1953 2 Sheets-Sheet l IN V EN TOR.

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y 8, 1956 F. D. BRANDT 2,744,712

Filed Dec. 8, 1953 2 Sheets-Sheet 2 1": IIIIIIIIIIIIIIIIIII I: 11111 .619 1%.]0, 0 INVENTOR.

izjaxzzflfirwzdzj United States PatentO EASEL Franz D. Brandt, Berkeley, Calif.

Application December 8, 1953, Serial No. 396,896

1 Claim. (Cl. 248-166) This invention relates to easels, and more particularly to an improved artists collapsible easel.

A main object of the invention is to provide a novel and improved foldable easel which is simple in construction, which is easy to set up, and which is arranged to support an easel board either in a substantially horizontal position or in an adjusted upright position.

A further object of the invention is to provide an improved artists easel which is inexpensive to manufacture, which is foldable to a very small volume, which is light in weight and which is durable in construction.

Further objects and advantages of the invention will become apparent from the following description and claim, and from the accompanying drawings, wherein:

Figure l is a perspective view of an improved artists easel according to the present invention, shown set up for supporting an easel board in an upright position.

Figure 2 is an enlarged fragmentary elevational view showing the upper portion of the easel of Figure 1.

Figure 3 is a perspective view of the easel device of Figure 1 with the top portion thereof collapsed and arranged for supporting an easel board in an inclined, downwardly facing position. I

Figure 4 is an enlarged elevational view of the upper portion of the easel device of Figure 3.

Figure 5 is a perspective view showing the easel device of Figure 1 arranged to support an easel board in a substantially horizontal position.

Figure 6 is a fragmentary enlarged side elevational view of the easel structure of Figure 5.

Figure 7 is a fragmentary enlarged top plan view of the central portion of the upper, easel-supporting structure of the arrangement of Figure 5.

Figure 8 is a side elevational view of the structure shown in Figure 7.

Figure 9 is an enlarged cross sectional detail view taken on the line 9-9 of Figure 4.

Figure 10 is an enlarged cross sectional detail view taken through one of the telescopic legs of the easel device on the line 10-10 of Figure 3.

Figure 11 is an enlarged elevational detail view showing the joint between one of the top arms and one of the tripod legs of the easel structure of Figure 1.

Figure 12 is a cross sectional detail view taken on the line 12-12 of Figure 11.

Figure 13 is a perspective detail view showing the cooperating locking plates employed in the joint structure of Figure 11.

.Figure 14 is an enlarged cross sectional detail view taken on the line 14-14 of Figure 5.

Figure 15 is an elevational view of the easel-board supporting structure of Figure 1 shown in folded position.

Figure 16 is a cross sectional view taken on the line 16-16 of Figure 15.

Figure 17 is a cross sectional view taken on the line 17-17 of Figure 15.

Referring to the drawings, the easel is generally desice ignated at 21 and comprises an easel board-supporting structure 22 on which is mounted the easel board 23.

The easel-board supporting structure comprises a main bracket member 24 formed with three coplanar, downwardly facing, angularly spaced

channel elements

25, 26 and 27 in each of which is pivoted the end of a

respective arm

28, 29 and 30. As is clearly shown in Figures 7 and 8, the ends of the

arms

28, 29 and 30 are received in the

respective channels

25,26 and 27 and are rotatable therein, the channels, however, limiting rotation of the arms beyond the coplanar positions thereof, shown for example, in Figures 5 and 6.

Secured to the arm 30, facing the

arms

28 and 29 is the spring clip 31 which is formed to at times receive the

arms

28 and 29 in the manner illustrated in Figures 3 and 4 to releasably secure the

arms

28 and 29 in' parallel relationship to the arm 30.

Secured on the arm 30 above the spring clip 31, as viewed in Figure 2, is a collar 33 to which is secured the ends of respective

coiled springs

34, 34, said springs being provided at their outer ends with the

hook elements

35, 35 adapted to enga'gethe respective opposite side edges of the easel board 23 in the manner illustrated in Figures 1 and 2.

Each of the

arms

28 and 29 is provided with a spring hook 36, said hooks having shanks extending slidably through the

respective arms

28 and 29 and provided at their ends with the enlarged head portions 37 against which bear the coiled springs'38, the coiled springs bearing between the heads 37 and the respective arms to bias the right angled ends 39 of the hooks against the respective arms, as is clearly shown in Figure 2.

The hooks 36 may be employed to engage the bottom edges of the easel board when it is desired to support the easel board in a relatively high position on the supporting structure 22.

Pivotally connected to the ends of the

respective arms

28, 29 and 30 are the

respective tripod legs

40, 41 and 42. As shown in Figure 11, the pivotal connection comprises a pivot bolt 43 extending through the joined ends of the arm and leg and provided at its end with the wing nut for locking the joint with the arm and leg in a desired adjusted angular relationship. Between the arm and leg are the respective channeled

plates

45 and 46, the plate 45 receiving the leg and the plate 46 receiving the arm, the bolt 43 passing through central apertures in the plates 45 and 4 6. The plate 45 is formed with circularly arranged recesses 47 and the plate 46 is arranged with circularly arranged projections 48 adapted tofitinto the recesses'47 to lock the platesagainstrotation with respect to each other when the wing nut 44 is tightened. Since the upper end of the leg is received in the plate 45 and the lower end of the arm is received in the plate 46, the arm is thus locked against rotation relative to the leg. Thus, the

respective tripod legs

40, 41 and 42 may be clamped in desired angular relationship with respect to the

respective arms

28, 29 and 30 to which they are connected.

Adjustably secured on the upper portions of the

legs

40 and 41 are the

respective collar members

49, 49, said collar members being provided with the hook elements As shown, the

legs

40, 41 and 42 are telescopic, each leg comprising an outer tubular section, an intermediate tubular section, shown at 54 in Figure 10 which is telescopically received in the outer section and an inner tubular section 55 which is telescopically received in the intermediate section 54. The telescopic sections are releasably secured in adjusted positions relative to each other by suitable locking means comprising a threaded stud member 56 rigidly secured to the end of the inner section and extending axially, as shown, the stud 56 being provided with the head 57. A sleeve 58 of resilient deformable material, such as rubber or the like is engaged on the stud 56, and threadedly engaged on the stud is a nut 59. The sleeve 58 fits relatively tightly in the outer section and thus remains substantially stationary when the inner tubular section is rotated. At the same time, the nut 59 frictionally engages the end of the sleeve and is substantially held against rotation relative to the sleeve 58. Therefore, when the intermediate section 54 is rotated, the nut 59 advances on the threaded stud 56, bearing against the rubber sleeve 58, causing said sleeve to be expanded in diameter. This tightly locks the intermediate section 54 relative to the outer tubular section of the leg. Similarly, the inner section 55 of the leg may be releasably locked in an adjusted position in the intermediate section 54 by rotating said inner section 55 in the same direction as was employed for locking the intermediate section in its outer tubular section.

The legs are retained in telescopic engagement by the provision of transverse stop pins 60 extending through the sections adjacent the respective tightening studs 56 and cooperating with inturned annular flanges 61 on the ends of the receiving tubular sections, as is clearly shown in Figure 10, to prevent separation of the telescopic sections.

The tripod structure may be arranged as shown in Figure l to support the easel board 23 in the conventional manner with the bottom edge of the board supportingly engaged by the hook elements 50 and the side edges of the easel board engaged by the

hooks

35, 35. Alternatively, the

legs

28 and 29 may be engaged in the spring clip 31 so as to be retained in prallel relationship to the leg 30 and the easel board may be thus supported in an inclined, downwardly facing position, as shown in Figures 4 and 5. A further alternative arrangement is shown in Figures 5 and 6, wherein the

arms

28, 29 and 30 are arranged in coplanar relationship and clamped in substantially horizontial positions to support the easel board 23 in a horizontal position illustrated in Figures 5 and 6.

When the easel board-supporting structure is not in use, it may be folded to the collapsed position thereof shown in Figures 15, 16 and 17, wherein the

legs

40, 41 and 42 are telescoped to their shortest lengths and are 4 folded parallel to the

arms

28, 29 and 30, the

arms

28 and 29 being received in the spring clip 31. In this position, the coiled springs 34 are engaged around the

legs

40, 41 and 42 and the hooks 35 on the ends of the springs are interengaged to secure the structure in its folded position.

Channels

25 and 26 are preferably spaced apart by an angle of approximately degrees, whereas, channel 27 is preferably spaced from

channels

25 and 26 by respective angles of approximately degrees. This allows the easel to be adjusted to the positions shown in Figures 1 to 5 without requiring excessive spreading of the front legs of the easel.

While a specific embodiment of an improved easel structure has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claim.

What is claimed is:

In an easel, a main bracket member, three coplanar channel elements formed in said bracket member and extending at substantial angles relative to each other, respective arms pivotally connected at their ends in the intermediate portions of said channel elements for swinging movement into and out of the channel elements, whereby said channel elements at times receive said arms and limit rotation of said arms beyond the coplanar positions thereof, and whereby said arms define a planar support for an easel board in the coplanar positions of said arms, respective tripod legs pivoted to the ends of said arms, means for clamping said legs to said arms in adjusted positions thereof, a pair of resilient flexible members secured to one of said arms, respective hook elements on the ends of said flexible members adapted to engage the opposite edges of an easel board supported on said arms, and respective easel-supporting hook members on the remaining two arms adapted to at other times supportingly engage the bottom edge of an easel board to support said board in an upright position against said remaining two arms.

References Cited in the file of this patent UNITED STATES PATENTS 2,019,214 Denny Oct. 29, 1935 2,127,494 Tepper Aug. 23, 1938 2,441,932 Curry May 18, 1948 2,550,550 Goodstein Apr. 24, 1951 FOREIGN PATENTS 645,044 Great Britain Oct. 25, 1950