US953719A - Drawing-table. - Google Patents

Description

J. P. SKRIPEC.

DRAWING TABLE.

APPLICATION FILED mo. 21,1908.

Patented. Apr. 5

Cir

JOHN P. SKBIPEC, OF CINCINNATI, OHIG.

DRAWING-TAB LE.

Specification of Letters Patent. fqyg qrgirgfi Any, 5, jfi jfi,

Application filed December 21, 1968.

Serial No.

To all whom it may concern:

Be it known that I, JOHN P. SKRIPEC, a subject of Austrialiungary, and residing at Cincinnati, Hamilton county, State of Ohio, have invented certain new and useful Tmprovements in Drawing-Tables; and I do declare the following to be a clear, full, and exact description of the invention, attention being called to the accompanying drawing, with the reference characters marked thereon, which forms also a part of this specification.

This invention relates to improvements in the construction of adjustable tables, more particularly such which are intended for use in drawing and the construction is accord ingly devised to suit this purpose.

In the following specification and particularly pointed out in the claims at the end thereof, will be found a full description of my invention, together with its manner of use, parts and construction, which latter is also illustrated in the accompanying drawing, in which Figure 1, is a front-view of the table showing its top, which is the table proper, adjusted to horizontal position. Fig. 2, is a side-view of Fig. 1, the top, parts of which are omitted, being shown adjusted to different angular positions. Fig. 3, is the upper part of one of the two standards which support the top. Fig. 4, is a vertical, central section through one of these standards. Fig. 5, shows a top-view of one of these standards, it being substantially a section on line 55 of Fig. 2, note also Fig. 1. Fig. 6, is a hori zontal section on line 6--6 of Fig. 1, (observe this line also on Figs. 2, 3 and at.) Fig. 7, is a horizontal section on line 77 of Fig. 4, (observe this line also in Figs. 1, 2 and 3).

A is the top of the table or the table proper. It is supported on two brackets 13 B, they having each a flange 7), whereby they are attached to the underside of the top. They are supported on two side-frames or standards which consist each of two parts, an upper one and a lower one. adj ustably connected. Brackets B are pivotally attached to the upper ends of the upper parts of each side-frame, and so as to be angularly adjustable thereon. These upper parts of the side-frames are designated by C, and are hereafter termed posts. They are slidably fitted into recesses cZcZ in the lower part of the side-frames, which lower parts are designated by D and hereafter called housings. They are held together by tierods 10, so as to form a connected rigid frame. Posts G at their upper ends are also held together by a tie-rod 11, so that both may move together with reference to the lower frame-parts. This tie-rod projects beyond the posts on each side and serves as the pivots upon which brackets 13 are mounted. l'tuts 12 hold these brackets laterally in position. Similar nuts 13 are applied at the ends of tierods 10. Those on the upper one of these tie-rods 10, are located in the recesses (Z and near their upper ends.

For the purpose of adjusting the angular position of the top, a worm and wormavheelmovement is used, brackets B being shaped to form also segmental worm-wheels, as shown at Lt. They engage each with a. worm 15, the shafts 16 of which worms are supported inbearings provided at the upper end of each post C. There is one bearing 17 provided directly on the post and another one 18 on a. bracket 19, which forms a lateral extension on each post. Rotation of the worms effects rotation of the wormwheels, which, constituting also the supporting means (brackets) of the top, change the angular position of this latter. It is desirable for obvious reasons, that both worms rotate simultaneously, so that both of the brackets, which support the top, move together. For such purpose I provide a shaft 20, ar 'anged at an angle to the worm-shafts, and by two sets of complementary bevelwheels 21, one wheel in each set on each worm-sh aft, and each engaged by a complementary wheel on shaft 20, simultaneous rotation of all connected shafts may be had which moves both brackets B simultaneously and thereby tilts the top. This shaft 20 is supported in bearings 22-, which are provided on brackets 23 forming extensions from posts C. A suitable crank-handle E is provided for rotation of this shaft, and the arrangement is such, that this handle is removable and may be applied at either end of shaft 20, each end of it being shaped to receive this handle, as shown at e. No special locking means are required to hold the top in its adjusted position since worms 15 serve for such purpose.

Both posts C, as before alluded to, are arranged for simultaneous vertical adjustment on housings D, which is accomplished by a screw-movement, constructed as follows: Each post C, preferably at its lower end, has a nut c, and screws 2% are provided, one in the recess (Z of each housing D. These screws pass through nuts 0, and are supported in a manner to be free to rotate while held longitudinally in a fixed position. Bearings are provided for them accordingly, one bearing 25 in the lower part of each housing D, and one at 26, farther up, these latter bearings extending into recesses (I. Theyextend also partly into posts C, which latter are hollow as best shown in Figs. 1, (3 and 7. No extra. space is thus required for the parts involved in this mechanism, and

the same recess which accommodates posts C, receives also screws 21, one being within the other, and a compact structure is the result. It will now be seen that rotation of screws 24, causes movement of nuts 0 fitted to them, and thereby also movement of the posts. For obvious reasons, this rotation should be simultaneous for both screws, for which purpose sets of complementary bevelwheels 27 are provided, one wheel at the upper end of each screw 21, and one for each of them on a shaft 28, mounted on the housings and extending from one to the other. It also extends through posts C and beyond them on each side these posts being slotted on their outer side and its ends are arranged to receive a manipulating handle. By preference one handle is used for both shafts 20 and 28, handle E for the purpose, it being moved from one shaft to the other and attached as required. No special locking means are needed, since nuts 0, which support posts C, cannot move unlessscrews 24 are rotated. It will now be seen that by manipulation of shaft 20, which causes movement of brackets B on their pivots, the table supported by these brackets may be adjusted to a horizontal position as shown in Fig. 1, or to a vertical position as shown in dotted lines in Fig. 2, or to intermediate angular ones inclining to either side as shown likewise in this latter figure.

The top, irrespective of its particular angular position, may be vertically adjusted by manipulation of-shaft 28, in which case the ensuing rotation of screws 2%, causes posts C to move either up or down, in housings D. As will be seen, the position of shaft 28 operated for the vertical adjustment with reference to the floor is always the same and therefore remains a normal one. tion of shaft 20 with reference to the table and operated for tilting this latter, remains also the same which circumstances are quite an advantage as aiding the positioning of handle E, since the hand soon becomes used. to these positions and quickly finds them after becoming accustomed thereto.

before described serving The posi- 29 is a drawer contained within a suitable case 30 secured between the side-frames and resting upon the lower tie-rods 10.

The outwardly open recess (Z (see Fig.

Fig. 6.

Having described my invention, I claim as new:

1. In an adjustable table, the combination of two opposite housings, each provided with av vertical recess, tie-rods whereby they are connected to form a rigid frame, two posts, one slidably fitted into the recess of each housing and each post provided with two alined bearings and with an additional third bearing, which latter isarranged at right angles to these alined bearings, a tierod connecting both posts, at their upper ends and in a manner that the third bearing on one post, is opposite the third bearing of the opposite post and alinedtherewith, means whereby both connected posts may be simultaneously adjusted in the recesses of the housings, segmental wormwheels extended peripherically to form attaching flanges and mounted upon the post-- connecting tie-rod, one at each end thereof, a table-top secured upon these flanges,

upon which they are mounted and which shafts are supported in the alined bearings, one shaft on each post, an operating shaft supported by both posts and journaled with ings in both posts, bevel-wheels, one on each to rotate this latter for the purpose of adjusting the tabletop on the posts.

In an adjustable table, the combination of two opposite housings, each provided with a vertical recess in its outside, tierods whereby they are connected to each other to form a rigid frame, two hollow posts, one slidably fitted into the recess of each housing, the posts on their inner side next to thehousings being open and slotted on their outer side opposite to this open inner side, two screw-bearings provided in the recess of each housing, one at the lower end thereof and one near the upper end, the latter bearing extending into the hollow posts, a nut provided at the lower end of each post, screws provided in the space inand by the hollow posts, they being fitted to the nuts on these latter and seated for rotation in the bearings provided for them in the housings between which bearingsthey are longitudinally confined, a bevel-wheel mounted at the upper end of each screw above the upper screw-bearing thereat, an

above the upper ends of the screws and extending through these housings and through may be closed by a cover 31 as shown in worms in mesh with the worm-wheels, shafts its ends in the alined opposite third bearworm-shaft and a mate for each bevel-wheelmounted on the operating shaft, and means closed by the recessed part of the housings operating shaft mounted in the housings the hollow posts beyond which it projects t-aneously both posts and a table-top SL1},- on each side where its ends are shaped to ported by these latter. receive a crank-handle for manipulation, In testimony whereot I hereunto afiixiny hevel- Wheels mounted on this operating signature in the presence of two Witnesses. shaft which mesh with the bevehwheels on JOHN P. SKRIPEC.

the screws so that both of these latter may I lVitnesses: be simultaneously rotated when the oper- C. SPENGEL, ating shaft is rotated, moving thereby silnul- I T. LE BEAU.

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