US818271A - Drafting-table. - Google Patents

Description

PATENTED APR. 17, 1906.

G. W. MARTIN.

DRAFTING TABLE.

APPLICATION FILED FEI3.14,1905.

2 SHEETS-SHEET 2.

WITNESSES.-

a OFFIGIE.

GEORGE WILLIAM MARTIN, OF AKRON, OHIO.

DRAFTlNG-TABLE.

Specification of Letters Patent.

Patented April 17, 1906.

Application filed February 14,1905. Serial No. 245,575.

To all whom it may concern:

Be it known that I, GEORGE WILLIAM MAR- TIN, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Drafting-T ables, of which the following is a specification.

My invention relates to improvements in drawing-tables, or, .as they are sometimes called, drafting-tables; and one object of my invention is the provision of a table of this character which can be instantly adjusted to any desired position, according to the work for which it is to be used, and which can be quickly retained at the desired adjustment.

Another object of my invention is the provision of a drawing or drafting table which will be instantly capable of any desired adjustment and which will be compact in construction and light in weight to permit easy handling and transportation, which will be the essence and embodiment of simplicity, durability, and inexpensiveness of construction, and which will be thoroughly efiicient for the desired purposes and entirely practical in every particular.

To attain the desired objects, my invention consists of a drafting or drawing table embodying novel features of construction and combination of parts, substantially as disclosed herein.

In order that the details of construction and the operation of my invention may be readily understood and its numerous advantages be fully appreciated, I have shown in the accompanying drawings a drafting-table embodying my invention.

Figure 1 represents a front elevation of a complete drafting-table constructed in accordanoe with my invention. Figs. 2 and 3 represent detail views, on an enlarged scale, of the mechanism for raising and lowering the table or for adjusting it vertically. Fig. 4 represents an end view of the table, showing in dotted lines the table in raised and inclined position. Fig. 5 represents an enlarged sectional view of the clamping and adjusting means, and Fig. 6 represents a sectional view on the line 2 2 of Fig. 4. Fig. 7 is a detail view of lamp-bracket.

Referring by numerals to the drawings, in which similar numerals of reference denote corresponding parts in the several views of the drawings, the numeral 1 designates the platform or table proper, which at its ends, on the under side and near one edge, is provided with the depending brackets 2, to which are pivoted the upper ends of the slotted links or arms 3, and centrally at each end on the under side of the table is providedthe pair of depending brackets 4, which are hinged or pivoted to the upper ends of the rectangular sliding bars 5, said bars fitting in the guideboxes 6 and being vertically adjustable in said boxes. These boxes form the vertical legs or supports of my table and are connected by the horizontal strips 7 and have the supporting-legs 8 secured thereto, the whole structure forming the frame of my table and the end boxes forming the guides and retain- 7o ers for the sliding bars. The slotted arms or links are guided in the channeled sleeves 9 and are adjustable on the threaded stems or bolts 10, which carry the adjusting-nut 11 and have the headed portion 12, which is 7 5 seated in one wall of the end boxes and bears upon the clamping-plate 13, which plate presses against the sliding bar on one side and holds the bar in the proper adjustments, as well as the slotted arms or links.

In addition to the means just described for holding the slotted links and the sliding bars in position I employ the binding-plates 14. which by means of the head 15 on the bolt 16, which is operated by the binding-nut 17, brings the plates against the opposite face of the sliding bar, and thus the bars are held in the proper position by the headed bolts on each side, and it is thus impossible for the ta ble to slip or sag, and the proper adjustment is assured under all conditions.

From the foregoing it is evident that the table can be adjusted vertically and secured at any vertical adjustment and may be inclined to any desired angle or pitch and secured at 5 the desired inclination, and for the purpose of quickly raising and lowering the table I provide a novel mechanism, which I will now roceed to describe.

About the center of the table and from the under side is secured the hanger or bracket 18, to which is connected the upper end of the screw 19, said screw being of sufficient length and protected by a tube or jacket 20. Aplate 21 is secured to the upper cross-piece of 10 5 the table at 22, and upon said plate is formed the stud 23, which forms the bearing for the wheel 24, having on one side the operatinghandle 25, and upon its other face being formed with bevel-gear teeth 26, which on no gage the bevel-gear 27, having the worm portion 28 to engage the vertical screw 19, and

thoroughly eflicient and by the turning of the hand gear-wheel the -bevel-gear is revolved and raises and lowers the vertical screw and in consequence adjusts the table vertically with ease and rapidity.

From the foregoing description, taken in connection with the drawings, it is evident that I provide a drafting-table which can be instantly adjusted to any desired position and which will under all conditions remain in the proper adjustment, which is light in weight, but strong and durable, and which is practical in every particular.

In connection with my drawing-table I use the novel form of bracket shown in Fig. 7, which is attached to the table, as shown, and which forms a perfect support for a lamp or for the tools used by the draftsman. It will be observed that this bracket is adjustable to accommodate the requirements of the user.

I claim 1. In a drafting-table, the combination with a frame, having vertical hollow standards, of supports slidably adjustable in said standards, the table-top carried by said supports, clamping-plates loosely attached to the inner surfaces of said hollow standards, bolts extending through said standards having heads which engage the clamping-plates, and means for drawing upon the bolts to clamp the plates tightly against the sliding supports.

2. In a drafting-table, the combination with a frame, having vertical hollow standards, of supports slidably adjustable in said standards, the table-top pivoted to said supports, clamping-plates loosely attached to the inner surfacesof said hollow standards, bolts extending through said standards having heads which engage the clamping-plates, and means for drawing upon the bolts to clamp the plates tightly against the sliding supports, channeled sleeves mounted to rotate on said bolts and slotted links passing through said sleeves and over said bolts, one end of each of said links being pivoted to the table-top, said. drawing means being adapted when actuated to operate the clamping-plates to simultaneously clamp the links against the sleeves, whereby the top is simultaneously secured in both angular and vertical adjustment.

3. In a drafting-table, the combination with a frame, having vertical hollow standards, of supports slid ably adjustable in said standards, the table-top carried by said. supports, spring-metal clamping-plates attached at one end to the inner surfaces of said hollow standards, bolts extending through said standards having heads which engage the clamping-plates at their free ends, and means for drawing upon the bolts to clamp the plates tightly against the sliding supports.

4. In a drafting-table, the combination with a frame, having vertical hollow standards, the supports slidably adjustable in said standards, the table-top carried by said supports, a pair of clamping-plates loosely attached to the opposite inner surfaces of each hollow standard, bolts extending in opposite directions through said standards and having heads which engage the clamping-plates,

and'means for draw ng the same to clamp the plates tightly against the slid ng supports on opposite sides thereof.

5. In a drafting-table, the combination with a frame, having vertical hollow standards, the supports slidably adjustable in said standards, the table-top carried by said supports, a pair of spring-metal clamping-plates attached at one end to the opposite inner surfaces of each hollow standard, bolts extending in opposite directions through said standards and having heads which engage the clamping-plates at their free end s, and means for drawing the same to clamp the plates tightly against the sliding supports on opposite sides thereof.

6. In a drafting-table, the combination with a frame, having vertical hollow standards, the supports slidably adjustable in said standards, the table-top pivoted to said supports, a pair of clamping-plates loosely attached to the opposite inner surfaces of each hollow standard, bolts extending in opposite directions through said standards and having heads which engage the clamping-plates, and means on each of the bolts for drawing the same to clamp the plates tightly against the sliding supports on opposite sides thereof, channeled sleeves mounted. to rotate on a pair of said bolts one on each of said standards opposite each other, slotted links passing through said sleeves and over said bolts, one end of each of said links being pivoted to the tabletop, said drawing means, on the above-mentioned sleeve-carrying bolts, being adapted, when actuated to operate the clampingplates, to simultaneously clamp the links against the sleeves, whereby the top is simultaneously secured in both angular and vertical adjustment.

7. In an adjustable standard for a table, a

vertical hollow standard supported from the floor, a support slidingly adjustable in said standard, a top carried on said supports, a

clamping-plate loosely attached to the inner surface of the hollow standard, a bolt extending through said standard and having a head which engages the clamping-plate, and means for drawing upon the bolt to clamp the same tightly against the sliding support.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE WILLIAM MARTIN. Witnesses: E. T. MoHN, J. D. RITCHIE IIO

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