US230973A - Stephen d - Google Patents

Description

S. D. TUCKER. Revolving Type Bed.

No. 230,973. Patented Aug. 10,1880'.

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y ATTORNEYS RPH WASHINGTON D C mnsses STEPHEN D. TUCKER, OF NEW YORK, N. Y.

REVOLVING TYPE-BED.

SPECIFICATION forming part of Letters Patent No. 230,973, dated August 10, 1880.

Application filed April 21, 1877.

To all whom fit may concern Beit known that I, STEPHEN D. TUCKER, of the city, county, and State of New York, have invented certain new and useful Improvements in Revolving Type-Beds, ot' which the following is a full, clear, and exact description.

In the accompanying drawings, Figure 1 is a plan view of the type-bed; Fig. 2,-a transverse sectional elevation of the same on linee of Fig. 1; Fig. 3, a transverse sectional elevation of the same on line y, Fig. 1, showing the construction of one of the ends; Fig. 4, a longitudinal section of one end ofthe typebed on line x, Fig. 2, showing the bottom piece and column-rule in elevation; Fig. 5, an end view ofthe locking-bar; Fig. 6, plan and end views of one of the bottom pieces; and Fig. 7 plan and sectional views of a column-rule.

rThe type-cylinders of type-revolving printing-machines are limited in size by the width of the wed ge-s'naped space formed by the sides of two adjacent columns of type, which space is filled by the tapered column-rule, for it is obvious that the sm aller the cylinder, the wider this space becomes at the surface or faces of the type, and consequently the broader the blank line between the printed impressions from two adjacent columns of type. Moreover, this space is increased by the thickness required for the narrow feet of the columnrules now used, which must be made thick enough to give them the strength necessary to hold them and the type in place in the typebed. The greater this blank space is made the wider the printed page must become, the cost of paper is thus increased and the printed page rendered unsightly.

The object of this invention is the reduction of this space between the faces of the types composing columns set side by side upon a curved surface; and it consists in a construction of parts which permits the use of a very thin column-rule, whereby the size of the typecylinder may be greatly reduced, while the space between the columns of type is no greater than in the constructions now in use.

In carrying out my invention the feet of the column-rules are made to extend the whole length of the type-bed, and are provided at their bottoms with flanges 5 projecting from both sides. (See Fig. 7.) These column-rules rest throughout their whole length upon the convexedly-curved base-plate 7 ot' the typebed, and are secured in positions parallel to eachother by interposi n g between them bottom pieces, 3, which are of column width. These bottom pieces are provided at their ends with tenons 13, which lit into rabbeted recesses S formed in the ends 11 of the type-bed, and at one or more points of their length with feet 4, provided at each side with projections 1, which adapt them to entertransverse rabbeted grooves 6 in the base-plate 7. The said bottoln pieces are thus held iirinly in place in the type-bed, and being provided on their lower edges with rabbets 18, which fit over the iianges 5 ofthe column-rules 2, securely lock said column-rules between them.

The bottom pieces, 3, are introduced vertically into the type-bed by reason of their teuons 13 readily passing through the recesses 15 in the ends 11, the overhanging edges 10 of the grooves (i in the base-plate being removed l at the side 20 to permit the free entrance of the feet 4. Thus introduced each bottom piece may'enter its tenons 13 into the grooves 8, and its feet into the grooves 6, and be slid therein against the side 12, where the forward edge of the foremost bottom piece enters a groove, 16. A column-rule 2 is then introduced against its unprotected side, and another bottom piece, column of type, and column-rule 2 are introduced, and so on until the type-bed is full.

The locking-bar 9, which is nearly of typeheight, is then introduced and moved against the last bottom piece, 3. This locking-bar 9 has on each end tenons 14, with projections 2S, one of which enters the groove S and the other underlies the jaw 17, by which means it is held in place. The columns of type are then placed upon the bottom pieces between the columnrules.

The columns ot' type are forcibly pressed laterally in place between the column-rules by means of pressure applied to the locking-bar, which may be done either by the screws 19, shown in Fig. 2, or by wedge blocks or quoins,

or by side-sticks whoseinclinedfaces bear upon each other, and one of which sticks is moved longitudinally by any mechanical means.

The types of the columns may be pressed IOO firmly together endwise by power applied to blocks at the ends ofthe columns, the medium being screwsor similar devices, as has just been described with reference to the lateral movement of said types.

The type-bed may be secured upon the typeeylinder bythe usual meansthat i s, by screws or clamps, as is well understood.

Either the grooves 8 and tenons 12S, or the grooves 6 'and feet 4, may be the means for holding the bottom plates in plates, though both together are preferable.

\Vhat is claimed is- Llemovable column-rules having feet or flanges 5 extending throughout the length ot' the column of type, whereby greater strength with less thickness is secured, substantially as described.

2. The combination of the longitudinallylian ged column-rules 2, base-plates having 1ongitudinally rabbeted recesses, and bottom pieces, 3, having rabbets 18 and flanged feet- 4, substantially as described.

In testimony whereof I have signed my name to this specifica-tion in the presence of two subz 5 scribing witnesses.

. STEPHEN D. TUCKER.

Witnesses:

H. T. MUNsoN, M. B. PHILiPP.

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