US829246A - Copying-press. - Google Patents

Description

.NO- 829.246. I PATENTED AUG. 2l, 1906. J. A. A. DAYGUESVIVES.

COPYING PRESS.

APPLICATION FILED SEPT. 15. 1905..

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PATENTED AUG. 21, 1906.

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COPYING PRESS.

APPLIUATION FILED s221215, 1905.

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UNITED STATES PATENT oEErcE.

Specification of Letters Patent.

Patented Aug. 21, 1906.

Application filed September 15, 1905. Serial No. 278,663.

To all whom t may concern.-

Be it known that I, JEAN ALBERT AU- GUSTE DAYGUEsvrvEs, gentleman, residing at 132 Avenue Victor Hugo, Paris, France, have invented Improvements in Presses, of which the following is a full, clear, and exact description.

This invention relates to an improved press with compensating plate especially adapted to be used as a copying-press.

This press is so constructed as to require the smallest possible space, giving at the same time a pressure which will be powerful and uniform at all points. It is not necessarily secured to a support and insures a uniform pressure with the same stroke of the operating-lever whatever be the thickness of the copy-book or of the parts to be pressed.

The accompanying drawings show by way of example a copying-press made according to this invention. y

Figure l is an elevation. Fig. 2 is a plan view, the cover being removed. Fig. 3 is a vertical section made on the line A A of Fig. 2. Fig. 4 is a detail view showing the movable plate seen from underneath. Fi 5 is a partial section made on the line B B o Fig. 3.

As shown in the drawings, this press comprises, first, a stationary frame having a base a, and an upper cover connected with the former by uprights c, forming ties 5 second, a compensating plate d, movable between the base a and the cover l), this plate being guided in its vertical motion by means of the uprights c; third, a driving-shaft c, located in the base a, carrying eccentrics f, on which rests the movable plate d and ending in a square adapted to receive an operating-lever g.

In order to allow the pressure to beregulated independently of the stroke of the operating-lever, this press possesses the following adjusting device: The plate d is carried by eccentrics f through a movable part h, carrying two wedges i, located in recesses of corresponding shape, Fig. 3, provided in the plated. An operating screw j, rotating within a nut 7c, embedded within the plate d, allows a shifting of the wedges in their recesses, which in virtue of their inclined surface impart a shifting motion to the wedges i, and therefore to the part h. By operating the screw j the position of the part 7L can be regulated at will, so that the latter will be fiush with the lower face of the plate d or will project more or less. The wedges i will be preferably secured to the plate d through screws l, arranged at the bottom of the re- I cesses, Figs. 3 and 5, and the heads of which are inserted in dovetailed guides with which each wedge is provided.

In order to prevent the driving-shaft from returning backward under the action of exerted pressure, a half ring or collar m is secured to the base a, so as to exert upon the shaft e a friction which can be adjusted according to the amount of pressure.

The copy-book being placed on the plate d, it will be only necessary to move the lever g to impart an angular displacement to the shaft c, and therefore to the eccentricsf. The latter will lift the plate d, that presses the copy-book with great force against the upper cover l). By returning the lever g the eccentrics f no longer press upon the plate d, which latter is again brought down under the action of its weight, and thereby allows the removal of the copy-book. Therefore the operation is very simple and very quick.

The adjusting appliance 7L i enables an arrangement such that the maximum pressure will always be exerted at the moment when the point of contact between the eccentrics and the part h lies on vertical lines passing through the axis of the shaft e, so that the said eccentrics will not tend to return backward on account of the reaction.

In the present system of press the strain being communicated at different point-s to the plate d the pressure exerted by the latter is approximately uniform at every point.

For presses of small size-as copyingpresses, for example-two eccentrics like those represented in the drawings will be suficient. For presses of larger size the shaft e can carry a greater number of eccentrics, and in the case of powerful presses of very large sizes I employ a greater number of shafts arranged parallelly and connected together by any transmitting-gear, either by a chain or by links and cranks, &c. Furthermore, the presses of large sizes can be provided ,side-, wise with hooks, enabling a firm connection to be made between the upper cover and the base at several points7 and therefore to prevent any bending of the former.

In this press only vertical strains will be exerted, the action and reaction of which will be respectively supported by the base a and the cover b. Under these conditions it is not necessary to secure the press to a support. l

The present device has the further advan- TOO ITO

tage of occupying very little space and leaves the upper face of the cover entirely free, Which face can be utilized as atable.

With this construction of press the copybook can be preserved against indiscretions by locking the same against the upper cover b, by lifting the plate d, and by removing the operating-lever g.

I claim- In a press, in combination, a base-plate, a shaft rotatably mounted therein and carrying eccentrics, a movable plate having recesses in the side thereof adjacent to said eccentrics, a pair of movable Wedges rigidly connected together mounted in said recesses and resting on said eccentrics, a cover-plate toward which said movable plate may advance, and means for adjustin said Wedges.

The foregoing specification o my im r0vements in presses signed by me this 17 t day of August, 1905. l

JEAN ALBERT AUGUSTE DAYGUESVIVES.

Witnesses: y

H. C. CoXE, MAURICE H. PIGNET. ,Y

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