US1508513A

US1508513A - Plate-shaving machine

Info

Publication number: US1508513A
Application number: US638855A
Authority: US
Inventors: William A Field
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-05-14
Filing date: 1923-05-14
Publication date: 1924-09-16
Anticipated expiration: 1941-09-16

Description

Sept. 16 19.24. 1,508,513

W. A. FIELD PLATE SHAVING MACHINE 7 Filed May 14. 1923 2 SheetS-Sheet 1 Sept. 16 p 1924. 1,508,513

W. A. FEELD' PLATE SII-IAVING momma filed May 14. 1923 2 Sheets-Sheet 2 33 of the bed of the machine,

are recessed, as best shown in Patented Sept. 16, 1924,

earenr 'FFIQE.

WILLIAM A. FIELD, or CHICAGO, ILLINOIS.

PLATE-SHAVING MACHINE.

' Application filed May 14,

To all whom it may concern:

Be it known that I, WILLIAM A. FIELD, a citizen of the United States, and aresident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Plate- Shaving Machines, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements thatare primarily designed for use in connection with machines employed in the shaving or planing of the surfaces of metal plates such as electrotype and stereotype plates, and it has for its object to provide such machines with improved means located close to and in advance of the usual knife blade for bearing down upon the plate that the knife is operating upon so as to hold such plate firmly in position against the flat bed that it rests upon, and thereby ensure the formation by the knife blade of a perfectly smooth and uniform surface. I accomplish this object by the means shown in the drawings and hereinafter particularly described. That which I believe to be new will be pointed out in the claims.

In the drawings, v

Fig. 1 is a plan view of a machine embodying my improvements;

Fig. 2 is a perspective view of one of the spring pressure fingers that bear against the plate being operated on;

Fig. 8 is an enlarged cross-section on line some parts being broken away, and showing in front elevation my' improved platepressing means;

Fig. 4 is a side elevation of the knifecarrying means and the means that carry the plate-pressing devices; and

Fig. 5 is an enlarged vertical section taken at the line 55 of Fig. 1.

Referring to the several figures of the drawings, indicates the flat bed of a machine upon which the plate tobe shaved or planed is placed and held as usual. Over each side marginal portion of the bed is arranged a long rack bar 11, the forward end of each rack bar having bolted thereto a head 12, the inner surfaces of which heads Fig. 3, to partially embrace the marginal portions of the bed, and in the lower portlon of the recesses of these heads are preferably located wearing ribs 13 (see Fig. 3) as usual. The

1923. Serial No. 638,855.

two heads 12 are connected together by the- '1 usual blade-carrylng bar 14which, as is customary, is arranged diagonally so that the cutting blade that it carries, and which is here indicated by 15, willv sented to the work so as to shearing action. The cuttingblade 15 is bolted to the downwardly inclined front face of the cross-bar 14 by bolts 16 that, as usual, 1 pass is further held down to its work by a number of set screws 17 that pass through an overhanging lip on the cross-bar and impinge against the upper edge of theblade, such screws being held locked in place by nuts 18. i

The rack bars 11 and connecting crossbar 14 form a sliding carriage which is .moved longitudinally of the bed of the machine by any suitable means.

is moved by meansof a motor cated which larger which shaft is secured at one enda gear 23 that meshes with and drives another gear 24 fast upon a shaft 25 that extends across and above the bed of the machine and carries two pinions 26 that'respectively en- As shown, it that is indigenerally by 19 and upon the shaft of is a gear 20 that meshes aWitll -a gage with the two rack bars 11. This slid-1,

ing carriage construction and the means for operating the same that have been thus briefly referred to are of well-known construction.

Turning now to the means for exerting constant pressure against a plate. that is being shaved or planed, and with which pressing means my invention is more particularly concerned, 27 indicates two heavy arms pivotally connected respectively to opposite end portions of the transverse bladecarrying bar 14. As best shown in Fig. .1, the rear end portion of each of these arms is bifuroated so as to embrace an ear 28'that rises from said bar 14 and is pivotally connected therewith by a pin 29. The forward portion of'each arm is very considerably enlarged, as clearly shown in Fig. 4, and, as theresliown, is so shaped as to rest at its inner edge against the forward inclined edge portion of the bar 14 and at its lower edge rests upon the upper face of the adjacent head 12. Through the enlarged forwardportion of each of these comparatively thick-and heavy arms 27 is formed an opening 30'of-oon be properly pre-v give the desired through slots such asi'ndicated' by the dotted linesv in Fig. 5, and the blade gear 21 mounted upon a shaft 22, to, 1

siderable size and, as here shown, rectangular in shape. lnto these elongated rectangular openings project the end portions 32 of a bar 31 that lies a short distance in advance of the blade-carrying bar 14. As best shown in Fig. 1, these end portions 32 are ofiset rearwardly somewhat from the main portion of the bar 31 so as to carry the main body of the bar the proper distance away from the cutting blade 15. The lower portion of the outer face of the bar 31 is, as best shown in Fig. 5, rather sharply beveled or inclined so as to form a rather broad diagonal face for a series of pressure fingers to rest against and be secured to. These pressure fingers are indicated by 33 and, as best shown in Fig. 2, each is formed of a flat piece of sheet metal. These pressure fingers 33 extend diagonally from front to rear and the lower marginal portion of each is slight ly curved so as to move smoothly over the plate that the blade 15 is acting upon, and by reason of the inherent resiliency of the metal of which such fingers a-e formed, a constant steady pressure will be exerted by them on the plate (such plate being shown in dotted lines in Figs. 3 and 5 and being indicated by A) which will hold the plate very firmly against the bed of the machine and also tend to prevent any tendency to buckle. It will be noted that, by reason of the rearward inclination given to these fingers 33, they are able to be located very closely to the cutting edge of the blade 15, and thus apply the desired downward pressure to the plate at the most effective place. The several fingers 33 are, in the construction shown, secured in place by a strip 34 that is secured by screws or otherwise to the bar 31 and clamps the fingers firmly against the inclined lower surface of such bar, as clearly shown in Fig. 3.

As here shown, the end portions 32 of the bar 31 that extend into and have a sliding lit in the openings 30 in the arms 27, rest upon coiled springs 35 (see Fig. 4) and through the upper wall of each or the arms 27 is screwed a bolt 36 that contacts with the underlying end portion 32, and thus by adjusting these bolts the bar 31 may be forced down against the pressure exerted by the springs 35 and thus regulate to the extent desired the pressure of the several fingers 33 against the plate being operated upon. WVhen the proper ustinent has been had the bolts will be locked against accid'ently turning by means'of nuts 37 carried respectively by said bolts.

Each of the arms has at its lower edge a forwardly-extending lug 38, and when the parts are in operative position the arms 27 will be locked firmly in place to their respective heads by suitable clamping blocks 39 bolted to the heads 12 and extending over the lugs 38. When it is necessary to have access to the cutting blade 15 for the purpose ct sharpening or adjusting it, the clamping blocks can be readily removed, as will be understood, and the arms 27 turned bacl; on their pivots 29, carrying with them, of course, the cross-bar 31. At- 40 the cross bar is shown as provided centrally on its front face with a lip that forms a convenient means for the operator to take hold of when turning such bar into and out of operative position.

What I claim as my invention and desire to secure by Letters Patent, is-

1. In a plate-shaving machine the combination with a plate-holding bed, a bladecarrying bar arranged transversely over the bed, a blade secured thereto, and means for moving said bar to cause the blade to operatively engage a plate on said bed, at a second bar normally held in advance of said blade carrying bar, means for yieldingly supporting said second-named bar in operative position, and plate-pressing means carried by and trailing behind said second'named bar and engaging with such plate in close proximity to the edge of said blade.

2. In a plate-shaving machine, the combination with a plate-holding bed, a bladecarrying bar arranged transversely over the bed, a blade secured thereto, and means for moving said bar to cause the blade to operatively engage a plate on said bed, of two arms connected with end portions of said blade-carrying bar and projecting orwardly therefrom, means for locking said arms in operative position, a second bar carried by said arms, and means carried by said second bar for exerting a pressure against such plate, said pressure means being inclined rearwardly toward the edge of the said blade.

3. In a plate-shaving machine, the combination with a plate-holding bed, a blade carrying bar arranged transversely over the bed, a blade secured thereto, and means for moving said bar to cause the blade to operatively engage a plate on said bed, 01 two arms connected with end portions of said blade-carrying bar and projecting forwardly therefrom, means for locking said arms in operative position, a second bar carried by said arms, and a plurality of fingers carried by said second bar for exerting a pressure against such plate, said fingers being inclined rearwardly toward the edge of the I said blade.

4c. In a plate-shaving machine, the combination with a plate-holding bed, a blew carrying bar arranged transversely over the bed, a blade secured thereto, and means for moving said bar to cause the blade to opera tively engage a plate on said bed, of a pair of arms pivotally connected with cnu portions of said blade-carrying bar to adapt them to be turned into inoperative or opera tive position, means for locking them in their operative position, a second bar carried by said arms, and means carried by said second bar for exerting a pressure against such plate, said pressure means being inclined rearwardly toward the edge of the said blade.

5. In a plate-shaving machine, the combination with a plate-holding bed, a bladecarry ing bar arranged transversely over the bed, a blade secured thereto, and means for moving said bar to cause the blade to opera, tively engage a plate on said bed, of a pair of pivoted arms connected with end portions of said blade-carrying bar and projecting forwardly therefrom, means for locking said arms in operative position, a second'bar carried by said arms and having a downwardly and rearwardly inclined lower surface, and means secured against such inclined surface adapted to press against such plate in close proximity to the edge of the said blade.

6. In a plate-shaving machine, the combination with a plate-holding bed, a bladecarrying bar arranged transversely over the bed, a blade secured thereto, and means for moving said bar to cause the blade to operatively engage a plate on said bed, of two arms movably connected with end portions of said blade-carrying bar and projecting forwardly therefrom, said arms having elonjecting into gated openings in their forward portions, means for locking said arms in operative position, a second bar having its ends prosaid openings, resilient means carried by said arms for supporting the end portions of said second bar, and means carried by! said second bar for exerting a pressure against such plate in advance of and in close proximity to the edge of the said blade.

7. In a plate-shaving machine, the com bination with a plate-holding bed, a bladecarrying bar arranged transversely over the bed, a blade secured thereto, and means for moving said bar to cause the blade to operatively engage a plate on said bed, of two arms movably connected with end portions of said blade-carrying forwardly therefrom, said arms having elongated openings in their forward portions, means for locking said armsv inoperative position, a second bar having its ends projecting into said openings, resilient means carried by said arms for supporting the end portions of said second bar, said second bar having a downwardly and rearwardly inclined surface, and means secured against such inclined surface adapted to bear against such plate in close proximity to the edge of said blade.

lVILLIAM A. FIELD.

bar and projecting