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Publication numberUS557018 A
Publication typeGrant
Publication dateMar 24, 1896
Filing dateOct 4, 1895
Publication numberUS 557018 A, US 557018A, US-A-557018, US557018 A, US557018A
InventorsFriedricii Philipp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 557018 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)


Patented Mar. 24, 1896.



Patented Mar. 24,1896.






SPECIFICATION forming part Of Letters Patent No. 557,018, dated March 24:, 1896.

Application filed October 4, 1895. Serial No. 564,646. (No model.)

To all whom it may concern.-

Be it known that I, FRIEDRICH PHILIPP, a citizen of the United States, and a resident of New York, in the county and State of New York, have invented certain new and useful Improvements in Punching-Machines, of whichthe following is a specification.

My invention has reference to improvements in punching-machines, and has for its purpose to provide a machine to facilitate the manufacture of keys for pianos and organs.

The piano and organ keys-the long or socallec natural as well as the short or socalled sharp keys-are sawed out of a blank of wood, so that all keys have a uniform thickness and length. Up to this time the longitudinal cuts to separate the keys longitudinally from each other were made by means of a band or scroll saw, and the small cuts to separate the short or sharp keys from the long keys were made by hand with a chisel. The latter manipulation is very troublesome and requires much time, which disadvantage is done away with by my improved punching-machine, which is illustrated in the accompanying drawings, in which Figure 1 is a side, and Fig. 2 a front, elevation of the machine. Fig. 3 represents a front View of the chisel-holding carriage, and Fig. {l a side view of the same. Fig. 5 is a section on line 5 5 of Fig. 3. Fig. 6 shows a blank for the piano-keys, and Fig. 7 is a section on line 7 7 of Fig. 6.

Similar letters of reference indicate corresponding parts.

A in the drawings represents the frame of my machine, in the standards of which a shaft (0 is journaled, which receives rotary motion in the usual manner by belt and pulleys from any suitable power-generator. The shaft a has a cog-wheel a, that meshes with two cog wheels a a journaled in one of the standards of the machine above and below, respectively, the cog-wheel a. Each of the cog-wheels a engages a cog-wheel Z), which cog-wheels b are keyed on shafts b, also journaled in the standards and having on their ends projecting through the said standards a crank-arm b so that as soon as rotation is imparted to the main shaft a four crank-arms b are simultaneously put in rotary motion.

The standards of the machine are recessed,

as clearly shown in Fig. 2, and the portions of the standards above and below the recesses have horizontal guide-grooves,in which carriages O slide, as shown in Figs. 3 and 4. To these carriages up and downward motion is imparted by connecting-rods c, which are pivoted to the said carriages with one end and with the other end attached to the crank-arms The said crank-arms are slitted, as shown in Fig. 3, and the connecting-rods c are provided with pins 0, which project into the slits of the crank-arms and follow, when the shafts b are rotated, the rotating motion of the crank-arms, and consequently move the carriages in their guide-grooves up and down.

The carriages are provided with set-screws d, which are screwed into the front portions of the same and serve to hold the chisels or knives D. The latter have, for this purpose, slits d through which the set-screws (1 pass, and when screwed down into the bodies of the carriages press upon the chisels or knives and hold them firmly in position, as shown in Figs. 4 and 5. It is evident that by means of the said set-screws d the chisels can be adjusted on their respective carriages to any desired length, so that when they are moved up or down cuts of any desired depths into wood or other blanks can be produced.

In the machine shown in the drawings the chisels on the carriages are so located that those on the upper carriages are right opposite those on the lower carriages, but the chisels may be arranged otherwise according to the cuts required.

Instead of five chisels on each carriage, as shown in the drawings, less or more chisels may be attached to and'operated by the carriages. The latter are furthermore provided with horizontal brackets 6, through which vertical screws 6' pass, which can be so set that they abut against the bases of the chisels and serve as supports for the same, so that they are more reliably held on the set-screws cl and cannot be brought out of their positions by the force of the strokes exerted by the same on the material to be punched. Laterally to the standardstables E are attached in any required manner to support the material to be punched.

My improved punching-machine works in the following manner: Wood boards or blanks cuts are obtained.

F, on which the keys to be punched and sawed out are marked and divided into octaves by means of marking-holes f, (the space between two holes making one octave,) are placed on the tables E and pushed into the recesses in the standards of the machine until the pins g in the recesses are located in the said holes f. Rotary motion is thenimparted to the main shaft a and like motion trans mitted from the cog-wheel a of the same to the cog-wheels a a and from these by the cog-wheels Z) Z) to the shafts Z) 1) bearing the crank-arms 12 11 as explained before, it being understood that when the blanks 1 are in the required positions in the said recesses the shafts b are in such positions that the crankarms 011 the lower shaft point downward and the crank-arms on the upper shaft point upward. By the rotary motion imparted to the said shafts b the crank-arms are swung up and down respectively, and the counectingrods, swiveled to the same, simultaneously moved in the same direction, whereby the carriages, which are pivoted to the connecting-rods, are shifted in the guide-grooves respectively up and down and the chisels on the carriages pierced into the blanks, thus producing the cuts h, Figs. 6 and 7, into the same. The vertical supporting-screws c, which abut against the lower ends of the chisels, prevent the latter from being removed out of their positions when the strokes are exerted upon the blanks, so that always even \Vhen the shafts Z7, with their crank-arms, are rotated further the carriages are moved in an opposite direction and the chisels withdrawn from the blanks. In the meantime the blanks are released from the pins g and moved on until the pins reach the next holes f, whereafter the described operation is repeated. \Vhen the whole blank is punched in the described manner the longitudinal cuts are made into the same by means of a band or scroll saw and the short or socalled sharp keys broken off from the long or so-called natural keys.

The chisels or knives may be arranged in any other way, as said before, so that my machine may also serve other purposes and can be used for punching any other articles out of wood as well as of metal.

Having thus described my invention, I claim as new' and desire to secure by Letters Patent- 1. The combination of a rotary main shaft bearing a cog-wheel, with secondary rotary shafts having crank-arms and being in rotary connection, by means of cog-wheels, with the main shaft, carriages having adjustable chisels and sliding in guide-grooves in the frame of the machine, the carriages being connected with the said cranlcarms by means of 0011- neoting-rods, so that by the rotation of the shafts the carriages are simultaneously moved to and from each other, substantially as set forth.

2. In apunching-machine, the combination of the frame having inwardly-extending recesses, with a rotary main shaft, two secondary rotary shafts, one above and the other one below the said recesses, the secondary shafts being connected with the main shaft by means of cog-wheels, crank-arms attached to the secondary shafts, connecting-rods attached to the crank-arms, and carriages pivoted to the connecting-rods and sliding in the frame toward and from each other, the carriages bearing adjustable chisels and vertical screws which latter abut against the said chisels and support the same, substantially as set forth.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2825402 *Oct 4, 1955Mar 4, 1958Wuppermann Gmbh TheodorFlying shears for cutting of continuously moving rolled material
US3104573 *Sep 28, 1959Sep 24, 1963Minnesota Mining & MfgReciprocable die mechanism including cooperating ejector means operative to halt the die movement
US3156966 *Feb 24, 1961Nov 17, 1964Western Electric CoArticle handling and welding apparatus
US6314852 *Aug 3, 1998Nov 13, 2001International Business Machines CorporationGang punch tool assembly
US6389940Jul 16, 2001May 21, 2002International Business Machines CorporationGang punch tool assembly
Cooperative ClassificationB23D15/02