US1203951A - Braking mechanism for presses. - Google Patents

Description

H. A. W. WOOD.

BRAKING MECHANISM FOR PRESSES. APPLICATION HLED MAR. 6. I912. RENEWED APR. 12. 1916.

37 5 heavy/for: mas/16.1 fig; Wm?

8% mew.

anon.

HENRY A. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, T0

WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORA- TION OF VIRGINIA.

BRAKING MECHANISM FOR PRESSES.

Specification of Letters Patent.

Patented Nov. "7, 1916.

Application filed March 6, 1912, Serial No. 681,921. Renewed April 12, 1916. Serial No. 90,775.

to provide a quickly acting and simply constructed braking mechanism which is ca pable of checking simultaneously all the couples of a multiple deck press so as to avoid the difficulties ordinarily encountered in stopping web presses of this type; to provide means for connecting the several impression cylinders with the power in such a way that any one of the cylinders can be disconnected simply and readily from the power without affecting the transmission of power to any of the other cylinders.

Reference is to be had to the accompanying drawings in which Figure 1 is an end elevation of a portion of a multiple deck rotary web printing press with a braking mechanism constructed in accordance with this invention; Fig. 2 is a sectional view thereof showing the braking mechanism mainly in elevation; Fig. 3 is a longitudinal central sectional view on enlarged scale of the connections at one end of one of the impression cylinders; Fig. 4: is an enlarged sectional view of the operative ends of the brake band.

In the operation of web presses of the multiple deck type a serious difliculty has been encountered heretofore owing to the fact that when the press is stopped a brake at the driving end of the machine is always applied. This results obviously in slowing up the machine from the power end so that the several decks, which are operated from the power through a series of gears, do not stop absolutely simultaneously but the one farthest from the power will get the effect of the brake later than the one nearest the power, due to the back lash. Owing to this fact in part at least, the stopping of these presses has to be carried out very carefully in order to avoid the braking of one or more of the webs and even the stripping of the gears. This necessitates the operation of the machine by a skilled mechanic and also results in the loss of some little time every t me the machine is stopped. This invention is designed for the purpose of overcoming these difiiculties, permitting the machine to be operated by a man of less skill, and avoiding the web breaks and gear stripping which sometimes occur even in the best operated plants.

The invention is shown as applied to a multiple deck rotary web printing press having a frame 10, a series of impression cylinders 11 and printing plate cylinders. In this type of press the power is transmitted through gearing 13 to a gear 141 ro tatable on the same aXis as one of the impression cylinders, that is, on the shaft 15. This gear meshes directly with another gear 14: preferably of the same size and 011 the same axis as another one of the impression cylinders. All the couples are operated in the same Way by a series of these gears. Each of the impression cylinder shafts is provided with a gear 16 meshing with another gear, 17 on the printing cylinder shaft (not shown) and driving the printing cylinder (not shown) preferably at the same surface speed.

In order that each of the gears lat may be driven at all times when the machine is in operation whether all the decks of the press are operating or not, these gears are shown as mounted loosely on the several impression cylinder shafts 15 by means, in the present instance, of a bushing 18. For the purpose of connecting each of these gears with its impression cylinder shaft 15, the following mechanism is shown. A hub 19 is keyed to each impression cylinder shaft 15 adjacent to the gear 14. One face of this hub is provided with one or more sockets 20 shown as having linings 21. A corresponding number of plungers 22 are mounted in the face of the gear 14 and each is controlled by a screw '23 having a pair of collars 24E thereon on opposite sides of a perforated ring plate 25 fixed to the opposite side of the gear 1 1. By turning these screws the plungers can be forced in or out and the gear connected with or disconnected from the hub and therefore the impression cylinder. This hub also has another function, as it is used as a brake hub. For this purpose the frame is provided with a pin extending into an annular recess 31 in each of these hubs. On each of these pins is hung a split brake ring 32. The free ends of this split brake ring are operated by a non-circular operating member 33 shown as square in cross section. This member is a projection from a shaft 3% which is mounted to oscillate in a bearing on the frame. It is secured in position at one end by a nut 35 fixed by a pin 36. On the other end between the frame and brake hub is an arm 37 fixed with respect to the shaft 34. The arms of these several brake operating mechanisms extend laterally from the brakes parallel with each other. Each one is connected with a reciprocating rod 39 arranged parallel with the plane of the axes of the several impression cylinders. The connection between each arm and this red preferably is made through a pair of collars l0 fixed to the rod and connected with the end of the arm by springs 41. The .rod. 39 is connected with a piston 42 in a cylinder 43 adapted to be operated by steam,

compressed air, water or any other medium, or a solenoid. 1

The operation of the device is very simple. All the screws 23 of the impression cylinders which it is desired to operate being turned in the direction to force the plungers outwardly, the power will be transmitted through the several gears 1% to each of the impression cylinders so connected. If any of these cylinders are disconnected it will make no difierence in the transmission of power to the others. When it is desired to stop the press the usual stopping mechanism (not shown) is operated, and at the same time or preferably slightly before, the fluid is introduced into the cylinder 43 to operate the piston so as to turn the several shafts 34.- and separate the free ends of the brake rings 32. On account of the spring connections 41 this operation, although performed simultaneously on each impression cylinder, will take effect in such a manner as to accommodate the conditions under which it is operated. In this way the several printing couples can be slowed down simultaneously but independently when the press is stopped, thus saving some time and providing for the same action on all the couples. This also equalizes the stopping strains among the several couples so that none of the webs is likely to be broken.

Although I have illustrated and described a preferred embodiment of the invention as applied to only one type of press, I am aware that many modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. There fore I do not wish to be limited to the details of construction or the particular type of press herein shown and described, but

WVhat I do claim is-:

1. In a multiple deck printing press, the combination with a plurality of impression cylinders for the several decks of the press, a train of gearing for driving one of said cylinders at one end of the series, gears on each of said cylinder shafts, said last named gears meshing directly with each other in series, each of said gears being rotatable independently of the cylinder which it operates, and means for retarding the rotation of each cylinder independently of its gear and independently of the other cylinders.

2. Ina multiple deck printing press, the combination with a plurality of impression cylinders, means for driving one of said cylinders, and means for driving the rest of the cylinders in series from the first one, of means arranged between thedriving mechanism and each cylinder for retarding the rotation of that cylinder independently of the driving mechanism and of each other.

3. In a printing press, the combination with an impression cylinder, of a brake hub rotatable therewith, a brake band for the hub, an operating member for the brake band having an arm thereon, a rod for operating said arm, and yielding connections on both sides of the arm for connecting it with the rod.

at. In a printing press, the combination of a reciprocable operating rod, an oscillatable arm extending toward the rod, a spring on each side of the free end of the arm, each of said springs being connected with the rod, a non-circular brake operating member fixed with respect to the arm and oscillatable on the same axis as the arm, and a brake band in posit-ion to be operated by said operating member.

5. In a printing press, the combination with an impression cylinder, of a brake hub rotatable therewith, a brake band for'the hub, and means for operating said brake band to grip the hub, said means comprising a cylinder, a piston therein, an oscillatable arm connected with said piston to be operated thereby, and yielding connections between the piston and arm on both sides of the arm.

6. In a printing press, the combination with an impression cylinder having a brake hub on the shaft thereof, means engaging said brake hub for retarding the rotation of the cylinder, means for operating said retarding means, a gear rotatably mounted onthe shaft of the cylinder, and means for positively connecting the gear with the brake hub, and disconnecting it therefrom at will.

7. In a printing press, the combination with an impression cylinder having a brake hub on the shaft thereof, a gear rotatably mounted on the shaft of the cylinder, and means for connecting the gear with the brake hub to rotate it therewith constantly, and for disconnecting it therefrom to allow the gear to rotate constantly Without turning the hub.

8. In a printing press, the combination with an impression cylinder shaft, of a hub fixed on said shaft and having a socket therein, a driving gear rotatable on said shaft and having a plunger provided With a reduced frangible end adapted to enter said socket, and means for positively adjusting said plunger into and out of the socket.

9. In a printing press, the combination with an impression cylinder shaft, of a hub fixed on said shaft and having a socket therein, a driving gear rotatable on said shaft and having a plunger adapted to enter said socket, a ring plate on the gear having perforations therethrough, and a screw arranged in each perforation having collars 011 both sides thereof, and adapted to be screwed into one of said plungers.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing Witnesses.

HENRY A. WISE WOOD.

Witnesses:

FLODWEN W. JoNEs, LILLIAN C. JONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washingtoml) G.

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