US567259A - Presses - Google Patents

Description

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A. K. TAYLOR. l AUTOMATIC TRIP MEOHANISM PUR PRINTING PRESSES.

Nm-561,259. y Pafented s e-pt. 8, 18.96.."

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'UN IT-ED STATES 4PATENT OFFICE.

, ARTHUR K. TAYLOR, OE WILMINGTON, DELAWARE, AssICNOR To THE ECONOMIC MACHINE COMPANY, OE NEW YORK, N. Y..

AUTOMATIC TRIP IVIECHANISIVI FOR PRINTING-PRESSES.

SPECIFICATION forming part of Letters Patent No. 567,259, dated September 8, 1896. Application filed February 10,1896. Serial No. 578,677. (No model.)

To LZ2 whom, t may concer/1,.

Be it known that l, ARTHUR K. TAYLOR, a citizen of the United States, residing at iVilmington, in the county of New Castle and State of Delaware, have invented new and useful Improvements in Automatic Trip Mechanisms for Printing-Presses, of which the 4fol-` lowing is a specification.

The object of my invention is to construct a sensitive and reliable trip mechanism for rendering inoperative a printing press or other machine to which sheets of paper are fed, except when a sheet of paper is properly presented to the feeding or gripping devices.

In the accompanying drawings, consisting of four sheets, Figure 1 is a fragmentary side elevation, partly in section, o f a printingpress provided with my improved trip mechanism. Fig. 2 is a transverse view of a portion of the mechanism illustrated in Fig. 1. Fig. 3 is a side elevation, on an enlarged scale, of the trip mechanism, showing the position of the parts during the normal operation of the press. Figs. 4 and 5 are similar views showing two positions of the trip mechanism preparatory to stopping the press. Fig. 6 is a fragmentary transverse section, on an enlarged scale, of the trip mechanism. Fig. 7 is a bottom plan view of the same. Fig. 8 is a sectional side view, on an enlarged scale, of the guide or detector lever and connecting parts. Fig. 9 is a detached view of the adjustable contact-bolt. Fig. 10 is a front view of the detector-lever. Fig. 11 is a bottom plan view of the same. Fig. 12 is a fragmentary sectional elevation of the detectorlever, showing a modiication of the Contact devices. Fig. 13 is a front elevation of the same. Fig. 14. is a bottom plan view-of the same. Fig. 15 is a detached side elevation of one of the contacts. Figfl is a front view of the same. Fig. 17 is a diagram illustrating the electric circuit.

Like letters of reference refer to like parts in the several figures.

In Fig. 1 is represented in dotted lines a portion of an ordinary'form of reciprocating 'bed and cylinder-press, the operation of the Vimpression-cylinder being controlled by a clutch A, adapted to be actuated bya clutchfork a, while the operation of the feeding devices is controlled by another clutch A', which operates the pins of the tumbler-box in the usual Inanner and which is adapted to be actuated by an arm a. The clutch-fork a is carried by a rock-shaft d2, having an arm d3, connected by a rod a4 to a vertically-reciprocating 'slide a5, which latter is guided on the main frame and acted upon by springs d, tending to raise it. The rock-shaft a2 has another arm a7, which is connected by a rod as to a bell-crank lever a", the latter being connected by a rod d10 to an arm au on a horiing devices are in operation, but when said slide a5 is depressed the clutches will be disengaged and the impression-cylinder and feeding devices are rendered inoperative.

In order that the operation or tripping of the press may be rendered dependent upon the presence or absence of a sheet of paper in proper position to be caught by the feeding devices of the press, I employ mechanism which l- Will noW proceed to describe.

On the slide a5 is a pivoted catch or trigger b, which is normally held in the retracted position shown in Fig. 3 by means of a spring b', and to this trigger b is pivoted a supplementary trigger or toe b2, the upper end of which is normally held in.a retracted position by meansfof a spring 118, the toe b2, however, being capable of a limited independent movement on the trigger b to an extent liniitedby the contact of said toe with the stop b4 on said trigger Z). Y

To suitable guides on the same frame which carries the slide a5 is adapted another slide d, to which, during the operation of the press, a constant vertical reciprocation is imparted by reason of the engagement of an antifric.- tion-roller d at the upper end of the slide d with a cam-groove d2 on the horiZontally--reciprocating bed of the press. The Alower end of the upper slide'd is providedwith an inclined or beveled face D, which is adapted Ioo eye on the'lower end of a bolt f3.

to engagewith the toe or trigger of the lower slide for coupling the two slides together.

A pin d3 on the slide d is connected by a rod d4 to a horizontally-movable slide d5, suitably guided in a plate d of the xed frame, said slide d5 carrying an electromagnet (ZT.

Hence as the slide d reciprocates in a verti-A cal plane the slide d5 will be reciprocated in a horizontal plane and the magnet (Z7 will be caused to approach and recede from the toe d2, which latter serves as an armature for the magnet.

The upper slide is preferably connected with the main frame by a spring D2, which constantly tends to raise the upper slide and normally holds the slide in its highest position, so Ythat the roller d upon leaving the cam-groove d2 during the forward movement Lofvvtlfe'bed will be in the proper position to again engage with said groove during the subseguentbackward movement thereof.

4 Suitably pivoted adjacent to the impressioncylinder is a detector or guide lever f, (see Figs. 8 to.`1l,) this detector-lever consisting of an Iarm provided'at its front end with a downwardly-projecting front guide F. f is a plate which is pivoted with its upper ,end tothe front side of the front guide, and

which isprovided with afinger f2, projecting rearwardly through an opening in the guide `Fand normally resting in contactwithan y The upper endl of this bolt is threaded and engages with `.'anu't f4, mounted between two lugs on the backy ofthe front' guides F, so that by opervatingqsaid nut the bolt f3 can be adjusted `vertically as desired.

` vThe electromagnet Z7 is contained in a circuit, of which t-he. bolt f3 constitutes one terminal and the plate f the other terminal, as

`Hence whenever the iinward the depending portion of the arm f the iinger f2`will be lifted from contact with the eye of the bolt f3 and the circuit will be `broken and the magnet thus rendered inactive.l

The movement of the electromagnet toward and from the armature of the trigger is so timed that it stands in working proximity to thetrigger when a sheet is supposed to be ,present at the front guide and the circuit is expected to be broken by the engagement of the front edge of the sheet against the pivoted plate f', but the magnet is removed from ,the vicinity of thetrigger at all othertimes. ,Whem therefore, a sheet of paper is properly Aedto theimpressionfeylinder, the front edge lof ythe sheet yof paper will engage with the .lower portion of the Vplate f and move the same forward, thereby breaking the circuitv and preventing themagnet, which at this time stands close to the trigger, from attractingthe latter. In this manner the reciproeating magnet will always be deenergized as it approaches the trigger `during the normal operation of the press, and the toe and trigger will both remain retracted out of the path of the reciprocating upper slide, so that the lower slide remains at rest in its elevated lposition and vholds the clutches ofthe impression-cylinder and feeding device in their coupled position. 4

If no sheet has been presented to the front guide, or if a sheet has not been placed properly against the front guide so as to break the circuit, the magnet remains energized as it approaches the trigger and attracts the armature of the same, thereby carrying the upper end of the trigger underneath the i11- clined or beveled lower face D of the upper slide d, as shown in Fig. 4:. vThe outward movement of the toe b2, which is begun by the action of the magnet C17, is continued by the action of the beveled lower end ofthe slide d, and such movementis communicated to the trigger I), as shown in Fig. 5, owing to the fact that when the toet2 is moved to the position shown in Fig. et it has a rigid bearing upon the shoulder b4 of the trigger b, and hence becomes in effect arigid projection of said trigger and imparts to the latter any outward movement which it may receive.

After the trigger has been directed by the magnet underneath the inclined or beveled face of the uppervslide the latter during its descent moves the trigger laterally without .effecting the lower slide until thetrigger envthe upper slide is transmitted 'tothe lower slidev andfrom the latter by the intermediate mechanism tothe clutches for tripping the impression-cylinder andfeeding devices and rendering the same inoperative. The arm a', which connects with the gripper-clutch A, acts upon the pins which enter the tumblerbox on the end of the gripper-shaft in a wellknown mannen The fork a connects with the clutch A of the bed and thereby operates the ordinary trip mechanism which lis commonly used on two-revolution presses and which sets in motion mechanism which lifts the cylinder, so that the type will not touch the paper. Then the mechanism is organized as hereinafter described, the presscontinues to r'un,'but refuses to printv or to take the sheet from the feed-table until it is so fed that the sheet touches the guides and'breaks the circuit.

As the upper end of thetrigger h is moved outward by the action of the beveled lower end of the slide d the magnet Z7 is withdrawn by the retraction of thevslide d5, said magnet resuming its normal position as the slide d rises. rlhe magnet @Z7 might be strong enough to pull the trigger l) directly into engagement with the lower end of the slide d, ybut by the use of the lighter toe b2 the work of the magnet is materially lessened and the apparatus is rendered operative with the use of a much IOC IIO

weaker current than would otherwise be re` quired.

In Figs. l2 to 16 I have illustrated a modifiedY form of circuit-breaking device in which a spring-plate c' is mounted upon the front side of the front guide and carries at its lower end an inwardly-proj ectin g hooked contact-finger t', which is adapted to contact with a terminal plate 'i2 on the back of said depending portion of the arm.4 Each of the plates i and 712 is preferablyT made of spring metal and secured at its upper end to the front guide by pins i? 4, arranged vertically in line. The lower end of the front plate is adjusted toward and from the lower end of the rear plate by an adjusting-screw t5, arranged in .a screw-threaded opening in the front guide and engaging with the springplate 't' between its supporting-pins, so that by turning the adjusting-screw in the proper direction the portion of the plate between the pins will be deflected more or less and the lower end of the plate c' shifted accordingly. The lower end of the rear springplate i2 is in like manner adjusted by an adjustingscrew 6, engaging with a screwthreaded opening formed in the rear springplate between its supporting-pins and en gaging with its end against the front guide. When the lower end of the plate z' is carried forwardly by the action of the paper, the contact-plates c" 712 will be separated and the circuit broken, but when the lower end of the plate 'i is permitted to remain projected the plates c" 'i2 will remain in contact and the circuit will be complete.

The detecting device may be so located that its trip-plate will engage with the sheet of paper at any desired point. Thus if a single detector is used it may be located midway between the opposite edges of the sheet, or if a pair of detectors are used one may be located near each edge of the sheet and the circuit may pass through both detectors, so that both detectors plates will have to be depressed in order to break the circuit, the result in this case being that the press will be tripped either when no sheet is presented for the action of the printing devices or when the sheet self specifically thereto, since many modifications of detail may be made without departing from the main features of my invention.

I therefore claim and desire to secure by Letters Patent- 1. The combination with two normally-disengaged parts of the tripping mechanism of a printing-press or other machine to which sheets of paper are fed, one of which parts is normally reciprocated by engagement with some moving part of the press while said other part is lnormally at rest, of a catch or trigger carried by one of said parts and adapted to couple the same to the other part, an electromagnet for operating said catch or trigger, mechanism whereby said electromagnet is moved toward and from said catch or trigger to bring the magnet alternately within operative distance of the same and remove it therefrom, and a circuit-breaker which is acted on by the sheet, substantially as set forth.

2. The combination with two normally-disengaged parts of the tripping mechanismof a printing-press or other machine to which sheets of paper are fed, one of which parts is normally at rest, of a catch or trigger carried by one of said parts, provided with an armature and adapted to couple both parts together, an clectromagnet for operating upon said armature and catch or trigger, mechanism whereby said electromagnet is moved toward and from said armature to bring said magnet alternately within operative distance of said armature and remove it therefrom, and a circuit-breaker which is acted on by the sheet, substantially as set forth.

3. The combination with two normally-disengaged parts of the tripping mechanism of a printing-press or other machine to which sheets of paper are fed, one of which parts is normally reciprocated by engagement with some moving part of the press while said other part is normally at rest, of a catch or trigger adapted to couple said parts together and mounted on the part which is normally at rest, an electromagnet for operating said catch or trigger, and a circuit-breakerwhich is acted on by the sheet, substantially as set forth.

4. The combination with two normally-disengaged parts of the tripping mechanism of a printing-press or other machine to which sheets of paper are fed, one of which parts is normally reciprocated by engagement with some moving part of the press while said other part is normally at rest, of" a catch or trigger adapted to couple said parts together and mounted on the part which is normally at rest, an electromagnet for operating said catch or trigger, mechanism whereby said magnet is moved alternately toward and from said catch or trigger, and a, circuit-breaker which is acted on by the sheet, substantially as set forth.

5. The combination with two slides, one normally at rest and connected with the trip mechanism of the press and the other reciprocated by some moving part of the press, ofv a catch or trigger adapted to couple saidparts together and mounted on the part which is normally at rest, an electromagnet which is reciprocated toward and from said catch or trigger in a direction which does not coincide with that of said reciprocating slide and a circuit-breaker which is acted on by the sheet, substantially as set forth.

6. The combination with two slides, one

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normally at rest and connected with the trip mechanism of the press and the other reciprocated by some moving part of the'press, of a catch or trigger adapted to couple said parts together and mounted on the part which is normally at rest, an electromagnet moving on Ways arranged at right angles to these Ways of the reciprocating slide, a link con necting said reciprocating slide With said magnet and a circuit-breaker Which is acted on by the sheets, substantially as set forth.

7. The combination With tWo slides, one connected to the trip mechanism of the press and the other reciprocated by engagement with some moving part of the press, of a catch or trigger carried by one of said slides, a pivoted toe mounted on said catch or trigger, an electromagnet acting on said pivoted toe so as to draw it into engagement With the other slide, and a circuit-breaker acted on by the fa Y567,259

fitness my hand this 3d day of February, 1890.

ARTHUR K. TAYLOR. Witnesses:

WINFIELD H. SMITH, EDWARD T. PRICE.

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