US1407132A

US1407132A - Finger guard for printing presses

Info

Publication number: US1407132A
Application number: US391315A
Authority: US
Inventors: George H Dufour
Original assignee: Marshall Field & Co
Current assignee: Marshall Field & Co
Priority date: 1920-06-24
Filing date: 1920-06-24
Publication date: 1922-02-21
Anticipated expiration: 1939-02-21

Description

G. H. DUFOUR.

FINGER GUARD FOR PRINTING PRESSES.

APPLICATION FILED JUNE 24,1920.

1,407,132, I Patented Feb. 21, 1922.

6807 e ff fiafazz/j UNITED; stare GEORGE E. nurourt,

COMPANY; or cHIcAGo, gra mar oonronarron'or ILLI-Nors,

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' Application filed 'J'unefl,

To allw hom itmay concern Be it known that I, GEORGE H. Dnnonn, a

citizen of .the- UnitedfStates, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Finger Guards for Printing Presses, of which the following is a specification. This invention relates toaguard'to be associated with a printing press to bar theintroduction of the fingersof' the operator into the path of a" moving part when thepress is in operation. y e

In my application, Serial No. 891,314, of even date herewith, I have described-and broadly claimed a devi'cefor accomplishing this-general purpose.

The present invention accomplishes the same result by mechanism so constructed that the guard member, wh-ile controlled by a swinging'lever which is in turnsubject to a releasable detent, slides to and from barrier position, instead of swinging through an arcuatepath defined by the radius action 25 of the lever and guard together, and there fore occupies a smaller area inits action and better adapts the device for embodimentwith dimensions. appropriate-to larger types of presses.

In the accompanying drawings- Fi ure 1 is a front-elevation' and Fi ure 2 a side elevation of portions or a known type. ofprinting press with which the pres ent invention is immediately concerned.

'1 represents the bed, and .2. the platen which is moved to and from the bedin a pressof known construction; the platen beingmovedby any suitable means, such, for instance, as the drive wheel 3 periodically thrown into driving relation with shaft i and its fly wheel 5 through any suitable means, such, for instance, as a releasing handle orlever 6. v

In. order to prevent the introduction of the fingers of the operator beneaththe platen 2, aguard member 7 is mounted to. assume barrier position in relationtothe space beneath said platen, and this barrier is preferably in the. form. of an apron or" sheet metal. or other suitable material pivoted at 8; upon a controlling lever 9, which is inrturn pivotedat. 9 upon a fixed support softhat by swinging to bring the pivotal. aint; a dfthe guard, member 7'belo'w itsfizied pivot-9, said lever. will present the r ATENT- iorr ca..1

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and it is held against this guide by means of the springlO anchored at 10? upon the fixed pintle 8, and bearing a-tlO against the guard member in the direction to yieldingl-y' urge the guard member against-theguide,

a When it isdesi-redto withdraw the guard 5 member from barrier ;posi'tion,';; as, for: instance, when it is necessaryto change the-. die' or printing. form, lever 9 isswung to the dotted line position of Figure 2 to cause its detent 11- to catch overthe resilient-arm 1-2, a

where the lever will be held with the guard member presented in. the position rem'ote" from barrier ,positionuntildwork upon the press is to be resumed-.;;; To avoidoversight in returning the gua'rd'memberito barrier positiomthe arm 12 iscarried' by orother wise. connected-with the lever- 6, so that in starting'the machine theguard will be. automatically released.

the lever 9 and; the guard 7 will assume barrier-position by gravitation whenever. re leasedfrom the detaining arm .12, itis not necessary that they be so arranged and 'Whi-le in' the specificarrangement shown whether they are or not, itaispreferable to employ means such, for instance, as the spring 9 which, constantly urges the lever 9 in the directiontopresent.. the guard member in'barrierposi'tlon. This sprmgmay be conveniently. arranged upon the ,fixed pintle 9*? ofthe-lever with; one endanchored to said pintle and .the other end engaged over aportionof thelever. e i The guard member 7 willi -normallyassume a position sufiiciently closev to "the bed J l.to prevent introduction ofrthe fingers Lbee neath it while. admitting the card-pr.v other material to be printed, and will remain this position throughout 'th'eiprin'ting opera? am. Asmara-e1- safeguardphgrveyerfithe I guard member is made to yield outwardly from the printing position so that there will be no obstruction to prompt withdrawal otthe'fingers in case they should; engage with the lower edge of the guard in withdrawing the card. plished by the outward swinging of the entire guard member upon its pintle 8 in opposition to its spring 10, but preferably the lower portion of the guard member is made to yield independently of the outwardly swinging movement of the guard member as a whole, and to this end said lower portion is provided with the pivoted gate 13 which will not swing past vertical-position inwardly, but is free to swing from vertical position outwardly. This gate will also yield outwardly in case the fingers are in the path of theuard member while sliding toward barrier position.

15 represents a handle through which to manipulate the guard. 16 is a stop mounted on thepress in position to receive the pin 17 carried by the lever 9 and arrest the latter when the guard member reaches barrier position. The outer end of the stop 5 may carry an adjustable head 18 for regulating the position at which the lever 9 is arrested and since the lever and guard member are so connected as to develop a toggle action, it is obvious that the angle of the lever 9 in its-arrested position will determine the lower limit of travel of the guard member and consequently the space left beneath the apron 13 for introduction and removal of the card.

' "I claim:

1. A guard for printing presses'comprising a guard member sliding to and from barrier position and a position remote from barrier position, a pivoted lever connected with and imparting movement to said guard member and a pivot support for said lever; said guard member being pivoted to said lever at a point removedfrom its pivot supportg'and said lever swinging vertically to bring, its connection with the guard member above and below its pivotal point in presenting the guard member in its two positions aforesaid.

' 2. A guard for printing presses compris ing a guard member sliding to and from barrier position and a position remote from barrier position, a pivoted lever connected wlth and lmpartmg movement to said guard member, and. a pivot support for said lever; sald. guard member being pivoted to said lever at a point removed from its pivot support; and said'lever swinging vertically to This 'may be accom-.

bring its connection with the guard member 3. A guard for printing presses comprising a guard member sliding to and from barrier position and apositior. remote from barrier position, a pivoted lever connected with and imparting movement to said guard member, and a pivot support for said lever; said guard member being pivoted to said lever at a point removed from its pivot support; and said lever swinging vertically to above and below its pivotal point in presenting the guard member in its two positions aforesaid, and having means normally urging its swinging motion in the direction to present the guard in barrier position.

4. A. guard for printing presses comprising a guard member sliding to and from barrier position and a position remote from barrier position, and a pivoted lever connected with and imparting movement to said guard member; said guard member carrying a movable gate that resists movement of the operators hand toward the press and yields to resistance encountered when carried by the guard member toward barrier position.

5. A guard for printing presses comprising a guard-member sliding to and from barrier position and a position remote 'from barrier position, and a pivoted lever connected with and imparting movement to said guard member; said guard member having a gate thereon swinging transversely to the direction of its sliding movement.

6. A guard for printing presses comprising a guard member sliding to and from barrier position and a position remote "from barrier position, and a pivoted lever connected with and imparting movement to said guard member; said guard memberbeing pivoted to said lever; and springs being provided for both said lever and said guard member. which normally tend to swing them in the direction to present the guard member in barrier position. I

7. A guardfor printing presses comprising a guard member sliding to barrier position and a position remote from barrier position, a pivoted lever connectedfwith and imparting movement to said guard member, 115 means normally urging the lever'in the di-' rection to present the guard. member in barrier position, and an arresting stop against which the lever impinges after bringing the guard member within reach of said barrier 12 position. p

8. A finger guard for printing presses comprising a guard member sliding to and 7 from barrier position, a pivoted lever upon which said guard member is pivoted at 125 a point removed from the pivot of the lever and which develops with said guard member a toggle action, and by such toggle action projects the guard member to its barrier position, and a stop which determines 13g the angle of throw of the lever and therefore the barrier position of the guard memher.

9. A guard for printing presses comprising a guard member sliding to barrier position and a position remote from barrier position, a pivoted lever connected with and imparting movement to said guard member, means normally urging the lever in the direction to present the guard member in barrier position, and an arresting stop against which the lever impinges after bringing the guard member within reach of said barrier position; the guard member having a movement upon said lever; and said movement being free from the control of said stop.

10. A guard for printing presses comprising a guard member sliding to and from barrier position and a position remote from barrier position, and a pivoted lever connected with and imparting movement to said guard member, having a releasable detent for retaining it with the guard member in said remote position; said guard member having means urging a swinging movement thereof upon the lever toward guard position, and having a guide upon which it slides and against which it is held by said last-named means.

11. In a hand fed printing press, a guard sliding transversely to the line of feed to and from guarding position, a guide upon which said guard slides, and means acting against the guard to press it against the guide. 4 I 4 12. In a hand fed printing press, a guard sliding transversely to the line of feed to and from guarding position and also having a swinging movement away from guarding position in the direction of withdrawal'of the feeding hand, and a guide defining the sliding path of the guard.

18. In a hand fed printing press, a guard: sliding transversely to the line of feed to and from guarding position and also having a swinging movement away from guarding position in the direction of withdrawal of the feeding hand, a guide defining the sliding path of the guard, and means yieldingly holding the guard against said guide.

Signed at Oak Park, Illinois, this 21st day of June, 1920.

GEORGE H. DUFOUR