US1641658A - Paper-break detector switch - Google Patents

Description

Sept. @1927. 1,641,658

H. BERGLUND PAPER BREAK DETECTOR SWITCH Filed May 13. 1922 lilll milg N 1 #20 InVentprZ Herman Berglund,

y Mfl w His Attorney.-

Patented Sept. 6, 1927.

UNITED STATES 7 1,641,658 PATENT OFFICE.

HERMAN BERGLUND, OF BROOKLYN, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

PAPER-BREAK DETECTOR SWITCH.

Application filed May 13,

Paper break detector switches have heretofore been provided for opening the control'circuit of the driving motor of a printing press or the like when the web breaks, so

as to deenergize the motor and stop the equipment. In order to again start the equipment and before threading the paper through the press, some arrangement must be provided for restoring the control of the driving motor, despite the operation of the paper break detector switch. Arrangements have heretofore been provided foreffecting this result, but these prior arrangements have been complicated and expensive. H One of the objects of my invention is to provide a paper break detector switch arranged so that when the paper breaks, the switch mechanism will be operated to deencrgize the driving motor and when it is desired to again start up the press, control is restored to the ordinary motor controller by simply raising the finger which writes on the paper out of cooperative relation with the paper and holding the finger in that position by suitable means, as for example, a spring catch. This, and other objects of my invention, as will be in part apparent to those skilled in the art and in part fully explained hereinafter, are accomplished by the paper break detector switch shown in the accompanying drawings which show an embodiment of the invention for the purpose of explaining the features thereof.

Referring to the drawing Fig. 1 is a side view of a paper break detector switch with the finger which writes on the web of paper in its normal position on the web of paper; Fig. 2 is a similar view showing the relative positions of the parts when the paper breaks; Fig. 3 is a top plan view of the switch shown in Fig. 1; Fig. 4 shows the manner in which the finger which writes on the paper and the arm which cooperates with the switch mechanism are held so that the press may be restarted and the paper threaded through the press after the web is broken; Fig. 5 is a very simplified diagram of a system of motor control for the driving motor of the press.

Referring to the drawings, the paper break detector switch therein shown comprises normally closed switch mechanism having a contact disc 10 which is adapted to cooperate with a pair of stationary contacts 11 in the control circuit of the motor. This 1922. Serial No. 560,858.

contact disc is biased to the closed position of the contacts by means of the coil spring 12. The button 13 of insulating material is connected with the disc 10 for the purpose of moving the disc out of engagement with its stationary contacts against the action of the spring 12. The member 14; is pivoted at 15 so as to be biased by gravity to,a position at which the arm 16 will cooperate with the button 13 so as to open the switch'and at long as the web ofpaper is not broken, the

finger 17 will rest onthe'. web ofpaper so as to hold the arm 16 out of cooperative relation withthe button13 fand permit the switch contact discto beheld in its normally closed position. When'the paper breaks as shown in Fig. 2, the member 14 drops due to the bias of gravity and the arm '16 makes engagement with the button 13 so-as to move the disc 10 out of engagement with the stat onary contacts 11. The electromagnetic line switch 20 is thereby deenergized and the motor 21 is disconnected from the source of supply 22. It will be understood by those skilled in the art that in the ordinary equipment for driving a printing press, a controller of some suitable sort will be provided for starting, stopping and regulating the speed of the driving motor 21. I have not shown such a controller and its connections since those skilled in the art will readily supply a suitable arrangement. The pilot switch 23 will then be opened so that when the detector switch is closed, the starting of the motor will be under the control of the operator. In order to restart the motor and thread the paper through the press, all that need be done is to raise the member 14 out of cooperation with the web of paper to the position shown in Fig. 4 at which the spring catch 19 makes a holding engagement with the projection 18. The finger of the member 14 is thus moved out of the way of the paper and does not interfere with threading the paper through the press, and furthermore the contact disc is permitted to assume its normal position in engagement with the stationary contacts 11. The operator may start the press at any time desired by simply reclosing the pilot switch I p The device is neat and compact and cheap to manufacture. The single-casting 24 with,

its cover 25 on which the spring catch 19 is mounted serves as a casing or container for the switch parts and this casting also serves as a couplingor junction for tl'i'e'cablecond'uits 26""a'nd 27 'wliichfprotect"theffwires leading" to the switch. i device is very convenient in' t'ha't ii'hen the pape breaks the, pressin seed do notli'ing"more"than turn the detector arm back until c'aii ht byitsfsp ing 'catch'lihd th is'held in" itjs' rereated e en a er? t iaatl ate and 5 the paper throir'gli. the

rmaecomgmewith the provisions" i gtli'e repieserit'ithebest embodiment thereof but I si i rat nssho'wn is only that the iin eiitioii 'may be 'carried' out by other 'i to' it: understood that the appsmeans.

Whatlcla'im as'new and desire to secure I by Leitters' Patent of aieUnaatsrtrgQ is:

1, A paper break detector switch comprising'ai movablememberfadaptedto rest on the paper; switch mechanismcontrolled rth and 'n eans for holding the sai'd ine'n'l'be'r out of cooperative relationwith the said switch mechanism and .o 'ut'f of engaging [relat on with, the 'ap r.

2. A paper break detector switch comprisingj a pivoted in ember the" free e'pd of which with i the pape "pivoted member having an arm biased to open the saidswitchmeehanism and a finger adapte l' 'to rest o1i the" paper so as to hold the Said arm'ou t of-engagement with the said switch" mechanism 'i'intil the paper brea' xspa prqct on on the said member; and a spring catch cooperating with the said loperationfwithwhe "pa r and the saida'rm o gbr cog eraav'e relation :with the said" i'wtahi'm c a i' w t e-A .iiaiierlifik ete t r s e: p ismg aa aa apse t pr'mf aiua i li' for there 0t arranged to rest an; the; paper, switch mechan sm within the v casing normally out of "cooperative relation with the said arm wli en t'hejarinis hel d by the P PQ n-dama e 9" be "Q Pe at fl y" th said arm 'wl n ciunted "on a fire. papa b ak a tllm an the said, casing cooperating w tn the arm-t0 lioldthegsarne'out ot co e perati ye relation with the said'switeh.

i'e t f n in relati mechanisi In witness' lix her-eo f; I have hereiinto set nd. s 2d ay. o ay, 922..

' H-E BE G U D.

said casing and the other end

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