US1673222A

US1673222A - Electrical safety trip

Info

Publication number: US1673222A
Application number: US218334A
Authority: US
Inventors: Bonebrake Ray
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-09-08
Filing date: 1927-09-08
Publication date: 1928-06-12
Anticipated expiration: 1945-06-12

Description

June 12, 1928.

R. BONEBRAKE ELECTRICAL SAFETY TRIP Filed Sept. e, 1927 2 Sheets-Sheet 1 Invgntor q T l Attornev June 12, 1928. 1,673,222

R. BONEBRAKE ELECTRICAL SAFETY TRIP Filed Sept. 8,, 1927 2 Sheets-Sheet 2 Patented June 12, 1928.

BAX BQNEBRAKE, OF SOUTH \VHITLEY, INDIANA.

ELECTRICAL SAFETY mane.

Application filed September. 8, 1927. Serial No. 218,334. I

My invention relates to an electrical safety trip mechanism and the same has more I particular reference to a safety trip for use in conjunction with book binding machines.

This mechanism is particularly adapted for installation on certain types of machines, wherein the book sections pass through the process of gathering, stitching, gluing and. covering stages.

Not only in this typeof machine, but in all types of book binding machines, 'considerable difficulty has been experienced in the irregular carrying of the book section upon the various conveyors. In the production of large catalogues and other magazines, the same are constructed of a group of sections,'each section comprising a uniform number of pages.

"These sections are usu-sally placed upon a platform provided for the purpose, and in turn are caught'by-a gripper arm and placed upon an endless conveyor for movement-toward the stitcher. In, this line of travel, the book:sections'frequently havektheir end portions, or corners, curled against theside walls of the conveyor; In this condition, the book sections pass'onto the stitcher where they are stitched in their defective con dition.

Not onlyarebooks produced in this manner with defective sections, but not infrequently, serious damage is done to various parts of thejbook binding machine.

the electrical An object of-my safety trip mechanism is to entirely eliminate any possibility that these defective sections will find their way into finished catalogued magazines, the main purpose being to remedy this situation immediately upon its occurence.

Another object is in having my safety trip mechanism fool-proof, in that the book sections are compressed by a presser bar prior to their passage untlermy trip device.

Still another object resides in the novel arrangement and construction of parts I have provided for instantaneously breaking circuit and stopping the machine.

A further ob'ect lies in the convenient way in'which-t is --mechanism may be applied to any part of an endless conveyor, requiring buta minimum of space and necessitating but lit-tle'labor and'time.

Other objects and advantages willbecome apparent as the novel construction of myinvention is better understood from the specification and claims 110 follow.

In the drawing QFigure lis afront-elevation ofmyelectrical trip mechanisn'i'showing the same ap plied to the side wall of an endless con veyolf, the same further showing book sections on the endless conveyor and the presser bar of my mechanism in contact with one of the book section. I

Fig. '2 is a sectional view through the circuit breaker housing of my mechanism, showing the contact of the breaker in closed position, and 7 Fig. '3 's a perspective view of the con-. struction as shown in Figrl.

For a more detailed description of my invention, I will now refer to the drawings, in which'like numerals'designatelike parts of myinvention. I

-An endless conveyor or other conveyingv means 1 of conventiona l construction, isen' s 1 ployed upon which 315 conveyed the same book sections A to "the stitcher, gluer 'and covering operations of, the bookbinding machine.

This endless conveyor is also 'provided with'aside wall 2 which is shown in Fig. 3, and on Which-my electrical trip mechanism 'is mounted. Letter 'B'represents a plate of suitable shape having elongated ribs 3 and extending longitudinally 4 respectively, from the {lower edge of the plate fora substantial distance. f

The plate is further formed-with longitudinal slots 5 and 6 andf7'respectively. .A

lug 8 projecting outwardly, is also provided onthe face of the'plate adjacent one side edge andintermediate the length of same.

A. rocker; arm-'9 "havingfthe lower portion thereof of a curved contour, is adapted .to

pivot on a threaded pin 10. The threaded pin 10 is provided with a suitable nut threaded thereon at the opposite side of the plate '13, which is not shown in the drawing and the same is adapted for slidable adjustment within the slot 7. I v

The curved portion of this arm adjusted below the pivot pin, is adapted to abut the rib 1- on the plate, to limit the downward movement of the trip plate 11 formed at the lowerextremity of the arm. The upper exnally threaded opening,

tremity of the arm is formed with an interthrough which is threaded an adjusting with a suitable cam nut 13 for receiving the ,ad'usting screw in a desired position.

ivoted adjacent the top of the plate 13 is'a lever 14 formed with an enlarged head portion 15 in which is located anarcuateshaped slot 16. Freely movable within this,

slot 16 is a pin from which depends the rod 17. When the trip mechanism is in set position, the lower extremity of this rod 17 is jamb nut adapted to rest on the lug 8, in close proximity to, the extremity of the adjusting screw Extending beyond the pivot point of lever 14 isa finger 18 formed atits free end portion withan' outward benda Bar'section 19 20 to the lower part of the plate, Pivoted; in.

pivoted at is formed witha yoke head 21.-

this yoke is alink bar 22 which pivotally connectsv the bar, section 19, the switchplnnger'23; The switch plunger is internally threaded at its opposite end into which an any desired shape, in which is located at, the

top inner side, an insulating plate 31,] se cured in a suitable manner. Carried by this insulating plate 31, are a pair of contact blocks 32 in direct overlying positionwith contact blocks 28. 1

Suitable conductor wires 33 are connected wit-lithe proper electricalmotive power of the machine. The presser barg iformed at one end with a suitable plate 35 is adapted for adjustment within the-slot 5. The pin 36 upon which the presser bar. is'allowed to pivotis providedwith a spring S'T for normally maintaining'the presserplate 35 in tensioned' relation with the book section A. as a pass thereunder, upon the. conveyor 1.

Threaded bolts extend through the, side wall 2,.of the conveyor and through the slot 6 inplateB and are'provided with nuts 38 adapted to-be tightened against the plates for securing same mproper position on the wall. w I V i In use, my trip mechanism is secured to the side wall 2 of-the conveyorand is ad justed in proper position thereto through the slot 6 formed in the'plate. Presser bar 34 is then adjusted properly so that the plate 35 .will efi'ectively'compress successive book sections as they pass thereunder.

Frequently, these book sections are inflated or bulky-and then must be compressed before they are allowed to pass under the screw 12 provided trip plate 11. However, due to the edges of these book sections becoming curled as shown in Fig. 3,.the same will engage the trip plate 11 to cause the same to pivot on the pin 10..

Then this movement takes place, the adjusting screw 12 will move towards the lower. extremity of bar 17 to cause the same to become displaced from support on the lug 8. As this occurs, the lever 14, which is of weighted construction, will. swing downwardly causing the outwardly curved freeend of finger 1810 engage the yoke portion of bar 19. p v

A slight engagement will cause this joint to break, allowing plunger 23 todrop and in-turn separating the contact blocks 28 from the contact 32. This instantly breaks the circuit, causing the endless conveyor to stop, and allow the proper remedy for correcting the defective situation. The rib 3 serves to aline the arm and link sect-ion while my mechanism is in set posit-ion.

Proper adjustmentof adjusting screw 24 and jamb nut 25 may be made, for effecting the proper tension of the leaf springs 27 with respect to the contact blocks.

Having thus described my invention, what I claim as new is Y 1. In a trip mechanism for breaking an electrical circuit to the motive means actuating an endless conveyor,-a trip arm adapted to be actuated by the passage of an object on the conveyor, the weighted bar associated with the plate and adapted to be released by the movement of the trip arm, a linked bar normally having its sections alined, said linked bar adapted to be displaced from alinement by the movement of the weighted bar.

2. In a trip mechanism for breaking an electrical circuit comprising a plate, a trip arm, an abutment onthe-platefor engaging the end of the-trip arm, a linked bar having the sections thereof normally inalinement, said linked sections adapted to be, displaced by the movement of thetrip arm,--an abutting rib on theplat-e for maintaining the linked bar section normally in alinement when the mechanism is in set position, a platform mounted at the top of the plate, a switch means arranged thereof and in operative connection with the linked bar.

3. In a trip mechanism for breaking an electrical circuit comprising a late, a trip arm, an abutment on the plate or engaging the end of the trip arm, a-linked bar having the sections thereof normally in alinement, said linked sections adapted to be displaced bythe movement of the trip arm,an abut-' ting rib on the plate for maintaining the linked bar section normally in alinement when the mechanism is in set position, a platform mounted at the. top of the plate, a switch means arranged thereon and in opera t-ive connection with the linked bar, said switch means comprising afixed contact block, a plunger adapted to be moved by said linked bar, and ad usting screw threaded into one end of said plunger, a movable contact block carried by said screw and adapted to be adjusted in respect to the fixed contact, and resilient means interposed between the movable contact block and the fixed contact block.

4. In a trip mechanism for breaking an electrical circuit comprising a plate, a trip arm, an abutment on the plate for engaging the movement of the trip arm, a linked bar having the sections thereof normally in alinement, said linked sect-ions adapted to be displaced by the movement of the trip arm, an abutting rib on the plate for maintaining the linked bar section normally in alinement when the mechanism is in set position, a platform mounted at the top of the plate, a housing arranged upon said platform, a fixed contact block carried on the inner side of the top of the housing, a plunger connected at one end and with the linked bar, an adjust-ing screw threaded in the opposite end of the plunger, the movable contact carried by the adjusting screw, and resilient means interposed between the movable contact and the fixed contact.

5. In a trip mechanism for breaking an electrical circuit comprising a plate, a trip arm, an abutment on the plate for engaging the movement of the trip arm, a linked bar having the sections thereof normally in alinement with said link sections adapted to be displaced by the movement of the trip arm, an abutting rib on the plate for maintaining the linked bar section normally in alinement when the mechanism is in set position, a platform mounted on the top of the plate, a pair of fixed contact blocks supported over the platform, a plunger operative through said platform, a leaf spring supported on said plunger, and a pair of movable contact blocks secured at opposite ends of the spring, and in direct underlying position with respect to the fixed contact block.

In testimony whereof I aflix my signature.

RAY BONEBRAKE.