US1569909A - Feeding mechanism for book-sewing machines - Google Patents

Description

u. BISCHOF FEEDING MECHANISM FOR BOOK SEWING IACHQINBQ' Jan.

5 Shee ts-Sheet 1 Filed Dec. 13, 1920 Jan. 19,1926.

' u BISCHOF FEEDING MECHANISM FOR BOOK SEWING MACHrNES Filed Dec. 13, 1920 5 Sheets-Sheet 2 v, Z22/v ewl- ULB L6 @12 1.

' Jan. 19,1926. 1,569,909

. I U. BISCHOF I FEEDING MECHANISM FOR BOO K SEWING MACHINES Filed D90 13, 1920 5 Sheets-Sheet 5 26 lave-m1 ZLB $50M Jan. 19 1926,

1,569,909 U. BISCHOF v FEEDING MECHANISM FOR BOOK SEWING MACHINES Filed Dad. 13, 1920 5 Sheets-$heet 4 i 9 as 57 52 1 fizz'enm Patented Jan. 19, 1926.

UNITED STATES PATENT OFFICE.

"ULRICH BISCHOF, OF HORGEN, SWITZERLAND, A SSIGNOR TO GEBR. STAUBLI, OF I'IORGEN, SWITZERLAND.

FEEDING MECHANISM FOR BOOK-SEWING MACHINES.

Application filed December 13, 1920.

To all whom it may concern:

Be it known that I, ULRICH BISGHOF, a citizen'of Switzerland, residing at Horgen, in the county of Zurich and State of Switzerland, have invented certain new and useful Improvements in Feeding Mechanism for Book-Sewing Machines, of which the following is a specification.

In book fastening machines, as is well known, the previously folded sheets are fastened together by means of thread, and piled successively side by side on the book table of the machine to a pile, the said pile being then fed forwards through a distance equal to the thickness of a sheet each time a fresh sheet is added by the table saddle to the said table. In this feeding movement the pile of sheets slides along the book table. It has now been found that owing to the friction of the sheets on the table, the lower portion of the pile sometimes moves through a smaller distance than does its upper portion, and consequently the several sheets in the pile gradually assume an inclined position. The operator has therefore to straighten the pile from time to time, for which purpose the machine has to be stopped in order to avoid the risk of accidents. It will be readily understoodthat this considerably diminishes the output of the machine.

The improved apparatus forming the subject matter of this invention obviates the above mentioned drawbacks.

The improved apparatus comprises drivers which alternately make progressive movements in the direction of the feed, and then make movements oppositely thereto, but come into contact with the fastened sheets only during their movement in the former direction. This expedient causes the sheets to move forwards uniformly along the book table.

The accompanying drawings illustrate a constructional example of the new apparatus in its application to a thread-fastening machine so far as is required for the under standing of the invention.

In these drawings:

Fig. l is a side elevation.

Fig. 2 is a rear elevation.

Fig. 3 is a section on the line A-B of Fig. 2, drawn to a larger scale.

ing the latter.

Serial No. 430,359.

details on a larger different positions.

On a pin 2 mounted in the frame 1 there is located a driving pulley 3 to which is positively connected a toothed wheel 4. This wheelmeshes with a toothed wheel 5 whose shaft 7 is mounted in one end of a lever 6, and also carries a disc 8 formed with a rib, which rib, by depressing the treadle 9 arranged on the lever 6, can he brought into engagement with a second grooved disc 10 for the purpose of rotat- The shaft 11 carrying the grooved disc 10 is mounted in the frame 1,

and carries a cam 12 on which the anti-fricmounted by means of the shaft 15 in an eye of the frame 1. On the shaft 16 which only is lifted and lowered by the cam 12 and the roller 13 but not turned on its own axis and which is carried by the arm 14:, there is fixed a second arm 17 whose end is connected by a link 18 to the end of an arm 19. This latter is fixed in its turn to a shaft 21 that is mounted in the book table 20 hereinafter referred to. y

A spring 39 fixed at one end to the machine frame and at its other end to the arm 17, has a tendency to force the arm 17 downwards, and thus press the roller 13 against the cam 12. The shaft 21 carries by means of arms 22 a rod 23 with links 2 1, each of has laterally projecting tappets 28, 29, having in cross section the shape of a triangle with a rounded corner. Each driver bar carries a sliding pin and 31 respectively situated in the path of the adjacent tappet 28 and 29 respectively. The illustrated shape of the latter has the result that when the drivers are moved for instance in the direction of the arrow shown in Fig. 8, that is to say, from the rear towards the front, the sliding pins 30, 31 slide at first along the tappets 28, 29 in the upward direction, and then drop down, and thus cause the corresponding driver bars 25 to rise up over the table surface, and then fall down again. On the return stroke of the. driver bars the sliding pins come under the tappets and thus cause the driver bars to move down below the table plate. In order to effect this, slots 39* are provided in the table plate and the driver bars rest upon flat springs 39' (Fig. 9) fixed to the underside of the table plate.

The book table 20 rests on a screw spindle guided in the frame, and carries a screw nut having the shape of a chain wheel 3st. The spindle is connected by a chain 65 to a chain wheel 36 which together with the hand wheel 37, is located loose on the bolt 38 fixed in the frame. By suitably rotating the hand wheel, the book table can be adjusted in the vertical. direction. The table saddle 40 that serves to receive the folded sheet is fixed on a shaft 4-]. mounted in the machine frame. The support for the fastened sheets constitutes an angle-shaped member 43 which is jointed by means of a link 42 to a slide block 4-3 that is in its turn guided in the book table 20.

The needle aparatus is located above the table saddle. This apparatus consists of a guide bearing -14 fixed to the machine frame, and the bars 46 that are guided therein and carry the needles A lever 41S mounted on a shaft l? in the machine frame, and having a forked end, engages a block l9 pivoted to the needle bar 46. The shaft 47 receives from time to time by known means not forming part of this invention an oscillatory motion, whereby there is imparted to the needle bar an upand down-motion by means of which the needles are caused to pierce the sheet laid on the table saddle.

For the purpose of stopping the machine by hand, the hereinafter described disengaging apparatus is provided.

On the aforesaid shatt 15 there is pivotally mounted an arm 50 with shaft 51 on which are fixed a hand wheel 70 and a small grooved wheel 52, the ribs of which engage in the large grooved wheel 10. It should be taken into consideration that the arm Ll carrying the anti-friction roller 13 and the axle 16 is movable on the pivot 15 independently of the arm 50 carrying the shalt 51 with the hand wheel 70 and the grooved wheel 52, so that the roller 13 may be lifted and lowered by the cam 12 while the grooved wheel 52 freely rests on the disc 10 as shown in Figs. 13 and 1-l-v Tl 3 arm 5-0 carries by means of an extension, the lower end oil? a hand lever .52 A coiled spring :33 (Fig. 3) which bears at one end against the extension of the arm 50, and with its other end against a set collar 52" mounted on the hand lever 52', is designed for the purpose of allowing the hand lever :32 to be rotated only with diiliculty in the arm 50.

The a'ioitsaid treadle lever 9 is engaged by a rod 55, (see Figs. 11 to l-l) the upper end of which is pulled by a spring :76 attached to the arm 5!). against the can; 57 located on the hand lever .32. A slot provided in the rod 55, serves to receive a bolt 56' situated on the arm 50. hen the hand lever in Fig. l. pressed to the right, the cam 57 presses the rod likewise to the right, with the result that its slot comes over the pin 4'30. The bottom of the slot (Figs. 1, ll and is slightly inclined in the downward direction in order that when the slot slides over the bolt 56, the rod :35 will be slightly raised, and the small grooved wheel 8 carried by the arm 6 will be moved out of engagement with the large grooved wheel 10, so that the latter and the rain 12 driven by it will come to a standstill. The operalor' is thus enabled by turning the hand lever 52 or pulling the rod 68 to stop the machine instantly. The hand wheel 70 and (he grooved wheel as connected positively to it, are designed (altethe machine has been stopped in the manner above described) to enable the operator by turning the hand wheel T0, to start the machine slowly by hand, as is desirable for instance for remedying breakdowns or for removing the fastened sheets :from the machine. The slot as it slides over the bolt 56 presses down the arm 50 and therewith the grooved wheel 52, so that it is iorcilily messed in the groove of the wheel 10. In this position of the parts 52, 55 and ii? (see Fig. ll) it is absolutely impossible to press down the treadie l) and to start the machine by the grooved wheel 8. This may only be elliected when the hand lever F2 has been locked forwardly and the :am 57 removed from the rod 54") (see Figs. 1 and 13).

In Fig. 13, the wheel 8 engages the wheel 10 and the machine is normally driven. This condition is obtained by moving the lever 52 by hand from the position shown in Fig. ll into the position shown in Fig. 13. The cam 57 fixed to the lever .32 is also moved in the same direction, so that the spring pulls the rod having the slot 58 in the position shown in Fig. 1.7%. In this position the slot 58 of the rod 55 is disengaged from the bolt 50'. The treadle 9 is therefore free to beopi-n'atcd for driving the machine by the motor. In this position the wheel rigidly connected to the hand lll l wheel 70 rests only by its own weight onthe wheel 10 and is turned thereby continu ously. 1

If however it is desired to drive the machine by hand and the hand wheel 70, for a short period, the lever 52 has to be moved into the position shown by Fig. ll. When doing this,the cam 57 moves the rod to the right- (Fig. 1.4) and the slot 58 comes into engagement with the bolt 56. Due to the cooperation of the slot 58 and the bolt 56, the rod 55 is thereby slightly lifted, so that the wheel. 8 diseng' es from the wheel 10. If pressure is then applied to the treadle 9 by the foot, the wheel is pr; d upon the wheel 10, which when turned by hand drives the machine.

The cam 12 rotating with the wheel 10 produces by its action upon the anti-friction roller 13 (see Figs. 13 and 14. a rocking movement of the arm 14 around its pivot 15 whereby the arm 17 is also lifted and lowered thus producing; by the rod 18 and the arm 19 a rocking movement of the shaft 21. This rocking motion bymeans of the arm 22, the rod 23 and the links 2%, causes the driver bars 25 to move to-andfro. As already stated, the driver bars move out of the machine table only in the forward stroke, and then exert a pushing; action against the basal surface of the pile situated on the book table, so that the said pile is caused to. move to the rear by force at top and bottom'along the book table by the action of the blow exerted by the table saddle.

In order to cause the machine to be an tomatically disconnected when the pile has increased to the full length of the book table, the following described arrangement is employed. I

The slide block 43 is provided with a pin 59 which, in the rear-most position of the slide block, strikes the inc ined surface of a pawl 60, which latter is pivoted to a lever 61. that is loose 011 the shaft 21. The lever 61 is connected at its lower end by means of a spring 63 to a bolt 6? situated on the stationary book table 20. The pawl in its position shown in Fig. 1, lies against a pin 6% of the stationary book table, and is mounted loose on pin of the lever 61. The latter also carries a stop 62 for the nose 6? of the lever 66 mounted on the pin 65. The upper end of this lever 66 is connected by a rod 68 to the lever 52. Vi heinin the case of the book table being full, the pin 59 brings the pawl (3 out of engagement with the pin 641-, the lever 61 is caused by the tension spring 63 to rock to the right, whilst the lever 66 pivoted to the lever 61, rocks to the left, with the result that the rod 68 causes the hand lever 5:2 to rock to the right, and stop the machine in the manner above described.

;rooved wheel 52 carried by the arm Further in connection with theoperation of the machineit is to be noted that the cam l2 when rotating lifts and lowers the antifriction roller 18 drawn to the cam 12 by the spring 39 attached to the arm 17. This movement causes a rocking" movement of the arm 13% as already described and also of the arm 1%) and the shaft 2i. The 5i) and resting on the grooved wheel ll) is turied by the same, the shaft 51 and the hand wheel 70 being also idly turned. The lat ter together with the wheel 52 has only the purpose to enable the operator when the machine has been stopped to start the machine slowly by driving the wheel 10 when it is desirable.

What I claim is 1. In a book sewing machine, the combi' nation of a book table for receiving" a pile of fastened sheets in the upright position with an abutment mounted on the table for supporting; only the upper part of the pile of fastened sheets, drivers for straightening only the lower part of the sheets, means for imparting to and fro motion to the drivers, and means for pressing said drivers against the lower edges of the sheets of the pile during their movement towards the abutment, and keeping them out of action upon the sheets in their movement in the opposite direction.

2. In a book sewing machine the combination of a book table for receiving a pile of fastened sheets in upright position with an abutment mounted on the table forsupporting only the upper part of the pile of fastened sheets, the vertical distance be tween the surface of the table and the abut mentbeing adjustable.

3. In a book sewing machine the combination of a book table stationary in the horizontal direction for receiving a pile of fastened sheets in the upright position, with an abutment, a slide block guided in the book table, a link jointed at one end on the abutment and at the other on said slide block and permitting" adjustment of the vertical distance between the surface of the table and the abutment.

i. In a book sewing machine the combination of a book table for receiving a pile of fastened sheets in the upright position, with a rocking shaft mounted in the book table, arms located on the rocking shaft, a bar supported by these arms, drivers for straightening the lower part of the pile of fastened sheets, a series of links, each of which being connected with one end on one of said arms and with the other on the end of a driver for imparting to and fro motion to the drivers.

5. In a book sewing; machine the combination of a book table for receiving a pile of fastened sheets in the upright position,

one direction, the pins will slide over the w tuppets and press the drivers against the pile, and when the drivers are moved in the other direction, said pins will pass undernenth the tuppets and keep the drivers out of action upon the said sheets.

In testimony whereot I have utiixed my signature.

ULRICH l3

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