US1378742A

US1378742A - Press throw-out

Info

Publication number: US1378742A
Application number: US332221A
Authority: US
Inventors: Walkup Samuel Thomas
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-10-21
Filing date: 1919-10-21
Publication date: 1921-05-17
Anticipated expiration: 1938-05-17

Description

s. T. WALKUP. PRESS THROW-OUT.

APPLICATION FILED OCT- 2!, 1919.

Patented May 17,1921.

3 SHEETS-SHEET I.

S. T. WALKUP. PRESS THROW-OUf.

APPLICATION FILED OCT. 21. 1919.

-SHEET 3.

May HEETS Patented (UNITED, STATES PATENT OFFICE- SAMUEL THOMAS WALKUJB, or NEW YORK, NLY.

rnnss THRO -our.

To all whom it may concern:

invented a certain new and useful Press Throw-Out, of whichthe following is. specification.

This invention relates to a throw-out mechanism for presses being intended "more particularly for application to a press for artificial flowers 'disclosed'in a previous apglication filed by me on May 20th, 1919, erial No. 298,491.- V

The present invention has foranobject to provide a simple and inexpensiveattachment which will automatically remove the pressed flower or otherarticle from the'die.

For further comprehension of the invention, and of the objects "and advantages thereof, reference willbe had to the following description and. accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Figure 1 of the drawings is aside elevation of a press having the invention applied thereto.

Fig. 2 is a fragmentary front: view on a larger scale showing the attachment and a small portion of the press structure.

Fig. 3 is a detail transverse section, showing particularly the gripping jaws, this view being taken on the line 33.of Fig. 4.

Fig. 4 is a horizontal section on the line 4-4 of Fig. 2. V

Fig. 5 is a detail section on the line 5--5 of Fig. 4 on a larger scale.

Fig. 6 is a fragmentary sectional elevation showing the pawl carried by the presser head to operate the throw-out.

The press to which my invention is here shown applied, which press is disclosed in detail in the application above referred to, comprises a table 1 having a standard 2 thereon in which is slidably mounted a block 3 carrying a punch head, or presser head 4. The block 3 is engaged by one end 5 of a bell crank lever 6 fulcrumed as at 7 to the standard 2 and having a long depending arm operable by suitable means the precise nature of which has no relation to the present invention, this lever serving to operate the presser head.

Mounted on the table 1 is a guidebed 8 on which is slidably mounted a die carriage 9 PatentedMay 17, 1921.

Application filedflctober 21, 1919. Serial- No. 832,221.

having fixed thereon a die 10. This carriage is reciprocated horizontally in conjunction with the vertical reciprocation of the presser head, by means of a pair of levers 11 ful crumed to brackets 12 depending from the table 1. Theupper endsof'these levers are connected to sleeves 13 slidable on rods 14 connected to the die Carriage 9, the sleeves being disposed between compression springs 15 on the rods. The levers are each'longitudinally slotted as at 16 and a transverse pin 17' carriedon the main lever 6 bears at its ends in these slots.

Myimproved attachment comprises a. pair of

jaws

20 and 21 having their .jawface's, indicated at 22, extending in :a general vertical direction in the median line of the press. The jaw 21 is hinged upon the jaw 20 as at 23 and is normally. held closed by the tension springs 24'which are connected at opposite ends to'ithe respective jaws. The jaw 20 is formed with an integral tail 25 by which it is secured on a rod 26 journaled in a bracket 27 fixed to the die carriage 9. A coiled spring 28, which surrounds the rod 26 and bears at one end on the face of the die carriage and has its opposite end hooked over-the aw tail 25, serves to normally retain the jaws .in the position shown in full lines in Figs. 2,-and 3, and to return the jaws to this position a'fter operationby the throwout means. In this position the jaw 20 rests on acushion 20 upon the die carriage 9. The jaw 21 is provided with a tail 29 in which is fixed a rod 30 adapted to bear against a post 31 projecting upwardly from the table 1 to openthe jaws and release the flower when the jaws are swung by the throw-out means to the position shown in dotted lines in Fig. 2.

The throw-out means comprises an arm 35 fixed to the projecting end of rod 26 and having mounted thereon a roller 36 adapted to be engaged by a cam face 37 on one arm of a bell crank lever 38, fulcrumed on a pin 39 journaled in a secondbracket 40 on the die carriage 9. The opposite arm 38 of this lever has fixed thereon a pin 41 which is adapted to be engaged by a pawl 42 pivoted between the forked lower ends of an angular arm 43 fixed to the block 3. The pin 41 is so disposed with reference to the pawl 42 as to project at its end across the path of travel of the pawl which normally projects outwardly from the arm 43, being maintained in this position by a spring 44, the pawl being mounted so as to swing upwardly against the action of spring 44 but being preventedfrom swinging down below the horizontal position by means of a plate fixed to the said forked lever'ends' of arm 43.

The operation is as follows: Levers 6 being reciprocated, the die carriage 9 1s likewise reciprocated through levers 11 and rods 14. When the die carriage is in its outermost position the flower to be pressed is inserted in the die and the stem thereof is simultaneously placed between the

jaws

20 and 21 which may be opened slightly by pressing down with the hand on rod 30. In *ig. 4 of the drawing the flower is indicated at in position in the die and the stem 51 thereof is shown extending between the jaws. When the die moves inwardly it stops under the presser head 4 which keeps on descending. In this position the end of pin 41 is in the path of travel of pawl 42 which swings backward to passthe pin and then returns to normal position.

As the presser head ascends the pawl engages the pin, the parts being so arranged that the presser head will have lifted clear of the die before this happens. As the pawl strikes the pin it swings the arm 38 of the bell crank lever downward with a rapid snapping motion and the cam 37 thereon rides on roller 36 and swings arm 35, and with it the jaws. When the lever 38 swings downward the pin 41 is moved laterally to clear the pawl, the face of which is preferably beveled as at 42 The momentum imparted to the jaws causes them to swing over to the position shown in dotted lines in Fig. 2, and, as the rod 30 strikes the post 31, the jaws are opened and the stem, or other article, thrown out. The springs 24, it will be noted, serve the double purpose of closing the jaws again and of cushioning the impact as the latter are brought to a stop by post 31. As will be understood the lost motion between the levers 11 and rods 14 which is provided by thesprings 15,, causes the die carriage 9 to remain at rest until the presser head has cleared the die in its upward movement. The jaws are returned automatically to their starting position by' the coiled spring 28 while the cam lever 38 is prevented from being thrown an undesirable distance Fupward as-the-roller 36 rengages therewith,

by the pin 41 bearing on the top of the block 40 to which the cam lever is fulcrumed.

Claim:

In a press, a die, a reciprocatory carriage on which said die is mounted, a presser head, a jaw member pivoted on said die carriage, a second jaw member pivoted on the first jaw member, resilient means holding said jaw members closed, a cam-faced lever adapted to cause said jaw members to swing on the pivot ofthe first jaw member, a pawl carried with the presser head and adapted to engage and operate said lever when the presser head is ascending, and