US1691641A - Pressing-machine mechanism - Google Patents

Description

- Nov. 13, 1928.

, 1,691,641 A. B. cLlssoN PRESSING MACHINE MECHANISM Filed June 12. 1924 2 Sheets-Sheet 1 A TTORNEYj,

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Nov. 13, 1928.

A. B. CLISSON PRESSING MACHINE MECHANISM Filed June 12. 1924 2 s t -s t 2 INVENTOR.

- Y /5 ATTORNEYS.

Patented Nov. 13, 1928.

UNITED STATES- PATENT OFFICE.

ALBERT 1B. CLISSON, OF SYRACUSE, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE PROSPERITY COMPANY, INC., OF SYRACUSE, NEW YORK, A. CORPORATION OF NEW YORK.

PRESSING-MAGHINE MECHANISM.

Application filed June 12,

This invention relates to pressing machines, such as garment and laundry pressing machines, and has for its object a particularly simple and efficient mechanism for actuating the movable press head, by which the power can be effectively applied to the press head only when the press head is moved by the operator a predetermined distance toward closed position and preferably when the press head is so close to the buck that it is impossible for the operatior to have his hands between the pressing elements, and by which at all other times except when the press head is in nearly closed position or what is termed a safety-first position, the power if applied will idle the motion transmitting mechanism and will be ineffective on the movable pressing element or head. 7

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and described.

In describing this invention reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure .1 is a side elevation of a pressing machine embodying my invention, the press head being shown as in closed position.

Figure 2 is an enlarged fragmentary elevation showing the position of the parts when the press head is open, the position of the links and parts operated thereby when in nearly closed position being indicated in dotted lines.

Figure 3 is a sectional view on line 3-3, Fig. 2.

This pressing machine comprises, generally, cooperating pressing elements as a lower buck 1, and a press head 2, movable toward and from the buck 1, a power member, and actuating mechanism for applying power to the press head after it has been moved preliminarily to what, for convenience, is called a safety first position. The press head is movable preliminarily to a closed position or a nearly closed position, that is a safety first position independently of the power mem- The actuating mechanism comprises toggle members one of which is pivotally connected to the movable head and the other to the frame, these toggle members being normally in folded position and movable to-- ward straightened position by the preliminary movement of the press head 2, inde- 1924. Serial No. 719,693.

pendently of the power member. Such mechanism further includes connections between the power memberv and the toggle for power member to the toggle) by the straightening movement of the toggle, effected by theclosing of the head 2 by the operator independently of the power mechanism.

The buck 1 ishere shown as supported upon a bracket 3, which in turn is mounted on a table 4 forming part of the main frame, the table being supported on suitable legs or pedestals 5, 6. The press head 2 is carried by a lever or yoke 7 pivoted between its ends .at 8, to a standard 9 forming an upper extension of the rear leg 6 of the frame.

10 is the counterbalancing weight mounted on the rear arm of the yoke 7 and tending to counterbalance the head 2; and 11 is the spring connected to the rear end ofthe arm 7, tending to open the press, that is, to actuate the lever 7 to move the head upwardly.

12 is the power member it being here shown as a lever pivoted between its end on a horizontal pivot 13, to the frame near the base thereof, this lever extending forwardly and rearwardly.

14 and 15 are toggle members pivoted together at 16, and pivoted respectively at 17 to the rear arm of the yoke -7 and to the frame, thelever 15 being preferably pivoted to the frame by the pivot 13 that connects the power lever 12 to the frame. The member 15 is double as shown in Fig. 3, and includes links arranged on opposite sides of the member 14 and the lever 12. i

The toggle members, when the head is open, are in the position shown in full lines in Fi 2, and are movable toward straightened posi- .tion, but not entirely into straightened osibuck. The yoke 7 is provided with a suitable handle 18 for so moving the head to safetyfirst position.

The connections between the power member or lever 12 and the toggle are arranged to idle or work ineffectively when the press head is open or at any time before the head 2 is arought down to safety-first position and to effectively transmit motion only after the head 2 has been brought down to safety-first position. These connections comprise links me pivotally connected to the tpggle, and the other to the rear arm of the power lever, and

\ pivotally connected together by a lost motion connection, a stop for limiting the relative pivotal movement of the link connected to the toggle in the direction of the closing movement of the toggle, and a stop for limiting the relative pivotal movement of such links about their pin and slot connection, when the press head 2'has been brought to a safety-first position, the links at this point being usually in mem . a straight line as shown in Fig. 1, and in dotted lines, Fig. 2.

19 and 20 designate the links respectively,

the link 19 being pivoted to the toggle and preferably mounted on the toggle joint or pivot 16 and forming a downward extension of the toggle member 14, the link 19 having a pivotal movement relatively to the togglemember 14, and the to gle member having a sto 21, on its front side. Thus the toggle Ber 14 and the link 19 are connected together by a stop joint. The link 14 is also provided with a stop 22 for limiting the relative pivotal movement of the link 19 in the direction of the straightening movement of the tog le, and a spring 23 is interposed between t e links 14 and 19, or arranged in any other manner to tend to thrust the link 19 toward the stop 21, and resist pivotal movement if the link 19 in a rearward direction.

The link 20 is pivoted at 24 to the rear arm of the power lever 12 and normally extends horizontally rearwardly therefrom, and is pivotall connected to the lower end of the link 19 y a pin and slot connection, the link 19 being formed with a pin 25 working in a lengthwise slot 26 in the link' 20. The link 20 is also formed double as shown in Fig. 3, and extends on opposite sides of the link 19, and the opposite sides of the link 20 are connected by a part 27 on the rear or lower side thereof which part acts as a stop to limit the relative pivotal movement of the links 19 and 20 when they have been brought to strai htened position as indicated in Fig. 1, and 1n dotted lines Fig. 2. The link 20 is shorter, than the toggle member 15, and hence the links 19 and 20 come into straight position before the toggle members 14 and 15 are in straightened osition. Owingtothisarrangement, when t e press head has been brought down to a safety first position, the links 19 and 20 are brought into efi'ective or operative position and then when power is applied to depress the lever 12, the motion is transmitted through the straightened links 19 and 20, and then by the final straightening movement of the toggle members 14 and 15, to the head 2. During such final straightening of the toggle members 14 and 15, pressure of the power lever is transferred to the head 2.

In the event the power lever 12 is depressed when the head 2 is open, obviously the link 20 will merely idle owing to the pin and slot connection 25, 26. If the power is turned on at an intermediate point when the press head is between wide open and safety first position this lever 20 will merely idle. If the power is applied to depress the lever 12 when the head is nearly to safety-first position and the links 19, 20 nearly tostraight- .cn'ed position any tendency of the link 20 to thrust endwise on the link 19, and hence close the press will cause the link 19 to move rearwardly on its pivot against the spring 23, and

unless the operator has his hand on the handle 8 such movement will cause the head to open up easily.

The arrangement of the stops 21, 27, is

such that they come into action approximately when the pin 25 reaches the lower end of the slot 26, and until these parts come into this relation the links 19 and 20 are merely idle if the lever 12 is depressed. This idling is effected or permitted when the press head 2 is nearly but-not quite in the safetyfirst position by the rearward pivotal action by the link 19- against the spring 23'. i

The links 14 and 15 are provided with suitable buifers 28, 29, arranged to engage each ,other when the press head is open and, the parts are in the position shown in Fig. 2.

The lever 12 is depressed by power here shown 'as a shaft 30 having an eccentric 31 thereon coacting -with a face 32 on the lever 12, the shaft being actuated by an electric motor 33 connected to the shaft 30 .through suitable gearing and a clutch located in the casing 34. p e

The construction of the gearing and the clutch forms no part of this invention but forms the subject matter of my pending application Sr. N 0. 695,247, filed February 26, 1924, and is shown in my Patent No. 1,599,115,

issued September 7 1926. It is sufiicientto bear in mind that the clutch is a periodic or a half revolution clutch, which is thrown in by hand and out automatically as each half revolution is completed. Throwing of the clutch in causes the shaft 30 to make a half revolution and applies power at which time the power lever 12 and parts actuated thereby enter the position shown in Fig. 1. They will remain in this position as long as desired, whereupon the operator again throws the clutch in and the shaft 30 makes another half revolution moving the eccentric 31 into the diametrically opposite position from that hown in Fig. 1, so that, the counterweight 10 .nd spring 11 open the press. A suitable spring 35 causes the lever 12 to follow the cam although this spring is unnecessary.

Owing to this mechanism, the dead center or neutral points are eliminated that is, points Ll which the toggle and link might be in such position as to stall the'machine by not moving in either direction or momentarily stall the machine and then suddenly close the machine or suddenly open it with violent shocks. Such stalling causes burning out of fuses and of the motor, and breaking of parts of the machine and is liable to cause the machine to injure the operator. Also this mechanism entirely dispenses with supplemental controls nanual or automatic. trol lever, to wit: that by which the clutch is thrown in. Although the operator can apply the power orthrow in the clutch at any time, the power is ineffective on the press head unless it has been first brought com pletely down to a safety-first position.

The throwing on of the power at any time may upset the sequence of'the machine, but to restore the sequence it is merely necessary to throw in the clutch for an additional idling operation.

-What I claim is:. 1

1. A pressing machine comprising a frame, co-operating pressing elements carried by the frame, and one movable toward and from the other, actuating mechanism for the movable element comprising a power member and motion transmitting connections between said member and the movable element including parts normally out of effective posi tion and arranged to be carried to effective position to apply pressure to the movable element when said element is moved independently of the power member to closed position, said connections comprising a toggle including members, one connected to the movable element and the,other to the frame, links pivoted respectively to the power member and to the toggle and connected together by a pivotal lost motion connection, and a stop for limiting the pivotal movement of the link pivoted to the toggle.

2. A pressing machine, comprising a frame, co-operating pressing elements carried by the frame, and one movable toward and from the other, actuating mechanism for the movable element comprising a power member, and motion transmitting connections, arranged to be carried to effective position to apply pressure to the movable element, when said element is moved independently of the power member to closed position, said connections comprising a toggle including members, one connected to the movable element, and the other to the frame, links pivoted to the power member and to the toggle respectively, and connected together by a pivotal There is but one coninto effective position to apply pressure to the movable element, when said element is moved'-"i'ndependently of the power member to closed position, said connections comprising a toggle including members connected respectively with the movable element and to the frame, links pivoted respectively to the joint of the toggle, and to the power member, and pivoted together by a lost motion connecs tion, a stop for limiting the pivotal movement of the link pivoted to the toggle about the joint of the toggle, and a spring tending to move said link on its pivot toward the stop.

4. A pressing machine, comprising a frame, co-operating pressing elements carried by the frame, and one movable toward and from the other, actuating mechanism-for the movable element comprising a power member, and motion transmitting connections comprising a toggle including members connected respectively with the movable element and to the frame, links pivoted respectively to the joint of the toggle and to the power member, and pivoted to other by a lost motion connection, a stop for imiting the pivotal movement of the link pivoted to the toggle about the joint of the toggle, a spring tending to move said link on its pivot toward the stop, the links having means for limiting the pivotal movement thereof about their lost motionconnection when said links are in'approximately a straight line.

5. I A pressing machine comprising a frame,

cooperating pressing elements carried by the I frame, one movable toward and from the other, and actuating mechanism for the movable element comprising a power lever pivoted to the frame between its ends, and motion transmitting connections comprising a toggle including members pivotally connected respectively to the movable element and to the frame, a link pivoted on the joint of the toggle, and a link pivoted to one arm of the power lever and connected to the former link by a lost motion pivotal connection, and a shoulder on the link pivotally connected to the power lever to limit the pivotal movement of such link in the direction of the closing movement of the toggle.

6. A pressing machine, comprising a frame,

cooperating pressing elements earned by the frame, one movable toward and from the other, and actuating mechanism for the movable element comprising a power lever pivoted to the frame between its ends, and motion transmitting connections comprising a toggle including members pivotally connected respectively to the movable element and to the frame, a link-pivoted on the joint of the toggle, and a link pivoted to one arm of the power lever and connected to the former link by a lost motion pivotal connection, a Spring interposed between the toggle member connected to the movable element and the first link, and arranged to resist pivotal movement of such link in the direction of the opening movement of the toggle.

7. Apressing machine, comprising a frame, cooperating pressing elemen'tscarried by the frame, one movable toward and from the other, and actuating mechanism comprising a power lever pivoted between its ends to the frame, a toggle comprising a member pivotally connected to the movable element and to the frame respectively, a link pivoted on the joint of the toggle and movable on its pivot relatively to the toggle members, and forming an extension of the toggle member connected to the movable element, stops for limiting the pivotal movement of such link in opposite directions, a spring tending to move the link on its pivot in the direction of the closing movement of the toggle, a link pivoted to. one arm of the power lever, and pivoted to the first link below the joint of the toggle by a lost motion connection, and a stop for limiting the pivotal movement of the links when the links are in approximately a straight line. 3 I

8. Apressing machine, com risin a frame, cooperating pressing elements carried by the frame, one movable toward i and from the other, and actuating mechanism comprising a power lever pivoted between its ends to the frame, a toggle comprisinga member pivotally connected to the movable element and to the framerespectively, a link pivoted on the joint of the toggle and movable on its pivot relatively to the toggle members, and forming an extension of the toggle member connected to the movable element, stops for limiting the pivotal movement of such link in opposite directions, a spring tending to move the link on its pivot in the direction of the closing movement of the toggle, a link pivoted to one arm of the power lever, and pivoted to the first link below the joint of the toggle by a lost motion connection, and a stop for limiting the pivotal movement of the links when the links are in approximately a straight line, the link pivoted to the power lever being shorter than the toggle member pivoted to the frame, whereby said links reach a straight line before the toggle link approaches a straight line.

9. A pressing machine,comprisin a frame, cooperating pressing elements carried by the frame, one being movable toward and from the other, a lever pivoted between its ends to the frame and carrying the press head on the front arm thereof, a power lever pivoted to the frame near the base thereof, upright toggle members pivoted respectively to the reararm of the first mentioned lever and to the frame near the base thereof, a link pivoted on the joint of the toggle, stops arranged on the toggle member pivoted to the first mentioned lever on the front and rear sides of such joint, a spring tending to move the link toward one stop, a second link pivoted to the rear arm of the power lever and pivoted to the former link by a pin and slot connection, said link being shorter than the toggle member pivoted to the frame, and said link being provided with a stop arranged to limit the pivotalmovement thereof, when said links are approximately in a straight line.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and in the State of New York, this 20th day of May, 1924.

ALBERT B. CLIS SON.

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