US1702344A - Geoege g - Google Patents

Description

Fe b. 19, 1929.

1,702,344 G. G. GRIEST PRESS Filed April 5, 1926 2 Sheets-Sheet 1 INVENTOR $0 0 By W A TTORNEY.

Patented Feb. I9, 1929.

UNITED STATES GEORGE G. GRIEST, 01:" CINCINNATI, OHIO. I

PRESS.

Application filed April 3, 1926. Serial No. 99,591.

My invention relates to the general class of presses and particularly to the-type of press which is utilized for pressing garments and other fabrics. It is the object of my in 5 vention to incorporate in a press, a source of power to provide a power, pressing stroke which will eliminate much of the fatigue which an operator experiences in operating a manual or foot power press. It is specifilo cally my object to provide such a source of power preferably in an electric motor of a type generally known as a torque'motor.

A further specific object is an electric control system for the electric lines through" which power is transmitted tothe torque motor, which shall allow the press to "be manually operatable during either the entire stroke of the press, or during such a portion of the stroke that an operator will *beunable to allow his hands to .remain beneath the pressing head during the application of power.

An electric torque motor is a motor which is so constructed'and electrically connected,

which point the rotation will cease, but the coils ofthe motor will not be burned out as in most other types of motor. The torque will be continuously provided without injurious effect, until the circuit is opened. In my embodiment with the breaking of the circuit to the motor, I preferably movethe rotor in a reverse'direction until it has moved back to what was originally its starting position, so that I provide a reciprocating stroke.

The object of my invention is to so construct connecting means between the torque motor and the pressing head, that I am en- 40 motor for a pressing stroke, thereby providing a power controlled stroke which increases as the pressing head engages the buck. In order to provide the safety feature before noted, I provide a switch mounted in a fixed position on the frame of the press, and a member adapted to close the switch on one of the moving parts of the press. By arranging the position ofthe closing member so thatit will not engage the switch until an approximately closed position of the press is reached,I inhibit the possibility of an operator having his hands he neath the head at the time the torque motor is turned on. Reversely it will be within the realms of mechanical equivalency to meant.

that it will rotate when current is supplied until there is a'definite retarding load at rack.

abled to utilize the operation of the torque standard on which the pressing mechanism is -mounted. The frame has a table2 whichexthe switch on a moving member with a fixed stop to engage it at certain positions of movement.

I further provide a manually operable switch conveniently accessible near the handle, by which the press head may be manually operated so that should the operator desire to operate the press manually, he only needs to throw out the manually operable switch and the torque motor will not be operative. p 7

fy invention consists in the combination of the torque motor and the control mecharnsm by which it is engaged at certain pressing positions.

The above and other objects which will appear during the ensuing description are accomplished by that certain arrangement of parts hereinafter described.

Referring to the drawings:

Figure 1 is a plan view of a garment press in which my invention is embodied.

Figure 2 is a side elevation showing the assembly shown in Figure 1, in which a torque motor is connected by means of a segmental rack arm to actuate thepressing head.

Figure 2 is a detail showing a straight Figure 3 is a side elevation of amodification of the assembly shown in Figures 1 and 2-in which power is applied to the pressing head through a reduction gear unit. Figure 4: is an end elevation of the modification shown in Figure 3.

, Figure 5 is an end elevation of a slightly difierent type of press assembly in which the torque motor is so mounted as to actuate a horizontally movable rack which has suitable driving connections with thepresshead.

Generally indicated at 1 is the frame or tends out frontwardly and on which the buck 3 is mounted. The pressing head 4 is mounted on a rocking arm 5, which is pivotally mounted as indicated at 6 in the frame of the As indicated, the torque motor 7, may be suitably mounted on a bracket express.

tending from the frame, or the motor may be mounted directly on the frame. In thetype illustrated in Figures land 2, a lever 8 having along arm 9 is pivotally mounted in a bracket 10. The torque motor may have a gear drive 11,- which is engaged with a segmental racklEZ, which is pivoted to the long 9i With the actuation at the the long arm will be moved upwardly, carrying with it the short arm 13, which is adapted to engage a link 14, which with the pressing head approximately in pressing position will be aligned with the short arm 13. With the manual movement of the head away from pressing position, the link 14 which is pivoted to the end of the rocker opposite the pressing head is moved. by an arm 15, which is pivoted to an end '16 of the link which extends above the rocker arm. The arm 15 may be suitably mounted in a boss 17, which is extended from the'axlc 18 on which the rocker is mounted. The operation of the lever having a straight rack 12, will be similar to the mechanism shown in Figure 2 as will. be readily apparent.

In the modification shown in Figure 5, the lever 19 replaces the lever 8, shown in Figures 1 and 2 and the lever 19 is pivotally mounted in a boss 20. Connecting both the rocker arm 5 and the end of the lever 19, is a forked arm 21, which carries an adjustable stop 22 which limits the relative i'novement of the lever 19 and the arm 21 to about the position shown. The lever and the forked arm will move freely toward an angular relative position, but t-hestop 22 limits the movement of the lever and the fork into parallel alignment. A rack 23, which engages the gear on the torque motor with movement to the left, as illustrated,- will elevate the rocker 5, which will move the pressing head against the buck.

The modifications shown in Figures 3 and 4, illustrate an arrangement in which a reduction gear unit 24, is coupled with the driving shaft of the torque motor, and a cable 25 connects the driving. pulley 26 of the reduction gear unit with the end of the long arm of the lever.

As will be noted from the wiring diagram shown in Figure 5, one of the lead lines 27, connects with a switch 28, which normally is in closed position, but which may be opened by contact with the end of the manually operative plunger 29, From the switch 28, a line connects with the switch 30, which is adapted to be closed only when the lever which carries the plunger 31 is in approximately pressing position; A line connects one. side of the switch 30, with the torque motor and the other. lead line may as shown be connected with the torque motor through an adjustable resistance as indicated at 32. In Figure2, the switch 28 is connected with the motor and a line from the motor is connected with the switch 80, with which the other lead line 32 is connected.

The operation of the press is simple. An operator places a garment on the buck and moves the pressing head manually to approximately pressing position; The switch is then closed by engagement with the plunger 31, and the torque motor provides the power for the pressing operation. With the breaking of the circuit by opening the switch 28 the lever which is actuated by the motor is sufiici-entl-y heavy to pull the torque motor shaft back to its original starting position.

By connecting a rheostat in the supply line to the motor, I am able to control the torque of the motor which provides a means of controlling the power of the pressing engagement. This provides a simple way of adj 11st ing the head pressure for different types of pressing work.

Modifications in structure will readily ocour to those skilled in the art, but in so far as their modifications are within the range of mechanical equivalency, I consider them within the scope of my invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A press having a manually movable, pivotally mounted pressing head, a lever connected with said pivotally mounted head, electric motor means having a driving connection with an arm of said lever, electric lines to said motor means, a switch in one of said lines, and means of closing said switch under control of said movable head physically operatahle with a master switch in one of said lines for controlling the breaking of the circult to' said motor means during closed position ofsaid first named switch, and said clec trio mot-or means comprising a torque motor.

2. A press having a manually movable, pivotally mounted pressing head, a lever connected with said pivotal-1 y mounted head, electric motor means having a driving connection with an arm of said lever, electric lines to said motor means, a switch in one of said lines, and means of closing said switch under control of said movable head physically operatable with a master switch in one of said lines for controlling the breaking of the circuit to said motor means during closed position of said first named switch, and said electric motor means comprising a torque motor, with said lever mounted so as to reverse said motor with the opening of the circuit thereto, wh ereby a reciprocating stroke may be imparted to said pressing head.

3. In a garment pressing machine, a manually movable pressing head, and a torque motor, said head having connections therewith adapted, during the position of pressing engagement, to provide driving connections between said head and said motor, and means whereby said motor is energized only when said head is substantially in pressing position.

l. In a garment pressing machine, a manually movable pressing head, and a, torque motor, said head having connections therewithadapted, during the position of pressing engagement, to provide driving connections between said head and said motor, means said head is substantially in pressing positlon, and electric clrcuit breaking means connected 1n circult with said motor, said means adapted to break the motor circuit during the manual movement of said head away from pressing position.

5. In a press, a manually movable pressing head, a rocking arm carrying said head, a torque motor, means providing a driving connection between said motor and said rocking arm, during substantially pressing posi tion of said head, with the motor adapted to move said head to pressing position, and counterbalancing means for moving said head away from pressing position.

6. In a press, a manually movable press ing head, a rocking arm carrying said head, a torque motor, means providing a driving con- 7 nection between said motor and said rocking arm, during substantially pressing position of said head, with the motor adapted to move said head-to pressing position, and counterbalancing means for moving said head away from pressing position, and automatic control means in the supply lines to said torque motor adapted to inhibit the operation of said motor excepting in approximately pressing position.

7 In a press, a manually movable pressing head, a rocking arm. carrying said head,

a torque motor, means providing a driving connection between said motor and said rocking arm, during substantially pressing position of said head, with the motor adapted to move said head to pressing position, and counterbalancing means for moving said head away from pressing position, and automatic control means in the supply lines to said torque motor adapted to inhibit the operation of said motor during positions of said pressing head away from substantially pressing position.

8.1n a press, a pressing head, a'rocking arm carrying said head, a torque motor, means providing a driving connection between said motor and said rocking arm during substantially pressing position of said head, with the motor adapted to move said head to pressing position, and a weight counterbalancing means for moving said head away from pressing position, and automatic control means in the supply lines to said torque motor adapted to inhibit the operation of said motor during positions of said pressing head away from substantially pressing position, and controlling means for the electrical supply to said motor providing means for controlling the pressing power of the pressing head to a predetermined-degree of pressure.

GEORGE G. GRIES T.

Images