US2525865A - Safety means for treadle operated machinery - Google Patents

Description

2 Sheets-Sheet l z a 2 z. a o 33 b33332 IZI- Q Q Q Q Q Q 5. a w fi 4 MM Oct. 17, 1950 H. T. CHISOLM ET AL 2,525,865

SAFETY MEANS FOR TREADLE OPERATED MACHINERY Filed May 17, 1946 2 Sheets-Sheet 2 I u rent/11 arZI. 6746 -51 mes JY. Harv-25 y W 6 4a dllo meys Patented Oct. 17, 1950 SAFETY MEANS FOR TREADLE OPERATED MACHINERY Howard '1. Chisolm and James A. Harris, Meridian, Miss.

Application May1'7, 1946, Serial No. 670,638

3 Claims.

This invention relates to improvements in safety appliances, especially adapted for use in conjunction with treadle operated machinery.

Heretofore, machine operators, especially those running shirt creasing machines and other foot treadle controlled machine have been subject to the jeopardy of persona1 injury, due to the likelihood of accidentally catching a hand in the pressing apparatus, or burning himself due to accidental machine.

The, present invention contemplates the provision of means which prevents the accidental operation of the treadle controlled machine, except when both hands of the operator are in a safe position.

A very important object of the invention is to provide hand release knobs, operating detent means for the usual treadle, which necessitates the use of both hands of the operator for removing the detent means from a blocking position with respect to the treadle, before the treadle can be operated.

These and other objects and advantages of the invention will become apparent to the reader of the following description.

In the drawings Figure 1 is a fragmentary vertical sectional or haphazard operation of the view through a work tab e, showing the safety appliance in front elevation.

Figure 2 is an enlarged fragmentary detailed sectional view through the spring and knob means;

Figure 3 is a fragmentary vertical sectional view through the detent means;

Figure 4 is a horizontal sectional view taken substantially on line 4-4! of Figure 3;

Figure 5 is a fragmentary vertical sectional view taken on line 5-5 of Figure 3;

Figure 6 is an end elevational view of the treadle base and detent means with the near connecting rod removed.

Referring to the drawings, reference character A denotes the work table of a pressing machine,

such as a shirt creasing machine, while reference character B denotes a treadle for operating this type of machine, the same having the usual operating element C extending therefrom.

As is apparent in Figures 1 and 3, a base 5 is provided at its ends with upstanding pairs of l 2 corner, as at 9, to define a, shoulder Hi, forming an abutment for the treadle B, when th treadle B is not being safely operated.

' Figure 3 shows that the outer edge of the block 5 i has a pair of threaded openings II for receiving machine screws 12, serving to attach an angular bracket 3 to this edgeof the detent block. 5. The bracket !3 is of L-shape with its feet portion disposed outwardlyand twisted as at M. The twisted portion is formed with an opening to receive the lower lateral portion 15 of. a connecting rod section it and a cotter pin may be employed for preventing displacement of these parts.

The connecting rod sections it extend upwardly and interlap the lower inwardly off set portions ll of connecting rods !8, and collars l3 embrace these overlapping parts and through the medium of a set screw 26, these interlapping parts are firmly clamped together.

The upper ends of the connecting rod sections 18 are connected by eyes 2i to eyes 22 at the lower ends of plunger rods 23, which as is shown in Figure 2, extend upwardly entirely through barrels 24, which depend from the bottom of the work table A in suitable spaced relation with respect to each other.

The lower end of each barrel 24 has an attached cap 25, apertured to receive the corresponding plunger rod 23, while an intermediate portion of each plunger rod 23 carries a washer 26, held in place by cross pin 2i and between which and the cap 25, a coiled compression spring 28 is interposed. The purpose of the spring 28 is to hold the rod sections I 6 and I8 elevated in order that the detent blocks 7 will be cushion washer 32, which is capable of absorbing ears 6, t and between each pair of ears 6, t a m detent block 7 is pivotally mounted, the same beshock when it strikes the cap 25.

In the operation of this appliance, the operator, in order to free the pedal B, must necessarily push downwardly on each knob 3 I simultaneously other words, his hands must be occupied in effecting releasement of the detent means, before his foot can operate the treadle to put the machine in operation, and thus maintaining both hands occupied, there can be no haphazard or accidental operation of the treadle, such as might cause injury to the operator, should his hand or hands be in a dangerous position with respect to the pressing element.

As is apparent in Figure 3, the base 5 may have openings therein for receiving anchoring bolts or other securing elements.

While the foregoing description sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention what is claimed as new is:

1. In the machine of the character described comprising an operators table, a treadle for controlling the-machine, a pair of swingable detents for normally holding the treadle against accidental operation, a pair of elongated rod lines extending from the table and operatively connected to said detents, guide tubes projecting from the table and through which the rod lines operate, each of said rod lines being provided with an abutment, located within the corresponding tube and a compression spring on each rod line interposed between the bottom of the corresponding tube and the adjacent abutment.

2. In the machine of the character described comprising an operators table, a treadle for controlling the machine, a pair of swingable detents for normally holding the treadle against accidental operation, a pair of elongated rod lines extending from the table and operatively connected to said detents, guide tubes projecting from the table and through which the rod lines operate,

each of said rod lines being provided with an abutment, located within the corresponding tube and a compression spring on each rod line interposed between the bottom of the corresponding tube and the adjacent abutment, said rod lines extending above said table and provided with handles at their upper ends.

3. In the machine of the character described comprising an operators table, a treadle for controlling the machine, a pair of swingable detents for normally holding the treadle against accidental operation, a pair of elongated rod lines extending from the table and operatively connected to said detents, guide tubes projecting from the table and through which the rod lines operate, each of said rod lines being provided with an abutment, located within the corresponding tube and a compression spring on each rod line interposed between the bottom of the corresponding tube and the adjacent abutment, said rod lines being divided into sections and means for adjustably connecting of the sections together to determine the throw of said lines.

HOWARD T. CHISOLM. JAMES A. HARRIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,016,395 Brown Feb. 6, 1912 1,147,670 Bassett July 20, 1915 1,401,7 i4 Watson Dec. 27, 1921 1,441,099 Lawrence Jan. 2, 1923 1,475,l11 Gries et al Nov. 20, 1923 1,527,925 Schade Feb. 24, 1925 2,020,839 Kahn Nov. 12, 1935 2,225,708 Myerson Dec. 24, 1940

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