US1334468A - Rotating ratchet - Google Patents

Description

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PORTER S. MORGAN, F NORWALK, CONNEOTICUT.

ROTATING RAT-CHEZ?.

Specification of Letters Patent.

Patented Mar. 23, 1920.

Application filed April 26, 1918. Serial No. 230,932.

"To all whom t 'may concern Be it known that l, PORTER S. MORGAN, a citizen of the United States, and a resident of Norwalk, in the county of Fairfield and State of Connecticut, have invented certain new and useful Rotating Ratchet-s, of which the following is a specification.

My invention relates to ratchets and has for its object the provision of a ratchet that has no lost motion, that does not disengage itself from the ratchet wheel or bar even when reversed; that is quiet; that is rapid and positive; that is much stronger than the present ratchets.

The several objects stated above and others that will appear are now to be descl'ibed and are illustrated in the accompanying drawings forming a part of this specification.

Similar characters of reference denote like or corresponding parts throughout the several views of which Figure 1 is a side elevation of my invention; Fig. 2 is an end view of the gear train operating the ratchet and Fig. 3 is a section of my reversing mechanism.

Referring particularly to F ig. 1 of the drawings, numeral 1 represents a ratchet wheel secured to the shaft 2 and having gear shaped teeth 3 adapted to mesh with 'the single helical thread rotary ratchet a. This rotary ratchet is secured to the shaft 5 and the shaft is journaled in the frame 6 which straddles the ratchet wheel 1 and is centered by the shaft 2. Secured to shaft 5 is a collar 6a to which is secured one end of a helical spring 7, the other end of which is secured to a miter gear 8 which is loosely mounted on the shaft 5. Projecting from the frame 6 are two arms 9 and 10 in which is journaled the shaft 11 carrying secured to it the gear wheel 12 which meshes with the ratchet wheel 1. Arm has a right angle projecting arm 13 (see Fig. 2) which serves as a journal support for the miter gear 111 and the spur gear 15, both secured to a shaft. Shaft 11 carries a gear 16 which meshes with gear 15.

The frame 6 is adapted to oscillate through the angle A, B, C by the rotation of the crank 16a and the connecting rod 17 which is pin connected at 18 to the frame 6.

The operation of my invention is as follows: The spring 7 is given an initial torsional twist in the direction of the arrow 19 which will give the ratchet 4 a tendency to rotate in the same direction; now if the crank is turning as shown, the frame G will be moving in the direction of the arrow 20. As the frame moves it relieves the pressure of the ratchet teeth against the wheel teeth and permits the spring' to rotate the ratchet which will continue as the frame moves forward; the initial spring torsion being maintained by the gear train 12, 16, 15, 111 and 8 through the ratchet wheel 1 remaining stationary. When the frame 6 starts to move from C to A the spring torsion prevents the ratchet from rotating and the ratchet wheel is moved in the direction of the arrow 21.

As the operating direction of the ratchet is determined by the direction of the springs initial torsional twist, Fig. 3 illustrates how this feature may be utilized to obtain either direction at will. The shaft 5 to which the ratchet is secured has a longitudinal slot 22. The collar 6a to which the spring 7 is attached has a sleeve extension 23 and a helical slot 24: through which a pin 25 passes, being held in the shifting collar 26. The miter gear 8 is loosely mounted on the sleeve 23 and is secured to the free end of the spring 7 at 27. In operating this reversing mechanism, the collar 26 is slid along the sleeve 23 by any well known means and in moving the pin from one end of the slot 22 to the other the proper initial directional twist is given the spring to determine the direction of free rotation of the ratchet.

As the spring keeps the operating faces of the teeth always in contact no backlash will occur when the frame reverses its direction and as the ratchet can be made very light in weight it will operate at high speeds. Also as there may be several teeth in operation great strength is assured. In operating with a variable crank throw it will move the ratchet wheel through the smallest possible angle as the rotation of the ratchet correspends to a micrometer movement.

I-Iaving thus fully described my invention so that anyone skilled in the art may make and construct the same and without limiting myself to any of the details of construction shown, I claim:

1. A ratchet wheel, a helical toothed recipe rocatory ratchet member in mesh therewith, a spring under initial tension for moving the ratchet member and means connected to the ratchet wheel for maintaining the said initial tension.

2. A ratchet wheel, a helical toothed reciprocatory rotatable ratchet member in mesh therewith, a spring under initial tension for rotating the ratchet member and means connected to the ratchet wheel for maintaining the said initial tension.

3. A ratchet wheel, a helical toothed reciprocatory rotatable ratchet member in mesh therewith, a spring under initial torsion for rotating the ratchet member and means connected to the ratchet wheel for maintaining the said initial torsion.

4. A ratchet wheel, a helical toothed reciprocatory ratchet member in mesh therewith, a spring under initial tension for moving the ratchet member and means connected to the ratchet wheel for maintaining the said initial `tension in either-direction.

5. A ratchet wheel, a helical toothed recipi rocatoryv rotatable ratchet member in mesh therewith, a spring under initial tension for rotating the ratchet member and means connected to the ratchet wheel for maintaining the said initial tension in either direction.

6. A ratchet wheel, a helical toothed reciprocatory member in mesh therewith, a spring under initial tension for moving the ratchet member and means connected to the ratchet wheel Jfor maintaining the said initial tension.

Signed at New York city, in the county oi New York and State of New York this 7th day of March, A. D. 1918.

PORTER S. MORGAN.

Witnesses MABEL M. GLAssnY, HAROLD T. Knorr.

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