US1263465A - Mechanical movement. - Google Patents

Description

R. B. PRENTICE. MECHANICAL MOVEMENT.-

APPLICATION FlLED FEB- 8. 19H.

,Afifi lcfa tented Apr. 23,1918.

INVENTOR WITNESSES BYv ATTORNEY nnur srnns ran on RUDOLPH PREN'I'ICE, 0F FALL RIVER, MASSACHUSETTS.

MECHANICAL MOVEMENT.

Specification of Letters Patent.

Patented am. as, rare.

Application filed. February 8, 1917. Serial No. 147,431.

T) all whom it may concern): 1

Be it known that l[, RUDOLPH B. Pannrion, a citizen of .the United States, residing at Fall River, in the county of Bristol and Stateof Massachusetts, have invented oer to provide simple and efficient means where by reciprocatory motion may be transformed into rotary motion or rotary motion may be transformed into reciprocatory motion. A further object is to provide a rotatable disk or the equivalent in combination with a system of levers and links so connected to the disk as to impart rotary motion thereto whenpower is applied to this system, or to impart reciprocatory motion to a member connected to thissystem when power is ap plied to the disk so as to cause rotation thereof. A further object, is to provide a movement which is well adapted for use as an escapement for chronometers. A further object is to provide a movement which may be actuated by power applied thereto so as to cause uniform rotation of the disk. Further objects will appear from the detail description.

The single figure of the drawings is a front view of a movement constructed in accordance with my invention as applied to a chronometer escapement disk.

' A shaft 1 is rotatably mounted in a hanger 2, a disk 3" being keyed on this shaft. Disk 3. is provided with an eccentric pin 4, A link 5 is pivotally secured atits upper end to pin d and at its lower end to an arm 6 which is pivotally secured at its upper end to a fixed pin 7 for oscillation about a fixedv axis. The lower end of link 5 is pivotally secured to the lower end of arm 6, as at 8. A link 9 is pivotally secured at its inner end to the eccentric pin 4 and at its outer end to the inner end of a lever 10, as at 11. Lever 10 is pivotally mounted at its longitu dinal center on a fixed pin 12 for movement a rod 13, as at 141-. The lower end of rod 13 is pivotally connected to the lower end of a rod 15, as at 16, the upper end of which is pivotally connected to the lower ends of ink 5 and arm 6. As will be noted, the links5 and 9, and the arm 6, are all of the same length, and the fixed pins 7 and 12 are positioned on opposite sides of the disk 3 are in alinement diametrically of the is r. i

This movement is also well adapted for use in connection with chronometers, being especially useful as an escapement mechanism by means of which the usual anchor and pallet may be eliminated thus giving a noiseless escapement. In the drawings I have shown my movement as applied to a rotatable disk 3" which may be considered as the escapement wheel of a chronometer. The outer end of this link is pivotally secured by a pin 23 to the upper end of a counter-weight rod 24 which is pivoted adjacent its lower end on a fixed pin 25 for oscillation about the same. A counterweightf26 is secured on the lower end of this lever and serves to counterbalance a pendulum 27 the upper end of the stem of which is pivotally secured on the pin 23,

the usual pendulum bob or weight 28 being secured on this stem. In using my move ment as an escapement mechanism, the disk 3 is rotated in the direction indicated. As the disk is rotated, theeccentric pin t is raised. When this pin is raised the link 5 is subjected to tension, thus tending to fold the toggle arm composed of rod 15 and arm 6 inward so as to shorten the same and move link 5 and arm 6 into longitudinal alinement. When rod 15 is raised rod 13 will be moved toward the right as considered from the figure of the drawings so as to depress the outer end of lever 10 and raise the outer end of link 9. This movement of the rod 13 subjects the link 9 to tension, the

combined'pressure on link 9 and tension on link 5 serving to move the rods 13 and 15,

and the members connected thereto, into the positions indicated by the dot and dash lines. This movement of these members is opposed by the pendulum 27, and is assisted by the counter-weight 26, until the counterweight rod 2 1 has been moved past the verits extreme position B, this movement being opposed by the counter-weight 26. The counter weight and the pendulum .thus act in opposition to insure smooth operatlon of the escapement. By varying the length of the pendulum and of the counter-weight rod 24 this opposition to the rotation of disk 3 maybe adjustedorregulated so as to give the desired speed 'of rotation to suit "the particular chronometer in connection with which this escapement is used. As the forces operating the rods 13 and 15 are exerted along lines in opposite directions these forces tend to oppose each other so as to establish a more or less equalization of forces thus insuring smooth and uniform rotation of the escapement disk S I When the pendulum has been moved into its extreme position in either direction the rotation of disk 3 will be momentarily checked "thus giving an intermittent escapement asi'n the standard clock or chronometer; In the drawings the pendulum is shown in its extreme position toward the left, as considered from the drawings.

, VVhen the pendulum is in this position, the i links 9 and 10 are on dead center and further rotation of the disk is prevented until the pendulum 27 has reached its extreme position toward the left, the force of the pendulum when swinging in this, direction tending to raise the rod 13 so as to cause the line of tension exerted on link 9 to pass below the axis of the disk and reverse the direction'ofrotation this force exerted by the rod 13 being counteracted by a force acting in an opposite direction longitudinally of link5 tending to cause rotation of the disk in its original direction of rotation due to the straightening of the, toggle arm composed of the arm 5 and link 6, and the forward movement of this toggle arm with the pendulum/ By this means, when the pendulum isswung into its extreme position toward the left the rotation of disk 3 is momentarily checked, the, disk being locked againstrotation until the pendulum starts on its movement toward the right so as to permit reverse movement of the rods 13 and 1 5, and the various elements connected thereto, thus again rotating the disk until the links 5 and 6 have been brought into alinement so as to be on dead center thus again checking the rotation of disk 8, as indicated in the drawings. Thi movement of the operating links and rods insures a uniform rotation of the escapement disk 3, the disk being checked momentarily after each half rotation thus giving an escapement well adapted for use in chronometers. This operation of the disk is smooth and accurate, the disk being moved through an arc of 180 in uniform time, and this operation of the disk being independent of, and not in any way influenced by, the spring motor or other means employed for rotating the disk.

* By means of the differential pendulum which is composed of the counter-weight 26 and rod 24:, and the pendulum 27 and 28,

the beat of a pendulum of any length may be duplicated by relative adjustment of the counter-weight and the pendulum bob thus permitting quick and easy adjustment of the escapement to suit the particular chronometer in connection with which it is used.

What I claim is 1. In mechanical movements, a rotatable disk, an eccentric pin secured on said disk, a toggle lever pivoted at its upper end for oscillation about a fixed axis, a link pivotally secured at one end to the pin-and at the other end to said toggle lever intermediate the ends thereof, a lever pivotally mounted intermediate its ends for movement about a fixed axis, the pivot of said lever being positioned at the opposite side of the axis of the disk to the pivot of the toggle lever, a link pivotally secured at its inner end to said eccentric pin and at its outer end to the inner end of said lever, and means for intermittently oscillating said lever and toggle about their respective axes in the same direction, the direction of movement of said lever and toggle being alternately reversed whereby the links are urged in the same direction and have their direction of movement alternately reversed so as to permit rotary motion of the disk.

2. In mechanical movements, a disk, an eccentric pin, a lever pivotally mounted intermediate its ends for movement about a fixed axis, an arm mounted at its upper end for oscillation about a fixed axis, the axis of said arm and lever being equi-distant from the disk and in alinement diametrically of the same, a link pivotally secured at its outer end to the inner end of the said lever and at its inner end to said eccentric pin, a link pivotally secured at its inner end to the eccentric pin and at its outer end to the lower end of said arm, the two said links, and the arm all being of approximately the same length, a rod pivotally scoured at its upper end to the lower end of said arm, a rod pivotally secured at its upper end to the outer end of said lever and at its lower end to the lower end of the rod eonnected to. the arm, a counter-weight rod mounted for oscillation about a fixed axis intermediate its ends, a counter-Weight mounted on the lower end of said rod, a connecting link pivotally secured at one end to the upper end of the counter-Weight rod and at the other end to the lower ends of the rods connected to said lever and arm and a pendulum pivotally secured to the upper end of said counter-weight rod for oscillation relative thereto.

In testimony whereof I afiix my signature in presence of two Witnesses.

RUDOLPH B. PRENTICE. Witnesses:

HENRY T. MARTIN, CHAS. G. Ronnnrs.

topics of this patent may be obtained tor five cents each, by addressing the w lilttflomtt' ot mttntt,

Washington, D. W

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