US1237042A - Leaf-turner. - Google Patents

Description

G. W. HOKE.

LEAF TURNER.

APPUCATION FILED JULY 25, \916- 1,237,042. Patented Aug. 14, 1917. I 2 SHEETS-SHE Tl.

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G. W. HOKE.

LEAF TURNER. APPLICATION FILED JULY 25. 1916- 11,237,042. Patented Aug. 1 1, 1917.

2 SHEETS-SHET 2.

\ z s' z. l 22 m 4 h? 20 5 d /7 4 J '1 \(9 1 fi GEORGE W. HOKE, OF ELIZABETI-I,- INDIANA.

LEAF-TURNER.

To all whom it may concern Be it knownthat I, GEORGE W. I-IoKn, a citizen of the United States, residing at Elizabeth, in the county of Harrison and State of Indiana, have invented new and useful Improvements in Leaf-Turners,- of which the following is a specification.

This inventionrelates to leaf turners for automatically turning the leaves of a musical composition for instance in their proper successive order'and without necessitating the operator to pause during the rendition of the music to turn the leaves.

The actuating mechanism for all of the leaf carrying elements is tripped by a single key thereby eliminating the necessity of se lecting the respective key for releasing the respective leaf carrying member, as is the case in many leaf turners having a plurality of keys for releasing the leaf carrying ele ments. I

Another characteristic of this invention is a spring motor for actuating the leaf carrying elements to turn the leaves, the elements being automatically relieved of the influence of the motor when it is desired to return the leaves to their normal position.

Another object of this invention is to pro vide a device of this character which contains the desirable features of simplicity, durability and efficiency, and furthermore a device which may be manufactured at a nominal cost.

Another object of this invention is to pro vide a leaf turner comprising a rotatable disk, and means carried by the leaf carrying elements and engageable with the disk whereby the elements may be moved to turn the leaves, the means being so arranged as to successively engage the disk as the leaf carrying elements are successively released.

Other objects of the invention will appear asthe specification is read in connection with the accompanying drawings, in which Figure 1 is a front constructed in tion; *ig. 2 isa longitudinal vertical sectional view of Fig. 1;

Fig. 3 is'a" central transverse on the line 33 of Fig. 1' v Fig. 4 is a top plan view, partly in section of the operating mechanism Fig. 5 is adetail view of the disk 5 elevation of my device accordance with the invensection taken Specification of Letters Patent. Application filed July 25, 1916.

Patented Aug. 14, 1917. Serial No. 111,209.

Fig. 6 is a. transverse section takenon the line 66 of Fig. 1. eferring: to the invention comprises cated at A. which is drawings in detail, my a base generally indiformed of any suitable material and which is preferably rectangular information. The-base A is provided on its upper side with 'a circular recess 1: in which is mounted an upstanding shaft which is of such a length as to extendabove the upper side of the base as is clearly shown in the drawings. 1 Loosely mounted upon the shaft 2 adjacent its lower end and within the recess 1 is a toothed gear 3, the teeth being arranged upon the outer periphery thereof. The base A is formed with a recess a which is adapted to communicate with the recess 1 and in which is mounted a-spring motor 13 of any suitable type, the'latter being provided with a driving gear 4" which is iii-mesh with the gear 3. 1=To wind the spring of the motor B "I have provided the base 1 with anopening 5throug-h which extends the shaft 6, the outer end of the shaft being provided with a key 7 while 'its inner end is provided with a gear 8 which is in mesh with a gear 8 on the spring barrel of the motor to wind the spring as will be understood.

Secured to the upper'side of the gear 3 and arranged concentrically o'f'the' shaft 2 is a disk generally indicated as atC which is formed of 'any suita-ble metal and which is of a diameterslightly less than that of the gear 3. "The disk C is provided uponits periphery at diametrically opposite points with extending sli'ts 9, a adjacent'the slits being upstruck to provide the teeth 10, which are arranged in reversed directions as is clearly shown in the drawings. The front of the base A is provided adjacent the recess l 'withthe longitudinally disposed bracketll, of any-"suitable form, upon which is pivotallymounted the releasing lever 12. The releasing lever 12 is pivoted between its ends upon the bracket 11, its inner end extending throughthe wall of the recess 1 and bent downwardly as at 13 to'provide the stud 14. Itwill be noted that the stud 14 is disposed adjacent the periphcry of the'disk G-and is-normally'ada-pted to engage one of the teeth '10 to lockthe disk against rotation as will be hereinafter described. The outer end of preferably bent downwardly portion of the disk' and has its free terminal provided with a button whereby the lever may be rocked upon the bracket 11 to move the stud 14: into and out of engagement with the teeth 10. The disk C is further provided at opposite points with projections 16 which are preferably formed by slitting the disk radially and upstriking one wall of the slit. The projections are arranged reversely of each other and are preferably recessed at 17 so as to receive the nose of the pawls as will be hereinafter described.

Loosely mounted upon the shaft 2 at a point above the disk C are a plurality of cylindrical sleeves 18, I having shown in this instance only two, which are of different diameters and lengths, and are arranged one within the other as is clearly shown in the drawings. The innermost sleeve is longer than the outer sleeve and projects both above and below the opposite ends of the outer sleeve. The lower ends of the sleeves carry radially extending arms 19 of different lengths the arms having their outer ends provided with pivoted spring pressed pawls 20, the pawls being in this instance of scalene triangular formation, the springs being of the spiral type and so arranged upon the arms as to normally cause one part of the pawls to engage the disk C as will be hereinafter described. To prevent accidental removal of the sleeves from the shaft 2, I have provided the latter at its upper end with a transversely extending pin 21, be-- tween which and the longer sleeve is a washer 22 whereby the friction between the sleeves during their swinging movement will be minimized. Formed upon the sleeves 18 adjacent their upper ends are the leaf carrying frames 23 which are of any suitable construction and which extend radially from the sleeves to permit the swinging movementof the same above the base A. The sheets of music or other leaves to be turned are respectively connected with these frames by clips or other means indicated at C and forming no part of the present invention.

As previously stated the pawls 20 are adapted to engage the disk C under the action of the springs, the pawls being arranged directly above the respective recesses 17 of the projections 16 and having one of their ends extending into the recesses whereby upon rotation of the disk, the pawls will engage the projections to move the arms 19 to cause the leaf carrying frames to be moved from right to left as will be understood. The arms 19 are disposed one above the other which necessitates the pawl upon the upper arm being larger than the one upon the lower arm so that when the arms are arranged in their starting position on the right side of the shaft 2, the pawl upon the lower arm will be engaged by the upper arm so as to cause the lower pawl to be rocked upon its pivot against the tension of its spring and thereby held out of engagement with the respective projection, while the upper pawl Wlll engage such projection and rotate with the disk when the latter is released.

To limit the swinging movement of the arms and to throw the pawls out of engagement with the projection 16, I have provided the base A upon the top thereof with the stop arm 2a which extends over the recess 1 and is adapted to engage the upper end of the pawls 20 after the leaf carrying frames have reached the end of their stroke in turning the leaves.

In practice, the leaf carrying frames are arranged at the right side of the shaft, the outermost pawl 20 having its lower end en gaging one of the projections 16 and lying within the respective recess 17, it being understood that the disk is so arranged as to dispose the projections longitudinally of the base when in abutting position. The arms 19 being arranged in superposed relation, the upper arm will engage the upper end of the lower pawl and hold the pawl out of engagement with the disk so that only one of the pawls will be in engagement with the disk when the latter is released. As previously stated the projections are disposed longitudinally of the base which will necessarily dispose one of the teeth 10 as to engage the stud 14 whereby the disk will be locked against rotation. When downward pressure is exerted upon the button 15, the lever 12 will be rocked upon the bracket 11 thereby causing the stud 14 to move upwardly so as to disengage the front tooth 10 whereby the spring motor will actuate the gears 3 and 4. to rotate the disk in a clockwise direction or from right to left. The outermost pawl 20 being in engagement with one of the projections 16, upon rotation of the disk, the pawl and the respective arm will be swung upon the shaft and to the left side of the shaft so as to cause the frame carried by the respective arm to be shifted from right to left to turn the leaf. The arm and pawl having completed the stroke, the respective pawl will engage the trip arm 24 so as to move the pawl out of engagement with the projection 16. This permits the disk to continue its movement until the remaining tooth 10 upon the disk will have completed a half cycle and will. engage the stud 14 and thus prevent further rotation of the disk. When the upper arm is initially moved from the right side or the starting position, it will disengage the upper end of the lower pawl 20 thereby allowing the pawl to engage the disk under the action of its spring so that when the disk is again released by moving the stud upwardly, the said pawl will engage the other pro'ection formed upon the disk. When the isk is pelling again released it Will carry the lower pawl and arm to the left side of the shaft, the operation being identical with that of the upper arm and pawl. Thus it Willbe seen that the pawls are automatically caused to successively engage the projections upon the disk to move the respective arms and frames to the left side of the shaft. By means of the trip arm 24, the pawls will be actuated to automatically disengage the disk to permit the free rotation of the same after the arms have completedtheir strokes.

It will be seen from the foregoing that I have provided simple and eflicient means for automatically and successively turning the leaves and that the leaves may be moved to their starting positions or from left to right without necessitating a reverse movement of the prime mover or spring motor and thus preventing consequent weakening or breaking of the leaf carrying frames and the releasing mechanism.

It is thought from the foregoing taken in connection with the accompanying drawings that the construction and operation of my device will be apparent to those skilled in the art, and that minor changes in the size, shape and proportion and minor details of construction may be made without departing from the spirit and scope of the appended claims.

IV hat I claim is 1. In a leaf turner, the combination with a disk mounted on an upright shaft and having upstruck projections, means for imthe rotation of the disk, devices for checking such rotation, and manually operable means for tripping said devices; of leaf-carrying frames j ournaled on said shaft above the disk and each having an arm, the arms standing in an upright series when the parts are at starting position, pawls respectively carried by the arms and of such lengths that their tips may be engaged by any projection, said arms holding all pawls but that on the uppermost arm of the series out of such engagement while such arms remain. in starting position, and a stop for dis engaging any pawl from a projection after its arm has made a half revolution.

2. In a leaf turner, the combination with a disk mounted on an upright shaft and having upstruck projectionsat diametrically opposite points, means for impelling the rotation of the disk, devices at diametrically opposite points for checking the rotation of the disk after it has made a half revolution, and manually operable means for tripping said devices; of two leaf-carrying frames journaled on the shaft above the disk, arms respectively carried by the frames and standing in alinement when the parts are at starting position, pawls respectively carried by the arms and of such lengths that their tips may be engaged by either projection, the upper arm holding the pawl on the lower arm out of such engagement while such arms remain in starting position, and a stop in the path of the pawls for disengaging either from a projection after its arm has made a half revolution.

3. In a leaf turner, the combination with a disk mounted on an upright shaft and having upstru ck projections at diametrically opposite points, upstanding teeth at diametrically opposite points midway between the projections, means for impelling the rotation of the disk, a stud in the path of and engaged successively by the teeth to interrupt such rotation, and means for manually moving the stud out of interrupting position of two leaf-carrying frames journaled on the shaft above the disk, arms respec tively carried by the frames and standing in alinement when the parts are at starting position, pawls respectively carried by the arms and of such lengths that their tips may be engaged by either projection, the upper arm holding the pawl on the lower arm out of such engagement while such arms remain in starting position, and a stop in the path of the pawls for disengaging either from a projection after its arm has made a half revolution.

4:. In a leaf turner, the combination with an upright shaft, a power driven gear journaled thereon, a disk carried by the gear and having upstanding projections and upstanding teeth between the projections, a stud in the path of and engaged successively by the teeth to interrupt the rotation of the gear and disk, and means for manually moving the stud out of interrupting position; of sleeves independently and rotatably mounted on said shaft, a leaf-carrying frame and an arm projecting from each sleeve, the several arms being of different lengths, a pawl mounted on the other end of each arm and of a length to be engaged by a projection, springs urging the pawls into such engagement, and a fixed stop projecting over the disk at a point ninety degrees beyond the stud in the direction of the rotation of said disk and in position to disengage the pawls from the projections.

In testimony whereof I aflix my signature.

GEORGE W. HOKE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. G.

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