US1803929A - Overwinding preventer for spring motors - Google Patents

Description

y 1931. .1. P. ZAIDAN OVERWINDING PREVENTER FOR SPRING MOTORS l Filed Aug. 16, 1930 Joye/ A 7 2% ammo/1 8 Patented May 5, 1931 UNITED STATES JOSEPH P. ZAIDAN, OF SCRAN'ION, PENNSYLVANIA OVERWINIDING PREVENTER FOR SPRING MOTORS Application filed August 16, 1930. Serial no. 475,736.

My invention relates to overwinding preventers for spring motors and more particularly to an overwinding preventer for a spring motor of the type used to operate phonographs and the like.

An object of my invention is to provide a device adapted to be applied to spring motors generally, and one that will prevent overwinding of the motor springs.

Another object of my invention is to provide an overwinding preventer in which the spring winding spindle is prevented from further rotation after a predetermined number of turns.

Still another object of my invention is to provide a device in which the stop mechanism is released and the parts brought back to the starting position when the motor spring unwinds.

- Yet another object of my invention is to provide an overwinding preventer consisting of but few parts; one that is strong and sturdy in construction and not liable to get out of order even after long and continued use.

With these and other objects in View, which may be incident to my improvements, the invention consists in the parts and combinations to be hereinafter set forth and claimed, with the understanding that the several necessary elements, comprising my invention, may be varied in construction, proportions and arrangement, without departing from the spirit and scope of the appended claims.

In order to make my invention more clearly understood, I have shown in the accompanying drawings means for carrying the same into practical efiect, without limiting the improvements in their useful applications to the particular constructions, which for the purpose of explanation, have been made the subject of illustration.

In the drawings:

Figure 1 is a side elevational view, partly in section, showing my device in combination with a motor used to operate a phonograph.

Fig. 2 is a plan view of the arrangement shown in Figure 1.

Fig. 3 is an end view showing the position of the parts of the overwinding preventer when the motor spring is wound.

Fig. 4 is a plan view of a modification of my device as used in combination with the spring of a clock mechanism. v

Fig. 5 is an elevational view of the arrangement shown in Fig. 4.

Fig. 6 is a detailed view of the winding handle.

Referring to the drawings, and more particularly to Fig. l, I have shown my overwinding preventer in combination with a spring motor of the type used with phonographs or other talking machines.

The motor 1 is mounted upon a suitable base 2 to which is attached a support member 3 having vertical arms 4 and 4: Extending through suitable openings in the vertical arms are motor spindles 5 and 6 which are adapted to support the motor between the arms of the support member 3.

The spindle 5 for winding the motor spring is provided with lugs or projections 7 adapted to fit into recesses 8 formed in the winding key or handle so that the handle may be connected with the spindle when it is desired to wind the spring.

Mounted upon the arm 4: by means of bolts or rivets 9 is a gear support member 10 having an opening adapted to receive a suitable shaft 12 of a gear 13. The winding key or handle is provided with a projection 9 adapted to mesh with gear 13, and move it a. distance of 1 tooth for each revolution of the handle when the motor spring is being wound. The gear 13 is provided near its periphery with a projection or extension member 14 which projects a suitable distance from the plane of the gear so that the projection will engage with the support member 10 and prevent further rotation of the gear at certain points of its travel.

\Vhen the winding handle is rotated, projection 9 engages with the gear 13 and turns it through a distance of 1 tooth for each revolution of the handle. After the gear has been turned through a certain number of degrees, the extension 14 engages with the support 10 and prevents further rotation of the gear and thus limits the rotation of the winding spindle. In practice, the gear 13 is so designed with relation to the particular spring of a motor that the stop 14 will encounter the support 10 before the spring is entirely wound.

Attached to the base 2 are vertical support members 15 which form a three point support arrangement for a plate 16. The plate may be attached to the supports 15 by any suitable means, however, a convenient method of fastening the plate is to drill the supports and attach the plates to the members by means of screws 17. On the underside of the plate 16 there is mounted a gear 18, in mesh with gear 13 and adapted to rotate upon its shaft 18 when gear 13 is turned by means of the projection on the winding handle.

The spindle 6 which is rotated when the motor spring unwinds, carries a gear 19 which is splined to the spindle or otherwise attached to it so that the gear rotates with the spindle.

Near the periphery of gear 19 there is attached an arm 20 having a portion 21 adapted to engage with gear 18 and move gear 19 through a distance of 1 tooth when the portion 21 is at its highest point during the rotation of the spindle. It will thus be seen that when the motor spring unwinds, spindle 6 is rotated'together with gear 19. The arm 20 is carried around underneath the motor and back to the position shown in the drawings. Once during each revolution, the arm 20 engages with gear 18 and moves it through a. distance of 1 tooth.

In the operation of my device, the handle member is placed in position on the extension 5, so that the projections 7 formed on the extension fit into the recesses in the winding handle. The handle is rotated, thus turning the winding spindle and for each revolution of the handle, the projection 9 moves gear 13 through a distance of 1 tooth. Gear 13 which is in mesh with gear 18 rotates gear 19 which moves freely about its point of support.

After a predetermined number of turns of the handle, the projection 14 on the gear 13 engages with the support member 10 and prevents further rotation.

When the motor is released and put into operation, the spindle 6 is rotated and turns gear 19 with it. During its travel, arm 21 encounters gear 18 and moves it a distance of 1 tooth during each revolution. Gear 19,

= p which is in mesh with gear 13 also turns gear 13 through a distance of 1 tooth. In this manner, after the spring unwinds, gear 13 is rotated so that the projection 14 is carried away from the support 10 and brought back to the starting position when the spring is completely unwound.

Referring to Figs. 4 and 5, I have shown my overwinding preventer in combination with a spring of a clock mechanism.

In this arrangement, the winding spindle 22 is provided with a projection 23 adapted to engage with gear 24 and turn the gear through one tooth for each revolution of the spindle. It will be noted that projection 25 carried by gear 24 extends outwardly from the periphery of the gear. and is of sufficient length to encounter a vertical pin or stop member 26 attached to the frame of a clock mechanism.

When the clock spring is being wound, spindle 22 is rotated and projection 23 turns gear 24 through one tooth foreach revolution. After a predetermined number of turns of the spindle, projection 25 encounters the stop 26 and further rotation of the spindle is prevented.

As the spring unwinds, projection 23 turns gear 24 in a direction opposite to that in which it was turned during the winding operation and moves projection 25 away from the stop member 26 back to its starting position.

The number of teeth on gear 24 will be de termined by the particular spring with which the overwinding preventer is used. The gear is so designed that after a predetermined number of turns of the winding spindle, projection 25 will encounter the stop member just before the spring is completely wound so that overwinding is prevented.

While I have shown and described the preferred embodiment of myinvention, I wish it to be understood that I do not confine myself to the precise details of construction herein set forth, by way of illustrations, as itis apparent that many changes and variations may be made therein, by those skilled in the art, without departing from the spirit of the invention, or exceeding the scope of the appended claims.

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

1. Inrcombinat-ion with a spring motor, an overwinding preventer for the motor spring comprising, a gear member adapted to be rotated by the winding key, support means for said gear and a member associated with the gear adapted to'prevent further rotation of the gear after a predetermined number of turns of the winding key. i

2. In combination with a spring motor, including its supporting frame, an overwinding preventer for the motor spring comprising, a gear adapted to be rotated by the winding key, a projection on the motor support frame, and means associated with the gear adapted to engage with the projection on the motor frame after a predetermined number of turns of the winding key.

3. In combination with a spring motor, including its supporting frame, an overwinding preventer for the motor spring comprising, a gear adapted to be rotated by the winding key, a projection on the motor support frame, and an extension attached to the gear adapted to engage with the projection on the motor frame after a predetermined number of turns of the winding key.

4. In combination with a spring motor, an overwinding preventer for the motor spring comprising, a gear member adapted to be rotated by the winding key, support means for said gear, a member mounted upon the gear and adapted to engage with the gear support means after a predetermined number of turns of the winding key, a second gear in mesh with said first gear and means to rotate the second gear when the motor spring unwinds, whereby the support engaging member on the first gear is moved away from the gear support.

5. In combination with a spring motor, an overwinding preventer for the motor spring comprising, a gear member adapted to be rotated by the winding key, support means for said gear, a member mounted upon the gear and adapted to engage with the gear support after a predetermined number of turns of the winding key, a second gear in mesh with the first gear, an extension arm associated with the motor unwinding spindle adapted to en gage with the second gear and rotate said gear when the motor spring unwinds, whereby the support engaging member on the first gear is moved away from the gear support.

6. In combination with a spring motor in cluding its support, an overwinding preventer for the motor spring comprising a gear member adapted to be rotated by the winding key, support means for said gear, a projection mounted upon the gear and adapted to engage with the gear support after a predetermined number of turns of the winding key, a second gear in mesh with the first gear, a support plate for said second gear, an extension arm associated with the motor unwinding spindle, and adapted to engage with the sec-- ond gear and rotate said gear when the motor spindle unwinds, whereby the projection on the first gear is moved away from the gear support.

7 In combination with a spring motor including its support, an overwinding preventer for the motor spring comprising, a gear member adapted to be rotated by the winding key, support means for said gear mounted upon the motor support, a projection attached to the gear and adapted to engage with the gear support member after a predetermined number of turns of the winding key, a second gear in mesh with the first gear, a support plate signature.

JOSEPH P. ZAIDAN.

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