US1372256A - Clock and means for winding same - Google Patents

Description

, S, STROMMER.

C LOC K AND MEANS FOR WINDING SAME.

APPLICATION FILED APR.23.1920.

Patented Mar, 22,1921.

UNITED STATES PATENT OFFICE.

SIGFRID STROMMER, OF BAYSWATER, LONDON, ENGLAND.

CLOCK AND MEANS FOR WINDING SAME.

Application filed April 23,

To all whom it may concern:

Be it known that I, SIGFRID STROMMER, a citizen of the United States of America, residing at 22 Queensborough Terrace, Bayswater, in the county of London, England, have invented certain new and useful Improvements in Connection with Clocks and Means for Winding Same, of which the following is a specification.

This invention relates to clocks and means for winding same, and in particular to clocks intended to be geared to a rotary shaft such as that of a speedometer which may be carried upon an automobile vehicle, and to be automatically wound up when such rotary shaft is put in action.

According to this invention, means are provided whereby the barrel arbor of the clock can be positively connected to and disconnected from the rotary shaft, as for example by a clutch, the engagement and disengagement of which are dependent on the movement of a stop device carried on the spring barrel of the clock, as for example a star wheel or Geneva wheel actuated by a single toothed index wheel on the said arbor.

In order that the said invention may be clearly understood and readily carried into effect, the same will. now be described more fully with reference to the accompanying drawings, in which Figure 1 represents in elevation an embodiment of the invention.

Fig. 2 is an inverted plan illustrating a detail hereinafter mentioned.

Fig. 3 is an inverted plan on a larger scale illustrating other details hereinafter mentioned.

Fig. 4 is an elevation on a still larger scale of a portion of the mechanism shown in Fig. 1.

The reference numeral 1 indicatesa rotary shaft, which shaft may be a portlon of a speedometer. On this shaft is a worm 2 engaging a worm wheel 3 on a connecting shaft 4, supported by a special cock or standard 44. At the other end of this shaft 4 is a worm 5 engaging a worm wheel 6 on a shaft 7, on which shaft 7 is also secured a toothed pinion 8 which drives a toothed wheel 9 on a countershaft 10. On this shaft 10 is also secured a toothed pinion 11 which continuously drives a toothed wheel 12 so long as the shaft 1 is rotating. This wheel 12 is mounted on a sleeve 13 ca able of sliding on the main arbor 14 of t e clock. the

Specification of Letters Patent.

Patented Mar. 22, 1921.

1920. Serial No. 376,009.

nately upright and inclined surfaces so that at any position of engagement an inclined surface on one member would be encountered by the point of a tooth on the opposing member, this facilitating full engagement. On the underside of the wheel 12 is secured a catch or forked piece of spring metal 18 adapted to en age either one of two grooves (not shown) formed in the arbor 14, and to spring from one groove to the other. the spring barrel 19 of the clock is secured a bezel 20 from which depends a bracket 21 to which is pivoted at 22 (Fig. 4) a lever 23, the free end of which is forked at 24 and embraces the neck 15 of the sleeve 13, the forks 24 being adapted to press against the larger parts of the sleeve 13 above and below them respectively in such manner as to lift or lower the said sleeve upon the arbor 14, the spring catch 18 being then moved from one to the other of the two grooves in the said arbor and by this spring action tending to keep the sleeve in the position to which it has been so moved. Projecting from the arbor 14 or from an index wheel secured thereon is a pin or tooth 25 adapted to engage successively a number of notches or recesses 26 in a star wheel 27 or Geneva wheel (Fig. 3) as the arbor or barrel rotates. In the example shown there are five of these notches or recesses so that the star wheel makes one complete revolution for each five revolutions of the arbor or barrel, and therefore if one revolution of the barrel per day is made when the clock is running down the star wheel will complete a revolution in five days. A disk 28 is formed on the boss 29 of the star wheel 27 this disk being cut through and bent up at 30 against the underside of the star wheel forming an inclined surface and another part of the disk is cut through and bent down in such manner as to form two more inclined surfaces 31 and 32, one or the other of which, according to the direction of rotation of the star wheel 27, will in the course of such rotation engage a hook 33 on the upper surface of the lever 23. Instead of parts of the disk being oppositely bent, solid parts of the boss 29 may he formed to described, as they do not constitute any part of the present improvements.

The running down of the main spring contained in the barrel 19 causes rotation of the said barrel, and by means of the tooth arotary movement is imparted to the star wheel 27 and disk 28; after four or live revolutions of the barrel the inclined surface 31 of the disk 28 engages the hook and causes it to be lifted on to the edge of the disk. The lever 23 therefore lifts the sleeve 13 and engages the clutch member 16 with the clutch member 17, and as the wheel 12 is continuously driven in consequence of the rotation of the shaft 1, rotation is now imparted to the arbor, causing the star wheel to move in the reverse direction, so that the clock is wound. up, it the speedometeris in action. Up to this point, the barrel has only run down to the extent of four or live revolutions, but the spring retains power to run for a further four or five revolutions, it the speedometer meanwhile remains inactive, during this time leaving the winding mechanism in position to begin re-winding as soon as the speedometer is again started. The complete winding up of the clock-thus corresponds to a movement of about nine teeth of the star wheel 27 and before one'revolution of the 1 star wheel is completed the inclined surface 30 engages the back or" the hook 33and presses the said hook under the edge of the disk so that the lever 23 falls into the position shown in Fig. l, that is, to the extent permitted by the length of the neck 15 but not sufiiciently to cause the disengagement of the clutch members. The winding therefore continues during nearly another revolug tion or" the star'wheel and disk, when the inclined surface 32 reaches the back of the hook- 03 and presses it down, so that the sleeve lrflispr'essed down against the resistance orthe spring catch '18 until the said catch engages the lower groove in the arbor 1% and the clutch members are disengaged. As the'main spring runs down or slackens whilethe clock is running, the direction of,

rotation of the star wheel and its disk are reversed until after about four revolutions of the barrel and the actuation by the tooth 25-01% the star wheel to the extent of about four notches, the point or the inclined surface 31 again engages and lifts up the hook 33, so that the clutches are rengaged and re-winding begins. Thus a reserve of about five days" running power of the clock is maintained, assuming that each complete revolution of the arbor 14: corresponds to one days work of the clock. For example, assuming the clock to be connected to a speedometer carried on an automobile V6? hicle the clock will run for about nine days while the vehicle is standing still orthe speedometer disconnected, and the hook 33 said arbor, a second clutch member slidably mounted on the said arbor and adapted to be continuously rotated by positive connections from the said rotary shaft, a star wheel carried by the said barrel and intermittently rotated by an index tooth secured to the said arbor, and a pivoted lever controlled by the said star wheel for positively sliding the saidsecond clutch member into and out of engagement with the first named clutch member.

2. In a clock provided with a spring barrel and barrel arbor, the combination of a rotary shaft, a clutch member secured on the said arbor, a second clutch member slidably mounted on the said arbor and adapted to be continuously rotated by positive con nections from the said rotary shaft, a star wheel carried by the said barrel and intermittently rotated by an index tooth secured to the'said arbor, a pivoted lever operatively connectedto the second clutchmember and provided with a hook, a disk carried by the said star wheel and having bent projecting portions respectively directed toward and away from the said star wheel, the said hook lying in the path of rotation of the saidprojecting portions and being alter- .nately lifted and depressed thereby in such manner as to cause the engagement and disengagement of the clutch.

3. In a clock provided with a spring bar-' rel and barrel arbor, the combination of a rotary shaft, a clutch member secured on the said arbor, a second clutch member slid:-

to be continuously rotated by positive connections from the said rotary shaft, a star wheel carried bythe said barrel, means for transmitting from the said arbor to the said star wheel a partial rotation uponeach complete rotation of the barrel or arbor, and a disk controlled by the said star wheel and carrying three inclined surfaces adapted to engage successively a hook operatively con nected to the said second clutch member into and out ofengagementwith the first named clutch member after a series of revolutions ofthe said arbor or barrel. 1

SIGFRTD STROlWMER.

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