US1782274A - Clock-actuated calendar - Google Patents

Description

Nov. 18, 1930. E. SAHNER 1,782,274,

CLOCK ACTUATED CALENDAR Filed June 4, 1929 [urea/or:

Patented Nov. 18, 1930 UETED STATES EMIL SAHNER, OF SACKIN GEN, BADEN, GERMANY CLOCK-AGTUATED CALENDAR Application filed June 4, 1929, Serial No. 368,255, and in Germany June 4, 1928.

Clock actuated calendars are known having an annual band or tape the guide rollers of which are released daily by the hand clockwork and, after a certain rotation corresponding to the moving on of the calendar band by one day, are again locked.

The invention relates to a releasing device for such clock actuated calendars and consists of a resilient locking lever, the point of which engages in a hole of one of the guide rollers, said lever being raised every day from the roller by a release elem nt hingedly mounted in a groove of the 2 1 hour wheel and thereby releases this guide roller for a revolu tion to be effected by a separate clockwork mechanism. After being released the looking lever engages with a guide groove behind the releasing element and jumps into the locking hole.

An embodiment of the invention is illustrated by way of example in the accompanying drawing, in which Fig. 1 shows the calendar clockwork with partly removed casing in front elevation,

Fig. 2 is a section on the line IIII of Fig. 1 with some parts removed by the section in dash-and-dotted lines.

Fig. 3 shows the releasing element in several positions.

An ordinary 36 hour clockwork is used. A

toothed wheel a is fixed on the shaft of the hour hand of the clock. A tooth wheel Z) of twice the diameter of the wheel a engages with the wheel a, so that the wheel I) only makes one revolution every 24 hours.

A resilient locking lever 0 having a clepression and a point at one end is loosely mounted on the shaft of the wheel I). A triangular catch (Z is pivotally mounted on the underside of the tooth wheel Z) and passes through the same. Every 24 hours the catch at passes under the locking lever c and lifts the point of this lever out of a hole in the N roller 6 The roller 6 has a reduced portion intermediate its ends. A small hole is provided on the left edge of the reduced portion with which the point of the locking lever 0 engages. A groove extends from this hole once round the roller to the other end of the reduced portion. An ordinary spring motor 9 is arranged on a frame 7 adapted to be wound with a key from the side of the clock. The tooth wheel h mounted on the springcase drives a pinion i also mounted on the frame f. The axle of this pinion i L has a square opening in which the axle of the roller engages. The transmission of the rotary movement to the other rollers is effected in known manner. The mechanism operates as follows: 611

The wheel 6 is meshed with the wheel a so that the releasing element cZ, when the hand reaches the position of 12 midnight, slides under the locking lever 0 and disengages same from the roller 6 As soon as the point is clear of the hole in the roller 6 the locking lever is pulled to the right by a suitably ar ranged spiral spring m, and slides under its own spring force on the roller.

As soon as the disengagement has been ef- 79 fected the spring motor 9 drives the pinion 2' and consequently winds the annual or calendar band. As soon as the locking lever 0 reaches. the groove in the roller 6 it falls therein. As the roll is rotated to the rear in conjunction with the roll 6 and the calender band the locking lever is led back to the left by the groove whereby it tips forward and out of its path the releasing element d and again engages in the hole at the end of 30 the groove. The rollers become stationary after exactly one revolution and the new date is visible through a glass window a. If the band is to move at midday instead of at midnight, owing to the stopping of the clock, the clock is moved on 12 hours. If the clock has stopped for a considerable time the button p of the releasing element Z is depressed and the band is wound until the proper date is registered.

Wmt I claim, is:

A releasing device for a clock actuated calender, comprising in combination with an annular band driven by a spring motor, a guide roller over which said annular band passes having a helical groove terminating in a hole, a resilient locking lever actuated by the clock and having a pointed end adapted to normally engage in said hole, a wheel driven by the clock and having an aperture, 109

LII

a releasing element pivotally mounted on said Wheel and in said aperture and adapted to lift said locking lever every twenty-four hours from said hole and a spiral spring adapted to pull said locking lever away from said hole, whereby said spring motor isreleased to operate and the point of said looking lever fails into said 'he lioal I groove of said guide roller to be guided back into the hole in said roller and to stop the said spring motor.

In testimony WhereofI have hereuntoset my hand. 7

EMIL S H B-

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