US1102921A - Raising and lowering mechanism for curtains. - Google Patents

Description

HODGES.

RAISING AND LOWERING MECHANISM FOR CURTAINS.

APPLICATION FILED JAN. 14, 1914.

0 Patented July Ti, 1914!.

Z SHEETS-SHEET 1 I. HODGBS.

APPLICATION FILED JAN.14,1914.

LXQQ QQBQEN wwweoow WW 5m i IRENE nonons, OF SAN FRANCISCO, CALIFORNIA.

RAISING AND' LOWERING MECHANISM FOR CURTAINS.

Specification ofLetters Patent.

Patented July 7, 1914.

Application filed January 14, 1914. Serial No. 812,078.

To all whom it may concern:

Be it known that I, IRENE Honors, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Raising and Lowering Mechanism for Curtains, of which the following is a specification.

This invention relates to raising and lowering mechanism for theater curtains, window shades or the like; and it has for its primary object the provision of electrically controlled mechanism for winding the curtain on or unwinding the same from its supporting roll and for automatically retarding the rotation of the roll instantly on the requisite adjustment, of the curtain.

With the above and other objects in view, the invention consists of certain novel features of construction, combination and. a rrangement of parts, as will be hereinafter described and claimed.

In the accompanying drawings :Figure 1 is a front view of the curtain conventionally showing the application of the windingand unwinding mechanism thereto; Fig. 2 1s a side view of the controlling motor; Fig. 3 is a section, taken on line 33 of Fig. 2; Fig. 4 is a front view of the strip; Fig. 5 is a side view thereof; and Fig. 6 is a diagrammatic view, illustrating the mantionally illustrated at G while the ner of connecting the motor respectively in' to be extended. The axis or shaft 1 ofthe' 'roll A is connected at 2 with a motor 3,,

and as illustrated in Fi 6 said motor is connected in a field clrcuit E and an armature circuit F, the armature being convennets are shown at H. Contact posts II are connected with the terminals of the field circuit, and as shown these posts are associated with similar posts J-J of a switch K, the latter being clearly illustrated in Figs. 4 and 5. The said posts J are connected through the leads K?-K' with the field circuit E, while connected through the armature circuit are posts LL, on which Switch blades M-M are secured, as at N. These blades are preferably disposed in parallel relation and they are adapted to extend overthe posts I -I and JJ and to be spaced therefrom normally, as shown in Flg. 5. For this reason the blades MM are constructed preferably of strips of flat sheet spring metal that are .adapted to normallyvbe in fiat condition but which are adapted to be flexed at their ends so as to be thrown reslpectively into engagement with the contacts I and J-J. The said strips M.M are connected with each other by insulatlng blocks 0-0, which are provided intermediate of their ends with handles P. In the circuit E is a solenoid 4, the core 5 thereof being normally held in an extended position by means of a spring 6. This core 1s connected at 7 to links 8, and in turn these links are pivoted to rocking brake 1eyers 9 that terminate in brake shoes 10 havingconcavities 11 which accommodate the perlpheral surface of a friction wheel 12 mounted on the motor axis 2.

With particular reference to Figs. 1, 5

and 6 of the drawings it will be seen by the manual depression of the switch K by the lower handle P the blades M will be moved nto engagement with the contacts I--I, closing the electric circuit and causing the current to be taken from the main line and con- Veyed to the field circuit and through the solenoid so as to energize the same and through the armature circuit so that the brake shoes 10 will be released from the friction brake wheel 12 and the shaft 1 revolved to cause an unwinding of the curtain as will be understood. The contacts J-J are reversely connected to the field circuit with respect to the contacts 1-1, so a depression at the opposite handle P of the switch K, bringing the same into engagement with the contacts J-J, thus reverses the direction of the current through the field and, as a consequence', the curtain will be drawn onto the roll. Immediately on moving the switch to an open circuit position, the solenoid will be influenced under the action of the springs 6 and the brake shoes 10 will be instantly moved to applied osition. The circuit F may be rovided with an ordinary switch S to cut off the circuit from the mam line or to direct the circuit therethrough as desired.

From the foregoing description, taken in .3 and the minor details of construction may he resorted to without departing from the principle or sacrificing any of the advantages of this invention as claimed.

I claim 7. 1. The combination with a revolubly mounted roll and a curtain Wound thereon, of electrically controlled means for respectively winding and unwinding the curtain, and meansautom-atically operated on adjustment of the curtain to a predetermined position for holding the supporting roll thereof against rotation and comprising means actuated directly through the said electric circuit.

20 2. The combination with a revolubly mounted roll and a curtain wound thereon, of electrically controlled means for respectively winding and unwinding the curtain, and means automatically operated on adjustment of the curtain to a predetermined position for holding the supporting roll thereof against rotation and comprising means actuated directly through the said electric circuit having normally active shoes engaging the axis of the roll and movable to inactive positions on closing the circuit.

3. The combination with a revolving roll having a curtain Wound thereon, of electrically operated means for respectively winding the curtain onto and off of the roll and consisting of a motor connected with the roll, an electric circuit connected with the motor, means for determining the direction of movement of the current through the circuit to cause the curtain to be respectively Wound onto and unwound from said roll, and a solenoid in the circuit, a brake wheel on the axis of the motor and shoes cooperating with the wheel and controlled through the sole noid.

In testimony whereof I affix my signature in presence of two witnesses.

IRENE HODGES.

Witnesses:

ALICE HARTLING, J. J. FINN.

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