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Publication numberUS2129641 A
Publication typeGrant
Publication dateSep 13, 1938
Filing dateSep 25, 1935
Priority dateSep 25, 1935
Publication numberUS 2129641 A, US 2129641A, US-A-2129641, US2129641 A, US2129641A
InventorsBaughman John, Venetta John
Original AssigneeBaughman John, Venetta John
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Lighting device
US 2129641 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

' p 3, 1938. J. BAUGHMAN ET AL 2,129,641

LIGHTING DEVICE Filed Sept 25, 193s 2 Sheets-Sheet 1 NH 1 Inventor:

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A ttorney Sept. 13, 1938.

J. BAUGHMAN ET A1. 2,129,641

LIGHTING DEVICE Filed Sept. 25, 1955 2 Sheets-Sheet 2 Z 9 I? 22 a flwaarih A Home};

Patented Sept. 13, 1938 PATENT ()FFHQE LIGHTING DEVICE John Baug-hman and John Venetta, Warren,


Application September 1 Claim.

This invention relates to devices for casting colored lights upon a stage scenery or the like and the object of the invention is to provide a device of this character characterized by the simplicity of construction and operation as well as efiiciency.

Briefly the invention consists in the provision of a light source and a plurality of colored trans: parencies which may be individually and selecm tively placed between the light source and the scene upon which the light is to be cast so that first one color and then another color light may be cast upon the scene, stage or the like.

Further in accordance with the present invention a plurality of pivotally mounted arms are provided, and each arm is equipped with a colored transparency, and can be readily swung into alinement with the light source for quickly changing the color of the light beams being cast upon the object to be illuminated.

The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein:

Figure 1 is an elevational view of a device embodying the features of the present invention.

Figure 2 is a vertical sectional view through a casing illustrating certain details hereinafter more fully referred to.

Figure 3 is a horizontal sectional view through the casing.

Figure 4 is a wiring diagram and Figure 5 is a fragmentary detail sectional view of the latch means for holding an arm in a raised position.

Referring to the drawings by reference -numerals it will be seen that the device comprises a casing '5 having a side wall extension 6 in which is suitably mounted an incandescent lamp 1.

Supported between opposed walls of the casing 5 is a pivot shaft 8 upon which are mounted two or more arms 9 for swinging movement about the shaft 8 as a pivot. On one end the arms 9 are provided with adjustable weights l9 secured at the desired adjustment by set screws H. On the opposite or free end thereof the arms 9 are provided with frames l2 in which are suitably secured transparencies iii of glass, paper or other suitable material. The frames l2 are so arranged that when an arm 9 is swung upwardly the transparency i3 will be placed in alinement with the incandescent lamp '2 so that the rays of light will in color correspond to the color of the transparency l3.

For each arm 9 there is provided and suitably 25, 1935, Serial No. 42,098

mounted in the bottom of the casing 5 an electro-magnet I 4 and an armature 15. The armatures l5 are pivoted on a common shaft It and are connected with the respective arms 9 through the medium of links ll. It will thus be seen that when the circuit through the selected magnet I4 is completed the associated armature i5 will be caused to move downwardly thus causing the proper arm 9 to swing vertically upwardly to place the transparency l3 associated therewith in line with the light bulb l. Obviously when the circuit through the magnet M is interrupted the weight of the arm 9 and the frame equipped end l2 thereof will overcome the action of the weight I0 so that the arm 9 will swing vertically downwardly to the position shown in Figure 2.

Also for each arm 9 there is provided a latch member is and the latch members H3 are pivoted on a common shaft l9 and are equipped at their pivoted ends with lateral projections connected together by an armature 29 controlled by a single electromagnet 2| mounted in the top of the casing 5.

The latches I8 are provided with suitable heads with which are engageable lateral pins 22 pivoted on the arms 9.

From the description of the invention thus far, it will be apparent that to raise a selected arm 9 for aligning the transparency l3 associated therewith with the bulb 1, the circuit through the proper magnet I4 is closed. As the arm 9 swings upwardly its latch pin 22 will engage with its complemental latch member !8 and the arm will thus be held in raised position.

When it is desired to change the colors of the light beam the second arm 9 is raised in identically the same manner as that described with regard to the first arm 9 and obviously as the second arm 9 moves to raised position its latch pin 22 riding over the irregular edge of the head of the associated latch member 59 will cause the latch members l8 as a unit to swing in a clockwise direction thus releasing the first arm 9 as the second arm 9 moves into its fully raised position. Thus it will be seen that as one arm is raised, the previously raised arm will be released to return to its normal position. A

When it is desired to release the raised arm 9 without efiecting a raising of the other of the arms 9, the circuit through the magnet 2| is completed for attracting the armature 29 resulting in a swinging movement of the latch members H3 in a clockwise direction for releasing the pin 22 of the raised arm thus permitting the latter to swing to its lowered position.

For controlling the circuits through the magnets Hi there are provided suitable switches 23 while a switch 23a is provided for controlling the circuit through the magnet 2|. Obviously, by manipulating the proper switches 23 and switch 23a the above operations are effected for varying the colors of the light beams cast on the stage or other objects to be illuminated.

Further in accordance with the present invention, the casing 5 is mounted for rotation in a horizontal plane on the upper end of a shaft 24 journaled in a suitable bracket 25 mounted on a platform 26. For driving the shaft 24 there is provided an electric motor 2! in driving engagement with the shaft 24 through the medium of suitable gearing 28.

The electric motor 27 is of the reversible type and for reversing the motor 21 there is provided, in circuit with the motor, a. pair of contacts 34, 35 between which operate one end of a suitably and pivotally mounted armature 36 biased to engage the contact 34 through the medium of a spring 31. The armature 35 is controlled by a magnet 38 arranged in the magnetic circuits hereinbefore referred to and controllable by a switch 29.

The armature 36 is also electrically connected with an armature 3| that is pivotally mounted on the platform 26 at one end of the armature shaft of the motor 21 The armature 30 is cooperable with a contact 39 arranged in the main supply circuit for completing the circuit through the motor 21. The armature 3| is also controlled by a magnet 32 arranged in the aforementioned magnetic circuit and is controlled by a switch 33.

The armature 3| is normally biased out of engagement with the contact 39 through the medium of a spring 49, and on one side thereof the armature 3| is provided with a brake shoe 30a that is normally urged into engagement with a brake wheel 39 on the last mentioned end of the armature shaft of the motor 2'! for applying a braking action thereto.

It will thus be seen that to cause a rotation of the housing 5 switch 33 is closed for completing the circuit through the magnet 32. The magnet 32 being thus energized attracts the armature 3| against the action of spring 40 for engaging the armature with the contact 39 thus completing the circuit to the motor thru the inter-engagement of the armature 3| and contact 39 and through the interengagement of the armature 36 with the contact 34 so that the motor 2'! is driven in one direction. In this connection it will be noted that the movement of the armature 3| under the influence of the magnet 32 and against the action of spring 45 will move the brake shoe 39a out of engagement with the brake wheel 39 thus relieving any braking action on the motor 21.

When it is desired to reverse the direction of swinging movement of the housing 5 switch 29 is closed subsequent to an opening of the switch 33. Upon closure of switch 29 the circuit is completed through the magnet 32 for again releasing the motor 21, and the circuit is at the same time completed through the magnet 38 for attracting the armature 36 moving the latter out of engagement with the contact 34 and into engagement with the contact 35 so that the circuit to the motor 2'! is completed through the contact 39, armature 3|, armature 36 and contact 35 for driving the motor 21 in a reverse direction.

It will thus be seen that by a manipulation of the switches 29 and 33 the casing 5 may be caused to oscillate for casting the light beam across the stage or objects to be illuminated, first in one direction and then in a reverse direction.

From the above it will be apparent that a device of this character will be especially adapted for use in theaters and the like as illuminating means for stages, etc.

Having thus described our invention, what we claim as new is:'

A device of the class described comprising a casing having an open part, a lamp supported by the casing and having its rays passing through said open part, an elongated lever pivoted intermediate its ends in the casing, a screen at one end of the casing which in one position of the lever will extend in front of the lamp, a weight on the opposite end of the lever, means for adjusting the same, a horizontally arranged member pivoted at one end in the casing, a link connecting the other end of the member to the lever between the pivotal point thereof and the weight, an armature carried by the member, a magnet located below the armature for attracting the member to move the lever to a position where the screen will come in front of the lamp, a latch member pivoted in the casing, a projection on the lever in front of the pivotal point engaged by the latch to hold the lever in screening position and magnetic means for moving the latch to releasing position.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4298920 *Jun 7, 1979Nov 3, 1981Lewis GluckAutomatic gel changer for a spotlight
US4600976 *Feb 25, 1985Jul 15, 1986Michael CallahanColor changer mechanism
US4618918 *Jun 3, 1985Oct 21, 1986Ilya ZhabokrugUniversal filter changer for theatrical lights
U.S. Classification362/284, 362/281, 362/293, 362/85, 359/889, 362/295
International ClassificationF21S8/00, F21S2/00
Cooperative ClassificationF21W2131/406, F21S2/00
European ClassificationF21S2/00