US1946700A

US1946700A - Shutter shaft support

Info

Publication number: US1946700A
Application number: US425176A
Authority: US
Inventors: Kindelmann Albert
Original assignee: International Projector Corp
Current assignee: International Projector Corp
Priority date: 1930-02-01
Filing date: 1930-02-01
Publication date: 1934-02-13
Anticipated expiration: 1951-02-13

Description

Feb. 13, 1934. KmDELMANN 1,946,700

SHUTTER SHAFT SUPPORT Filed Feb. 1, 1930 2 Sheets-Sheet 1 0 O O O O 5 O Q Q N a INVENTOR 6/680 fi lha e/ino'nn ATTORNEY Feb. 13, 1934.

A. KINDELMANN 1,946,700

SHUTTER SHAFT SUPPORT Filed Feb. 1, 19 30 2 Sheets-Sheet 2 INV ENTOR ATTORNEY Patented Feb. 13, 1934 UNITED STATES PATENT OFFICE SHUTTER SHAFT SUPPORT Application February 1, 1930. Serial No. 425,176 Claims. (Cl. 118-193) This invention relates to a new and useful imhead.

provement in supports for shutter shafts with particular reference to motion picture projection machines of more or less standard type and which 8 are to be modified to support a. shutter at the rear of the head instead of at the front, and to do so without altering the construction of the machine to any material extent.

A main object of the invention is to provide 10 a simple, compact, durable, and efficient support which may readily be applied to a standard type of projection machine without requiring material alteration thereof and with the smallest additional expense to permit a variation in the supls port of the shutter from that permitted in the standard construction especially where the shutter is to be supported at the rear of the projection head in a machine primarily arranged to support it at the front of the head.

A further object is to provide a support which can be readily applied to the projector without disturbing the usual construction of the parts and without preventing access to such parts thereof as is essential at all times after the im-' proved support is attached to the machine.

A further object is to provide a strong durable support which may be quickly and firmly attached to the supporting wall of the projector to support the shutter in a new arrangement so that the parts are firmly related and the tendency to vibrate is reduced to a minimum.

Further and more specific objects, features, and advantages will more clearly appear from. the detailed description given below when taken in connection with the accompanying drawings which form part of the specification and which illustrate a present preferred form of the inven- The invention in general terms comprises a support preferably in the form of a casting having a main body or wall with a plurality of spacing walls or elements disposed preferably at right angles thereto to space the main wall or body from the supporting wall or partition of the projection head to which it is to be attached.

. This body portion is preferably provided with spaced journal elements thereon preferably along the lower edge. One of these journal elements, it is found desirable, shall be elongated not only to provide a bearing for the shutter shaft but also to provide a single integral journal for supporting the shutter guard casing which is generally disposed adjacent the head of the machine at a position very near to where the shutter shaft projects and preferably at the rear of the Means are provided to secure the casting firmly to the main partition in the head and to prevent lateral and vertical shifting thereof after it is attached in place. The spacing means is so located that the body of the support is disposed suiiiciently far from the adjacent partition .to permit access by the operatortov the parts disposed therebehind for adjustment and oilin the same. The support for this new shutter shaft is such that the shaft can be driven from the gearing ordinarily designed to drive the shutter at the front of the projection head.

The drawings which illustrate the present preferred form of the invention consist of several figures in which,

Fig. 1 is a side elevation of a'projector head with the shutter support applied according to this invention;

Fig. 2 is a plan view of the shutter by itself;

Fig. 3 is a side elevation of the support; and,

Fig. 4 is a cross section through the support on the line 4-4 of Fig. 3.

The present preferred form of the invention shown in the drawings is adapted to be attached to a motion picture machine, preferably a proso jector such as is shown in Fig. 1. This machine has a projection head with a central supporting wall or partition 10. On this wall or partition practically all of the operating mechanism of the machine is mounted. In the ordinary and, usual type of projector the shutter is mounted at the front of the machine in front of the head and is generally supported on a shaft such as 11 which has thereon a bevel gear such as 12 driven by any suitable connections from the main preferably vertical drive shaft 13 such connection generally being the bevel gear 14. This simple gear connection would permit the opera tion of the shutter shaft when the shutter is supported from the front of the head.

The problem up to the present time has been to employ this same drive mechanism and adapt it with a minimum of alteration to drive a shutter shaft, on which the shutter is supported-from the rear of the head. In order to accomplish this result the ordinary shutter shaft .11 is provided with a gear 15 as shown in Fig. 1 which is adapted to mesh with a gear 16 on the additional shutter shaft 17. This shutter shaft extends ac oss the machine parallel to the partition 10 and spaced from and separate from the ordinary shutter shaft 11 above mentioned. In order tofirmly and securely support this extra shutter shaft 1'! there is provided a casting with abodyportionhavingamainwall 18 whichis 11o generally disposed parallel to and spaced well away from the partition wall 10 of the head of the machine. The

ends

19 and 20 of this casting are preferably bent at right angles thereto and there is also usually provided an intermediate spacer arm 21 at right angles to the main wall 18. These ends 19 and 20 and this intermediate arm 21 extend from the main wall 18 and rest against the partition or supporting wall 10 of the head to accurately space the casting from the partition 10 and to form a strong and secure support for the shutter shaft 17. Any suitable means may be employed for holding the support in place. For instance, bolts such as 22 extend from suitable holes 23 in the casting to the parti-- tion wall 10 to thus hold the casting in proper position.

In order to properly support the shutter shaft 17 in a relation to the partition 10 that will permit it to be spaced far enough therefrom not to interfere with the other apparatus on the machine and at the same time to project rearwardly through the head so that the shutter will operate at a desired position at the rear of the head instead of the front there has been provided on the casting 18 preferably along its lower edge journal elements such as 24 and 25 spaced well apart to receive the shaft 17 and firmly and securely support it. The journal 25 is extended laterally toward the rear of the head of the projector in the form of an extended journal element 26 and this extension extends through the rear wall of the head and acts as a journal for the support of the shutter guard casing 27. In this manner the entire shutter shaft unit is firmly and accurately and securely supported from the one element which is designed to hold it in exactly the proper relation to the other parts of the drive mechanism so that the shutter shaft 17 may be properly driven quietly and efliciently and with a minimum of vibration and without in any material way interfering with the disposition or operation of the other parts of the mechanism.

The invention therefore herein presented in its present preferred form, involves a simple, compact, strong, and durable, and efficient element which is economical to manufacture, easy to install, readily replaced or repaired, and will securely and accurately dispose the additional shutter shaft in the proper manner to operate the shutter at the rear of the head without disturbing the arrangement and operation of the other usual mechanisms on the head and without requiring but very slight alteration of the parts of the machine to adapt it for use with this new arrangement of shutter and support. This support in no way requires changes to be made in the gear trains and readily permits the mounting of a shutter at the rear of the head and to adjust such a mounted shutter during its normal operation just the same as the shutter ordinarily mounted at the front of the head.

While the support is preferably a casting, it is to be understood that formed metal pieces may be assembled and employed.

While the invention has been described in detail and with respect to a present preferred form thereof it is not to be limited to such details and forms since many changes and modifications may be made and the invention embodied in other forms and modifications without departing from the spirit and scope of the invention in its broadest aspects. Hence it is desired to cover any and all forms and modifications which may come within the language or scope of any one or more of the appended claims.

What is claimed, is,

1. In a motion picture machine having a mechanism supporting partition, a detachable shutter shaft supportng plate disposed parallel to and spaced substantially from said partition shaft supporting journals on said plate, a plurality of spacing walls of substantial depth and extending from said plate to said partition to space said plate from said partition and by reason of their substantial depth insuring rigid positioning of said plate on said partition, and means to fasten the plate to the-partition.

2. In a motion picture machine having a mechanism supporting partition, a detachable shutter shaft supporting plate disposed parallel to and spaced substantially from said partltion, shaft supporting journals on said plate, a plurality of spacing walls of substantial depth at the ends of the plate and extending from said plate to said partition to space said plate from said partition and by reason of their substantial depth insuring rigid positioning of said plate on said partition, and means intermediate said spacing walls to fasten the plate to the partltion.

3. In a motion picture machine having a mechanism supporting partition, a detachable shutter shaft supporting plate disposed parallel to and spaced substantially from said partition, shaft supporting journals along the lower portion of the plate, a plurality of spacing walls of substantial depth and extending from said plate to said partition to space said plate from said partition and by reason of their substantial depth insuring rigid positioning of said plate on sai partition and means to fasten the plate to the partition.

4. In a motion picture machine having a mechanism supporting partition, a detachable shutter supporting plate disposed parallel to and spaced substantially from said partition, shaft supporting journals along the lower portion of the plate, a plurality of spacing walls of substantial depth at the ends of the plate and extending from said plate to said partition to space said plate from said partition and by reason of their substantial depth insuring rigid positioning of said plate on said partition, and means intermediate said spacing walls to fasten the plate to the partition.

5. In a motion picture machine having a mechanism supporting partition, a detachable shutter supporting plate disposed parallel to and spaced substantially from said partition, a shaft supporting journals along the lower portion of the plate whereby the shaft is disposed parallel to the partition and spaced therefrom, a plurality of spacing walls of substantial depth disposed at the ends of the plate and extending from said plate to said partition to space said plate from said partition and by reason of their substantial depth insuring rigid positioning of said plate on said partition, a spacer arm disposed intermediate the ends of the plate and extending from the top of the plate and adapted to contact with the partition, and means intermediate said spacing walls to fasten the plate to the partition.

ALBERT KINDELMANN.