US1811880A

US1811880A - Adjusting apparatus for motion picture projection machines

Info

Publication number: US1811880A
Application number: US271092A
Authority: US
Inventors: Dina Augusto
Original assignee: International Projector Corp
Current assignee: International Projector Corp
Priority date: 1928-04-18
Filing date: 1928-04-18
Publication date: 1931-06-30
Anticipated expiration: 1948-06-30

Description

:s sheets-Sheet 1 A. DINA ADJUSTING APPARATUS FOR MOTION PICTURE PROJECTIN MACHINES Filed April 18, 192e June 30, 1931.

IN VEN TOR.

A. DINA 1,811,880

ADJUSTING APPARATUS FOR MOTION PICTUREPROJECTION MACHINES June 30, 1931.

Filed April 18, 1928 3 Sheets-Sheet 2 UvVgNToR.

A TTORNEY June 3o, 1981. A. DMA 1,811,880

ADJUSTING APPARATUS FOR MOTION PICTURE yPROJECTION MACHINES Filed April 18. 1928 v 3 Sheets-Sheet 'y INVENTOR.

BY 5 c A TTORNEY i i270 belt.

Patented June 30, 1931 UNITED YS'IA'rasi rsnsse PATIE'r .si-ics AUGUSTO DINA, OF JERSEY CITY, NEW QI'ERSEIY,V ASSIGNOR T0 INTERNATIONAL PRO.- JECTOR CORPOR-ATIN, CIT' NEVI YQRK, N. Y., A COP-.Il-ATIGN OF DELAWARE ADJUSTING- APPARATUS FOR MOTIGN PICTURE ELOJECT'ION MACHINES Application filed April 18,

'1'0 control the same with a minimum numberV of operations. YThe adjusting means must furthermore be of solid construction to prevent the apparatus from vibrating and causing a shaking of the picture. The motor support should preferably be in an accessible position and provided with means for adjusting the relative position of the motor and the driving appara-tus in order to accurately align the parts with respect to thevdriving Furthermore, the motor should be in such position that the various controls and operating parts of the mechanism are not interfered with thereby.

In accordance with the present invention, 25 a single bracket is employed for supporting` the pedestal lever adjusting screw and the motor table. This bracket is securely fastened to the pedestal at a plurality of points and is of a sufficiently solid construction to prevent unauthorized movement of the parts. The motor 'table is adjustably attached to the bracketand a limited vertical movement thereof is permitted. The motor is secured to the table in such manner that it may be moved transversely thereof, whereby any desired combination of vertical and transverse movement may be obtained for securing the same in its proper location.

The invention also consists in certain new and original features of construction and combinations of parts hereinafter setforth and claimed.

Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, the mode of its operation and the Ina-nner of its organiza- Vtion may be better understood by referring to the following description taken in connec- 1928. Serial No. 271,092.

tion with the accompanying drawings forinlng a part thereof, in which Fig. 1 is a side elevation of a pedestal Vshowing the support for the motor and for the pedestal lever adjustingscrew; 55 Fig'. 2 is arear elevation thereof, partly in section, showing the details of the pedestal lever;

Fig. 3 is a section taken along the lin-e 3 3 of Fig. 2 showing kthe pedestal and 6o supports Fig. 4 is a section taken along the lin-e 4 4 of Fig. l showing the pedestal lever adj-'usting screw; e y

Fig. 5 is a section taken along line 5 5 4of 65 Fig. 1 showing the connecting yoke;

Fig. 6 is a section takenalong the line 6 6 of Fig. 1 showing the motor table;

Fig.-7 is a section taken along the line 7 7 of Fig. 8 showing the means for clamping 70 the motor table to the supporting pin; and

Fig. 8 is a section taken along the line 8 8 of Fig.' 1 showing the clamping means for y the motor table. i

Like reference characters denote like parts in the severalfigures of the drawings.

In the following descriptionV and in the claims parts will be identified by specilic names for convenience, but they are intended to be as generic in their application to simice lar parts as the art will permit.

Referring to the drawings more in detail, a pedestal 10 is shown 'provided'with anl enlarged base 11, byv means of whiclritis supported and having a pedestal lever12 pivoted to the top thereof by bearing 1 3. Pedestal lever 12 is provided with a pluralityV of tubular members lll (Figs. 1 and 2) in which pin 15 is secured, and a pluralitj.7 of members'l engaging pin 17. Lamp house supporting arm 18 is journalled by bearings 519 on pin 15A and carries lamp house 'plate l2O vby means i of which the lamp house is supported in any well'known manner. A guiding arm (not shown) may be journalled on pin 17 for ccntrolling the horizontal angle of the lamp house. AThe particular form of lamp house support, however., forms no part of the .present invention, and will not be described in detail. 100

Bracket 21 is provided with a pair of engaging surfaces 22, by means of which it is secured to pedestal as by bolts 23. Said bracket is provided with a downwardly extending tubular bore, in which pin 24 is secured by bolts 25 which extend through drilled holes in the outside of said bracket and are threaded into said pin. Pin 24 is provided with a tapered keyway 26 which is engaged by cooperating key 27 (Figs. 7 and 8) for securing the motor table thereto.

Motor table 29 is formed with a motor supporting surface 30 having a pair of elongated slots 31 therein, through which wing screws 32 may be passed for securing motor 33 thereto. The transverse position of said motor may be varied by loosening wing nuts and moving the same in elongated slots 31.

Tubular section 34 is integrally formed with motor table 29 and is suitably drilled to pass over pin 24. Wing nuts 35 are threaded in tubular section 34 and bear against key 27 for forcing said key into rm engagement with keyway 26 and securing the motor table. Key 27 is also provided with a wedge shaped slot 36 which is adapted to be engaged by bolt 37 Vhaving a cooperating wedge shaped end and threaded into tubular section 34. Bolt 37 may be adjusted to hold key 27 firmly in keyway 26 and prevent the same from moving relatively to tubular section 34 when wing nuts 35 are loosened.

Pedestal lever adjusting screw 4() is inserted in a tubular bore in bracket 21 and secured therein between shoulder 41 and nut 42. Pin 43 may also be passed through bracket 21 and screw for further securing the assembly and preventing turning movement of said screw. Collar 44, provided with elongated hub 45 and having hand wheel 4G forming a part thereof, is threaded upon adjusting screw 40 and adapted to be moved longitudinally of said screw by means ef said hand wheel.

Yoke 47, which is firmly secured to pin 15, is provided with a pair of guiding studs 48 in the two arms thereof which engage collar 44 and determine the angular position of the pedestal lever 12. Studs 48 are secured in yoke 47 in any convenient manner by cap nuts 49. Clamping wheel 50 is carried upon shaft 51 which is ournalled in arm 52 on yoke 47 and threaded into arm 53 thereof. Shoulder 54 is adapted to bear against the face of arm 52 and permit the two arms to be bent together for clamping collar 44 between guiding studs 48 whereby relative movement of the parts is prevented after they have been adjust-ed to the desired position. Lock nut 55 (Fig. 1) may also be employed for preventing movement between hub member 45 and adjusting screw 40.

In order to adjust the angle of elevation of the projecting apparatus, set screw 55 and hand wheel 50 are loosened and adjusting wheel 46 is turned, whereby collar 44 is moved longitudinally of screw 40. Yoke 47 which is in engagement with collar 44 is moved therewith and causes pedestal lever 12 to pivot about bearing 13 on pedestal 10. After the adjustment has been obtained the parts may be locked by clamping guiding studs 48 against collar 44 and by threading lock nut 5o against adjusting wheel 46.

Motor 33 may be adjusted in elevation by loosening wing nuts 35 thereby permitting key 27 to disengage from keyway 2G. rEhe wedge shaped key provides a comparatively large contacting surface with the keyway whereby the friction thereof is considerably increased. When the key is forced into iirm engagement with the keyway by wing screws 35 it provides a particularly rigid locking means for table 29.

By supporting the motor table and the adjusting screw from a single bracket the total number of parts required for the machine is reduced. The bracket is provided with a plurality of contacting surfaces whereby it may be rigidly secured to the pedestal and by reason of which a particularly solid construction is effected.

It will be seen that in general there are many advantages in this type of construction which makes for facility of adjustment and which permits positioning the adjusting mechanisms where they are entirelyout of the way and not apt to behit by the operators. @ne of the particular features is that the adjustment of the motor table permits easy and ready taking up of any excess slack in the driving belt. It also enables the operator to install a new belt without straining it, as he may raise the table, place the belt in position and then lower the table to provide a c rrect tension in the belt.

lt-will also be seen that the various pai-ts of the bracket, adjusting rod 40 and the pin 24 may be made integral if desired, vor if produced as individual elements they may be joined together in any satisfactory manner or may be directly joined to the pedestal, but any of these mechanical equivalents are to be considered as being within the scope of the invention.

Thile certain novel features of the invention have been shown and described and are pointed out in the annexed claims. it will be understood that various omissions, substitutions and changes in the forms and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention.

`What is claimed is:

1. A motor support comprising a bracket, means for securing said bracket to a pedestal, a downwardly extending post associated with said bracket, said post being provided with a wedge shaped keyway, a motor table comprising a flat portion adapted to receive said motor and a tubular portion adapted to engage said post, a wedge shaped key secured in said tubular portion in engagement with said keyway, and means for varying the pressure of said keyway for securing the assembly in any desired position, said key having a wedge shaped slot therein and a screw threaded bolt in said tubular section and having a wedge shaped end adapted to engage said slot for preventing movement of said key relatively to said tubular portion when the pressure thereon is released.

2. A motor support comprising a bracket, means for securing said bracket to a pedestal, a downwardly extending post associated with said bracket, said post being provided with a wedge shaped keyway, a motor table comprising a flat portion adapted to receive said motor and a tubular portion adapted to engage said post, transversely extending elongated slots in said at section, means passing through said slots for securing said motor thereto, a wedge shaped key secured in said tubular portion in engagement with said keyway, and means for varying the pressure of said key in said keyway for securing the assembly in any desired position.

8. In combination with a. motor, a support therefor comprising a pin, a motor table carried by said pin, means including a wedgeshaped key and cooperating keyway for slidably securing said table to said pin, and said key having a wedge shaped slot for preventing longitudinal movement of said key with respect to said motor support and a member carried by said support and cooperating with said slot. Y A

4. A support for a projection machine comprising a Uj-shaped bracket havin a pair of fiat surfaces adapted to be attached to a pedestal, said bracket having an angularly extending bore provided with a shoulder adapted to receive an adjusting screw for controlling the angular position of said machine and lia-ving a downwardly extending tubular bore adapted to receive a pin carrying armotor table.

5. A support for a projection machine comprising a bracket having means for attachment to a pedestal, said bracket having an angularly extending bore adapted to receive an adjusting screw for controlling the angular position of said machine and Vhaving a downwardly extending bore adapted to receive a pin carrying a motor table.

AUGUSTO DINA.