US1811881A

US1811881A - Base for motion picture projection machines

Info

Publication number: US1811881A
Application number: US281870A
Authority: US
Inventors: Dina Augusto
Original assignee: International Projector Corp
Current assignee: International Projector Corp
Priority date: 1928-05-31
Filing date: 1928-05-31
Publication date: 1931-06-30
Anticipated expiration: 1948-06-30

Description

A. DINA BASE FOR MOTION PICTURE PROJECTION MACHINES June 30, 1931.

Filed May 51', 1928 INVENTOR.

A ATTORNEYS.

Patented June 30, 1931 UNITED STATES PATENT OFFICE if .AUGUSTO DINA, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO INTERNATIONAL BRO- JECTOR CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE BASE FOR MOTION PICTURE PROJECTION MACHINES Application filed May 31, 1928. Serial No. 281,870.

This invention. relates to motion picture apparatus and more particularly to a new and improved base for supporting the various parts thereof. v i The invention provides a base for machines of the above type which includes a plurality of widely separated feet having adjustable means for contacting with a floor or other supporting surface. The feet are so arranged ,and located that a comparatively large area is, subtended thereby, whereby the machine is morerigidly supported. A central adjustable supporting member is also included for carrying the weightof the central part of the base and the apparatus associated therewith, whereby the tendency of thebase to warp is eliminated. The base is further so designed that it may be readily and cheaply formed from a single casting.

The invention also consists in certain new and original features of constuction and combinations of parts hereinafter set forth and claimed.

Although the novel features which are be- :lieved 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 manner of its organization may be better understood by referring to the following description taken in connection with the accompanying drawings forming a part thereof, in which Figure l is a plan view of a base for a mo- ;tion picture projecting machine constructed in accordance with the present invention.

Figure 2 is a side elevation thereof, partly in section.

Figure 3 is a rear elevation of the base shown in Figure 1; and

Figure 4 is a detailed sectional view of one of the supporting feet showing the pressure cup in position.

Like reference characters denote like parts ,in the several figures of the drawings.

In the following description and in the claims parts will be identified by specific names for convenience, but they are intended to be as generic in their application to simi- 5 0 iar parts as the art will permit. 1

Referring to the drawings more in detail the invention is shown as comprising a base formed of a body section 10'having' an enlarged circular portion 11 at one end thereof for supporting the pedestal of a motion picture machine and provided with a plurality of outwardly extending legs 12 located adjacent saidenlarged section 11. Theopposite end of. said base is formed with a pair of legs 13 extending outwardly and at right angles therefrom and being provided at their outer portions with a pair of raised flat surfaces'l5 which are adapted to receive and support the rear braces of the machine. Legs.

13 areprovided, intermediate surface 15. and

body portion 10, with a pair of oval openings 16 through which the telescoping brace members are adapted to pass. v

Enlarged section 11 includes a raised fiat ring shaped surface 17 suitably drilled .as at 18 to provide means for securing the pedestal of the mot-ion picture projection machine thereto. Surface 17 corresponds to a cooperating surface on the bottom of the pedestal member.

In the central portion of body member 10 i a raised ring shaped section 19 is provided having a machined surface and suitably" drilled as at 20 to receive and support an operating switch- At the rear of said-ring 19 the base includes a circular conduit opening 21 through which the'electric.conduitfor supplying power to the machine maybe passed. The base is formedwitha circular outline ad acent said condult opening 1n order to increase the total area thereof and form a more rigid assembly.

. The

various legs

12 and 13 are provided at theirextermities with feet members 22 which are suitably drilled and tapped to receive supporting screws 23 Screws 23 areprovided with rounded end sections 24 which are adapted to contact with the. spherical-surfaces 25 in pressure cups 26, said cups being supported fromthe floor of the projection room. An additional foot 27 is-pro-vided at the rear of base 10 and is adapted to receive a supportingscrew 28 The central portion of base 10 is drilled as at 30, intermediate ring 1 9 and enlarged portion lh for receiving supporting screw 31, which is adapted to carry the weight of the central portion of the base and eliminate any bending moment which might otherwise be present, and to prevent vibrations within the base itself.

The base above described is supported from the floor at six different positions, including four outwardly extending legs, rear supporting screw 28 and central screw 31. An extremely accurate adjustment may consequentlybe obtained and the various bending moments be eliminated. In addition, various webs 3:2 are extended across said base in both transverse and longitudinal directions for further strengthening the assembly. WVebs 32 are preferably cast with the base and form an integral part thereof. The particular arrangement of supporting feet is such that a maximum amount of floor area is covered by the base, whereby the center of gravity of the associated machine may be varied within wide limits without impairing the stability of the apparatus.

While 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 base for a motion picture projecting apparatus comprising an elongated body portion having an enlarged circular section for receiving the pedestal of the projection apparatus, a pair of supporting legs extending outwardly from said pedestal supporting section, a second pair of supporting legs located at the rear of said base and means located at an intermediate portion of said base for independently supporting the same.

2. A base for a motion picture projecting apparatus comprising an elongated body portion having an enlarged circular section for receiving the pedestal of the projection apparatus, a pairof supporting legs extending outwardly from said pedestal supporting section, a second pair of supporting legs located at the rear of said base and means located at an intermediate portion of said base for independently supporting the same comprising'a'threaded member carried by said base and adapted to contact with a supporting surface.-

3. A base for a motion picture projecting apparatus comprising an elongated body portion, the forward portion of said base being of enlarged dimensions and adapted to receive the pedestal of the projection machine, supporting legs extending outwardly from saidoenlarged portion, a pair of supporting legs at the rear of said base, each of said last mentioned legs being provided with means tending legs adjacent said pedestal receiving section, a pair of legs extending transversely of said base at a substantial distance from said first mentioned legs, supporting feet associated with each of said legs, and a fifth supporting foot located at the rear of said body section.

' 5. A base for a motion picture projection apparatus comprising an elongated body portion of substantial width having longitudinal and transverse re-enforcing webs formed integrally therewith, a pedestal receiving section, a pair of outwardly and forwardly extending legs adjacent said pedestal receiving section, a pair of legs extending transversely of said base at a substantial distance from said first mentioned legs, supporting feet associated with each of said legs, a fifth supporting foot located at the rear of said body section, and a sixth supporting member located at the center of said body section.

AUGUSTO DINA.