US1764939A

US1764939A - Pad roller arm

Info

Publication number: US1764939A
Application number: US271091A
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: 1930-06-17
Anticipated expiration: 1947-06-17

Description

June 17, 1930. A} DINA PAD ROLLER ARM Filed April 18,1928

IN V EN TOR.

BY i 5 5 I} ATTORNEY Patented June 17, ,1930

UNITED STATES PATENTE OFFICE I AUGUSTO DINA, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO INTERNATIONAL PRO- J'EGTOR CORPORATION, OF NEW YORK,

N. Y., A CORPORATION OF DELAWARE ran some]; ARM

Application filed April- 18, 1928. Serial 110. 271,091.

This invention relates to a projection head, and more particularly to a padroller arm forming a part of the projection head and adapted to bear against the film sprocket for holding the film in engagement therewith.

is contained wlthin the arm itself and is so designed that the arm may be readily moved from one position to the other by applying a suitable force thereto, but will be securely held in either position when the force is withis drawn.

The arm constructed in accordance with this invention employs the stop member orstud having a dual function, namely, to limit the movement of the arm and to contact with a friction pin for holding the same in its extreme positions. The invention, therefore,

- eliminates external holding means and leaves a a free space for the insertion and operation of the film. -.The invention also consists in certain new and original features of construction and combinations of and claimed.

Although the novel features which are be:

parts hereinafter set forth 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 itsorganization may be better understood by referring to the following description taken in connection with the accompanying drawings forming a partthereof, in which Fig. 1 is an elevation of a projection head showing the location of the pad roller arm as applied thereto;

' Fig. 2 is a plan view ofthepad and supporting means; I

, Fig. 3 is a side elevation thereof showing the arm in film engaging position;

Fig. 4 is an end elevation of the arm and associated mechanism; and

Fig. 5 is a side elevation showing the arm in film releasing position.

roller arm.

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 similar parts as the art will permit.

Referring to the drawings more in detail, Fig. 1 shows diagrammatically the upper film magazine 10 and lower film magazine 11 with the projection head 12, of an -well known form, associated therewith. he particular formation of film magazines and projection head form no part of the present invention except in so far as the pad roller arm is associated therewith.

Considering so much of the mechanism of the projection head as is necessary to an understanding of the present invention, an upper continuous film sprocket 13 is provided for withdrawing film 14 from upper film magazine 10. The film is then passed over intermittent sprocket 16 and then passes to lower film magazine 11 over continuous sprocket 17 The pad roller arm about to be.

described has been shown as associated with upper continuous sprocket 13, although it is obvious that it may be employed with any of the film sprockets if desired.

Referring to Figs. 2 and 5, the pad roller arm 18 is formed substantially L-shaped having a roller supporting section 20 and a bifurcated section 21 with a pivotal bearing member 22 located therebetween. Bearing member 22 is adapted to be journalled on supporting stud 24, resting against stationary collar 25, supported thereby. Stud 24 may be secured in a vertical plate 26 forming a part of the projection head in any desired manner.

Arm 20 extending from hearing 22 is provided at its end with a tubular section 27 into which roller supporting 'rod 28 is inserted and secured by means of set screw 29; Rod 28 is formed with a reduced section 30 providing a bearing for roller 31" and with an outwardly extending enlarged section 32 which forms a handle for moving the arm from one operative sition to the other as will be hereafter set orth. Roller 31 is suitabl shaped to contact with film sprocket 13 an is free to be rotated thereby or by the film passing. thereover.

Section 21 of roller arm 18 is bifurcated to form a pair of

members

35 and 36 which are positioned on opposite sides of stop member or stud 37. Stud 37 is secured to vertical plate 26 of the projection head in any desired manner. Member 36- is adapted to bear against stop member 37 for limiting the movement of the arm in one direction and adjustable set screw 38 is threaded in member 35 and serves to limit the movement of the arm in the other direction. Lock nut 39 may be associated with set screw 38 for securing the same in any desiredposition.

Friction pin 40 having a rounded end 41 is inserted in a tubular bore in arm 21 and pressed outwardl by means of spring 42 which is inserted in the lower portion of said bore. Pin 40 is provided with a slot 43 extendin over a portion of the length thereof which is adapted to engagescrew 44 for preventing withdrawal of said pin. Screw 44 u may be threaded into the face of arm 21 after pin 40 has been inserted, and will thereafter prevent accidental removal of said pin.

Pin 40 is so positioned with respect to stop member 37 that when the arm is in film engaging position as shown in Fig. 3, said pin will contact with the side of said stop member and by the frictionthereof will serve to hold the arm in the selected position. When in film releasing position as shown in Fig. 5, pin 40 contacts with the opposite face of stop member 37 for holding the arm in that osition. Furthermore, the arrangement the 'parts is such that the force of spring 42 is utilized for urging arm toward either of its extreme posltions.

In using the above described mechanism,

. in order to insert a film in the projection head,

pad roller arm 18 is moved downwardly by pressin handle 32 into disengaging position. e film is then passed over film sprocket 13 and the roller arm again raised by means of handle 32. It is then pressed against the face of the film sprocket and prevents the film from becoming disengaged therefrom. Set screw 38 is preferably so adjusted that roller 31 is prevented from exerting a force on sprocket 13 in excess of that required for holding the film in position.

The various adjusting locln'ng means of the pad roller arm are formed in a self contained unit whereby free space is left for the insertion of the film. Pin is secured interiorly of bifurcated section 21 on therolIer arm, and by reason of locking screw 44 permits the arm to be removed as a unit for purposes of replacement or adjustment. A single stop member is employed on the projection head for limiting the movement of arm 18 and also for cooperating with pin 40 for securing the arm in its extreme positions.

Although the above described pad roller arm has been shown as applied to the upper continuous film sprocket, it is obvious that it may be used in other locations where a roller arm is required without departing from the scope of the present invention.

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 1s claimed is:

1. A pad roller arm comprising an L- shaped member, one end of said member being bifurcated to provide stop members and the other end thereof being drilled to receive a roller supporting arm, and means associated with said bifurcated end for securing said arm in either extreme sition.

2. In combination with a projection head having a film sprocket, a pad roller, means for supporting said roller in variable relation with respect to said sprocket comprising a pivoted arm, a roller support secured to one end of said arm, stop members associated with the other end of said arm, a spring pressed friction pin carried by said arm between said stop members and a stud secured to said projection head and contactingv with said stop members and said pin whereby the movement of said arm is limited and said arm is frictionally secured in its extreme position.

3. In combination with a projection head having a film sprocket, a pad roller, means for supporting said roller in variable relation with respect to said sprocket comprising a pivoted arm, a roller support secured to one end of said arm, stop members associated with the other end of said arm, resilient holdingmeans carried by said armbetween said stop members. and a stud secured to said projection head and contacting with said stop members and said holding means whereby the movement of said arm is limited and said arm is frictionally secured in its extreme positions.

4. In combination with a projection head having a film sprocket, a pad roller, means for supporting said roller in variable relation with respect to said sprocket comprising a pivoted arm, a roller support secured to one end of said arm, stop members associated with the other end of said arm, and resilient holding means carried by said arm and a stud secured to said projection head and contacting with said stop members and said holding means whereby the movement of said arm is limited and said arm is frictionally-secured in its extreme positions.

5. In combination with a pad roller, means for supporting said roller comprising a pivoted arm, a roller support secured to said arm, stop members associated with said arm, holding means carried by said arm adjacent said stop members and a stud secured to said projection head and contacting with said s top members and said holding means for limiting the movement of said arm and hold 7. A pad roller arm having means for sup-v porting a pad roller, and means for limiting the movement of said arm, comprising spaced stop members and an adjustable set screw secured in one of said members and adapted to engage a stationary stop to limit the movement of said arm in one direction.

8. A pad roller arm having means at one end thereof for supporting a pad roller, and means at the other end thereof for limiting the movement of said arm, comprising bifurcations and an adjustable set screw secured in one of said bifurcations and adapted to engage a stop to limit the movement of said arm in one direction, the other of said bifurcations being adapted to engage said stop to limit the movement of said arm in the opposite direction, a circular bore in said arm between said bifurcations, a pin having a rounded surface secured therein, and a spring in said bore for urging said pin outwardly toward said stop.

9. A pad roller arm having means at one end thereof for supporting a pad roller, and means at the other end thereof for limiting the movement of said arm, comprising bifurcations and an adjustable set screw secured in one of said bifurcations and adapted to engage a stop to limit the movement of said arm in one direction, the other of said bifurcations being adapted to engage said stop to limit the movement of said arm in the opposite direction, a circular bore in said arm between said bifurcations, a pin having a rounded surface secured therein, a spring in said bore for urging said pin outwardly toward said stop, said in having a slot and a screw carried by said arm and cooperating with said slot to prevent removal of said pin,

cooperating with said slot to prevent removal of said pin.

11. A pad roller arm having means at one end thereof for supporting a pad roller, and means at the other end thereof to engage a stationary stop for limiting the movement of said arm, comprising spaced stop members, a circular bore in said arm between said stop members, a friction pin secured therein and means for urging said pin outwardly toward said stationary stop for locking said arm in its extremepositions.

In testimony whereof I have hereunto set m hand.

y AUGUSTO DINA.

10. A pad roller arm having means at one end thereof for supporting a pad roller, and

.means at the other end thereof to engage a stop for limiting the movement of said arm, comprising spaced stop members, a circular bore in said arm between said stop members, a pin resiliently secured therein, said pin ham ing a slot and a screw carried by said am