US2302134A - Adjustable mechanism - Google Patents

Adjustable mechanism Download PDF

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Publication number
US2302134A
US2302134A US355109A US35510940A US2302134A US 2302134 A US2302134 A US 2302134A US 355109 A US355109 A US 355109A US 35510940 A US35510940 A US 35510940A US 2302134 A US2302134 A US 2302134A
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United States
Prior art keywords
opening
frame structure
shaft
axial movement
legs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US355109A
Inventor
Louis A Mcnabb
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bell and Howell Co
Original Assignee
Bell and Howell Co
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Publication date
Application filed by Bell and Howell Co filed Critical Bell and Howell Co
Priority to US355109A priority Critical patent/US2302134A/en
Application granted granted Critical
Publication of US2302134A publication Critical patent/US2302134A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F16M11/10—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00—Details of stands or supports
    • F16M2200/02—Locking means
    • F16M2200/021—Locking means for rotational movement
    • F16M2200/024—Locking means for rotational movement by positive interaction, e.g. male-female connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/1967—Rack and pinion

Definitions

  • My invention relates particularly to adjustable support mechanism which is adapted for use as a tilt support for picture projectors.
  • the general object of the invention resides in the provision of a novel, effective and convenient adjustable mechanism, particularly adjustable support mechanism, which is well adapted for use as a tilt support for picture projectors, and which is susceptible of unobtrusiveness Without sacrificing convenience in manipulation, the invention contemplating a picture projector for home use on which unobtrusive mechanical devices are desirable.
  • FIG. 1 is a partial front elevation of a picture projector embodying my invention, with parts broken away and shown in section;
  • Figure 2 is a partial sectional View substantially on the line 22 of Figure 1;
  • Figures 3 and 4 are partial sectional views substantially on the line 3-3 of Figure 1 and showing parts in different positions.
  • a frame structure is provided by an enclosing casing or cabinet I within which a mechanism frame 2 is secured.
  • Parallel vertically disposed supporting legs 3 are spaced transversely of the casing and are slidably mounted in vertical bearings 4 of the frame 2 and within the frame structure, and extend downwardly through openings 5 through the bottom of the casing to variably extend downwardly from the frame structure.
  • the lower ends of the legs are provided with enlarged feet 6 engageable upwardly against washers 1 on the bottom of the casing to limit upward or retracting movement of the legs. See particularly Figures 1 and 2.
  • a shaft 8 is rotatably mounted on the frame 2 and within the frame structure, and is disposed on a horizontal axis extending transversely of the legs 3.
  • the legs 3 are provided with longitudinally extending gear racks 9, and gear pinions II on the ends of the shaft 8 mesh with these racks for effecting simultaneous longitudinal movement of the legs with rotation of the shaft.
  • a vertical wall of the casing l extending correspondingly with and adjacent the shaft 8 is provided with a circular opening I2 thereinto, the shaft thus extending transversely of this opening.
  • a second shaft 13 is mounted for rotation and axial movement in a bore M of the frame 2 and within the frame structure on an axis extending centrally through the opening [2 and transversely of the shaft 8.
  • a radially extending circular manipulating knob I5 is secured on the outer end of the shaft l3, and is positionable with axial movement of this shaft in or exterior of the opening [2, as shown respectively in Figures 3 and 4.
  • the knob l5 limits inward movement of the shaft 13, and a thrust collar l6, secured on the inner end of this shaft, is engageable with the frame 2 to limit outward movement of this shaft.
  • the shaft [3 is provided with a helical selflocking gear worm i! which meshes with a helical worm gear I8 on the shaft 8 for rotation of this shaft and actuation of the legs 3 with rotationof the shaft [3.
  • the legs 3 are yieldably urged upwardly with respect to the frame structure by the weight of the frame structure, and the helical gears I! and 18 are arranged so that the leg members, as so yieldably urged, thrust the shaft [3 and with it the manipulating knob I5 outwardly, as shown in Figure 4, until the thrust collar 16 engages against the frame 2, thus positioning the knob 15 outwardly of the opening 12 for convenient manipulation thereof, the self-locking worm gear l1 maintaining the legs in outwardly extending adjusted position.
  • the knob 15 is provided with a manipulating formation inwardly of the exterior axial face thereof for conveniently rotating it and the shaft I3 to position the knob exterior of the opening I2, which manipulating portion consists of a di ametrical rib I9 formed by diametrically opposite recesses 2
  • an adjustable supporting mechanism the combination with an enclosing frame structure provided with an opening thereinto, of a member mounted within said frame structure for rotation and axial movement on an axis extending through said opening and provided with a manipulating portion positionable with axial movement thereof in or exterior of said opening, a supporting leg member movably mounted within said frame structure to variably extend therefrom, and cooperating elements respectively connected with said rotatable and leg members and operative to actuate said leg member with rotation of said rotatable member and to permit axial movement of said rotatable member.
  • an adjustable supporting mechanism the combination with an enclosing frame structure provided with an opening thereinto, of a member mounted within said frame structure for rotation and axial movement on an axis extending through said opening and provided with an outer manipulating portion positionable with axial movement thereof in or exterior of said opening, a supporting leg member movably mounted within said frame structure to variably extend downwardly therefrom, meshed helical-gears respectively connected with said rotatable and leg members and including a self-locking worm angularly and axially fixed with said rotatable member, said gears being arranged to thrust said rotatable member in the direction outwardly of said opening with pressure applied upwardly on said leg member, and means limiting axial movement of said rotatable member.
  • an adjustable supporting mechanism the combination with an enclosing frame structure provided with a side opening thereinto, of a pair of vertically disposed supporting legs spaced transversely of said opening and movably mounted within said frame structure to variably extend downwardly therefrom and provided with longitudinally extending gear racks, a shaft rotatably mounted within said frame structure and extending transversely of said legs and said opening and provided with gear pinions meshing with said racks, a manipulating member mounted within said frame structure for rotation and axial movement on an axis extending through said opening and transversely of said shaft and provided with an outer manipulating portion positionable with axial movement thereof in or, exterior of said opening, meshed helical gears respectively fixed with said shaft and manipulating member including a self-locking worm angularly and axially fixed with said manipulating member, said helical gears being arranged to thrust in the direction outwardly of said opening with pressure applied upwardly on said leg members, and means limiting axial movement of said manipulating member.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hinges (AREA)

Description

Nov. 17, 1942. L A MCNAB 2,302,134
ADJUSTABLE MECHANISM Filed Sept. 3, 1940 7 I I 6 Y 6 IN ENTER LULIIE A. PYENABE Patented Nov. 17, 1942 ADJUSTABLE MECHANISM Louis A. McNabb, Evanston, Ill., assignor to The Bell & Howell Company, Chicago, 111., a. corporation of Illinois Application September 3, 1940, Serial No. 355,109
Claims.
My invention relates particularly to adjustable support mechanism which is adapted for use as a tilt support for picture projectors.
The general object of the invention resides in the provision of a novel, effective and convenient adjustable mechanism, particularly adjustable support mechanism, which is well adapted for use as a tilt support for picture projectors, and which is susceptible of unobtrusiveness Without sacrificing convenience in manipulation, the invention contemplating a picture projector for home use on which unobtrusive mechanical devices are desirable.
With this object in View, my invention consists in certain features of novelty in the construction, combination and arrangement of parts by which the said object and certain other objects, hereinafter appearing, are effected, all as fully described with reference to the accompanying drawing and more particularly pointed out in the appended claims.
In the said drawing- Figure 1 is a partial front elevation of a picture projector embodying my invention, with parts broken away and shown in section;
Figure 2 is a partial sectional View substantially on the line 22 of Figure 1; and
Figures 3 and 4 are partial sectional views substantially on the line 3-3 of Figure 1 and showing parts in different positions.
Referring to the drawing, a frame structure is provided by an enclosing casing or cabinet I within which a mechanism frame 2 is secured. Parallel vertically disposed supporting legs 3 are spaced transversely of the casing and are slidably mounted in vertical bearings 4 of the frame 2 and within the frame structure, and extend downwardly through openings 5 through the bottom of the casing to variably extend downwardly from the frame structure. The lower ends of the legs are provided with enlarged feet 6 engageable upwardly against washers 1 on the bottom of the casing to limit upward or retracting movement of the legs. See particularly Figures 1 and 2.
A shaft 8 is rotatably mounted on the frame 2 and within the frame structure, and is disposed on a horizontal axis extending transversely of the legs 3. The legs 3 are provided with longitudinally extending gear racks 9, and gear pinions II on the ends of the shaft 8 mesh with these racks for effecting simultaneous longitudinal movement of the legs with rotation of the shaft.
A vertical wall of the casing l extending correspondingly with and adjacent the shaft 8 is provided with a circular opening I2 thereinto, the shaft thus extending transversely of this opening. A second shaft 13 is mounted for rotation and axial movement in a bore M of the frame 2 and within the frame structure on an axis extending centrally through the opening [2 and transversely of the shaft 8. A radially extending circular manipulating knob I5 is secured on the outer end of the shaft l3, and is positionable with axial movement of this shaft in or exterior of the opening [2, as shown respectively in Figures 3 and 4. The knob l5 limits inward movement of the shaft 13, and a thrust collar l6, secured on the inner end of this shaft, is engageable with the frame 2 to limit outward movement of this shaft.
The shaft [3 is provided with a helical selflocking gear worm i! which meshes with a helical worm gear I8 on the shaft 8 for rotation of this shaft and actuation of the legs 3 with rotationof the shaft [3.
The feet 6 of the legs 3, being engaged downwardly on a supporting surface, such as a table top, to support the frame structure, the legs 3 are yieldably urged upwardly with respect to the frame structure by the weight of the frame structure, and the helical gears I! and 18 are arranged so that the leg members, as so yieldably urged, thrust the shaft [3 and with it the manipulating knob I5 outwardly, as shown in Figure 4, until the thrust collar 16 engages against the frame 2, thus positioning the knob 15 outwardly of the opening 12 for convenient manipulation thereof, the self-locking worm gear l1 maintaining the legs in outwardly extending adjusted position. However, engagement of the feet 6 of the legs 3 upwardly against the washers l of the casing l at the retracted position of the legs 3, terminates the aforesaid yielding urge of the legs 3, in which case the shaft 13 may be rotated in the direction to position it inwardly and to position the knob l5 in the opening 12, as shown in Figure 3, where it is unobtrusive and is not likely to be damaged.
The knob 15 is provided with a manipulating formation inwardly of the exterior axial face thereof for conveniently rotating it and the shaft I3 to position the knob exterior of the opening I2, which manipulating portion consists of a di ametrical rib I9 formed by diametrically opposite recesses 2| in the exterior axial face of the knob.
While I have thus described my invention, I do not wish to be limited to the precise details described, as changes may be readily made without departing from the spirit of my invention, but having thus described my invention, I claim as new and desire to secure by Letters Patent the following:
1. In a mechanism of the character described, the combination with a frame structure provided with an opening thereinto, of a member mounted on said frame structure for rotation and axial movement on an axis extending through said opening and provided with a manipulating portion positionable with axial movement thereof in or exterior of said opening, an additional member movably mounted on said frame structure and yieldably urged in one direction, meshed helical gears respectively connected with said movable members and including a self-locking worm angularly and axially fixed with said first mentioned movable member, said gears being arranged to thrust said first mentioned movable member in the direction outwardly of said opening under yieldable urge of said second movable member, shoulder means limiting movement of said second movable member in its yieldably 'urged direction, and a second shoulder means limiting axial movement of said first mentioned movable member.
2. In a mechanism of the character described, the combination with a frame structure provided with a circular opening thereinto, of a member mounted on said frame structure for rotation and axial movement on an axis extending centrally through said opening and provided with a radially extending circular manipulating portion positiontable with axial movement thereof in or exterior of said opening, said manipulating portion being provided with a manipulating forma tion inwardly of the exterior axial face thereof, an additional member rotatably mounted on said frame structure on an axis transverse to the axis of said first mentioned rotatable member and yieldably urged in one direction, meshed helical gears respectively fixed with said rotatable members including a self-locking worm angularly and axially fixed with said first mentioned rotatable member, said gears being arranged to thrust said first mentioned rotatable member in the direction outwardly of said opening under yieldable urge of said second rotatable member,
shoulder means limiting rotation of said second rotatable member in its yieldably urged direction, and a second shoulder means limiting axial movement of said first mentioned rotatable member.
3. In an adjustable supporting mechanism, the combination with an enclosing frame structure provided with an opening thereinto, of a member mounted within said frame structure for rotation and axial movement on an axis extending through said opening and provided with a manipulating portion positionable with axial movement thereof in or exterior of said opening, a supporting leg member movably mounted within said frame structure to variably extend therefrom, and cooperating elements respectively connected with said rotatable and leg members and operative to actuate said leg member with rotation of said rotatable member and to permit axial movement of said rotatable member.
4. In an adjustable supporting mechanism, the combination with an enclosing frame structure provided with an opening thereinto, of a member mounted within said frame structure for rotation and axial movement on an axis extending through said opening and provided with an outer manipulating portion positionable with axial movement thereof in or exterior of said opening, a supporting leg member movably mounted within said frame structure to variably extend downwardly therefrom, meshed helical-gears respectively connected with said rotatable and leg members and including a self-locking worm angularly and axially fixed with said rotatable member, said gears being arranged to thrust said rotatable member in the direction outwardly of said opening with pressure applied upwardly on said leg member, and means limiting axial movement of said rotatable member.
5. In an adjustable supporting mechanism, the combination with an enclosing frame structure provided with a side opening thereinto, of a pair of vertically disposed supporting legs spaced transversely of said opening and movably mounted within said frame structure to variably extend downwardly therefrom and provided with longitudinally extending gear racks, a shaft rotatably mounted within said frame structure and extending transversely of said legs and said opening and provided with gear pinions meshing with said racks, a manipulating member mounted within said frame structure for rotation and axial movement on an axis extending through said opening and transversely of said shaft and provided with an outer manipulating portion positionable with axial movement thereof in or, exterior of said opening, meshed helical gears respectively fixed with said shaft and manipulating member including a self-locking worm angularly and axially fixed with said manipulating member, said helical gears being arranged to thrust in the direction outwardly of said opening with pressure applied upwardly on said leg members, and means limiting axial movement of said manipulating member.
LOUIS A. McNABB.
US355109A 1940-09-03 1940-09-03 Adjustable mechanism Expired - Lifetime US2302134A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540750A (en) * 1947-11-08 1951-02-06 Nineteen Hundred Corp Self-adjusting leg
US2655334A (en) * 1950-04-11 1953-10-13 Debrie Andre Victor Le Clement Vertically adjustable supporting device
US2944776A (en) * 1956-03-22 1960-07-12 Sylvania Electric Prod Projector tilt adjustment
US4721275A (en) * 1986-12-19 1988-01-26 Benton David B Steady levelors
US5762303A (en) * 1994-10-31 1998-06-09 Daewoo Electronics Co., Ltd. Tilting angle adjusting device for use in a projector
US20030106972A1 (en) * 2001-12-12 2003-06-12 Shin-Lung Hsu Adjusting device
US20110279792A1 (en) * 2010-05-13 2011-11-17 Sanyo Electric Co., Ltd. Projection display device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540750A (en) * 1947-11-08 1951-02-06 Nineteen Hundred Corp Self-adjusting leg
US2655334A (en) * 1950-04-11 1953-10-13 Debrie Andre Victor Le Clement Vertically adjustable supporting device
US2944776A (en) * 1956-03-22 1960-07-12 Sylvania Electric Prod Projector tilt adjustment
US4721275A (en) * 1986-12-19 1988-01-26 Benton David B Steady levelors
US5762303A (en) * 1994-10-31 1998-06-09 Daewoo Electronics Co., Ltd. Tilting angle adjusting device for use in a projector
US20030106972A1 (en) * 2001-12-12 2003-06-12 Shin-Lung Hsu Adjusting device
US6796538B2 (en) * 2001-12-12 2004-09-28 Benq Corporation Adjusting device
US20110279792A1 (en) * 2010-05-13 2011-11-17 Sanyo Electric Co., Ltd. Projection display device

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