US170749A - Improvement in stereoscopes - Google Patents
Improvement in stereoscopes Download PDFInfo
- Publication number
- US170749A US170749A US170749DA US170749A US 170749 A US170749 A US 170749A US 170749D A US170749D A US 170749DA US 170749 A US170749 A US 170749A
- Authority
- US
- United States
- Prior art keywords
- picture
- holder
- stereoscopes
- bar
- spring
- 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
Links
- 239000002184 metal Substances 0.000 description 6
- 238000000525 cavity enhanced absorption spectroscopy Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
- G02B30/37—Collapsible stereoscopes
Definitions
- Stereoscopes have been made with a pictureholder sliding longitudinally of the bar forming the base of the stereoscope, and said holder has been provided with a metal spring below the base, that has furnished the means for retaining the picture-holding slide at any position to which it may be moved, the friction of such spring accomplishing this object, but the holder is liable to assume a diagonal position to the bar or base.
- My present invention is for the purpose of guiding the picture-holder, so that it will move freely, and always be held at right angles to the bar.
- the metal spring is made with four arms, two of which are connected with the picture-holder, and the other two run at their ends in or upon the rib or groove at the under side ofthe bar.
- Figure 1 is an inverted plan
- Fig. 2 is a view endwise, of the bar.
- the stereoscope-instrnment is of the ordinary character, so far as the glasses a, hood b, division c, and picture-holder d; and the baror base c is of usual construction, except that a groove, c', is made longitudinally thereof in the said bar, or a rib placed thereon, and the spring h is made of four metal arms, 2 2 and 3 3, the former being united to the pictureholder, and the latter having rounded projections running in the groove c', or bent up to grasp the rib, so that the picture-holder is held firmly by the spring at the bearing-points that produce the friction.
- Springs have been employed in many ways for producing a yielding frictional resistance, and springs have been placed within grooves.
- the guide and frictional detainer for the picture-slide of a stercoscope-instrument composed ot' the spring It, that is attached to said slide, and bears at its ends in a groove, or upon a rib at the under side of the bar e, to form a guide, as set forth.
Description
W. E. LEWIS.
sTEnEoscoPE. N'o.17,0,749. Patented nec. 7, 1875.
, /l ,d wif? 75@ 51 UNITED STATES PATENT OFFICE.
WILLIAM H. LEWIS, OF NEW YORK, N. Y., ASSIGNOR TO' E. AND H. T. ANTHONY 85 CO., OF SAME PLACE.
IMPROVEMENT IN STEREOSCOPES.
Specification forming part of Letters Patent No. 170,749,
dated December 7, 1875; application iled October 20, 1874.
To all 'whom it may concern Be it known that I, WILLIAM H. LEWIS, of the city and State of New York, have invented an Improvement in Stereoscopes, ot' which the following is a specification:
Stereoscopes have been made with a pictureholder sliding longitudinally of the bar forming the base of the stereoscope, and said holder has been provided with a metal spring below the base, that has furnished the means for retaining the picture-holding slide at any position to which it may be moved, the friction of such spring accomplishing this object, but the holder is liable to assume a diagonal position to the bar or base.
My present invention is for the purpose of guiding the picture-holder, so that it will move freely, and always be held at right angles to the bar.
I make use of a groove or rib at the under side of the bar, and the metal spring is made with four arms, two of which are connected with the picture-holder, and the other two run at their ends in or upon the rib or groove at the under side ofthe bar. Thereby the sliding picture-holder is kept in position, but is free to be moved in bringing the picture to focus.
In the drawing, Figure 1 is an inverted plan, and Fig. 2 is a view endwise, of the bar.
The stereoscope-instrnment is of the ordinary character, so far as the glasses a, hood b, division c, and picture-holder d; and the baror base c is of usual construction, except that a groove, c', is made longitudinally thereof in the said bar, or a rib placed thereon, and the spring h is made of four metal arms, 2 2 and 3 3, the former being united to the pictureholder, and the latter having rounded projections running in the groove c', or bent up to grasp the rib, so that the picture-holder is held firmly by the spring at the bearing-points that produce the friction.
Springs have been employed in many ways for producing a yielding frictional resistance, and springs have been placed within grooves.
In my improved stereoscope the ends of the spring become guides for the picture-holder in addition to furnishing the frictional resistance, in consequence ofsuch spring ends resting in a groove or upon a rib, and sliding as the holder is moved.
I claim as my invention- The guide and frictional detainer for the picture-slide of a stercoscope-instrument composed ot' the spring It, that is attached to said slide, and bears at its ends in a groove, or upon a rib at the under side of the bar e, to form a guide, as set forth.
Signed by me this 16th day W. H. LEWIS.
of October,
Witnesses:
GEO. T. PINcKNEY, CEAS. H. SMITH.
Publications (1)
Publication Number | Publication Date |
---|---|
US170749A true US170749A (en) | 1875-12-07 |
Family
ID=2240156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US170749D Expired - Lifetime US170749A (en) | Improvement in stereoscopes |
Country Status (1)
Country | Link |
---|---|
US (1) | US170749A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2758331A (en) * | 1951-09-06 | 1956-08-14 | Hoover Co | Suction cleaning tool with adjustable brush |
-
0
- US US170749D patent/US170749A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2758331A (en) * | 1951-09-06 | 1956-08-14 | Hoover Co | Suction cleaning tool with adjustable brush |
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