US802817A - Field-glass. - Google Patents

Field-glass. Download PDF

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Publication number
US802817A
US802817A US25274805A US1905252748A US802817A US 802817 A US802817 A US 802817A US 25274805 A US25274805 A US 25274805A US 1905252748 A US1905252748 A US 1905252748A US 802817 A US802817 A US 802817A
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Prior art keywords
eyepieces
parts
glass
field
chain
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Expired - Lifetime
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US25274805A
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Andrew J Lloyd
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Individual
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Priority to US25274805A priority Critical patent/US802817A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/06—Focusing binocular pairs

Definitions

  • My invention relates to the focus adjustment of field or opera glasses; and it consists of va mechanism which will permit of adjusting each eyepiece to the users eye, allowing for the focal characteristics of each eye, and then moving both eyepieces to adapt the combined eyepieces to the distance of the object to be observed.
  • the mechanism for obtaining this result is illustrated in the accompanying drawings, in which- Figure l shows in elevation a field-glass of the Zeiss class.
  • Fig. Q shows an end view of the same.
  • Fig. 3 is asectional view showing the eyepieces and their connected parts.
  • a and B represent the body parts of the instrument, and Gr and Gr the eyepieces, or, rather, the parts that are moved in adjusting the focal lengths to the different eyes and also to the distance of the object to be observed.
  • K and K are sprocketed rings connected to the eyepieces and adapted to engage with the sprocket-chain L, whereby the turning of one of the eyepieces will cause a corresponding rotation of the other.
  • the parts A and B are connected together by pivoted bars O O', and D D'.
  • the spiral grooves H H are madein the movable tubular parts and pins are set in the corresponding iixed tubes and are adapted to engage with the said grooves H and H', so that by turning the external parts of the eyepieces the adjustment for the individual eye is made.
  • the length of the sprocket-chain is adapted to the sprocketrings when the interocular distance is greatest. Vhen the body parts A and B are brought nearer to each other in adjusting them to a shorter interocular distance, the chain L will be slack, but not enough to prevent its working, as the sprocket-teeth are made comparatively long, and although the chain is slack it will still perform its function.
  • the eyepieces are adjusted to the characteristics of the users eyes before the sprocket-chain L is connected to the instrument. Then the chain is placed upon its sprockets and theIield-glass is adjusted to the distance of the objects to be observed. Thus the personal adjustment remains permanent and is not affected by the object-distance adj ustment.
  • I claim- In a binocularinstrumentof this class; eyepieces independently adjustable having' attached sprocketed rings; and a sprocket-chain constructed to engage with said sprocketed rings; substantially as and for the purpose set forth.

Description

No. 802,317. PATBNTED-OGT.. 24, 1905.. A. J. LLOYD.
HELD GLASS.
APPLICATION `ILEI) MAR-29. 1905.
WITNEEEEEI- ANDREW J. LLOYD, OF BOSTON, MASSACHUSETTS.
FlELD-GLASSn Specification of Letters Patent.
Patented Oct. 24, 1905.
Application flied March 29, 1905, Serial No. 252,748.
To all, whom it may concern.-
Be it known that I, ANDREW J. LLOYD, a
citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented anew and useful 'Improvcment in Field-Glasses, of which the following', taken in connection with the accompanying drawings, is a specification.
My invention relates to the focus adjustment of field or opera glasses; and it consists of va mechanism which will permit of adjusting each eyepiece to the users eye, allowing for the focal characteristics of each eye, and then moving both eyepieces to adapt the combined eyepieces to the distance of the object to be observed. The mechanism for obtaining this result is illustrated in the accompanying drawings, in which- Figure l shows in elevation a field-glass of the Zeiss class. Fig. Q shows an end view of the same. Fig. 3 is asectional view showing the eyepieces and their connected parts.
In the drawings, A and B represent the body parts of the instrument, and Gr and Gr the eyepieces, or, rather, the parts that are moved in adjusting the focal lengths to the different eyes and also to the distance of the object to be observed.
K and K are sprocketed rings connected to the eyepieces and adapted to engage with the sprocket-chain L, whereby the turning of one of the eyepieces will cause a corresponding rotation of the other.
To adapt the instrument to the interocular distance, the parts A and B are connected together by pivoted bars O O', and D D'. The parts C and O and D and D overlap each other, as shown in Figs. 1 and 3, and are clamped together by means of the central tube E and a screw-rod E. rThe loosening of the screw-rod E will free the parts C and O' and also the parts D and Dl and admit of adjusting the distance between the body parts A B- that is, theinteroculardistance-and by tighteningl the screw-rod E' the parts may be firmly held in the desired positions.
To adjust the separate eyepieces to the eyes, the spiral grooves H H are madein the movable tubular parts and pins are set in the corresponding iixed tubes and are adapted to engage with the said grooves H and H', so that by turning the external parts of the eyepieces the adjustment for the individual eye is made.
The length of the sprocket-chain is adapted to the sprocketrings when the interocular distance is greatest. Vhen the body parts A and B are brought nearer to each other in adjusting them to a shorter interocular distance, the chain L will be slack, but not enough to prevent its working, as the sprocket-teeth are made comparatively long, and although the chain is slack it will still perform its function.
In practice the eyepieces are adjusted to the characteristics of the users eyes before the sprocket-chain L is connected to the instrument. Then the chain is placed upon its sprockets and theIield-glass is adjusted to the distance of the objects to be observed. Thus the personal adjustment remains permanent and is not affected by the object-distance adj ustment.
I claim- In a binocularinstrumentof this class; eyepieces independently adjustable having' attached sprocketed rings; and a sprocket-chain constructed to engage with said sprocketed rings; substantially as and for the purpose set forth.
In testimony whereof I have signed my name to this specilication, in the presence of two subscribing witnesses, on this th day of March,
ANDREW J. LLOYD. Witnesses:
FRANK G. PARKER, JOHN BUCKLER.
US25274805A 1905-03-29 1905-03-29 Field-glass. Expired - Lifetime US802817A (en)

Priority Applications (1)

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US25274805A US802817A (en) 1905-03-29 1905-03-29 Field-glass.

Applications Claiming Priority (1)

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US25274805A US802817A (en) 1905-03-29 1905-03-29 Field-glass.

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540792A (en) * 1968-01-02 1970-11-17 Alfred A Akin Jr Rapid-focus binocular
US4126374A (en) * 1976-11-29 1978-11-21 Maguire Paul R Binocular assembly with improved focusing mechanism
US4955702A (en) * 1988-12-19 1990-09-11 Masakazu Nakamura Fixed focus binocular with visual acuity compensating mechanism
US4989963A (en) * 1988-09-09 1991-02-05 Leica Gmbh Binocular telescope with coupled joint focusing and uncoupled separate focusing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540792A (en) * 1968-01-02 1970-11-17 Alfred A Akin Jr Rapid-focus binocular
US4126374A (en) * 1976-11-29 1978-11-21 Maguire Paul R Binocular assembly with improved focusing mechanism
US4989963A (en) * 1988-09-09 1991-02-05 Leica Gmbh Binocular telescope with coupled joint focusing and uncoupled separate focusing
US4955702A (en) * 1988-12-19 1990-09-11 Masakazu Nakamura Fixed focus binocular with visual acuity compensating mechanism

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