JP2847735B2 - Clock with navigation calculator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pilot timepiece, and more particularly, to a timepiece with a navigation calculation device capable of performing simple navigation calculations.

[Conventional technology]

Conventionally, several types of clocks with a slide rule using a circular slide rule device have been put into practical use, but simple multiplication, division speed calculation, and fuel consumption calculation were possible on a general logarithmic scale, but were complicated. It was not possible to perform accurate conversions and correct calculations for true speed and true altitude.

[Problems to be solved by the invention]

The present invention improves the conventional slide rule device that can only perform simple calculations, enables general multiplication and division to full-scale conversion, true speed, correction calculation of true altitude, and navigation calculation required for pilots An object is to realize a device which can be easily performed.

[Means for solving the problem]

The timepiece with a navigation calculation device of the present invention comprises a scale display unit having a logarithmic scale on the upper surface, a fixed scale ring having a rising portion having a return surface on the inside, and a mutually projecting portion on the inner wall step of the trunk. A plastic ring with a cover glass made of inorganic glass placed between itself and the body is pressed in the radial direction by placing it in the rotational direction by engaging some non-circular parts, such as the rubbing part, and pressing it in the radial direction. The rotating display ring fixed to the upper part of the rotating bezel main body which is detachably and rotatable via an elastic member on the outer periphery of the body while being fixed in a watertight manner so that the inner diameter thereof overlaps the plastic ring in a plane. The rotary display ring is provided with a logarithmic scale, a distance scale, a weight scale or a fuel scale, and a 360 ° division scale.

In addition, a fixed scale ring constituting a scale display unit having a logarithmic scale on the upper surface is positioned and placed on the step of the inner wall of the body, and a cover glass made of inorganic glass is fixed to the body in a watertight manner on the upper part thereof. An arcuate groove-shaped opening is provided in a part of a rotary display ring fixed to an upper portion of a rotating bezel body which is configured to be detachable and rotatable via an elastic member on an outer peripheral portion of the trunk, and the opening is provided in the opening. Constitutes a correction scale for correction calculation of true speed, true altitude, etc., and a conversion scale display such as a conversion scale of Celsius and Fahrenheit other than the opening, a conversion scale of a distance system, a conversion scale of a weight system, and a logarithmic scale. An auxiliary graduation plate provided with an auxiliary graduation is fixed to the upper surface of the body located below the opening.

〔Example〕

The apparatus of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a fixed scale ring, which is formed by injection molding of plastic and engages with a positioning plate 5a formed on the inner diameter of the barrel 5. A protrusion 1c is formed inside, a logarithmic scale 1d is formed outside the upper surface 1a, and a time conversion scale 1e is formed inside by printing. A cover glass 7 made of inorganic glass is fixed to the upper part of the fixed scale ring 1 in a water-tight manner by pressing a plastic ring 6 provided between itself and the body 5 in a radial direction. Torso 5
A rotatable bezel 2 to which a rotatable display ring 3 is fixed by caulking or the like is detachably and rotatably mounted on the outer peripheral biting portion 5b, and a logarithmic scale 3a is provided on the upper surface of the display ring 3 inside. A 360 ° division compass scale 3b is provided outside, and NAUT, STAT,
Distance conversion scales such as KM and 1000FT, LITERS, USGAL, IM
Fuel system conversion scales such as P.GAL and KG, LBS, FUEL LBS, OI
L Scale scale 3c composed of a weight scale such as LBS is configured. An anodized display plate or a stainless plate etched and filled with paint is used for the rotating display ring. The rotating bezel 2 is made of a highly corrosion-resistant metal or alloy such as stainless steel or titanium, and a packing 4 made of a synthetic rubber is provided between the body 5 and the packing 5 so as to give an appropriate rotational torque by giving a radial interference. I have. Packing 4 is a leaf spring,
Other elastic members such as wave springs may be used.

In the other embodiment of FIGS. 3 and 4, reference numeral 11 denotes a fixed scale ring, which is formed by injection molding of plastic as in FIG. The projection 11c is formed inside, and the upper surface 11
Logarithmic scale 11d is outside of a, and time conversion scale 11 is inside.
e is constituted by printing. Above the fixed scale ring 11, a cover glass 17 radially presses a plastic ring 16 provided between the cover 15 and the body 15, and is held and fixed to the body 15 in a watertight manner. A rotating display ring 13 is fixed to the outer peripheral biting portion 15b of the body 15 by caulking and fixing, etc.
The display ring 13 is provided so as to be detachable and rotatable, and one or more openings 13 a are provided in a part of the display ring 13. The opening 13a is an arc-shaped and groove-shaped opening. Outside the window, a correction calculation scale for correcting the true speed (true air speed), true altitude and the like generally used as a navigation board. 13b is configured. Rotation display ring 1
Inside FIG. 3, a logarithmic scale and a conversion scale scale similar to FIG. 1 are configured, and a conversion scale 13c for Celsius and Fahrenheit is provided. Reference numeral 19 denotes an auxiliary graduation plate, which is positioned in the rotational direction with respect to the fixed graduation ring 11 so that correction calculation can be performed at the opening of the rotary display ring 13 and the upper groove 15 of the barrel 15 is provided.
It is fixed to c by adhesion or the like. When only one correction calculation is performed, only one opening is required.
The opening 13a of the rotary display ring is formed at a symmetrical position of 0 ° and at three places of 120 ° in three cases. An auxiliary graduation is formed at a position corresponding to.

In both FIGS. 2 and 3, the inner end of the rotary display ring is formed at a position overlapping with the plastic ring of the body, and the logarithmic scale on the fixed scale ring is extended to the glass outer shape. The logarithmic scales of the two abut as shown in FIGS. 1 and 4, so that the calculation can be easily read. In both configurations, the fixed scale may be formed by printing on the inner surface of the cover glass, positioned and fixed to the body.

〔The invention's effect〕

According to the present invention, in a configuration having a plurality of rows of multiple scales extending inside and outside the glass, by providing a positioning mechanism in the rotating direction, the dial scale and the fixed scale of the fixed scale ring, which are the central display, are provided. Three multi-row scales of the rotary scale of the rotating ring can be configured with high accuracy, and calculation and conversion can be performed in multiple rows, and errors can be reduced with high accuracy.

[Brief description of the drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a partial longitudinal sectional view showing its structure, FIG. 3 is a partial longitudinal sectional view showing another embodiment of the present invention, and FIG. Partial view of the plan view. 1, 11 ... fixed scale ring 1d, 3a, 11d, 13d ... logarithmic scale 3, 13 ... rotary display ring 3c, 13c ... scale scale 19 ... auxiliary scale plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G04B 19/28 G04B 47/06

Claims (2)

(57) [Claims] 1. A scale display unit having a logarithmic scale on an upper surface thereof and a fixed scale ring having a rising portion having a return surface on an inner side. It is positioned in the rotation direction by the engagement of the non-circular part of the part and placed, and the plastic ring provided between the body and the cover glass made of inorganic glass is pressed in the radial direction to fix it watertight. A rotating display ring fixed to an upper portion of a rotating bezel main body configured to be detachable and rotatable via an elastic member on an outer peripheral portion of the body so that an inner diameter thereof overlaps the plastic ring in a plane, and A timepiece with a navigation calculator, wherein a logarithmic scale, a distance scale, a weight scale or a fuel scale, and a 360 ° division scale are provided on a display ring. 2. A fixed scale ring constituting a scale display section having a logarithmic scale on an upper surface portion is positioned and mounted on a step portion of an inner wall of a body, and a cover glass made of inorganic glass is watertightly mounted on the body at an upper portion thereof. While being fixed, an outer peripheral portion of the body is provided with a groove-shaped opening on an arc in a part of a rotation display ring fixed to an upper part of a rotating bezel body configured to be detachable and rotatable via an elastic member, Auxiliary scales for correction calculation of true speed, true altitude, etc. are provided in the openings, conversion scales such as Celsius and Fahrenheit conversion scales, distance scales, weight scales, etc. A timepiece with a navigation calculation device, wherein an auxiliary scale plate provided with an auxiliary scale is fixed to an upper surface portion of the body located below the opening.