Fastening device for a wristwatch band and the like

Claim 2

A fastening device for use in connection with a wristwatch band and the like which band comprises a pair of partially overlapping rigid similar first and second arcuate band sections, the latter having a plurality of equally spaced holes in the longitudinal direction thereof and said first band section having a slit adjacent to one end, said fastening device comprising an upper rigid arcuate plate member of a substantially inverted Ushape adapted to be secured to said first band section and having a lip bent downwardly at one end engaging in said slit in the first band section and another lip bent downwardly and then inwardly at the other end in a slight spaced relation to the inner surface of the upper plate member, a similarly arcuate lower rigid plate member unitarily secured to said upper plate member in a spaced relation to the inner surface of the latter and having guide lips at the opposite ends over which the second band section may slide, an elongated leaf spring pawl member having one end received in the space defined by said inner surface of the upper plate member and the downwardly and inwardly bent lip at the other end of the upper plate member and the other end bent into a substantially V-shape with the apex adapted to be selectively inserted in one of the holes in the other unslitted band section, the tip of the outer leg of said V-shape bent end of the pawl member extending forwardly and horizontally, and a leaf spring stopper member having one end engaging and held by the undersurface of said forwardly and horizontally extending tip of the V-shape bent end of the pawl member and the other end projecting upwardly through said slit of the first band section.

Claim 3

A fastening device as set forth in claim 1, in which said upper plate member further has the opposite sidewalls bent substantially at right angles with respect to the top wall thereof and each of said sidewalls is provided at the lower edge with extensions bent substantially at right angles with respect to the associated sidewall and in parallel to said top wall of the associated plate member, said extensions being caulked against The bottom surface of said lower plate member thereby to form a box shape unit having a substantially rectangular cross section opening between the upper and lower plate members through which said second band section may pass slidably.

Claim 4

A fastening device as set forth in claim 1, said other end of the stopper member projecting upwardly through said slit in the first band section normally abuts against the top wall of said upper plate member so as to hold said apex of the V-shape bent end of the pawl member in a selected one of the plural holes in the unslitted band section and when the upwardly projecting end of the stopper member is raised by a human fingertip away from the top wall of the upper plate member, the lower end of the stopper member which engages the undersurface of said forwardly and horizontally extending outer leg of the V-shape bent end of the pawl member pushes the leg upwardly thereby to pull the apex of the V-shape out of said selected hole in the second band section.

Claim 5

A fastening device for use in connection with a wristwatch band and the like which band comprises a pair of partially overlapping rigid similar first and second arcuate band sections, the latter having a plurality of equally spaced holes in the longitudinal direction thereof and said first band section having a slit adjacent to one end, said fastening device comprising an upper rigid arcuate plate member of a substantially inverted U-shape adapted to be secured to said first band section and having a lip bent downwardly at one end engaging in said slit in the first band section and another lip bent downwardly and then inwardly at the other end in a slight spaced relation to the inner surface of the upper plate member, a similarly arcuate lower rigid plate member unitarily secured to said upper plate member in a spaced relation to the inner surface of the latter and having guide lips at the opposite ends over which the second band section may slide, an elongated leaf spring pawl member having one end received in the space defined by said inner surface of the upper plate member and the downwardly and inwardly bent lip at the other end of the upper plate member and the other end extending forwardly and substantially horizontally, and a leaf spring stopper member having an upper end portion projecting upwardly through said slit in the first band section and a lower end portion bent into a substantially V-shape with the apex of the V-shape adapted to be inserted in a selected one of said plural holes in the second band section, the extreme end of the lower end portion of the stopper member normally abutting against and being held by the lower surface of said forwardly and horizontally extending other end of the pawl member.

Claim 6

A fastening device for use in connection with a wristwatch band and the like which band comprises a pair of partially overlapping rigid similar first and second arcuate band sections, the latter having a plurality of equally spaced holes in the longitudinal direction thereof and said first band section having a slit adjacent to one end, said fastening device comprising an upper rigid arcuate plate member of a substantially inverted U-shape adapted to be secured to said first band section and having a lip bent downwardly at one end engaging in said slit in the first band section and another lip bent downwardly and then inwardly at the other end in a slight spaced relation to the inner surface of the upper plate member, a similarly arcuate lower rigid plate member unitarily secured to said upper plate member in a spaced relation to the inner surface of the latter and having guide lips at the opposite ends over which the second band section may slide, an elongated leaf spring pawl member having one end received in the space defined by said inner surface of the upper plate member and the downwardly and inwardly bent lip at the other end of the upper plate member and the other end extending forwardly and substantially horizontally, and a leaf spring stopper member having an upper end portion projecting upwardly through said slit in the first band section and a lower end portion bent into a substantially V-shape with the apex of the V-shape adapted to be inserted in a selected one of said plural holes in the second band section, the extreme end of the lower end portion of the stopper member normally abutting against and being held by the lower surface of said forwardly and horizontally extending other end of the pawl member.