US2221495A - Straight bar knitting machine - Google Patents

Description

NOV. l2, 1940 H w, START EI-AL 2,221,495

STRAIGHT BAR KNITTING MACHINE Filed Dec. 12, 1959 2 Sheets-Shes*l l Fgi.

Nov'. 12, 1946. H, w, START UAL 2,221,495

STRAIGHT BAR KNITTING MACHINE i Filed Dec. 12, 1959 2 Sheets-Sheet 2 Patented Nom-12, 1940 s i i '2,221,495

UNITED `STATES, PATENT OFFICE 'STRAIGHT' BAR. KNIT'IING MACHINE `Harry Wilfred start, carlton, and Ernest start, Wilford, England Application December 12, 1939, Serial No. 308,844 In Great Britain November 22, 1938 4 Claims. (Cl. 66-109) This invention relates to improvements in shaft F, which is adapted to impart the required straight-bar knitting machines of the Cotton rising and falling movements to the needle-bar. type, in which the knocking-over bits in each A dependent arm Gis attached tothe needledivision are carried on a bar which is disposed bar, and the lower end of this arm is connected 5 at the front of the needle-bar, and its object is by means of a link G1 to a dependent cam` lever 5 to provide simple means whereby the knocking- G2 which is mounted on a separate shaft as over bar can be moved forward with the needle shown, and the lower end oi this cam lever G2 bar when the latter is disconnected from its is fitted with an anti-friction roller which bears presser cam lever in order to put it out of action. on a presser cam on the main cam shaft F, which The placing of the knocking-over bar in the is adapted to impart the required pressing move- 10 front of the needle-bar is adopted in knitting ments to the needle-bar. machines which are adapted to knit tabs or the The knocking-over bar H which is disposed in like at an intermediate point in a stocking or front of the needle-bar, is carried on two short other garment, and which latter has to be run arms H1 (only one of which is shown) which on the needles so that the rst course of the tab` are provided with adjustable fork-shaped ends 15 can be knitted thereto. Whilst knitting this first H3 which engage with pins in the free ends of two course, a part of the garment has to be located arms H2 on a rocking or auxiliary shaft J which at the back of the needle bar, and this can be is disposed in bearings at the rear of the needlereadily effected when the knocking-over har does bar A. This rear rocking shaft J has a dependent not occupy the usual position at the back of the cam lever J1 secured thereto, and the lower end y20 needle-bar. of this cam lever is tted with an anti-friction According to this invention, provision is made roller which bears on a cam on the main cam` whereby the knocking-over bar associated with shaft F, which is adapted to impart the required each needle bar of the machine is coupled to and rising and falling movements to the knockingmoved forward at the same time as the needleover bar, and the to and away movements of the "25 bar, as is necessary when the needle-bar is dissaid bar relatively to the presser are effected by connected from its presser cam lever in order to the following arrangement. put it out of action. The upper ends of the knocking-over bar arms This invention will now `be more particularly H1 are connected by a link K to the upper end described with reference to the accompanying of an arm L secured on a second rocking or 30 drawings, in which auxiliary shaft M disposed in the front of the Fig. l is a sectional elevation, and knocking-over bar. The link K is pivoted at one Fig. 2 is a front elevation of part of a straight end to the arm H1 and its other end is provided bar knitting machine constructed according to with a fork Kl which engages with a pin L1 in `our invention and the free end of the arm L, and is maintained in 35 Fig. 8 is a detail plan of mechanism for withconnection with the pin L1 by a spring N condrawing the knocking-over bar independently oi nected between the arms H1 and L.

the needle-bar. Rocking motion is transmitted to the front Like letters indicate like parts throughout the shaft M bya bell crank lever M2 pivoted loosely o drawings. on the shaft M and provided with an anti-frico In carrying out this invention, the needle-bar tion roller at one end which engages with a cam is carried and actuated as usual by a system of on the main shaft F whilst the other end is procam` actuated links and levers, which are acvided with a pin Ml which engages with anarm cording to the present invention arranged in the O secured on the shaft M. following manner. In order that the knocking-over bar may be Each needle-bar A provided in the machine moved forward with the needle-bar when the is disposed on the upper ends of two arms B (only latter is moved forward out of action one or more one of which is shown in the drawings) hereinabutments P are provided on the needle-bar and after called needle-bar arms, which are connected this abutment engages with corresponding abutby pins B1 to the free end of arms C which are ments Q on the knocking-over bar when the 50 secured on a rocking shaft D disposed in bearings needle bar is in its highest position as shown in at the front of the machine. Secured on this Fig. 1 so that the knocking-over bar is moved front rocking shaft D is a dependent cam lever forward with the needle-bar. When the needle- E, and its lower end is fitted with an anti-friction bar moves down into its knitting position the roller which bears on a cam on the main cam abutments P are below the abutments Q so that 55 the needle-bar is free to make the motions necessary for knitting a course.

With the arrangement described the needlebar and knocking-over bar are moved forward together in order to run a fresh blank on the needles and that part at the front of the needles conveniently placed in position on the knockingover bits before the latter and the needles are restored to their normal position.

In order that the knocking-over bar may be withdrawn independently of the needle-bar so that access may be had to the latter, a hand lever R is provided which is connected by a link S` to the arm O previously described so that by operating the hand lever R the shaft M can be angularly adjusted and the knocking-over bar withdrawn clear of the needle-bar. A catch may be provided in connection with the handle so that the knocking-over bar can be retained in its withdrawn position.

What we claim as our invention is:

1. A straight bar knitting machine comprising in combination, a thread guide, a needle bar, a set of needles carried by said needle bar, sinkers, a presser, means for operating the needles to cause them to knit, a knocking-.over bar disposed in front of said needle bar, knocking-over bits carried by said knocking-over bar, a main shaft having cam means thereon, an auxiliary shaft movable by the cam means on said main shaft, depending arms on said knocking-over bar and operated by connection with said auxiliary shaft for effecting raising and lowering of the knocking-over bar, a second auxiliary shaft movable by the means on said main shaft, a link connected between said knocking-over bar and said second auxiliary shaft for moving the knockingover bar toward and away fromsaid presser, and at least one abutment on said needle bar engageable with a corresponding abutment on said knocking-over bar for moving the said knocking- 'over bar forward when the needle bar is moved to its inoperative position.

2,. A straight bar knitting machine comprising in combination, a thread guide, a needle bar, a set of needles carried by said needle bar, sinkers, a presser, means for operating the needles to cause them to knit, a knocking-over bar disposed in front of said needle bar, knocking-over bits carried by said knocking-over bar, a rocker shaft disposed in rear of said needle bar, an arm secured to said rocker shaft and'having a pin at the free end thereof, a depending arm connected to said knocking-over bar and having a forked end engaging said pin whereby to effect raising and lowering of the knocking-over bar upon movement of said rocker shaft, a second rocker shaft disposed in front of said needle bar, an arm secured to said second rocker shaft and having a pin at the free end thereof, a link having one end connected to said knocking-over bar and having a fork at the opposite end thereof in engagement with the second said pin, spring means for holding the fork in engagement with the second said pin whereby to effect movement of the knocking-over .bar toward and away from said presser upon movement of said second rocker shaft, and at least one abutment on said needle bar engageable with a corresponding abutment on said knocking-over bar for moving the knocking-over bar forward when the needle bar is in its highest position and is moved forward to its inoperative position.

3. A straight bar knitting machine comprising in combination, a thread guide, a needle bar, a set of needles carried by said needle bar, sinkers, a presser, means for operating the needles to cause them to knit, a knocking-over bar disposed in front of said needle bar, knocking-over bits carried by said knocking-over bar, a rocker shaft disposed in rear of said needle bar, means connecting said rocker shaft to said knocking-over bar for effecting raising and lowering of the said knocking-over bar, a second rocker shaft disposed in front of said needle bar, a link having one end connected to said knocking-over bar and having a. fork at the opposite end thereof, an arm movable with said second rocker shaft and having a pin in one end thereof engageable with the fork at the end of said link, a spring for maintaining the fork in engagement with said pin, a bell crank lever loosely mounted on said second rocker shaft, a main shaft having cam means for operating the bell crank lever, a second arm secured to said second rocker shaft, a pin on said bell crank lever engageable with said second arm for effecting movement of the knocking-over bar toward and away from said presser, and at least one abutment on said needle bar engageable with a corresponding abutment on said knocking-over bar for moving the knocking-over bar forward when the needle bar is in its highest position and is moved forward to its inoperative position.

4. A straight bar knitting machine comprising in combination, a thread guide, a needle bar, a set of needles carried by said needle bar, sinkers, a presser, means for operating the needles to cause them to knit, a knocking-over bar disposed in front of said needle bar, knocking-over bits carried by said knocking-over bar, a rocker shaft disposed in rear of said needle bar, means connecting said rocker shaft with said knockingover bar for effecting the raising and lowering of the said knocking-over bar, a second rocker shaft disposed in front of said needle bar, an arm secured to said second rocker shaft, a link having one end connected to said knocking-over bar and having the opposite end thereof in engagement with the end of said arm, a spring for maintaining the opposite end of said link in engagement with said arm, means for moving said second rocker shaft for effecting movement of said knocking-over bar toward and away from said presser, at least one abutment on said needle bar engageable with a corresponding abutment on said knocking-over bar for moving the knockingover bar forward when the needle bar is in its highest position and is moved forward to its inoperative position, a second arm secured to said second rocker shaft, a second link connected to said second arm, and a manually operated lever connected to said second link for moving the said second rocker shaft whereby to withdraw the knocking-over bar independently of the needle bar. l

HARRY WILFRED START. ERNEST START.

Images