US2418323A - Knocking-over bit construction - Google Patents

Description

April 1, 1947. H. w. START ET AL 2,4183% KNOCK ING-OVER BIT CONSTRUCTION Filed Dec. 19, 1945 ZSheecSe-Sheet 1 /N VE/v TORS Harry Wilfred (Ra l; I'rnesZ" Start.

ATTORNE Vs April 1947' H. w. START ET AL ,418,323

KNOCKING-OVER BIT CONSTRUCTION Filed Dec. 1.9, 1.945 2 Sheets-Sheet 2 //V l/E/V TOA5 Jfizrry Wilfred cYZ-a 7%,

1362682" 15%; 711 Wm M A TTOIF/VE YJ Patented Apr. 1, 1947 2,418,323 K-NOGKING-OVER BIT CONSTRUCTION l larry Wilfred Start, Carlton, and Ernest Start, Wilford, England Application December 19, 1945, Serial No. 635,903

' -In.GreatBritain J uly 31, 1944 strai ht-her kni tin meeb ees d re rs p tiee er t im r ement i meeh e ref th an use; er ni t n the ree t b e eiee ern.1 d w t Fr nch feet in" m k n ste seef with French feet the usual method is to knit a eak mnrieie mel e instep as e l portion of the stocking and this blank is then run onto th ne dl s .9! e maeh ne se e el a a d to kn t e .i e ees ee e the aps er i e a t of the blank. Machines for this purpose are provided with two groups of needles spaced the requ s t e e a ee eret a d @9 $9 1 ided th the ew leek nd d die k a d linea e ve b ts he blan is t e rim onto the needles for the knitting oftheheel tabs whilst the needle is withdrawn e am -.the e er an a this ee ret ee er 7611f by hea t e n edle ma be be t e le s t care i Pee e t a the s net r b w t the transfer points when these are subsequently brought into operation. Furthermore thbjlank when ran on the ne edle has a tendency topull the needles at the s ides of each group inwards so that they foul the sinkers when returned to their normal operative positions. In machines for knitting heel tabs as hitherto constructed the knocking-over bits are carriedf rom one end and as they are of necessity very thin they can give practically no support to the needles to prevent them being displaced from their normal The ebieei o t P se t in en vide additional support to the knocking over bits so that they .can .prevent the-needles being displacedfrom their normal positions and also preven d s a ement 21- the b r hin n th k eeekie werer en According to this invention the knocking-over bits are secured at one end in the knocking-over bar in the usual manner and have their other ends supported in tricks in a bar which is preferably carried so as to move with the knockingover bar. Provision is made for separating the two bars so that access can be had to the needlebar in order that damaged needles can be replaced.

The invention will now be more particularly described with reference to the accompanying drawings in which- Fig. 1 is an end elevation of part of a straightbar knitting machine showing the needle bar and associated knocking-over bits supported at both ends, being secured in a bar at the rear of 2 the needles and engaging in tricks in a bar dis;- posed at the front of the needles, FigfZ is a plan of the knoeking over bits and their supportin bars shown detached i Fig. 3 is a sectional side elevation on the line 0f Fig.2. h Fig. 4 is a sectional side elevation of an alter.- native construction'shoyving the knocking yer bits secured in a bar at the front of .therieedles and engaging in tricks in abarfdisposedat the rear of the needles. l

Like letters indicate like eer e te eeei ee th drawings.

In one method of carrying out this inyention as shown in Fig; 1 fthe kriockin gl-over .bitsAa'ige mounted in the ,usual manneriinlthe knockingover bar B whichlisdifsi dsed .at'the back of ltlie needle-bar C and is carried by the usual arm's D and operated to provide the necessary rioyeiment to the knockingeover bits in well known manner. Disposed on the opposite side [of the needle bar C to the knockingoyer bar B, that is at the front of the needles is a se nd bar This" second bar E is disposed at approximately the same level as the knockingover bar B and is provided with tricks therein to receive the ends of the knocking-over bits A as clearly shown in Fig. 2. This secondbar fil is preferably mounted so that it has a motion corresponding to that of the knockingover bar B so that Wear between the knocking-over bits and the tricks is obviated. For this purpose the second bar E may conveniently be carried arms F which are f eh e the e ieae eriea e it P 86 a t o th re ith f t e e ee the ewe ends of the arms F are connected at (3 to es} tensiqns D on thelower end of the arms-D1 It will be understood that With this'" arra gement the knocking-over bits A are supportedon both sides of the needles C and that provision must be made for separating the two bars B, E, associated with the knocking-over bits A in order that access can be obtained to, the needle-bar C for the changing of needles C Provision for separating the two bars B, E, can be conveniently arranged by pivoting the arms F which carry the second or tricked bar E to the arms D which carry the knocking-over bar B and interconnecting the bars or the arms which carry them by straps adapted to hold the two bars in their operative positions relatively to each other. Provision is made for quickly releasing the straps so that the two bars can be separated to give access to the needle-bar when required. Alternatively a catch H is pivoted on the bar E and engages with a pin J carried by the knockingover bar B. A spring K is provided to hold the catch H in engagement with the pin J.

When the knocking-over bar B is disposed at the front of the needle bar C as shown in Fig. l the rear end of the knocking-over bits A engage in tricks in a bar E disposed at the rear of the needles. The knocking-over bar B is provided with arms D as in the previously described arrangement and the lower ends of the arms D are pivoted at L to the lower ends of the arms F provided on the bar E. The bars B and E are connected together in a similar manner to that described in connection with the previous arrangement and shown in Figs. 1 to 3 of the 'thereto as shown in the drawings.

It will be apparent by reference to Figure 1 that in order to provide theknitting motion to the knocking-over bits, theknocking-over bar and its associated tricked bar are carried by the ends of arms M secured on a shaft N which is angular- :ly adjusted in well known manner by a cam on the mainshaft O of the machine to provide the up and down motion to the knocking-over bits A. The in and out motion of the latter is obtained by a link P which is connected between an arm Q on the knocking-over bar B and one arm of a bell crank lever R, the other arm of which is provided with a truck engaging with a cam on the mainshaft 0. It will be seen that with the knocking over bits supported on both sides of the needles they must be moved forward with the ineedles when the latter are moved clear to the inkers for the work to be run onto them. The needle bar is moved forward in well known manner by 'adjustingthe position of the presser arm S and in order to permit of the knocking-over bits {moving forward at the same time the following arrangement is adapted. The link P is formed ,with a slot at the end connected to the lever R and this slot engages with a pin T on the lever R. The presser arm S is formed with a swell S thereon which is adapted to engage with a pin .P on the link P when the presser arm S is adjusted and disengage the link P from the pin so that the knocking over bits are free to move for- ,ward with the needles.

The link P will automatically re-engage with the pin when the needles are restored to their operative position. A .spring may be provided in connection with the link P to hold it in engagement with the pin T when the needles are in their normal operative position. 7

4 With the arrangement described the knockingover bits are stifiened against lateral movement and consequently can support the needles during the running on operation to prevent them being displaced. Additional support is also provided for the knocking-over bits during the knockingover operation, and this additional support is particularly advantageous where the knocking-over bar is disposed to the front of the needle-bar.

What we claim as our invention is: 1. A straight-bar knitting machine in which the knocking-over bits are secured at one end in a bar and have their other ends supported in tricks in a second bar supported by arms the ends ,of which are pivoted to arms secured to the first bar and held in its operative position relatively to the latter by a disengageable connection.

2. A straight-bar knitting machine having in combination needles, sinkers, knocking-over bits secured at one end in a bar disposed on one side of the needles, arms on the bar, a second bar disposed on the other side of the needles, tricks in the second bar to receive the other ends of the knocking-over bits arms on the second bar pivoted to the arms on the other bar, and a catch on one bar to engage with a pin on the other bar to hold the two bars in operative relationship.

3. A straight bar knitting machine according to claim 2 in which the catch is'pivoted on one bar and is held in engagement with the pin on the other bar by a spring.

4. A straight bar knitting machine according to claim 2'in which the tricked bar is disposed in the front of the needles and the knocking-over bits are secured in a bar disposed at the rear of the needles.

5.'A straight-bar knitting machine according to claim 2 in which the knocking-over bits have 'one end secured in a bar disposed at the front of the needles and have their other ends engaging in tricks in a bar disposed at the back of the needles.

HARRY WILFRED START. ERNEST START.

REFERENCES CITED The following referencesare of record in the file of this patent:

UNITED STATES PATENTS German Aug. 17, 1911

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