US1879764A

US1879764A - Guard for carding engines

Info

Publication number: US1879764A
Application number: US472144A
Authority: US
Inventors: Pickford James
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-08-15
Filing date: 1930-07-31
Publication date: 1932-09-27
Anticipated expiration: 1949-09-27

Description

4 Sheets-Sheet 1,

INVENTOR.

ciooJmm 4 my \w n Sept. 27, 1932. J. PICKFORD GUARD FOR CARDING ENGINES Filed July 31, 1930 Se t. 27, 1932.

J. PICKFORD GUARD FOR CARDING ENGINES Filed July 31, 1930 4 Sheets-Sheet 2 I I IIIHII INVENTOR.

1932- J. PICKFORD 1,879,764

GUARD FOR CARDING ENGINES Filed July 31, 1936 4 Sheets-Sheet 5 INVENT OR.

Sept. 27, 1932. HCKFORD 1,879,764

GUARD FOR CARDING ENGINES Filed July 31, 1930 4 Sheets-Sheet 4 INVENTOR.

Patented Sept. 27, 1932 PATENT OFFICE Jane s ncxronn, or OLDHAM, ENGLAND GUARD FOR CARDIN'G ENGINES Application filed July 31, 1930, Serial. No. 472,144, and in Great Britain August 15, 1929.-

f This invention relates to improvements in mechanism for locking the doors of carding engines such mechanism being of the type in which the opening of the door is controlled 5 by a sliding bar which is locked by a loose disc or roller situated in a stationary casing and maintained just clear of the cylinder so that when the latter is in rotation it cannot be moved to unlock the bar, such unlocking being only possible when the cylinder is at rest.

In mechanism ofthis type as hitherto constructed the locking roller or disc was wholly encased within the stationary casing and was operated by a' second loose roller or disc arranged in the same plane asthe locking roller or disc and. engaging the periphery thereof. This loose roller or disc projected through the front of the casing so that when the cylinder was at rest the rotation of the loose roller caused the locking roller to rotate and rise out of engagement with the sliding bar so that the latter was free to slide longitudinally and the door of the carding engine could be unlocked. I

A disadvantage of such locking mechanism lay in the fact that it was possible for the device to be operated when the cylinder was rotating and another disadvantage lay in the fact that it was only applicable to certain types of carding engine since the strap obstructing bar, which prevents the driving belt from being moved on to the fast pulley until the cylinder door is closed, was mounted on the stationary casing. at the side adjacent to the pulley. A further disadvantage lay in the fact that if the locking roller was set too far away from the side of the'cylinder it did not lock the bar.

The object of the present invention is to provide a simpler construction of locking device which cannot be operated when the cyl-- inder is rotating and which will permit of the strap obstructing bar being pivoted on the side of the casing remote from the pulley so that the device can be applied to any type of carding engine.

The invention consists of a single locking roller or disc located in a casing having an aperture above the central axis of the roller or disc such aperture being sufiiciently large to allow access to the periphery of the roller by a finger or fingers only so that the roller or disc cannot be gripped between the fingers, but when the cylinder is at restit can be readily rotatedto cause it torise out of engagement with the sliding bar.

The invention consists further in pivoting a cam member whichoscillates the strap obstructing rod on the side of the casing remote from the driving pulley the end of the sliding bar being provided with a raised or rampsurface to oscillate the cam when the bar is withdrawn, such raised or ramp surface being in front of the surface on which the roller or disc rests when it has been raised out of the locking aperture at the front of the bar and the bar has been moved forward to the door to be opened.

By this construction of lockingdevice the sliding bar connects the arm of the cylinder door directly to the casing and no additional brackets or studs are necessary to carry the strap constructing bar. 7

The invention will be, described with reference to the accompanying drawings N Fig. 1 is side view of part of a carding en gine showing the casing carrying the single locking roller bolted to the framing, the slid-- ing bar being in the position occupied when the door is open.

Fig. 2 is a section on line 2+2 Fig. I.

3 is a side elevation of part of a carding engine showing the casing bolted to the bend, the sliding bar being'in the positionoccupied when the dooris closed.

Fig. 4 is a section on line 44 Fig. 3.

Fig. 5 is a perspective view of easing, locking roller, end of one form of sliding bar and a strap obstructing rod. V

Fig. 6 is a perspective view of end of another form of sliding bar.

Fig. 7 is a vertical section through the easing and locking roller.

Fig. 8 is a section on line 77 Fig. 7 showing the casing bolted to the bend of the carding engine. V

The stationary casing B is bolted to the framing A of the carding. engine as shown mo in Figs. 1 and 2 or to the bend a as shown in Figs. 3 and 4 according to the type of carding engine to which it is applied. A loose roller C is located within the casing B and contactsat c with the side of the cylinder A In the form of the invention shown in Figs. 3 and 4 the strap obstructing member G is of ordinary construction and is arranged on the side of the casing B adjacent to the fast and loose pulley.

In the form of the invention shown in Figs. 1 and 2 the member G is mounted on the side of the casing B remote from the fast and loose pulley, its construction and operation being hereinafter more fully described.

An aperture 6 is formed in the front of the casing B such aperture being above the central axis'of the roller when the latter is in its lowest or locking position, i. e. the position shown in Fig. 7. The periphery of the roller C is level with and projects a very short distance into the aperture 7) so that it can be engaged by the finger or fingers of the operator but cannot be gripped between the fingers.

A transverse slot, groove or passage 6 is formed at the bottom front edge of the easing B to form a guide and support for the sliding bar D which is pivotally connected at itsend dwith the pivoted arm Esupporting thefcylinder door E Thefront end of the bar I) is formed with a recess (Z which is engaged by the roller G when the bar is in the locking position so that the bar cannot be moved until the roller G is rolled upwards to'raise'it out of the slot.

I When the strap obstructing member G is of ordinary construction and is mounted on the side of the casing B adjacent to the fast and loose pulley the recess 6Z1 extends across the bar D and as shown in Figs. 3 and 4 the upper surface ofthe end of the bar is raised and is formed with an incline cl so that after the roller Chas been raised it will not return to its original position as the bar Dis moved. The front end of the bar D engagesthe strap obstructing member G as the rod is moved to move the member G into the obstructing position. I

When" the strap obstructing member G is located on the side of the casing B remote from the fast andloose pulley the end of the bar D is constructed as shown in Fig. 5 or Fig. 6 the recess (Z extending to the front of the bar'D as shown in Fig. 5 or only part way across the end as shown in Fig. 6.

The bar D may be formed with two top surfaces (Z 6Z3 as shown in Fig. 5, the front surface d being the surface which engages and operates the cam F which controls the strap obstructing bar G and the surface (Z being the surface against which the roller C rests after it has been raised out of the recess d and the bar'D has moved into the unlocking position. The surface d comprises. a low surface (i with which the camengages when'the bar D is 'in the locking position, a

steep rise d which rotates the cam F as the bar is being moved and a raised surface cl which holds the cam F in the position to cause the strap obstructing member G to be in the position to prevent the strap being moved on to the fast pulley whilst the door is unlocked. The surface (2 has agradual downward slope (Z7 to the horizontal position (Z extending rearwardly of the bar so that after the roller C has been raised the latter will gradually return to its bottom position as the bar D is moved forward from the looking to. the unlocking position.

In carding engines where there is only a limited space the-end of the bar D may be constructed as shown in Fig. Ginwhich construction the surface d onlyextends to the end of the slope. d. This construction allows the front surface of the 'rodandlthe strap obstructing member Gto be brought further forward away from the side of the machine which'is necessary for certain types of carding engines. .Two brackets orlugs b are formed on the side of the casing'B'r'emote from the driving pulley and carrying a' short shaft 9 on which the strap obstructing bar G is mounted. A cam Fv is alsomounted on this shaft 9 which cam is in engagementwith the surface d of the sliding'bar D.

The construction of the end of the locking bar D as shown in Fi s. 5'or Gensures that the roller O willalways lock the bar in what ever position the latter maybe set in relation tothe'side of the carding engine.

' The locking device operates as'followsz e lVhenthe door E is closed the roller C is situated in the recess d at the end ofthe sliding bar .1) and the: cam F is in engagement with the low portionclof the surface cZ so that the strap obstructing bar is in the position to allow the strap to be moved on to'the fast pulley. If the cylinder A is rotated the frictional contact therewith of the roller C which would occur on any attempt by the operator to rotate the roller C, is too great toallow the latter to be roated by a finger or fingers of the operator to cause it to be raised out of the recess (Hand.

accordingly the bar D is locked and the door E 'cannot be opened. v I

lVhen the cylinder A is at rest the roller (1 can be rotated by the finger or fingers of the operator to cause it to roll on the cylinder A and rise outof the recess (Z in thebar D and the bar can then slide through the casing B and allow the door E to be opened. This movement of the bar D causes the cam F to mount up the steep incline d and consequently to rotate so that the shaft 9 rotates in the lugs b and the strap obstructing bar G moves into the position to prevent the strap from being moved onto the fastpulley. The cam F and strap obstructing bar G in this position until the bar D has been returned 'to its locking position so that the strap cannot be moved on to the fast pulley and the cylinder rotated until the door E has been closed.

What I claim as my invention and desire 5 to protect by Letters Patent is 1. Guards for carding engines of the type referred to comprising the combination with a pivoted arm and a door carried thereby of a bar connected to the pivoted arm, astationary slotted casing through which the bar slides, a locking roller engaging the bar and housed within the casing to project therefrom at both ends and prevent movement of the bar when the cylinder is rotating, a strap obstructing member and a cam carried-by the strap obstructing member to bear upon the bar, the strap obstructing member preventing movement' of the strap until the door is closed. 2. Guards for carding engines of the type referred to comprising the combination with a pivoted arm and a door carried thereby of a transversely recessed bar, a stationary slotted casing through which the bar slides, a locking roller engaging the bar and housed within the casing to project therefrom at both end-s and prevent movement of the bar when the cylinder is rotating, a strap obstructing member and a cam carried by the strap obstructing member to bear upon the bar the strap obstructing member preventing movement of the strap until the door is closed.

3. Guards for carding engines of the type referred to comprising the combination with a pivoted arm and a door carried thereby of a transversely recessed bar, a stationary slotted casing through which the bar slides, a locking roller engaging the bar and housed within the casing to project therefrom at both ends, a strap obstructing member, bearings on the side of the casing, a shaft carried in said bearings upon which the strap obstruc-ting member is pivoted and a cam on said shaft to bear upon the bar.

4. Guards for carding engines of the type referred to comprising the combination with a pivoted arm and a door carried thereby of a transversely recessed double surfaced bar, a stationary slotted casing through which the bar slides, a locking roller engaging the back surface on the bar and housed within the casing to project therefrom at both ends, a strap obstructing member, bearings on the side of the casing, a shaft carried in said bearings upon which the strap obstructing member is mounted and a cam on said shaft bearing upon the front surface of said bar.

In testimony whereof I have hereunto set 0 my hand.

7 JAMES PIGKFORD.