GB2029201A - A device suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments - Google Patents
A device suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments Download PDFInfo
- Publication number
- GB2029201A GB2029201A GB7834028A GB7834028A GB2029201A GB 2029201 A GB2029201 A GB 2029201A GB 7834028 A GB7834028 A GB 7834028A GB 7834028 A GB7834028 A GB 7834028A GB 2029201 A GB2029201 A GB 2029201A
- Authority
- GB
- United Kingdom
- Prior art keywords
- teeth
- mounting member
- projection
- handle member
- handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/41—Cleaning of heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25G—HANDLES FOR HAND IMPLEMENTS
- B25G1/00—Handle constructions
- B25G1/06—Handle constructions reversible or adjustable for position
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
A device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments comprises an elongate member B provided with a tape head cleaning pad 28 at one end and notches 14 at the other end, handle 31, and a part C provided with a projection which engages one of the notches, the arrangement being such that member B may be positioned at different angles relative to the handle. The pad may be covered by a protective cap 18 and may be mounted on a resilient C-shaped member D which snap-fits onto member B. In a modification, see Fig. 20, interengaging teeth and notches are provided on the contacting faces of members 34, 36, which are held in the desired position by means of a screw 39 located in internally-threaded bush 38. <IMAGE>
Description
SPECIFICATION
A device suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments
According to a first aspect of the invention, there is provided a device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the device including an elongate mounting member, a tape head cleaning pad mounted on the mounting member, an elongate handle member, a number of notches in material carried by one of said members and a projection carried by the other of said members which can pro jest into any chosen one of the notches whereby the mounting member can have any chosen one of a plurality of possible orientations relative to the handle member, the device including means for holding the mounting member, in the chosen orientation, on to the handle member.
Preferably, the pad is carried on the exterior of a somewhat C-shaped resilient member which is carried by the mounting member and is readily removable from it. The height of the C is preferably less than 2 cm, preferably less than 1 cm., and when this height is forcibly increased it tends to return to its original value when the resilient member is released.
Preferably, the mounting member has a somewhat
T-shaped part and the cross-arm of the T lies within the C and is broader than the gap in the C.
In one example, the notches are between teeth in a part-ring of teeth corresponding in shape to part of a spur gear wheel and the projection is movable from a position in which it lies partly between two adjacent ones of the teeth and prevents the teeth turning with respect to the projection to a position in which it leaves the teeth free to turn with respect to the projection. Preferably, the projection moves between said positions along a path parallel to the axis of the part-ring of teeth.
In another example, teeth of a ring of teeth on the mounting member lie between teeth of a ring of teeth on the handle member, said projection being one of the teeth on one member and said notches being between adjacent teeth on the other member.
According to a second aspect of the invention, there is provided a cleaner which is suitable for use in cleaning magnetic heads of magnetictape recording and/or playback instruments, the cleaner including a tape head cleaning pad carried on the exterior of a somewhat C-shaped memberwhich is resilient and tends to return to its original height, which is below 2 cm, when its height is forcibly increased.
According to a third aspect of the invention, there is provided a cleaning device including a cleaner according to the second aspect of the invention,
mounted on a somewhat T-shaped part of a holder, the cross-arm of the T lying within the C and being broader than the gap in the C.
According to a fourth aspect of the invention, there
is provided a kit of parts suitable for use in making a cleaning device which is suitable for use in cleaning
magnetic heads of magnetic tape recording and/or
playback instruments, the kit including a tape head cleaning pad carried on the exterior of a somewhat
C-shaped member which is resilient and tends to return to its original height, which is below 2 cm, when its height is forcibly increased and the kit further including a holder on which said member can be snap-fitted.
According to a fifth aspect of the invention, there is provided a device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the device including an elongate mounting member, an enlargement at one end of the member, a somewhat C-shaped resilient member snap-fitted on said one end of the member, the width of the gap of the C being less than the width of said enlargement so that said enlargement can be pulled through said gap only upon distorting said resilient member against its resilience, a tape head cleaning pad secured to the exterior face of said resilient member, a part-ring of teeth on the mounting member at its other end and corresponding in shape to part of a spur gear wheel, an elongate handle member providing bearings for rotational movement of the mounting member with respect to the handle member about the axis of said part-ring of teeth, a detent member mounted in the handle member for sliding transversely with respect to it and parallel to said axis and having two parts exposed at opposite sides of the handle member whereby by pushing said parts alternately the detent member can be moved between first and second positions, a projection carried by the detent member which in said first position projects between two of said teeth, which two it is depending upon the orientation of the mounting member with respect to the handle member, and prevents a change in said orientation, and in said second position leaves the mounting member free to rotate about said axis with respect to the handle member.
Examples in accordance with the invention are described below with reference to the accompanying drawings, in which: Figure 1 shows a plan view of a first part of a device for use in cleaning magnetic heads of magnetic recording and/or playback instruments,
Figures 2 to 5 show sectional views of the same part, taken as indicated by the lines and arrows 11, Ill, IV, and V, respectively, in Figure 1,
Figures 6 and 7 show two side views of a second part of the same device,
Figure 8 shows a plan view of a third part of the device,
Figures 9 to 11 show three side views of the same part,
Figure 12 shows a plan view of a fourth part of the device,
Figure 13 shows an end view of the fourth part,
Figure 14 shows an end view of a fifth part of the
device,
Figure 15 shows a sectional view of the same part, taken as indicated by the lines and arrows XV in Fig
ure 14,
Figure 16 shows an end view of a sixth part of the
device,
Figure 17 shows a sectional view of the same part, taken as indicated by the lines and arrows XVII in
Figure 15,
Figure 18 shows the device assembled,
Figure 19 shows a plan view of part of a second device for use in cleaning magnetic heads of magnetic recording and/or playback instruments,
Figure 20 shows a side view of the same part of the second device,
Figure 21 shows a detail of Figure 20, and
Figure 22 shows a further part of the second device,
Figures 1 to 5 show an elongate nylon moulding A of which parts 1 and 2 are trough-shaped and of semi-circular cross-section and are joined by a thinner flat portion 3.At opposite ends the moulding has similar openings in the form of blind holes 4 and their mouths can be brought face to face with their axes in alignment by folding the portion 3 at its centre, as shown in Figure 18. Between the holes 4 and the parts 1 and 2 there are throughgoing holes 5 and 6, of which the hole 5 is broader than the hole 6, and holes 7 and 8 through end walls 9 and 10 of the trough-shaped parts 1 and 2 open into the holes 5 and 6, the upper ends 11 and 12 of which are widened. On each of the parts 1 and 2 there are two ribs 13 on the outside of the trought and extending along it.
Figures 6 and 7 show another elongate nylon moulding B which is formed at one end with a partring of seven teeth 14, like part of a spur gear wheel with axis 15, notches 14A being formed between the teeth 14. The axis 15 is also the axis of two similar stub shafts 16 which project into the holes 4 of the moulding A when this is folded as shown in Figure 18, whereby a bearing is provided for rotation of the moulding B aboutthe axis 15 with respecttothe moulding A. The moulding B also has ribs 17 whereby this moulding is a light push fit into one end of a tubular cap 18 (Figure 18) the end of which bears against aflange 19 on the moulding B. At the end of the moulding B remote from the teeth 14 is a somewhat T-shaped part, the cross-arm of which is referenced 20 and the stalk of which is referenced 21.
Figures 8 to 11 show a third elongate nylon moulding C which has convexly rounded ends 22 and 23, is broader at the lower end than atthe upper end (see
Figure 10), has at one side a substantially V-shaped projection 24, which can extend partly into any chosen one of the notches 14A and has at the other side a square projection 25. This moulding goes in the holes 5 and 6 of the moulding A and can be moved up and down (considering Figure 18) by pressing on its ends 22 and 23 so that when down (as shown in
Figure 18) the projection 24 leaves the teeth 14 free to rotate with respect to the moulding A and when up the projection 24 extends partly within one of the
notches 14A and prevents such rotation. The material of the moulding A which surrounds the holes 4
holds the moulding A on to the moulding B.
Afourth nylon moulding D, shown in Figures 12
and 13, is in the form of a shorttrough of somewhat
C-shaped cross-section, although it has beads 26
and shoulders 27. On the exterior face of the mould
ing D and on the beads, but not on the shoulders,
there is secured by an adhesive a pad in the form of a
layer 28 of velvet or the equivalent or some other material suitable for use in cleaning magnetic heads.
The moulding D is resilient so that if the height of the
C (measured from leftto right in Figure 13) is forcibly increased from its normal value of less than 1 cm, it tends to decrease again and will do so when the moulding is released. The moulding D is a snap-fit on to the somewhat T-shaped part of the moulding
B, i.e. the cross-arm 20 can be pushed into the opening 29 of the C, forcing the beads 26 apart, and into the C and then the beads spring back so that the shoulders 27 face shoulders 30 on the moulding B and the moulding D with its layer 28 cannot fall off the moulding B although it can be pulled off to replace it by another assembly of moulding D and layer 28 when the original is dirty.
The tubular cap 18 is made of aluminium tubing and is simply to keep the layer 28 clean when the device is not in use. At the end remote from the flange 19, a moulded nylon plug E (Figures 14 and 15) closes the tubing. Similar tubing forms a handle 31 much longerthan the cap 18 and owing to the ribs 13 one end of this is a light push fit on to the moulding A when the latter is folded. A moulded nylon plug F (Figures 16 and 17) with ribs 32 on it is a light push fit into the other end of the handle 31.
By pushing the moulding C downwardly (Figure 18), turning the moulding B to the desired position and then pushing the moulding C upwardly, any desired one of eight different angles between the axis of the moulding B and the axis of the handle 31 may be selected and the projection 24 on the moulding C prevents this angle from changing.
Figures 19 and 20 show a tubular aluminium handle 43 into one end of which is pushed a plug 33 and into the other end of which is pushed one end of a moulding 34 having a ring of teeth 35 at its other end on its upper side (considering Figure 20). A moulding 36 has at one end a ring of teeth 37 on the lower side (considering Figure 20) which projects into notches 35A between adjacent ones of the teeth 35, one of these teeth being shown diagrammatically in Figure 19 by dotted lines. An internally threaded bush 38 fits into a hole in the moulding 36 and into it is driven a screw 39 which holds the mouldings 34 and 36 together with the desired orientation of one with respect to the other. The axis of the bush and the screw is referenced 40 and on this axis lie the centres of the rings of teeth. The moulding 36 has an enlargement41 with a rounded nose 42 which can be pushed into the opening 43 in a somewhat
C-shaped structured less than 1 cm high and consisting of a somewhat C-shaped resilient sheet metal
member with a covering of velvet or the like stuck to it. The ends of the C snap behind the enlargement 41
because when the height of the C is forcibly
increased it tends to be reduced again to its former value when the C is released.
Because the angle between the parts B and 31 in the example according to Figures 1 to 18 and the
angle between the parts 43 and 36 in the example
according to Figures 19 to 22 can be chosen from a
number of available angles and can be fixed when
chosen, the two devices can readily be used to clean
magnetic heads of a number of different kinds of
magnetic tape recording and/or playback instru ments. They can also be used to clean capstans, pinch wheels and tape guide pins on such instruments.
Claims (15)
1. A device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the device including an elongate mounting member, a tape head cleaning pad mounted on the mounting member, an elongate handle member, a number of notches in material carried by one of said members and a projection carried by the other of said members which can project into any chosen one of the notches whereby the mounting member can have any chosen one of a plurality of possible orientations relative to the handle member, the device including means for holding the mounting member, in the chosen orientation, on to the handle member.
2. A device according to claim 1 in which the pad is carried on the exterior of a somewhat C-shaped resilient member which is carried bythe mounting member and is readily removable from it.
3. A device according to claim 2 in which the mounting member has a somewhat T-shaped part and the cross-arm of the T lies within the C and is broader than the gap in the C.
4. A device according to any preceding claim in which the notches are between teeth in a part-ring of teeth corresponding in shape to part of a spur gear wheel and the projection is movable from a position in which it lies partly between two adjacent ones of the teeth and prevents the teeth turning with respect to the projection to a position in which it leaves the teeth free to turn with respect to the projection.
5. A device according to claim 4 in which the projection moves between said positions along a path parallel to the axis of the part-ring of teeth.
6. A device according to any preceding claim in which the mounting member has the notches at one end of it and projecting outwardly from it in opposite directions are two stub shafts which extend into openings in the handle member, the material of the handle member surrounding the openings being the means whereby the mounting member is held, in the chosen orientation, on to the handle member.
7. A device according to claim 5 or claims 5 and 6 in which the projection is carried on a detent member which has two parts exposed on opposite sides of the handle member, pressure on one of these parts causing the projection to move from one of said positions to the other position and pressure on the other part causing the projection to move from said other position to said one position.
8. A device according to any preceding claim in which the handle member consists of two parts, one of which is elongate and has been made by folding a longer elongate part in two, the other part being a tube into which said one part has been inserted.
9. A device according to any preceding claim having a tubular cover provided with an end closure for fitting on the assembly of the mounting member and the handle member.
10. A device according to claim 1 in which teeth of a ring of teeth on the mounting member lie between teeth of a ring of teeth on the handle member, said projection being one of the teeth on one member and said notches being between adjacent teeth on the other member.
11. A device suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the device including a handle member, a tape head cleaning pad and a mounting member on which the pad is mounted, the device being substantially as described above with reference to Figures 1 to 18 or 19 to 22 of the accompanying drawings.
12. A cleaner which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the cleaner including a tape head cleaning pad carried on the exterior of a somewhat C-shaped member which is resilient and tends to return to its original height, which is below 2 cm, when its height is forcibly increased.
13. A cleaning device including a cleaner according to claim 12 mounted on a somewhat T-shaped part of a holder, the cross-arm of the T lying within the C and being broader than the gap in the C.
14. A kit of parts suitable for use in making a cleaning device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the kit including a tap head cleaning pad carried on the exterior of a somewhat
C-shaped member which is resilient and tends to return to its original height, which is below 2 cm, when its height is forcibly increased and the kit further including a holder on which said member can be snap-fitted.
15. A device suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the device including a handle member, a tape head cleaning pad and a mounting member on which the pad is mounted, the device being substantially as described above with reference to Figures 1 to 18 or 19 to 22 of the accompanying drawings.
15. A device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the device including an elongate mounting member, an enlargement at one end of the member, a somewhat C-shaped resilient member snap-fitted on said one end of the member, the width of the gap of the C being less than the width of said enlargement so that said enlargement can be pulled through said gap only upon distorting said resilient member against it resilience, a tape head cleaning pad secured to the exterior face of said resilient member, a part-ring of teeth on the mounting member at its other end and corresponding in shape to part of a spur gear wheel, an elongate handle member providing bearings for rotational movementofthe mounting memberwith respectto the handle member about the axis of said part-ring of teeth, a detent member mounted in the handle member for sliding transversely with respect to it and parallel to said axis and having two parts exposed at opposite sides of the handle member whereby by pushing said parts alternately the detent member can be moved between first and second positions, a projection carried by the detent member which in said first position projects between two of said teeth, which two it is depending upon the orientation of the mounting member with respecttothe handle member, and prevents a change in said orientation, and in said second position leaves the mounting member free to rotate about said axis with respect to the handle member.
16. A device according to claim lOin which the two rings of teeth are co-axial, an internally screw threaded bush is inserted into one of the two members (i.e. the mounting member and the handle member) and a screw passes through the other one of these members and is screwed into the bush.
New claims filed on30 May 1979 CLAIMS
1. A device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the device including a mounting member, a tape head cleaning pad mounted on the mounting member, an elongate handle member, a number of notches in material carried by one of said members and a projection carried by the other of said members which can project into any chosen one of the notches whereby the mounting member can have any chosen one of a plurality of possible orientations relative to the handle member, the device including means for holding the mounting member, in the chosen orientation, on to the handle member.
2. A device according to claim 1 in which the pad is carried on the exterior of a somewhat C-shaped resilient member which is carried by the mounting member and is readily removable from it.
3. A device according to claim 2 in which the mounting member has a somewhatT-shaped part and the cross-arm of the T lies within the C and is broader than the gap in the C.
4. A device according to any preceding claim in which the notches are between teeth in a part-ring of teeth corresponding in shape to part of a spur gear wheel and the projection is movable from a position in which it lies partly between two adjacent ones of the teeth and prevents the teeth turning with respect to the projection to a position in which it leaves the teeth free to turn with respect to the projection.
5. A device according to claim 4 in which the projection moves between said positions along a path parallel to the axis of the part-ring of teeth.
6. A device according to any preceding claim in which the notches are in material carried by the mounting member and projecting outwardly from it in opposite directions are two stub shafts which extend into openings in the handle member, the material of the handle member surrounding the openings being the means whereby the mounting member is held, in the chosen orientation, on to the handle member.
7. A device according to claim 5 or claims 5 and 6 in which the projection is carried on a detent member which has two parts exposed on opposite sides of the the handle member, pressure on one of these parts causing the projection to move from one of said positions to the other position and pressure on the other part causing the projection to move from said other position to said one position.
8. A device according to claim 5, claims 5 and 6
or claim 7 in which the projection is carried on a
detent member which is a single straight piece of
material, a first portion of which has a local thicken
ing providing said projection, a second portion of the
detent member facing and lying very close to said part-ring of teeth in the second position of the detent member.
9. A device according to any preceding claim in which the handle member consists of two parts, one of which is elongate and has been made by folding a longer elongate part in two, the other part being a tube into which said one part has been inserted.
10. A device according to any preceding claim having a tubular cover provided with an end closure for fitting on the assembly of the mounting member and the handle member.
11. A device according to claim 1 in which teeth of a ring of teeth on the mounting member lie between teeth of a ring of teeth on the handle member, said projection being one of the teeth on one member and said notches being between adjacent teeth on the other member.
12. A device according to claim 11 in which the two rings of teeth are co-axial, an internally screwthreaded bush is inserted into one of the two members (i.e. the mounting member and the handle member) and a screw passes through the other one of these members and is screwed into the bush.
13. A device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the device including an elongate mounting member, an enlargement at one end of the member, a somewhat C-shaped resilient member snap-fitted on said one end of the member, the width of the gap of the C being less than the width of said enlargement so that said enlargement can be pulled through said gap only upon distorting said resilient member against its resilience, a tape head cleaning pad secured to the exterior face of said resilient member, a part-ring of teeth on the mounting member at its other end and corresponding in shape to part of a spur gear wheel, an elongate handle member providing bearings for rotational movement of the mounting member with respectto the handle member about the axis of said part-ring of teeth, a detent member mounted in the handle member for sliding transversely with respect to it and parallel to said axis and having two parts exposed at opposite sides of the handle member whereby by pushing said parts alternately the detent member can be moved between first and second positions, a projection carried by the detent member which in said first position projects between two of said teeth, which two it is depending upon the orientation of the mounting member with respect to the handle member, and prevents a change in said orientation, and in said second position leaves the mounting member free to rotate about said axis with respect to the handle member.
14. A kit of parts suitable for use in making a cleaning device which is suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments, the kit comprising a tape head cleaning pad carried on the exterior of a somewhat
C-shaped memberwhich is resilient and tends to return to its original height, which is below 2 cm, when its height is forcibly increased and the kit further comprising a mounting member on which said somewhat C-shaped member can be snapfitted, an elongate handle member pivotally con nected to the mounting member, a part-ring of teeth on one of said members corresponding in shape to part of a spur gear wheel, a detent member mounted in the other of said members for sliding transversely with respect to it, parallel to the axis of the part-ring of teeth, between first and second positions, and a projection carried by the detent member which in the first position projects between two adjacent teeth of said part-ring of teeth, which two it is depending upon the orientation of the mounting member with respect to the handle member, and prevents a change in said orientation, and in said second position leaves the mounting member free to rotate about said axis with respect to the handle member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7834028A GB2029201B (en) | 1978-08-21 | 1978-08-21 | Device suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7834028A GB2029201B (en) | 1978-08-21 | 1978-08-21 | Device suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2029201A true GB2029201A (en) | 1980-03-19 |
| GB2029201B GB2029201B (en) | 1982-07-14 |
Family
ID=10499186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7834028A Expired GB2029201B (en) | 1978-08-21 | 1978-08-21 | Device suitable for use in cleaning magnetic heads of magnetic tape recording and/or playback instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2029201B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2164402A (en) * | 1984-07-25 | 1986-03-19 | Houdaille Industries Inc | A tool for tightening and cutting band clamps |
-
1978
- 1978-08-21 GB GB7834028A patent/GB2029201B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2164402A (en) * | 1984-07-25 | 1986-03-19 | Houdaille Industries Inc | A tool for tightening and cutting band clamps |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2029201B (en) | 1982-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |