GB2183550A - Engraving apparatus - Google Patents

Description

1

GB 2 183 550 A

1

SPECIFICATION

Improvements in engraving apparatus

5 The present invention relates to engraving apparatus for engraving concrete wall surfaces or the like in an elevation position in situ.

A known engraving machine of the type with which the present invention is concerned is descri-10 bed in GB Patent Publication No 2138748.

The present invention provides apparatus for use in engraving an upstanding concretious surface in an elevated position in situ; said apparatus comprising aframe, means on theframefor receiving one or 15 more stencils, a carriage, means supporting the carriage for movement relative to the frame within a plane parallel to the surface to be engraved, an en-gravingtool ortool holder supported bythecarriage for permitting the tool to engage the surface to be 20 engraved, a stencil guide which can be made to followa pattern defined by a stencil by movement of the carriage in said plane, and meansforsupporting the frame in said elevated position alongside the surface to be engraved orfor raising and lowering the 25 frametoandfromsuchaposition.

As is known from GB 2138748 tubular guides or the like can define the directions of movement of the carriage.

Conveniently, the support means for the frame can 30 take the form of a multi-sectional base frame which is adjustable, at least partly, to vary the height of the frame.

Alternatively, the frame can be conveniently mounted to a raisablejiborarm of a vehicle which 35 enables theframe to be raised and lowered toand from the elevated position.

The invention may be understood more readily and various other aspects and features of the invention may become more apparent from consideration 40 ofthefollowing description.

Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, wherein:-

Figure 7 is a perspective view of part of an engrav-45 ing apparatus in accordance with the invention;

Figure 2 is an end elevation of the apparatus constructed in accordance with the invention;

Figure 3 is a front elevation of a unit of a base frame of afurtherform ofapparatus;

50 Figure 4is a side elevation of the unit shown in Figure3;and

Figure 5 depicts a mobile vehicle adapted as the engraving apparatus in accordance with the invention.

55 In the accompanying drawings, the reference numeral 10 denotes a unit composed of various parts of the engraving apparatus used with otherequip-ment described hereinafter. The unit 10 is held in an elevated position or is moved to and from such a 60 position by associated means designated 90 in Figure 1. The unit 10 as depicted in Figure 1 is composed of a frame 11 with side members 28 and a channel-like transverse structure 27 which receives cut-out stencils 18. Bearing blocks or collars 20 are 65 mounted for sliding along a pair of tubular guides 19

disposed between the side members 20. A pair of tubular guides 21 interconnect the blocks 20 and a carriage 12 in turn slidably mounted on the tubular guides 21 with the aid of bearing blocks or collars 22. 70 Theguides21 extendperpendiculartotheguides 19. The carriage 12 extend perpendiculartotheguides 19. The carriage 12 has a handle 24 for displacing the carriage 12 along the guides 21 in the direction of arrows C-D. The guides 21 are additionally connec-75 ted attheirends with a cross-piece serving as a handle 25 for displacing the carriage 12 along the guides 19 in the direction of arrows A-B. The carriage 12 supports a stencil-engaging guide 15 which an operator can displace by moving the carriage 12 as app-80 ropriate to follow the shape of the stencils 18. A . rotary engraving tool 29 with a replaceable hardened bit is likewise supported by a holder on the carriage 12 and follows the path described by the guide 15to permanently markan upstanding surface30, usually 85 a wall of a building, in situ and in an elevated position.

A base frame 50 adjustable with screw devices 51 orthe like can be used as shown in Figure 2to bring the machine into a desired height position. The main 90 frame11 issupportedonthebaseframe50withthe aid of straps 54 and adjustment of the frame 50 can raise and lowerthe main frame 11. The base frame 50 can be made up from easily-assembled units permitting the frame 50 to be built up to any desired 95 height.

Figures 3 and 4 depict one of a pair of units 40 which combine to form another form of base frame 50 for holding the maching 10 in an elevated disposition. As shown each unit has major and minor up-100 standing support legs 41,42 interconnected with bracing straps 43,44. The side members 28 of the machine frame 11 are detachably fixed to adjustable mounting blocks 81 on the major legs 41 of the units 40. The legs 41,42 are provided with adjustablefeet 105 45 which can be swivelled and raised and lowered with the aid of adjusting rings 46. Each major leg 41 is additionally provided at its upper end with a bracket 47 pivotably joined to an inclined support arm 48. The lower end of the arm 48 is provided with 110 a strap 49 which receives another adjustable foot 45.

As a general alternative to the base frames 50, the machine 10 may be carried by a mobile vehicle capable of holding theframe 11 in an elevated position against the surface 30. Figure 5 depicts a vehicle 59 115 which has a raisableand lowerable jib or arm 60 supporting theframe 11 in a detachable manner. A linkage 61 can be interposed between the frame 11 and the arm 60.

120 CLAIMS

1. Apparatus for use in engraving an upstanding concretious surface in an elevated position in situ; said apparatus comprising a frame, means on the 125 frame for receiving one or more stencils, a carriage, means supporting the carriage for movement relative to the frame within a plane parallel to the surface to be engraved, an engraving tool ortool holder supported by the carriage for permitting the tool to en-130 gage the surface to be engraved, a stencil guide

Claims (8)

1. 2

   GB 2 183 550 A

   2

   which can bemadetofollowa pattern defined bya stencil by movement of the carriage in said plane, and meansfor supporting theframe in said elevated position alongside the surface to be engraved orfor 5 raising and lowering the frame to andfrom such a position.
2. 2. Apparatus according to claim 1,whereinthe frame is composed of side members with a channellike tra nsverse structu re th ere betwee n, sa id stru c-

   10 ture constituting at least in part the stencil reception means.
3. 3. Apparatus according to claim 1,whereinthe carriage support means supports the carriagefor movement in orthogonal directions.

   15
4. 4. Apparatus according to claim 2, wherein a first set of elongate guides extend between the side members, and the carriage support means takes the form of bearing collars mounted for sliding on said first set of guides, a further set of elongate guides

   20 extending perpendicularlytothefirstset of guides and interconnecting said collars and further bearing collars mounted to the carriage for sliding on said further set of guides.
5. 5. Apparatus according to claim 4, wherein the

   25 furtherset of guides are interconnected by a cross-piece serving as a handlefor displacing the carriage along the first set of guides and the carriage has a further handle for displacing the carriage along the furtherset of guides.

   30
6. 6. Apparatus according to any one of claims 1 to 5, wherein the support meansfor the frame compries a further adjustable base frame.
7. 7. Apparatus according to any one of claims 1 to 5, wherein the support means fortheframecom-

   35 prises a raisable and iowerabie jib of a mobile vehicle.
8. 8. Apparatus substantially as described with reference to, and as illustrated in, Figure 1 of thethe accompanying drawings in conjunction with Figure

   40 2, Figures 3 and 4 or Figure 5 of the accompanying drawings.

   Printedfor Her Majesty's Stationery Office by Croydon Printing Company (UK) Ltd,4/87, D8991685.

   Published by The Patent Office, 25 Southampton Buildings, London, WC2A1AY, from which copies may be obtained.