US2661717A - Conveying means for articles to be treated in a galvanizing bath - Google Patents

Description

2 Sheets-Sheet 1 Fig.1 Ewen-501 cI M I. WILSON Dec. 8, 1953 CONVEYING MEANS FOR ARTICLES TO BE TREATED IN A GALVANIZING BATH Filed March 30, 1951 Dec. 8, 1953 E. MCI. WILSON 5 I7 CONVEYING MEANS FOR ARTICLES TO BE TREATED IN A GALVANIZING BATH Filed March 50, 1951 2 Sheets-Sheet 2 Fig.2 122/0 612E601 Paten tec l Dec. 8,

' oiivtmi sit/muss Fomsnoms' Tons 'TREKTED'I A V N ZING BATHj ElIWMd McIvor. JWilson, Birmingham, England; *assignm: 120 Heiniy rHope '& -'Sons Limited,--z-Bjre mineham-Z-E-ngland appetite Marine), 1951, Serial No.'-218;5'04 i J warms. (01. 118-500.)

In the galvanising of steel window or door amsspsg r rt le ii: -l fime ..fiP vide above the galvanising bath, a mechanism for lowering andiir'a'i'sing theJarticl'es into and from bj ect of the present invention is. to enable 1th saa meenamsmto impart a -shaki ngforsjqg- 5 actionj -t'o"the"aftieles,"for .ensuring, uniorm mg ofthe" articles when; fiflirriersed and jdeta'enmm of excess" cliatingmetal" while thearticles are being withdrawn from the bath.

The invention comprises the combination with the raising and lowering mechanism, of a spring arranged at a position between the source of motion and the part which carries the articles to be treated, and means for intermittently compressing the spring and thereby imparting a jogging motion to the articles.

In particular the invention comprises an arrangement as specified in the preceding paragraph, which includes pneumatic means for compressing the spring, and intermittently actuated valve for controlling the supply of compressed air to and from the said means.

In the accompanying drawings:

Figure 1 is a diagrammatic view illustrating a galvanising apparatus provided with the invention.

Figure 2 is a front elevation to a larger scale that Figure 1 showing the means in accordance with the invention for interconnecting the movable part of the conveyor track and the raising and lowering mechanism.

A known form of apparatus for use in galvanising steel window or door frames'or other articles, comprises (as shown in Figure 1), an overhead conveyor track a on which can travel a carriage from which the articles are suspended. In the portion of the track above the galvanising bath b there is provided a movable part c which can be lowered for effecting the dipping operation. This part c is guided by guide rods d and is suspended by a suspension rod e. The upper end of the rod e is pivotally attached to one side of an endless chain I carried by sprockets 9, one of which is driven from any convenient source of motion for lowering and raising the track part c.

In applying the invention to an apparatus as above described, there is secured to the upper side of the track part c a frame It provided with a cross bar 2. The-cross bar supports one end of a piston rod 9' extending from a piston in an air cylinder 70. The latter is connected through a shackle m'to a rod 0 which is slidably supported by the upper end of the frame h. On the rod 0 is mounted a spring 1) which is supported at one in a simple and reliable manner.

eridiiy tnerrain ad,. atsears eta-b "a 1:011- larsecur d to. eib'd rod o' is 'securedlto ajblockiq tmwhich .is

attalchdthe loiter lendgo'f aflijrik r, .andlimslid a ble assticiation with .thi link]. i'sfprovided-La. rod. :3 which 1 at its upper. fen "isj secu eefby a block; tito "fro "aj th rons Qnnected "by? ifspr ingj. u. I ,iisjnierl fiogensur'e l'ose' fitting 6f thep-ait 6 6f thetrafiHWh'efl it 'is returned to the main part a of the track.

Compressed air is admitted to and exhaustedfrom the lower end of the cylinder is by a flexible pipe 12 (Figure 1), under the control of a valve w which is actuated at an appropriate rate by any convenient means such as an electromagnet which is self controlled by any convenient electrical or other timing means (not shown). If desired air may also be admitted to and exhausted from the upper end of the cylinder k by way of a second pipe 0 under the control of the valve 20.

After the movable part c of the track and the carriage thereon, together with the articles to be galvanised, having been lowered (as shown in Figure 1) to immerse the articles in the bath, air is admitted to the lower end of the cylinder it. As the cylinder cannot move, the effect of the air pressure is to move the piston upwardly, and (by the resultant force exerted through the piston rod 9' on the bar 2'), to move the frame h (together with the track part c) upwardly against the action of the spring p. On release of the air pressure, the spring p returns the parts to their initial position suddenly, thus imparting a jolt to the articles suspended from the track part c. If desired air may also be admitted to the upper end of the cylinder k to supplement the action of the spring p, though this is not essential. The jogging or jolting action is repeated to ensure uniform coating of the articles. Also it is continued during the withdrawal of the articles from the bath, to ensure detachment of excess zinc which might otherwise form solid drops on the articles.

By this invention the desired object is attained The invention is not, however, restricted to the example described, as the means for alternately compressing and releasing the spring 11 may be varied, though a pneumatic mechanism is preferable on account of its simplicity and convenience.

Having thus described my invention what I claim as newand desire to secure by Letters Patent is:

1. Conveying means for articles to be treated in a galvanising bath, comprising in combination a mechanism for loweringand raising the articles into and from the bath, carrying means for the articles, said carrying means being movably attached to said mechanism for reciprocatory motion relatively thereto, a pair of springsupporting abutments provided on said mechanism and carrying means respectively, a spring arranged between and supported at its ends by said abutments so that said spring is energisable by vertical movements of said carrying means in one direction relatively to said mechanism, and power-operated means connected to said mechanism and arranged to act on said carrying means for co-operating with said spring to effect intermittent vertical reciprocatory motion of said carrying means relatively to said mechanism, and thereby impart a jogging motion to articles on said carrying means.

2. Conveying means as claimed in claim 1, in which the power operated means comprise a piston and cylinder mounted respectively on said mechanism and carrying means, and relatively movable under the action of compressed air.

3. Conveying means for articles to be treated in a galvanising bath; comprising in combina- 25 tion a mechanism for raising and lowering the articles into and from the bath, carrying means for the articles including a vertically movable track part provided at its upper side with a frame carrying means.

which has a slidable connection with said mechanism to permit reciprocatory motion of said carrying means relatively to said mechanism, an air cylinder attached to said mechanism, a piston in said cylinder, a piston rod extending from said piston and connected to said frame, a pair or spring-supporting abutments on said mechanism and frame respectively, a compression spring arranged between and supported at its ends by said abutments so that said spring is compressible by upward movement of said carrying means relatively to said mechanism, and means for controlling the flow to and from said cylinder of compressed air whereby said piston is caused to cooperate with said spring for effecting intermittent vertical reciprocatory motion of said carrying means relatively to said mechanism, and thereby imparting a jogging motion to articles on said EDWARD McIVOR WILSON.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,027,402 Cleal May 28, 1912 1,092,761 Tyler Apr. '7, 1914 1,608,293 Beebe Nov. 23, 1926 2,397,400 Barwich Mar. 26, 1946 m mm-

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