US1672332A - Hoisting and supporting bracket - Google Patents

Description

June 5, 1928. 1,672,332 c. L. MAITLAND HOISTING AND SUPPORTING BRACKET Filed May 1927 3 Sheets-finest l I 65 6] I 15 19 7 f a n 7" J19 X i 27 a2 2 i 12 i 25 Z 35 i 5] 3747 14 lnvarrrun CHARLES. LMAITLAND.

June 5. 1928. 1,672,332

c. MAITLAND HOISTING AND SUPPORTING BRACKET Filed May 2. 1927 w s Sheets-Sheet 2 luvzrrrua CHARLIE-5. L.MA|TLAND Jame 5, 1928.

C. L. MAITLAND HOISTING AND SUPPORTING BRACKET Filed May 1927 5 Sheets-Sheet 3 INVENTUR. CHARLE5.L.MAITLAND.

Patented June 5, 1928.

UNITED STATES 1, 72,332 PATENT OFFICE.

enemas LESLIE minimum; or rasrsn, ONTARIO, CANADA.

norsrme AND surronrrne nnacxnr,

Application filed May 2, 1927. Serial No. 188,276.

This invention relates to improvements in hoisting and supporting brackets and more particularly to devices of this character associated with silos and the li'keiand as disclosed in my previously filed application in the United States, No. 144,841. p

The objects of the invention are to provide a bracket of this description for hoisting conducting or loading pipes adapted for ensilage blowers and the like for retaining them in elevated position while the silo is being loaded. I

A further object is to provide a hoisting bracket of this description provided with an automatically operable gripping member to engage with thei loading pipe and tosecurely retain it until manually released therefrom and which is readily and conveniently operable from the ground.

With these and other objects which will be hereinafter more fully discussed in view, the invention which is illustrated in the accompanying drawings in connection with a silo, can be employed under any other suitable conditions and comprises a supporting and hoisting member provided with-a spring actuated retaining member normally closed to embrace the object to be hoisted and' adapted to open automatically when released and close automatically on contact with an object.

Referring now to the drawings in which I like characters of reference indicate. come parts in each figure Figure 1 is a side elevation of the hoisting device as applied to a silo.

' Figure 2 is a side elevation of the bracket. Figure 3 is a plan view of thebracket, Figure 4 is an'end view of the bracket. Figure 5 is an enlarged section on the line 5-5 of Figure 2.

Figure 6 is an enlarged plan view of the bracket with the upper structure removed showing the locking collar.

Figure 7 is a section on the line 7-7 of Figure 6.

Figure 8 is an enlarged section on the line 88 of Figure 1. l k I Referring more particularly to the drawings in which a preferred example of my invention is disclosed A designates'the hoisting and supporting device adapted to be secured inan manner to the side wall of a silo B. The member A comprises an iron frame of substantially 'V-shaped formation here shown sponding as a whole well known as shaped from a single strip of metal with sides 10 and 11 adapted at their outer ends 12 to contact with the wall B of the silo andsuitably bevelled for this purpose as at 14. To these sides are connected suitable bracing members 15 and lfi'substantially V- shaped in formation and having therebetween a central block portion 17 adapted to lie flat against the wall B of the silo and to receive therein a retaining bolt 18 extending through the wall. This bolt is provided at its outer end with handle-means as at 19. A reinforcing cross bar is indicated by the numeral 20 and adjacent to this barand mounted in suitable bearings in the sides 10 and 11, is a roller 21 manually operable by-means of'a handle 22 and designed to carry a cable or the like when not in use. A further reinforcing cross bar is indicated by thenumeral23 while the V-shaped end of thebracket is curved as at 24.

" A-centrally extending plate 25 is pro-" vided hingedl connected at one end as at 26 to a plate 2 adapted to lie snugly'ag'ainst the central block portion 17 and to be securely bolted thereto. The other end of this plate is forked as at 28 and rigidly secured to the sides 10 and llrespectively, Intermediately the plate is adapted to be collapsed, the forked portion 28 being pivotally jointed to the mainportion 25 by a pin29 (see Figure 5) and adapted to be looked in this position by'a second pin 30 extending through both members. g

On the side of the forked portion (see Figure 5) is a plate 31 enga ing with the pin 29 and hinged'ly connecte to this plate at 32 is a second plate 33 lying parallel therewith and carrying the locking'pin 30. "For retaining this second-plate 33 securely in position a'plate 34 spaced therefrom and connectedto the'hin'ge 32 is provided and carries a coil spring 35 adapted to exert pressure against the plate 34 whereby the locking pin 30 securely held-in position. When it 'is desired to collapse the member 25 the locking pin is-disengaged permitting the member tos'wing on the pin 29.

Referring now to the -1pe retaining means for the member A whic is an essential feature of m invention, a rod 36 iscentrally arranged 1n the bracket and protruding beyond the end thereof (see Figures 6 and'7). This rodfis slidably supported in the memher A and-at itsprotrudmg end is hingedly connected to the semi-circular inner clamping sections 37 and 38, while co-ordinating with these sections and spaced therefrom are the semi-circular sections 39 and 40 forming an outer collar member hinge'dly connected at their inner ends as at 41 and 42 to a curved plate 43 in turn bolted to the curved end 24 of the bracket member A. These sections at their outer ends are hingedly connected at 44 and 45 to the outer ends of the sections 37 and 38 forming the inner collar. The slidably mounted rod 36 is fixedly secured at its bent inner end as at 46 to a plate 47 This plate is hinged at-48 to a plate 49 formed with an offset 50 to engage and disengage with the cross rod 23, the outer end of the plate 49 being connected to a coil spring 51 in turn anchored to a hinge pin 52 of the inner collar or clamping member whereby on the plate 49 being released from engagement with the cross bar 23the spring 51 acts to cause the bolt or'pin 36 to move outwardly and simultaneously therewith the collar or clamping sections 37 and 38 to spread or open so that on a pipe or other object to-be hoisted engaging these sections and exerting pressure on the protruding end of the bolt 36 the latter moves automatically inwardly until the oflset 50;in the plate 49 again'engages under the influence of the spring 53 the cross bar 23 while simultaneously with this movement inwardly of the bolt 36the aforementioned collar sections or clamping elements automatically resume a clamping position v as illustrated in full lines'in Figure 6, thus holding the object to be hoisted ready to be drawn up. w

The spring 53 fits between the bent portion of the bolt carrying plate 47 and the retaining plate49 and is held in position by a lug 54 on the former.

It will thus .be seen that on the plate 49 being released the bolt or pin 36 through i the hingedconnection 48 and under the influence of the spring 51 will automatically move outwardly with the hinged plate 47. In Figure 1 in which my invention is illustrated in connection with a silo the object to be hoisted and retained in vertical position consists of a pipe 55 provided at its lower end with a fan or blower 56 and curved at its upper end as at 57 to discharge into the funnel shaped end of the distributing pipe 58 within the silo. The elevating pipe 55 comprises a number of sections bolted together as at 59, while substantially midway thereof as at 60 is a pulley connection. An eye bolt 61 is also connected to the portion 17. A cable 62 is also snap connected to the ring 63 on the bracket 64 brought up over a pulley 65 suspended from the-bracket member A and then downwardly The bracket 64 will act as a guide for the'foot or bottom of the pipe when elevating the pipe to be placed on the top of the corn cutter and is securely bolted to the top thereof. This bracket comprises a clamping section 69 hingedly connected at 7 0 to the bracket side member 71, while on the opposite side a hook member 72 is provided and'link connected by the link 73 to a locking dog 74 thereby locking the pipe and-clamping same in position A ring 63 is also carried on the side of the bracket.

It will thus be seen that on the cable being tensioned manually the filler member will automatically move upwardly to a vertical position as shown in Figure 1 and is fixedly retained in this positionby engagement with the collar sections of the bracket. Inother words the cable is connected to the member to be hoisted when it islying flat on the ground in horizontal or semi-horizontal position which will then be gradually moved to the vertical until it engages with the spread open collar sections as shownin Figure 6 in dotted lines, the operating plate 49 having been; released. Then as it enstructed without departing from the spirit or scope thereof, it, is intended that all matter 7 contained in the accompanying specification, and drawings shall be interpreted. as llllIS- trative and not in a limiting sense.

\Vhat I claim as my invention is z.

1. In a hoisting and supporting device the combination with a bracket-,of a collar formed in two sections hingedly connected to the bracket, a slidably mounted rod in the bracket, a second collar of lesser diameter than the aforementioned collar and formed, in-two sections hingedly connected to the rod and pivotally connected to the first mentioned collar sections, a cross bar for the bracket, a spring actuated plate formed with an offset adapted toengage and disengage withthe cross bar, a suitably bent plate hingedly connected to the aforementioned plate and rigidly connected to the rod, and spring means between said plates whereby the first mentioned plate is normally retained in engagement with the cross bar and the rod and collars in retracted and closed position respectively and whereby 0n the plate being released from thecross bar the rod moves outwardly and the collars automatically open to engaging position.

2. In a device of the character described, the combination with a bracket member provided with a collapsible centre plate, of a slidable rod, clamping and retaining means pivotally connected to one another and hingedly connected to the rod and the bracket respectively, a retaining plate rigidly connected to the rod, a second plate hingedly connected to the retaining plate and spring connected to the bracket, and means associated with the bracket for engaging the retaining plate whereby on the rod being moved inwardly the retaining plate automatically engages with the bracket and the clamping means automatically close, and whereby on the retaining plate being disengaged the rod automatically moves outwardly and the retaining means automatically swing open.

3. In a device of the character described and in combination, a bracket member, a slidably mounted rod for'the bracket mem ber and protruding therebeyond, a supporting plate rigidly connected to the rod, a

spring retalned engaging plate hingedly" connected to the supporting plate, and

tion within the bracket and whereby on the engaging plate being released the rod moves outwardly, co-ordinating clamping and retaining members hingedly mounted on the rod and hingedly connected to the bracket and intermediately and pivotally connected to one another.

4. In a hoisting and retaining member and in combination, a bracket, a slidably mounted rod for the bracket and adapted to protrude beyond the bracket, manually operable spring actuated means for normally retaining the rod in retracted position whereby on said means being released the rod moves outwardly, a clamping and retaining member associated with the rod and automatically operable to open'and closed position respectively on the outward and inward movement of the rod.

In witness whereof I have my hand.

CHARLES LESLIE MAITLAND.

v hereunto set

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