US 919777 A
Description (OCR text may contain errors)
R. B. sAvIN & W. c. HARVEY.
ADJUSTABLE WALL BRAOKET. ALELIOATION FILED JULY'SI, 1908.
Patentea Apr. 27, 1909.
WI TIIESSES I In: NORRIS PETERS co., wAsHmomN, n. c.
UNITED STATEs PATENT OFFICE.
RALPH B. SAVIN AND WILLIAM C. HARVEY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TO THE S. S. WHITE DENTAL. MFG. 00., OF PHILADELPHIA, PENNSYLVANIA.
AD JUSTABLE WALL-BRACKE T.
To all whom it may concern Be it knownthat we, RALPH B. SAvIN and:
WILLIAM C. HARVEY, citizens of the United States, residing at Philadelphia, in the county of Philadelphia and State of Penn- Brackets; and we do hereby declare the following tobe a full, clear, and exact descrip tion of the invention, such as will enable others skilled in'the art towhich-it apper tains to make and use the same. 1
Our invention relates to folding or adjustable wall-brackets for so supporting objects that they may be moved in a substantially horizontal plane into various posltions' nearer to or farther away from the wall and also be movedinto an inoperative position close to or against the wal be out of the way-.-
The object of our-invention is to simplify and improve the bracket forming the subject matter of Letters 'PatentNo. 717,121,
granted December 30, 1902, to the assignee of Charles H. Richardson. This bracket consists of a main section having vertical rocking connection with a wall, a forearm section adapted to support an object or load at its outer extremity, connections between the two sections which enable the forearmsection to rock vertically toward and away from the main section, and means for cans-- ing said sections, when the object or load is moved or placed in different positions, to move in unison toward and away from each other and maintain corresponding angular relations with respect to a vertical line drawn centrally between said sections. By this construction the weight ofthe object or load serves to poise the bracket as well as the object itself, by virtueof which the object may be freely moved toward and away fromthe position a y pe fect equipoise of'the bracket and its loadwall and remain inert in whatever 1t is placed, thus securing a pract cwithoutthe use of springs or weights other than the load itself.
tomove in unison is shown Specification of Letters Patent.
. Application filed July 31, 1908.
where they will In the patented bracket the means for causing the bracket sections Patented April 27, 1909.
Serial No. 446,252,
Our improvement consists in substituting a-sliding connection for said gearing.
The invention as applied to a dental bracket is illustratedin the accompanying drawings,- in which similar reference characters' refer to corresponding parts throughoutthe several views is fully described in the following s eci'fication, and claimed at the conclusion tiereof. 1 V In said drawings :Figure 1 is a view in side elevation showing the bracket extended in full" lines and folded and partly folded in dotted lines. Fig. 2 is a top or plan view on an enlarged scale as com ared with Fig. 1. Fig. 3 is a central 've'rtica sectional view on the line 3-3 of Fig; 2. Fig. 4 is a view in side elevation of a modified form of bracket. Fig.5 is a view similar to Fig. 3 of a modified form of sliding connection.
The bracket indicated in Figs. 1,2 and 3 consists 'of a main section A anda forearm section B, each section being composed in this particular embodiment of two parallel mem ers A and A and B and B respectively. At their inner ends the members A andA? are connected by pivots a and o to a bracket plate 0, havinghorizontal turning connection with a stationary wall-plate D, a ,pintle E connectingthe bracket and wall plates. At their outer ends said members A and A are pivoted-at a and a to a con-' necting-plate or plates F, corresponding to the so-called link-plates E, of the beforementioned Richardson patent No. 717,121. The members B and B of the forearm section are pivoted at their inner ends at b and 6 to said connecting plate F, and at their outer ends are pivoted at b and b? to an end piece or attaching plate G, to which the ob- 'ject supported by the bracket maybe attached. In order to preserve the horizontalityor verticality of the object supported by the bracket the distance between the pivotsa and a must be the same as that betweenthe pivots a and c and the distance between the pivots b and 11 must be the same as that between the pivots b and Z).
For the purpose of causing the bracket sections to move in the manner herein specifled and thus accomplish the object of our invention without the use of gearing, the
lower members A and B are extended beyond their pivotal connections a and 72* respectively, with the connection plate F. These extensions A and are disposed angularly to their respective members and are united by a sliding connection. In this instance each extension is provided. with a guide slot, as a and b and a bolt L passing through said slots and also through a vertical guide slot fin the connecting-plate F serves to connect the members A and and causes the bracket sections to move in unison.
In Fig. 5 we have indicated a modified form of sliding connection for uniting the members of the bracket sections. But one of the extensions is slotted at S and the bolt T which travels in said slot S in the extension B is fixed to the other extension A. There is no necessity in this case for the guide slot in the connecting plate.
In cases where it is not necessary or desirable to maintain the horizontality or vcrticality of the object supported by the bracket, one of the members of the forearm section may be omitted, as indicated in Fig. 4. The omission of one of these members in nowise affects the action of the bracket except that the horizontality or vcrticality of the object supported by the bracket is not maintained. When the forearm consists of only one member the attaching plate or end piece G is not required.
The embodiments of our invention herein shown and described are so constructed that the bracket folds downwardly when the object is moved toward the wall. It is possible by reversing some of the parts to cause the bracket to fold upwardly when the object is moved toward the wall. When the object supported by the bracket, which for example is herein indicated as consisting of an electric dental engine motor I, flexible shaft J and handpiece K, is moved from its extreme outer position (see full lines Fig. l) to a position near to or against the wall (see dotted lines Fig. 1) and vice versa, it moves in a practically horizontal plane; the bracket folding downwardly or upwardly, as above indicated, when the object is moved inwardly and straightening out when the object is moved outwardly. The weight of the object or load nicely poises itself and the bracket, and the main and forearm sections move in unison toward or away from each 5 other, whereby each section at any given point always bears the same angular relation to a vertical line drawn centrally between the sections as does the other section. There fore the object is always equipoised-and may be freel moved back and forth within the limits of the bracket and remain in whatever position it may be placed until positively moved therefrom. In other words the object will remain inert when placed in either of its extreme inner or outer positions and also when placed in any intermediate position.
It should be explained that as a matter of fact the object does not move in an absolutely horizontal plane, because in order to secure perfect equipoise of said object, the forearm section of the bracket is made larger than the main section. The difference in length between the two sections varies according to the weight of the object supported. This difference in length causes the object to move in a slightly inclined plane, but for all practical purposes it may be said to move in a substantially horizontal plane. By means of the pivotal connection between the bracket plate C and the wall plate D the bracket and object supported thereby may be swung horizontally. Also, by locating the pivots of the upper member of the main section in advance of the pivots of the lower member of said section, the sections of the bracket may assume a vertical position close together when folded. hen thus folded the bracket may be swung horizontally to lie flat against the wall, whereby the bracket is compactly folded and occupies a minimum amount of space. The lower member of each section is shown as hollow in order that the motor conductor X may pass through said members.
IVe claim as our invention 1. In a folding or adjustable wall bracket, the combination of a wall plate, a main section composed of parallel members pivoted to said wall plate so as to move vertically, a forearm section adapted to support an object at its outer extremity, a connecting plate to which said sections are pivoted, one member of the main section and the forearm section being extended beyond their pivotal connections with the connecting-plate, said extensions being disposed angularly to each other, and a sliding connection between said extensions.
2. In a folding or adj ustablc wall bracket, the combination of a wall plate, a main section composed of parallel members pivoted to said wall plate so as to move vertically, a forearm section adapted to support an object at its outer extremity, a connecting plate or plates to which said sections are pivoted, one member of the main section and the forearm section being extended beyond their iivotal connections with the connecting-plate, a guide slot in each of said extensions, a guide slot in said connecting-plate, said slots being disposed angularly to each other, and a bolt passing tl'irough said slots.
3. In a folding or adjustable wall bracket, the combination of a wall plate, a main sec tion composed of parallel members pivoted connecting-plate, said slots being disposed to said wall plate so as to move vertically, a I angularly to each other, and a bolt passing forearm section also composed of members, an attaching plate to which the parallel through said slots.
In testimony whereof we affix our signa- 1.5
outer ends of the members of the forearm sectures in presence of two Witnesses.
tion are pivoted, a connecting-plate or plates to which the members of both of said sections are pivoted, one member of each section being extended beyond its pivotal connection with the connecting-plate, a guide slot in each of said extensions, a guide slot in said RALPH B. SAVIN. WM. C. HARVEY.
MARY MOALLA, STEPHEN F. BEALE.