Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1078577 A
Publication typeGrant
Publication dateNov 11, 1913
Filing dateJul 1, 1909
Priority dateJul 1, 1909
Publication numberUS 1078577 A, US 1078577A, US-A-1078577, US1078577 A, US1078577A
InventorsFarnham Fox
Original AssigneeFarnham Fox
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Telephone-bracket.
US 1078577 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

P. FOX.

TELEPHONE BRACKET.

APPLICATION FILED JULY 1, 1909.

Patented Nov. 11, 1913.

Z W 0X M I 5 m #MW 3 Em a 5 h MM COLUMBIA PLANOGRAPH c0.,wAsHlN0'roN. D. c.

FARNHAM FOX, OF NEW YORK, "N. Y.

TELEPHONE-BRACKET.

Specification of Letters Patent. Application filed July 1, 1909.

Serial No. 505,480.

To all whom it may concern:

Be it known that I, FARNHAM Fox, a citizen of the United States of America, and residing in the city, county, and State of New York, have invented a certain new and Improved Telephone-Bracket, of which the following is a specification.

My invention relates to brackets and pan ticularly to telephone brackets, the object of my invention being to provide an improved device of this character.

In the accompanying drawings, Figure 1 is a side elevation of a bracket to which my invention is applied; Fig. 2 is a longitudinal section through the bracket arm: Fig. 3 is a broken section of the lower end of the bracket at right angles thereto; Fig. t is a transverse section on the line H, Fig. 2; Fig. 5 is a section through the friction device; Fig. 6 is a plan of the bracket fixture; Fig. 7 is a transverse section on the line 77, Fig. 6; Fig. 8 is a plan of the stop device; and Fig. 9 is a broken section of the upper end of the bracket.

In the present construction the bracket arm comprises two parts A and B united through a double-link connection at each end so that the parts slide over each other without separating, when the arm is raised or lowered. A sliding joint between the channol shaped parts A and B is obtained by turning in the edge a, b, of each part respectively andproviding at one end of each a recurvedflange a 72 in which the edge cab, of the other part respectively is engaged. These flanges a Z) need be extended only portion of the length of the parts A and B as shown, while the inturned edges a and I) may conveniently be carried the whole length of the arm thereby supplying broad bearing surfaces as well as presenting a more finished appearance to the arm.

In order to assist in the return of the arm to its upright position after it has been lowered, I provide a spring S secured to B at one end and at A at the other end, so that as the parts move over each other upon the raising or lowering of the arm, the spring is tensioned and to a considerable extent compensates the weight of the telephone or other appliance mounted in the carrier G. Since not only is this weight apt to vary but the strength of the spring is not always the same, I provide an adjusting nut D on the bolt 0 by means of which the tension of the spring may be varied. The other end of tion box is held rigid secured by screws y to the part A. A stop about to be described, over which the yoke slides, limits the extent of angular travel of the arm by striking against one end or the other of this yoke. In order to render the arm stationary in whatever position adjusted and thus obviate the necessity for maintaining a continuous pressure to overcome the tendency of the arm to rise under the action of the spring S, I provide a suitable friction device sition. This device in the form shown, comprises a channel section It with posts 22 on which are guided the coil springs c, the upper ends of which bear against the inner surface of the inverted channel section r of vulcanized fiber or other suitable substance adapted for frictional engagement with a metal surface. The friction box thus constituted is placed in the lower end of the part B where it is held rigid by the cross piece X, the upper surface of the vulcanized piece r bearing against the inner surface of the part A, with a pressure determined by the strength of the springs 0. Since the fricwith relation to B by the cross piece X, it is obvious that as the parts A and B move past each other on the angular movement ofthe arm, a frictional engagement between 0' and A is maintained and thus neutralizes the upward pull of the spring. I

- Clips I for the telephone wires are fastoned in one of the parts A or B and a stop M on the socket K is provided which impinges against the pin 70 in the upper end of the swivel pin P and thus prevents the arm from turning around on the latterand wrapping up or tangling the cord. The position of the pin 70 may be adjusted in any desired direction and there secured by the screw T, the terminal lug t of which enters recesses t in the lower end of the pin I and thus holds the same against angular move ment as well as preventing the pin from being displaced axially. j The construction shown and described is but one embodiment of my inventiomwhich may be varied in detail without departing from my invention.

I claim as my invention: I

1. In a device of the class described, a hollow supporting arm comprising opposed members in sliding engagement with each Patented nevqiniais.

the spring is attached to a yoke piece Y.

to hold the arm in po other and a link joint at each end between said parts, an expanding frictional device member, in combination with a yoke emwithin said arm interposed between said bracing said carrier and moving with the members and acting witlrconstant friction other member of said arm, said yoke being upon the movement of said members in of SlliliClGlll) length to permit limited longieither direction with relation to each other, tudinal movement of said carrier within the in combination with a spring actuated by same, substantially as described.

the movement of said parts past oneanother. In a device of the character described,

2. in a device of the character described, a a supporting arm comprising parts slidably hollow supporting arm comprising opposed connected together, a link joint at each end members having their meeting edges inter between said parts, a friction member interlocked in sliding engagement, in combinaposed between said parts and a carrier theretion with a pressure device arranged within for, means for securing said carrier on one said hollow arm and tending constantly to member, in combination with a yoke embracforce said mei bers apart whereby the fricing said carrier and moving with the other tion between the interlocked edges thereof member of said arm, said yoke being of is increased for the purpose specified. sufiicient length to permit limited longitudi- 3. In a device of the character described, a nal movement of said carrier within the hollow supporting arm comprisin opposed same, together with a spring, one end of members having their meeting edges interwhich engages said yoke and the other end locked in sliding engagement, in combinais made rigid with the member carrying the tion with a friction device arranged within friction device. said arm and comprising a spring-pressed 7. In a device of the character described, a friction element supported by one part and. supporting arm comprising parts slidably bearing constantly against the other part to connected together and a friction device hold the parts in the adjusted position of the within said arm carried by one of said parts arm. and constantly bearing against the inner a. In a device of the character described, a face of the other part, said friction device hollow supporting arm comprising opposed comprising a channel section, springs carmenil ers having their meeting edges interried thereby and a friction member suplocked in sliding engagement, a return ported by said springs. spring tending to maintain said parts in 8. In a device of the character described, predetermined relation to each other, "a yoke a supporting arm comprising parts slidably piece fast with one of said arm members connected together, a cross piece carried by and engaging one end of the spring, in comone of said parts, and a constantly acting bination with a friction device extending friction device lying within said arm and 138376611 said arm members and arranged held by said cross piece against longitudinal within said yoke and serving by its engagedisplacement with relation to said part, subment with the latter to limit the longitudinal t stantially as described.

displacement of said arm members with re- In testimony whereof I have signed my lation to each other. name to this specification in-the presence of 5. In a device of the character described, I two subscribing witnesses. a su aoortin arm comprisin carts slidably T comie cted tdgether, a link jo init at each end FARYIIAM between said parts, a friction member inter lVitnesses: posed between said parts and a carrier there rimmer Assn, for, means for securing said carrier on one Hnnnnr Howson.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, IMO.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2941776 *May 13, 1957Jun 21, 1960Ritter Co IncCounterbalancing mechanism
US3426190 *Nov 7, 1966Feb 4, 1969P N Luminous Equipment CoSupport arms for lamps and the like
US3774873 *Nov 24, 1971Nov 27, 1973Jacobsen As JEquipoised arm assembly
US5042763 *Jan 5, 1990Aug 27, 1991Wong William W MSelf-leveling portable camera support apparatus
Classifications
U.S. Classification248/569, 248/575, 248/586
Cooperative ClassificationF16F15/02